Message Handlers
Hi Experts,
The message_handler which we have access to in the generic service uses the interface IF_HRBAS_MESSAGE_HANDLER which have only ADD_MESSAGE method.
We have a situation where the messages from one form's errors are not being cleared when changing onto to different aspects of the form.
Just wondering if we have an alternative way like DELETE_MESSAGE inorder to avoide the duplicates and repeated messages.
Thanks In Advance,
Regards,
Kumar
Not sure what you mean or what you are trying to do.
Generally in your generic service, you are using the message handler to add your messages onto the "message stack". In that way, when the user triggers to go through services (by user events or by a "check" event such as "check and send") your messages will appear in the returned "list" of messages that are displayed as the framework traverses through your configuration and executes each service. Why would you not want that?
Again....what is it you are trying to do? I am not following what you mean by
"messages from one form's errors are not being cleared when changing onto to different aspects of the form."
Similar Messages
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Rejected Message Handlers in OSB
The official documentation of Oracle JCA adapters
http://docs.oracle.com/cd/E12839_01/integration.1111/e10231/life_cycle.htm#BABBHJEA
says that one can have a Web Service invoked whenever the JCA File Adapter rejects a message,
and this invokation would include the error details.
However, I have found examples only for a BPEL Error Handler, and not a WebService Error Handler.
I have tried providing a dynamic JCA activation property "rejectedMessageHandlers=wsif:// http:// pierrepc:7001/ errorhandler/ rejectionMessagePS? WSDL | handleRejection | message" , where myhandler is the URL of a Proxy Service based on a WSDL, but I keep getting the error
"Error while trying to hand off bad message to Rejection handler wsif : // http: // pierrepc:7001/ errorhandler / rejectionMessagePS?WSDL | handleRejection | message due to: Unable to find an available port"
The WSDL is:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<definitions name="RejectionMessage"
targetNamespace="http://xmlns.oracle.com/pcbpel/rejectionHandler"
xmlns:tns="http://xmlns.oracle.com/pcbpel/rejectionHandler"
xmlns:err="http://xmlns.oracle.com/pcbpel/errorHandling"
xmlns="http://schemas.xmlsoap.org/wsdl/"
xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
>
<!-- Message Type for JCA Adapter Framework onReject() callback -->
<types>
<schema xmlns="http://www.w3.org/2001/XMLSchema">
<import namespace="http://xmlns.oracle.com/pcbpel/errorHandling"
schemaLocation="JCAErrorHandling.xsd"/>
</schema>
</types>
<message name="RejectionMessage">
<part name="message" element="err:RejectedMessage"/>
</message>
<portType name="RejectionHandlerPortType">
<operation name="handleRejection">
<input message="tns:RejectionMessage"/>
</operation>
</portType>
<binding name="rejectedmessageSOAP" type="tns:RejectionHandlerPortType">
<soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
<operation name="handleRejection">
<soap:operation soapAction="http://www.example.org/rejectedmessage/handleRejection"/>
<input>
<soap:body use="literal"/>
</input>
</operation>
</binding>
<service name="rejectedmessage">
<port binding="tns:rejectedmessageSOAP" name="rejectedmessageSOAP">
<soap:address location="http://www.example.org/"/>
</port>
</service>
</definitions>
and the XSD is
<?xml version="1.0" encoding="UTF-8"?>
<schema attributeFormDefault="qualified" elementFormDefault="qualified" targetNamespace="http://xmlns.oracle.com/pcbpel/errorHandling" xmlns:tns="http://xmlns.oracle.com/pcbpel/errorHandling" xmlns="http://www.w3.org/2001/XMLSchema">
<element name="FatalErrorMessage" type="tns:FatalErrorMessageType"/>
<complexType name="FatalErrorMessageType">
<sequence>
<element name="Originator" type="string"/>
<element name="Reason" type="string"/>
<element name="Exception" type="string"/>
<element name="StackTrace" type="string"/>
</sequence>
</complexType>
<element name="RejectedMessage" type="tns:RejectedMessageType"/>
<complexType name="RejectedMessageType">
<sequence>
<element name="MessageHeader" type="base64Binary"/>
<element name="MessagePayload" type="base64Binary"/>
<element name="RejectionReason" type="string"/>
<element name="AdditionalProperties" type="tns:AdditionalPropsType"/>
</sequence>
<attribute name="RejectionId" type="string"/>
<attribute name="BatchId" type="string"/>
<attribute name="BatchInfo" type="string"/>
<attribute name="PrimaryKey" type="string"/>
<attribute name="MessageOriginReference" type="string"/>
</complexType>
<complexType name="AdditionalPropsType">
<sequence>
<element name="RejectionProp" type="tns:RejectionPropType" minOccurs="0" maxOccurs="unbounded"/>
</sequence>
</complexType>
<complexType name="RejectionPropType">
<simpleContent>
<extension base="string">
<attribute name="name" type="ID" use="required"/>
<attribute name="value" type="string" use="required"/>
</extension>
</simpleContent>
</complexType>
</schema>
Any clue?
I have invoked successfully the Proxy Service with the original WSIF libraries from Apache http://ws.apache.org/wsif/wsif_samples/index.html .... I don't see why the collaxa-third party library in the Oracle Adapter refuse to parse the WSDL...
thanks!
Edited by: Pierluigi Vernetto on 27-Jan-2012 04:22Maybe this can help - http://www.javamonamour.org/2011/11/osb-and-rejectedmessagehandlers-in-jca.html
-
Named Queues in Queeued Message Handlers
I have a question as it pertains to the Producer/Consumer design pattern and using Queued Message Handler.
I know it's a good idea to to name the queues, but it confuses me as to WHY I need to name it. I've never seen an example to where the named queue is used in the BD other than when naming the queue, is there? I've always used a strict type-def Emunerated Control to control my states in the consumer. Isn't this enough? If someone could shed some light, I think it would go a long way to making some of my programs more robust.In LabVIEW, an application instance (sometimes also referred to as a context) is something which represents a fully enclosed "area". Anything inside this area is unique to it and can't be accessed directly from any other application instance. This includes things like queue references, VI references, loaded VIs in general, etc. Some of these things can be accessed through established APIs (for instance, VI server does allow you to access other instances, but the queue primitives don't). Note that if you load the same VI in two projects and modify it in one of them, the VI in the other will not be updated until you press the green arrows sync button which appears when you do this. Essentially, you get two copies of the same VI in memory.
Applications instances in LV include:
Every target in every open project.
Every executable.
Instances that LV or other toolkits use (like the application builder, which loads the files in a separate instance or the main LV instance, which is used if you don't have a project open). I think the main reason these are used is to prevent collisions.
Note that this is very different from actual namespacing (i.e. libraries like lvlib and lvclass) in that this is something transient. It's created by opening more than one project at a time, but it doesn't affect the VI itself. Libraries do affect the VI itself, because the VI knows which library it belongs to and it's something that sticks with it. That's real namespacing and the result is the fully qualified name which is made up of the owning libraries names and the VI names. You don't need more than that, because the FQN is only relevant inside the application instance (i.e. if you do an Open VI Reference, you need to give a FQN, but you also need to provide an application reference).
That was a bit stream of consciousness (I can never spell that word correctly) and I didn't understand the actual question, so hopefully it was clear enough.
Try to take over the world! -
Processing response message in webservice
Hello,
I'm quite a newbie with webservices and this question may seem quite stoopid but I'll ask it anyway...
I have built a small web service with JAX-RPC. I know that, with the ServiceLifecycle I can process the whole request message, SOAPHeaders and all, in the webservice itself. Does anyone know how can I process the outgoing response messages SOAP headers? I mean other ways than message handlers...
Thanks in advance!
RamiYou may wantto post this in the JWSDP community : https://jwsdp.dev.java.net/
-
Soap handlers not getting invoked for service control
Is it possible to attach soap handlers to the service control generated from a wsdl file.
The below link shows that we can add handlers to a service control but it doesn't work for me
http://e-docs.bea.com/workshop/docs81/doc/en/core/index.html
Below is the code I am using to declare the handler
* @jc:location http-url="https://rrad.carrierzone.com/rrad/server.php"
* @jc:wsdl file="#RRADServiceWsdl"
* @jc:handler callback="WebHostingHandler" operation="WebHostingHandler"
public interface rradsslControl extends com.bea.control.ControlExtension, com.bea.control.ServiceControl
Everything works perfect If I add a soap-handler to a webservice
Thanks,
SridharSridhar,
WLW doesn't support SOAP message handlers on messages that arrive via HTTP GET. If you are using the test console you need to use the Test XML page instead of the test form page
Additional info is available at http://e-docs.bea.com/workshop/docs81/doc/en/workshop/guide/getstarted/conSOAPHandlers.html
Also when referring to Workshop docs links, please use the URL listed at the bottom of the page. The URL from the browser address bar will also be http://e-docs.bea.com/workshop/docs81/doc/en/core/index.html
Cheers
Raj -
How to intercept incoming SOAP messages?
I'm using weblogic workshop 8.1 for creating web services. I need to intercept incoming SOAP messages in order to do some processing before executing the required function (especially i would like to be able to know which function is to be executed and if required, execute an athorer one, according to the processing result)
I've tryed the tutorial given in the help, but i can't get it work. I'm using the example here after and i'm getting the following error: " the element '@jws:handler' is not allowed at this location".
package Handler;
* @jws:handler operation="handler.ConsoleLoggingHandler"
public class HandlerExample1 implements com.bea.jws.WebService
static final long serialVersionUID = 1L;
/** @common:operation */
public String echoString(String inputString)
return inputString;
I will apreciate if some one has a clue to resolve this problem.
Thank youHello,
From [1], Handlers on incoming messages are invoked before the message
is delivered to the web service operation, and handlers on outgoing
messages are invoked after the web service operation has completed. The
web service itself is unaware of the presence of handlers. SOAP message
handlers are sometimes referred to as interceptors. Also see [2][3].
Did you include the code for the handler
(handler.ConsoleLoggingHandler)? [4]
Here's a simple handler example [5]
Hope this is of some value,
Bruce
[1]
http://e-docs.bea.com/workshop/docs81/doc/en/workshop/guide/getstarted/conSOAPHandlers.html
[2]
http://e-docs.bea.com/workshop/docs81/doc/en/workshop/guide/getstarted/conSOAPHandlers.html?skipReload=true#WhereHandlersFit
[3]
http://edocs.beasys.com/wls/docs81/webserv/interceptors.html#1060763
[4]
http://e-docs.bea.com/workshop/docs81/doc/en/workshop/guide/getstarted/conSOAPHandlers.html?skipReload=true#HandlerExample
[5]
http://webservice.bea.com/log.zip
Fatna wrote:
>
I'm using weblogic workshop 8.1 for creating web services. I need to intercept incoming SOAP messages in order to do some processing before executing the required function (especially i would like to be able to know which function is to be executed and if required, execute an athorer one, according to the processing result)
I've tryed the tutorial given in the help, but i can't get it work. I'm using the example here after and i'm getting the following error: " the element '@jws:handler' is not allowed at this location".
package Handler;
* @jws:handler operation="handler.ConsoleLoggingHandler"
public class HandlerExample1 implements com.bea.jws.WebService
static final long serialVersionUID = 1L;
/** @common:operation */
public String echoString(String inputString)
return inputString;
I will apreciate if some one has a clue to resolve this problem.
Thank you -
Guys,
I am successfull in implementing the Inbound Message Handler for security and other stuff, but the outbound message handler in a similar fashion isn't working...
Any clue on it....here is the configuration...
<bpel-message-handlers>
<message-handler id="out_interception">
</message-handler>
<outbound-flow>
<message-handler id="out_interception" />
</outbound-flow>
</bpel-message-handlers>
I am using Oracle BPEL PM 10.1.2.0.2 on Oracle AS in Windows/AIX platforms.
Thanks,
- Soumen.Hi Soumen,
this is not supported. :-(
But you can use requestHeaderHandlers and responseHeaderHandlers. Disadvantage is that you have to define it for each partnerlink. But is works.
Have a look here for example http://www.oracle.com/technology/products/ias/bpel/htdocs/callingstatefulwsfrombpel.html
Peter -
Error while creating new projects using api
Hello,
I am having error while creating projects using standard api, PA_PROJECT_PUB.CREATE_PROJECTS. The error I am having is as follow.
Source template ID is invalid.
===
My code is as follow:
SET SERVEROUTPUT ON SIZE 1000000
SET VERIFY OFF
define no=&amg_number
DECLARE
-- Variables used to initialize the session
l_user_id NUMBER;
l_responsibility_id NUMBER;
cursor get_key_members is
select person_id, project_role_type, rownum
from pa_project_players
where project_id = 1;
-- Counter variables
a NUMBER := 0;
m NUMBER := 0;
-- Variables needed for API standard parameters
l_commit VARCHAR2(1) := 'F';
l_init_msg_list VARCHAR2(1) := 'T';
l_api_version_number NUMBER :=1.0;
l_return_status VARCHAR2(1);
l_msg_count NUMBER;
l_msg_data VARCHAR2(2000);
-- Variables used specifically in error message retrieval
l_encoded VARCHAR2(1) := 'F';
l_data VARCHAR2(2000);
l_msg_index NUMBER;
l_msg_index_out NUMBER;
-- Variables needed for Oracle Project specific parameters
-- Input variables
l_pm_product_code VARCHAR2(30);
l_project_in pa_project_pub.project_in_rec_type;
l_key_members pa_project_pub.project_role_tbl_type;
l_class_categories pa_project_pub.class_category_tbl_type;
l_tasks_in pa_project_pub.task_in_tbl_type;
-- Record variables for loading table variables above
l_key_member_rec pa_project_pub.project_role_rec_type;
l_class_category_rec pa_project_pub.class_category_rec_type;
l_task_rec pa_project_pub.task_in_rec_type;
-- Output variables
l_workflow_started VARCHAR2(100);
l_project_out pa_project_pub.project_out_rec_type;
l_tasks_out pa_project_pub.task_out_tbl_type;
-- Exception to call messag handlers if API returns an error.
API_ERROR EXCEPTION;
BEGIN
-- Initialize the session with my user id and Projects, Vision Serves (USA0
-- responsibility:
select user_id into l_user_id
from fnd_user
where user_name = 'SSHAH';
select responsibility_id into l_responsibility_id
from fnd_responsibility_tl
where responsibility_name = 'Projects Implementation Superuser';
pa_interface_utils_pub.set_global_info(
p_api_version_number => l_api_version_number,
p_responsibility_id => l_responsibility_id,
p_user_id => l_user_id,
p_msg_count => l_msg_count,
p_msg_data => l_msg_data,
p_return_status => l_return_status);
if l_return_status != 'S' then
raise API_ERROR;
end if;
-- Provide values for input variables
-- L_PM_PRODUCT_CODE: These are stored in pa_lookups and can be defined
-- by the user. In this case we select a pre-defined one.
select lookup_code into l_pm_product_code
from pa_lookups
where lookup_type = 'PM_PRODUCT_CODE'
and meaning = 'Conversion';
-- L_PROJECT_IN: We have to provide values for all required elements
-- of this record (see p 5-13, 5-14 for the definition of the record).
-- Customers will normally select this information from some external
-- source
l_project_in.pm_project_reference := 'AGL-AMG Project &no';
l_project_in.project_name := 'AGL-AMG Project &no';
l_project_in.created_from_project_id := 1;
l_project_in.carrying_out_organization_id := 2864; /*Cons. West*/
l_project_in.project_status_code := 'UNAPPROVED';
l_project_in.start_date := '01-JAN-11';
l_project_in.completion_date := '31-DEC-11';
l_project_in.description := 'Trying Hard';
l_project_in.project_relationship_code := 'Primary';
-- L_KEY_MEMBERS: To load the key member table we load individual
-- key member records and assign them to the key member table. In
-- the example below I am selecting all of the key member setup
-- from an existing project with 4 key members ('EE-Proj-01'):
for km in get_key_members loop
-- Get the next record and load into key members record:
l_key_member_rec.person_id := km.person_id;
l_key_member_rec.project_role_type := km.project_role_type;
-- Assign this record to the table (array)
l_key_members(km.rownum) := l_key_member_rec;
end loop;
-- L_CLASS_CATEGORIES: commented out below should fix the error we get
-- because the template does not have an assigment for the mandatory class
-- 'BAS Test'
l_class_category_rec.class_category := 'Product';
l_class_category_rec.class_code := 'Non-classified';
-- Assign the record to the table (array)
l_class_categories(1) := l_class_category_rec;
-- L_TASKS_IN: We will load in a single task and a subtask providing only
-- the basic fields (see pp. 5-16,5-17,5-18 for the definition of
-- the task record)
l_task_rec.pm_task_reference := '1';
l_task_rec.pa_task_number := '1';
l_task_rec.task_name := 'Construction';
l_task_rec.pm_parent_task_reference := '' ;
l_task_rec.task_description := 'Plant function';
-- Assign the top task to the table.
l_taskS_in(1) := l_task_rec;
-- Assign values for the sub task
l_task_rec.pm_task_reference := '1.1';
l_task_rec.pa_task_number := '1.1';
l_task_rec.task_name := 'Brick laying';
l_task_rec.pm_parent_task_reference := '1' ;
l_task_rec.task_description := 'Plant building';
-- Assign the subtask to the task table.
l_tasks_in(2) := l_task_rec;
-- All inputs are assigned, so call the API:
pa_project_pub.create_project
(p_api_version_number => l_api_version_number,
p_commit => l_commit,
p_init_msg_list => l_init_msg_list,
p_msg_count => l_msg_count,
p_msg_data => l_msg_data,
p_return_status => l_return_status,
p_workflow_started => l_workflow_started,
p_pm_product_code => l_pm_product_code,
p_project_in => l_project_in,
p_project_out => l_project_out,
p_key_members => l_key_members,
p_class_categories => l_class_categories,
p_tasks_in => l_tasks_in,
p_tasks_out => l_tasks_out);
-- Check the return status, if it is not success, then raise message handling
-- exception.
IF l_return_status != 'S' THEN
dbms_output.put_line('Msg_count: '||to_char(l_msg_count));
dbms_output.put_line('Error: ret status: '||l_return_status);
RAISE API_ERROR;
END IF;
-- perform manual commit since p_commit was set to False.
COMMIT;
--HANDLE EXCEPTIONS
EXCEPTION
WHEN API_ERROR THEN
FOR i IN 1..l_msg_count LOOP
pa_interface_utils_pub.get_messages(
p_msg_count => l_msg_count,
p_encoded => l_encoded,
p_msg_index => i,
p_msg_data => l_msg_data,
p_data => l_data,
p_msg_index_out => l_msg_index_out);
dbms_output.put_line('ERROR: '||to_char(l_msg_index_out)||': '||l_data);
END LOOP;
rollback;
WHEN OTHERS THEN
dbms_output.put_line('Error: '||sqlerrm);
FOR i IN 1..l_msg_count LOOP
pa_interface_utils_pub.get_messages(
p_msg_count => l_msg_count,
p_encoded => l_encoded,
p_msg_index => i,
p_msg_data => l_msg_data,
p_data => l_data,
p_msg_index_out => l_msg_index_out);
dbms_output.put_line('ERROR: '||to_char(l_msg_index_out)||': '||l_data);
END LOOP;
rollback;
END;
===
Msg_count: 1
Error: ret status: E
ERROR: 1: Project: 'AGL-AMG Project 1123'
Source template ID is invalid.
PL/SQL procedure successfully completed.I was using a custom Application, which had a id other then 275 (which belongs to Oracle projects)
-
Hi All,
I am trying to call a BAM WS - http://<host>:9001/OracleBAMWS/WebServices/DataObjectOperationsByName. I have put the abstract WSDL in MDS and trying to call the BAM WS from a BPEK Process. Post deployment I go to the WS partner link properties and provide the HTTP username and password in the weblogic em console. Still i m getting a 401 - unauthorised error.
I am using SOA Suite 11g.
Can someone help please.
regards,
VishalNote sure if this possible.. but just wondering if you can try using <bpelx:remove> extention to delete the soap header variables..
Other viable option is to write SOAP Message handlers on your outbound webservices... -
Remove Soap Header while calling a WS from BPEL 11g
Hi
My requirement is to remove the entire SOAP Header tag in the invoke activity. How this can be achieved? Please help
thanks
SeshaNote sure if this possible.. but just wondering if you can try using <bpelx:remove> extention to delete the soap header variables..
Other viable option is to write SOAP Message handlers on your outbound webservices... -
Security error - User is not allowed to execute Proces - Resolved
Enabled security on my domain by editing message-handlers.xml :
<inbound-flow>
<!-- <message-handler id="default" />-->
<message-handler id="security" />
</inbound-flow>
commented out <property id="SecuredProcesses" > .. </property> to apply security to all processes.
Now when I initiate process through BPELConsole I tick the WS-Security and use bpeladmin/welcome1 as credentials (I'm logged into console as this), I get the following error. In fact I get the very same error if I make up a username/password.
<2007-10-24 08:17:41,343> <ERROR> <archi2.collaxa.cube> <BaseCubeSessionBean::lo
gError> Error while invoking bean "delivery": [com.collaxa.cube.engine.handlers.
HandlerInvocationException: Error while invoking inbound message handler.
An error has occurred while attempting to invoke the inbound message handler cla
ss "class com.collaxa.cube.security.Authenticator" for the message "". The exce
ption reported was: User is not allowed to execute Proces, User[true] process [f
alse]
ORABPEL-02175
In bpel.xml of the process itself I have this:
<?xml version = '1.0' encoding = 'UTF-8'?>
<BPELSuitcase>
<BPELProcess id="SQTest2" src="SQTest2.bpel">
<partnerLinkBindings> ....snip...
</partnerLinkBindings>
<preferences>
<property name="user" encryption="plaintext">bpeladmin</property>
<property name="pw" encryption="plaintext">welcome1</property>
</preferences>
</BPELProcess>
</BPELSuitcase>
If I don't supply username/password then I get "Could not apply security [No username provided, security expects user]" which sounds right enough.
I'm using the default authentication scheme system-jazn-data.xml and using 10.1.3.3 patchset on linux.My own fault, putting user credentials in wrong place in bpel.xml:
<?xml version = '1.0' encoding = 'UTF-8'?>
<BPELSuitcase>
<BPELProcess id="SQTest2" src="SQTest2.bpel">
<partnerLinkBindings> ....
</partnerLinkBindings>
<configurations>
<property name="user" encryption="plaintext">bpeladmin</property>
<property name="pw" encryption="plaintext">welcome1</property>
</configurations>
</BPELProcess>
</BPELSuitcase> -
Performance tuning in BDB Replication
Hi,
I have set up Berkeleydb replication with 1 master and 5 slaves for session management in our web application with webservers behind load balancer. Somehow i get stale session data from same of the slaves. Our application cannot live with stale data. Currently our environment is configured with following settings:
cur_env.SetEventNotification(new Env.EventNotifyFcn(event_callback));
cur_env.RepMgrAckPolicy = (Env.RepAckPolicy.NONE;
//cur_env.SetVerbose(Env.DbVerb.Replication, true);
cur_env.RepPriority = _config.priority;
cur_env.RepMgrSetLocalSite(_config._listener.host, config.listener.port);
foreach (RepHostInfoObj hostentry in config.hosts)
cur_env.RepMgrAddRemoteSite(hostentry.host, hostentry.port, Env.RepSiteFlags.None);
* We can now open our environment, although we're not ready to
* begin replicating. However, we want to have a dbenv around
* so that we can send it into any of our message handlers.
cur_env.CacheSize = new CacheSize(0, 500, 0); // 500MB cache
cur_env.SetFlags(EnvFlags.TxnNoSync, TRUE);
SHARED_DATA data = new SHAREDDATA();
data.ismaster = 1;
cur_env.SetPrivateData(_data);
cur_env.Open(_config.home, Env.OpenFlags.Create | Env.OpenFlags.Recover |
Env.OpenFlags.ThreadSafe | Env.OpenFlags.InitRep | Env.OpenFlags.InitLock | Env.OpenFlags.InitLog |
Env.OpenFlags.InitMPool | Env.OpenFlags.InitTxn, 0);
cur_env.RepMgrStart(_3, config.startpolicy);
Please check if the above configuration is good.
My application needs good perfromance with no stale data.
Kindly help.
Thanks,
KarthikData appearing on replica sites naturally lags behind the master,
simply because it takes some time to transmit across a network, and
apply updates to the database.
Would you rather have read operations on the replica wait until they
"catch up" to some certain point in the sequence of transactions
generated by the master?
Your an ack policy of "NONE" allows the master to race ahead of the
clients without bound. If you were to use the "ALL" ack policy then
commit operations at the master would try to wait until all replica
sites had received the transaction, and you would get closer to having
all sites progress in sync. Of course that slows down the master
though.
Is this the kind of "stale" data you're talking about, or something
more long-term?
Alan Bram
Oracle -
I want to make the item text of the combobox to be aligned vertically(Centred) . Actually I increased the height
of the combobox and after the increasing the combobox height, the text is not centred vertically.The code
snippet for increasing the height is as follows,
m_SpecifyCombo.SetItemHeight(-1,20);//CCombobox m_SpecifyCombo
After increasing the height the text in the combobox is not in the centre as shown in the below image,
But I want the text to be centred as shown in the below image.
Code snippet for owner drawn combobox:
#if !defined(AFX_CUSTCOMBOBOX_H__F8528B4F_396E_11D1_9384_00A0248F6145__INCLUDED_)
#define AFX_CUSTCOMBOBOX_H__F8528B4F_396E_11D1_9384_00A0248F6145__INCLUDED_
#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000
typedef enum {FONTS} STYLE; //Why have I enumerated, Cos, Maybe I might want something other than Fonts here
class COwnerDrawCombo : public CComboBox
// Construction
public:
COwnerDrawCombo();
COwnerDrawCombo (STYLE);
// Attributes
public:
void SetHilightColors (COLORREF hilight,COLORREF hilightText)
m_clrHilight = hilight;
m_clrHilightText = hilightText;
void SetNormalColors (COLORREF clrBkgnd,COLORREF clrText)
m_clrNormalText = clrText;
m_clrBkgnd = clrBkgnd;
static BOOL CALLBACK EnumFontProc (LPLOGFONT lplf, LPTEXTMETRIC lptm, DWORD dwType, LPARAM lpData);
void FillFonts ();
int GetSelFont (LOGFONT&);
// Operations
public:
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CCustComboBox)
public:
virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);
virtual void MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct);
protected:
virtual void PreSubclassWindow();
//}}AFX_VIRTUAL
// Implementation
public:
virtual ~COwnerDrawCombo();
// Generated message map functions
protected:
STYLE m_enStyle;
COLORREF m_clrHilight;
COLORREF m_clrNormalText;
COLORREF m_clrHilightText;
COLORREF m_clrBkgnd;
BOOL m_bInitOver;
void DrawDefault (LPDRAWITEMSTRUCT);
void DrawFont(LPDRAWITEMSTRUCT);
void InitFonts ();
//{{AFX_MSG(CCustComboBox)
afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
afx_msg void OnDestroy();
//}}AFX_MSG
afx_msg long OnInitFonts (WPARAM, LPARAM);
DECLARE_MESSAGE_MAP()
//{{AFX_INSERT_LOCATION}}
// Microsoft Developer Studio will insert additional declarations immediately before the previous line.
#endif //!defined(AFX_CUSTCOMBOBOX_H__F8528B4F_396E_11D1_9384_00A0248F6145__INCLUDED_)
// OwnerDrawCombo.cpp : implementation file
#include "stdafx.h"
#include "combobox.h"
#include "OwnerDrawCombo.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#define WM_INITFONTS (WM_USER + 123)
//I chose 123 cos nobody might use the same exact number.. I can improve this by use RegisterWindowMessage..
// COwnerDrawCombo
//Initial values of the text and highlight stuff
COwnerDrawCombo::COwnerDrawCombo()
m_enStyle = FONTS;
m_clrHilight = GetSysColor (COLOR_HIGHLIGHT);
m_clrNormalText = GetSysColor (COLOR_WINDOWTEXT);
m_clrHilightText = GetSysColor (COLOR_HIGHLIGHTTEXT);
m_clrBkgnd = GetSysColor (COLOR_WINDOW);
m_bInitOver = FALSE;
COwnerDrawCombo::COwnerDrawCombo (STYLE enStyle)
m_enStyle = enStyle;
m_clrHilight = GetSysColor (COLOR_HIGHLIGHT);
m_clrNormalText = GetSysColor (COLOR_WINDOWTEXT);
m_clrHilightText = GetSysColor (COLOR_HIGHLIGHTTEXT);
m_clrBkgnd = GetSysColor (COLOR_WINDOW);
m_bInitOver =FALSE;
COwnerDrawCombo::~COwnerDrawCombo()
BEGIN_MESSAGE_MAP(COwnerDrawCombo, CComboBox)
//{{AFX_MSG_MAP(COwnerDrawCombo)
ON_WM_CREATE()
ON_WM_DESTROY()
//}}AFX_MSG_MAP
ON_MESSAGE (WM_INITFONTS,OnInitFonts)
END_MESSAGE_MAP()
// COwnerDrawCombo message handlers
void COwnerDrawCombo::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
//I might want to add something else someday
switch (m_enStyle)
case FONTS:
DrawFont(lpDrawItemStruct);
break;
//I dont need the MeasureItem to do anything. Whatever the system says, it stays
void COwnerDrawCombo::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)
void COwnerDrawCombo::DrawFont(LPDRAWITEMSTRUCT lpDIS)
CDC* pDC = CDC::FromHandle(lpDIS->hDC);
CRect rect;
TRACE0 ("In Draw Font\n");
// draw the colored rectangle portion
rect.CopyRect(&lpDIS->rcItem);
pDC->SetBkMode( TRANSPARENT );
if (lpDIS->itemState & ODS_SELECTED)
pDC->FillSolidRect (rect,m_clrHilight);
pDC->SetTextColor (m_clrHilightText);
else
pDC->FillSolidRect (rect,m_clrBkgnd);
pDC->SetTextColor (m_clrNormalText);
if ((int)(lpDIS->itemID) < 0) // Well its negetive so no need to draw text
else
CString strText;
GetLBText (lpDIS->itemID,strText);
CFont newFont;
CFont *pOldFont;
((LOGFONT*)lpDIS->itemData)->lfHeight = 90; //9 point size
((LOGFONT*)lpDIS->itemData)->lfWidth = 0;
newFont.CreatePointFontIndirect ((LOGFONT*)lpDIS->itemData);
pOldFont = pDC->SelectObject (&newFont);
pDC->DrawText(strText, rect, DT_LEFT | DT_VCENTER | DT_SINGLELINE);
pDC->SelectObject (pOldFont);
newFont.DeleteObject ();
void COwnerDrawCombo::InitFonts ()
CDC *pDC = GetDC ();
ResetContent (); //Delete whatever is there
EnumFonts (pDC->GetSafeHdc(),NULL,(FONTENUMPROC) EnumFontProc,(LPARAM)this);//Enumerate
m_bInitOver = TRUE;
BOOL CALLBACK COwnerDrawCombo::EnumFontProc (LPLOGFONT lplf, LPTEXTMETRIC lptm, DWORD dwType, LPARAM lpData)
if (dwType == TRUETYPE_FONTTYPE) //Add only TTF fellows, If you want you can change it to check for others
int index = ((COwnerDrawCombo *) lpData)->AddString(lplf->lfFaceName);
LPLOGFONT lpLF;
lpLF = new LOGFONT;
CopyMemory ((PVOID) lpLF,(CONST VOID *) lplf,sizeof (LOGFONT));
((COwnerDrawCombo *) lpData)->SetItemData (index,(DWORD) lpLF);
return TRUE;
int COwnerDrawCombo::OnCreate(LPCREATESTRUCT lpCreateStruct)
if (CComboBox::OnCreate(lpCreateStruct) == -1)
return -1;
// TODO: Add your specialized creation code here
if (m_enStyle == FONTS)
//SetItemHeight(-1,30);
PostMessage (WM_INITFONTS,0,0);
return 0;
long COwnerDrawCombo::OnInitFonts (WPARAM, LPARAM)
InitFonts ();
return 0L;
void COwnerDrawCombo::OnDestroy()
if (m_enStyle == FONTS)
int nCount;
nCount = GetCount ();
for (int i = 0; i < nCount; i++)
delete ((LOGFONT*)GetItemData (i)); //delete the LOGFONTS actually created..
// TODO: Add your message handler code here
CComboBox::OnDestroy();
void COwnerDrawCombo::FillFonts ()
m_enStyle = FONTS;
PostMessage (WM_INITFONTS,0,0); //Process in one place
int COwnerDrawCombo::GetSelFont (LOGFONT& lf)
int index = GetCurSel ();
if (index == LB_ERR)
return LB_ERR;
LPLOGFONT lpLF = (LPLOGFONT) GetItemData (index);
CopyMemory ((PVOID)&lf, (CONST VOID *) lpLF, sizeof (LOGFONT));
return index; //return the index here.. Maybe the user needs it:-)
void COwnerDrawCombo::PreSubclassWindow()
// TODO: Add your specialized code here and/or call the base class
//Tried to do what Roger Onslow did for the button.. Did not work..?? Any R&D guys around :-)
Can anyone please let me know how can I achieve this.
Any help can be appreciated.
Thanks in advance
SivaVHi sivavuyyuru,
I cannot find a easy way to make this.
I think you may need to draw your own Combo Box control. And you could change the edit control more like static text. Check the article:
http://www.codeguru.com/cpp/controls/combobox/fontselectioncombos/article.php/c1795/Owner-Drawn-Font-Selection-Combobox.htm
In the resource editor, Owner draw -> variable , Has string->true, type->drop list.
The result:
Best regards,
Shu Hu
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Election problem after repeated split-brains with two nodes
Hi
I'm using a customized source based on BDB-5.1.19 (excxx_repquote)
with two site one - MASTER and the other SLAVE...
nsite=2
ack=quorum
- the master is writing to quotedb at a rate of 10 txn per sec
- the test consist to isolate the client from the master (split brain) and reconnect it after a random time include from 1sec to 10sec
the test run well about 10 times but at a moment the process slave receive DB_EVENT_REP_ELECTION_FAILED
and the master enter in election mode and never exit from the CLIENT mode. I must say that to freeze the client I decide to kill me (kill -9 my pid) when I receive such event...
here is the verbose log on the master...
[1307872770:871621][6510/47655809107168] MASTER: rep_send_function returned: 110
[1307872770:973655][6510/47655809107168] MASTER: bulk_msg: Send buffer after copy due to PERM
[1307872770:973667][6510/47655809107168] MASTER: send_bulk: Send 266 (0x10a) bulk buffer bytes
[1307872770:973672][6510/47655809107168] MASTER: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 68 eid -1, type bulk_log, LSN [21][986648] perm
[1307872770:973693][6510/47655809107168] MASTER: will await acknowledgement: need 1
[1307872771:26623][6510/47655809107168] MASTER: rep_send_function returned: 110
[1307872771:126380][6510/1162996032] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type log, LSN [21][946345]
[1307872771:126407][6510/1162996032] MASTER: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 68 eid -1, type dupmaster, LSN [0][0] nobuf
[1307872771:126695][6510/1162996032] MASTER: rep_start: Found old version log 17
[1307872771:126753][6510/1162996032] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 68 eid -1, type newclient, LSN [0][0] nobuf
[1307872771:126833][6510/1183975744] CLIENT: starting election thread
[1307872771:126876][6510/1183975744] CLIENT: Start election nsites 2, ack 1, priority 100
[1307872771:126890][6510/1183975744] CLIENT: Election thread owns egen 69
[1307872771:127423][6510/1173485888] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type newclient, LSN [0][0]
[1307872771:130079][6510/1183975744] CLIENT: Tallying VOTE1[0] (2147483647, 69)
[1307872771:130113][6510/1183975744] CLIENT: Beginning an election
[1307872771:130134][6510/1183975744] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 68 eid -1, type vote1, LSN [21][986728] nobuf
[1307872771:130147][6510/1173485888] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 68 eid -1, type master_req, LSN [0][0] nobuf
[1307872771:130438][6510/1152506176] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type vote1, LSN [21][946437]
[1307872771:130460][6510/1162996032] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type alive, LSN [21][986728]
[1307872771:130467][6510/1152506176] CLIENT: Updating gen from 68 to 70
[1307872771:130482][6510/1162996032] CLIENT: Received ALIVE egen of 71, mine 69
[1307872771:130503][6510/1162996032] CLIENT: Election finished in 0.003602000 sec
[1307872771:130515][6510/1162996032] CLIENT: Election done; egen 70
[1307872771:130534][6510/1152506176] CLIENT: Received vote1 egen 71, egen 71
[1307872771:130581][6510/1152506176] CLIENT: Tallying VOTE1[0] (0, 71)
[1307872771:130593][6510/1089075520] CLIENT: starting election thread
[1307872771:130619][6510/1152506176] CLIENT: Incoming vote: (eid)0 (pri)100 ELECTABLE (gen)70 (egen)71 [21,946437]
[1307872771:130642][6510/1152506176] CLIENT: Not in election, but received vote1 0x282c 0x8
[1307872771:130674][6510/1089075520] CLIENT: Start election nsites 2, ack 1, priority 100
[1307872771:130692][6510/1089075520] CLIENT: Election thread owns egen 71
[1307872771:130704][6510/1194465600] CLIENT: starting election thread
[1307872771:130733][6510/1194465600] CLIENT: Start election nsites 2, ack 1, priority 100
[1307872771:132922][6510/1089075520] CLIENT: Tallying VOTE1[1] (2147483647, 71)
[1307872771:132949][6510/1089075520] CLIENT: Accepting new vote
[1307872771:132958][6510/1089075520] CLIENT: Beginning an election
[1307872771:132973][6510/1089075520] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid -1, type vote1, LSN [21][986728] nobuf
[1307872771:132985][6510/1194465600] CLIENT: election thread is exiting
[1307872771:133012][6510/1089075520] CLIENT: Tallying VOTE2[0] (2147483647, 71)
[1307872771:133037][6510/1089075520] CLIENT: Counted my vote 1
[1307872771:133048][6510/1089075520] CLIENT: Skipping phase2 wait: already got 1 votes
[1307872771:133060][6510/1089075520] CLIENT: Got enough votes to win; election done; (prev) gen 70
[1307872771:133071][6510/1089075520] CLIENT: Election finished in 0.002367000 sec
[1307872771:133084][6510/1089075520] CLIENT: Election done; egen 72
[1307872771:133111][6510/1089075520] CLIENT: Ended election with 0, e_th 1, egen 72, flag 0x2a2c, e_fl 0x0, lo_fl 0x6
[1307872771:133170][6510/1173485888] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type alive, LSN [0][0]
[1307872771:133187][6510/1173485888] CLIENT: Racing replication msg lockout, ignore message.
[1307872771:173744][6510/1162996032] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type vote2, LSN [0][0]
[1307872771:173769][6510/1162996032] CLIENT: Racing replication msg lockout, ignore message.
[1307872771:231593][6510/1183975744] CLIENT: Ended election with 0, e_th 0, egen 72, flag 0x2a2c, e_fl 0x0, lo_fl 0x1c
[1307872771:231629][6510/1183975744] CLIENT: election thread is exiting
[1307872777:443794][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307872971:644194][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307873165:844583][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307873360:44955][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307873554:245347][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307873748:445736][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307873942:646117][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307874136:846509][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
.... and infinite stay to this situation
My question is why the Master is suddenly transformed into CLIENT and why it's never returning to the MASTER
Thanks in advance ...
here is the log for the client
[1307872315:455113][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][984396]
[1307872315:455134][1282/1160603968] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][984483] perm
[1307872315:609962][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][984733] perm
[1307872315:764958][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][984986] perm
[1307872315:919962][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][985238] perm
[1307872316:75018][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][985491] perm
[1307872316:229959][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][985741] perm
[1307872316:384949][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][985993] perm
[1307872316:499899][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][986141] perm
[1307872316:539895][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][986221]
[1307872316:540078][1282/1171093824] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][986307]
[1307872316:540100][1282/1160603968] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][986394] perm
[1307872316:694950][1282/1171093824] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][986648] perm
[1307872316:847349][1282/1129134400] MASTER: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid -1, type log, LSN [21][946345]
[1307872316:847698][1282/1171093824] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type dupmaster, LSN [0][0]
[1307872316:847999][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type newclient, LSN [0][0]
[1307872316:848168][1282/1171093824] MASTER: rep_start: Found old version log 17
[1307872316:848222][1282/1181583680] CLIENT: Racing replication msg lockout, ignore message.
[1307872316:848398][1282/1171093824] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid -1, type newclient, LSN [0][0] nobuf
[1307872316:848504][1282/1192073536] CLIENT: starting election thread
[1307872316:848542][1282/1192073536] CLIENT: Start election nsites 2, ack 1, priority 100
[1307872316:848566][1282/1192073536] CLIENT: Election thread owns egen 71
[1307872316:849634][1282/1192073536] CLIENT: Tallying VOTE1[0] (2147483647, 71)
[1307872316:849654][1282/1192073536] CLIENT: Beginning an election
[1307872316:849680][1282/1192073536] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid -1, type vote1, LSN [21][946437] nobuf
[1307872316:851403][1282/1160603968] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type vote1, LSN [21][986728]
[1307872316:851448][1282/1160603968] CLIENT: Received vote1 egen 69, egen 71
[1307872316:851470][1282/1160603968] CLIENT: Received old vote 69, egen 71, ignoring vote1
[1307872316:851481][1282/1160603968] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid 0, type alive, LSN [21][986728] nobuf
[1307872316:851538][1282/1171093824] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type master_req, LSN [0][0]
[1307872316:851558][1282/1171093824] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid 0, type alive, LSN [0][0] nobuf
[1307872316:854254][1282/1160603968] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type vote1, LSN [21][986728]
[1307872316:854275][1282/1160603968] CLIENT: Received vote1 egen 71, egen 71
[1307872316:854317][1282/1160603968] CLIENT: Tallying VOTE1[1] (0, 71)
[1307872316:854339][1282/1160603968] CLIENT: Incoming vote: (eid)0 (pri)100 ELECTABLE (gen)70 (egen)71 [21,986728]
[1307872316:854353][1282/1160603968] CLIENT: Existing vote: (eid)2147483647 (pri)100 (gen)70 (sites)2 [21,946437]
[1307872316:854369][1282/1160603968] CLIENT: Accepting new vote
[1307872316:854379][1282/1160603968] CLIENT: Phase1 election done
[1307872316:854395][1282/1160603968] CLIENT: Voting for 0
[1307872316:854407][1282/1160603968] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid 0, type vote2, LSN [0][0] nobuf
[1307872317:960344][1282/1192073536] CLIENT: After phase 2: votes 0, nvotes 1, nsites 2
[1307872317:960389][1282/1192073536] CLIENT: Election finished in 1.111809000 sec
[1307872317:960401][1282/1192073536] CLIENT: Election done; egen 72
[1307872317:960412][1282/1192073536] CLIENT: Ended election with -30974, e_th 0, egen 72, flag 0x282c, e_fl 0x0, lo_fl 0x0
Kill me !!
--- my source
on the master I run manually :
txn_rate 1
loop_rate 10
loop 1 20000
* See the file LICENSE for redistribution information.
* Copyright (c) 2001, 2010 Oracle and/or its affiliates. All rights reserved.
* $Id$
* In this application, we specify all communication via the command line. In
* a real application, we would expect that information about the other sites
* in the system would be maintained in some sort of configuration file. The
* critical part of this interface is that we assume at startup that we can
* find out
* 1) what our Berkeley DB home environment is,
* 2) what host/port we wish to listen on for connections; and
* 3) an optional list of other sites we should attempt to connect to.
* These pieces of information are expressed by the following flags.
* -h home (required; h stands for home directory)
* -l host:port (required; l stands for local)
* -C or -M (optional; start up as client or master)
* -r host:port (optional; r stands for remote; any number of these may be
* specified)
* -R host:port (optional; R stands for remote peer; only one of these may
* be specified)
* -a all|quorum (optional; a stands for ack policy)
* -b (optional; b stands for bulk)
* -n nsites (optional; number of sites in replication group; defaults to 0
* to try to dynamically compute nsites)
* -p priority (optional; defaults to 100)
* -v (optional; v stands for verbose)
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <string>
#include <sstream>
#include <sys/types.h>
#include <signal.h>
#include <db_cxx.h>
#include "RepConfigInfo.h"
#include "dbc_auto.h"
using std::cout;
using std::cin;
using std::cerr;
using std::endl;
using std::ends;
using std::flush;
using std::istream;
using std::istringstream;
using std::ostringstream;
using std::string;
using std::getline;
#include <stdio.h>
#include <readline/readline.h>
#include <readline/history.h>
#define CACHESIZE (10 * 1024 * 1024)
#define DATABASE "quote.db"
#define DATABASE2 "quote2.db"
const char *progname = "excxx_repquote";
#include <errno.h>
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#define snprintf _snprintf
#define sleep(s) Sleep(1000 * (s))
extern "C" {
extern int getopt(int, char * const *, const char *);
extern char *optarg;
typedef HANDLE thread_t;
typedef DWORD thread_exit_status_t;
#define thread_create(thrp, attr, func, arg) \
(((*(thrp) = CreateThread(NULL, 0, \
(LPTHREAD_START_ROUTINE)(func), (arg), 0, NULL)) == NULL) ? -1 : 0)
#define thread_join(thr, statusp) \
((WaitForSingleObject((thr), INFINITE) == WAIT_OBJECT_0) && \
GetExitCodeThread((thr), (LPDWORD)(statusp)) ? 0 : -1)
#else /* !_WIN32 */
#include <pthread.h>
typedef pthread_t thread_t;
typedef void* thread_exit_status_t;
#define thread_create(thrp, attr, func, arg) \
pthread_create((thrp), (attr), (func), (arg))
#define thread_join(thr, statusp) pthread_join((thr), (statusp))
#endif
// Struct used to store information in Db app_private field.
typedef struct {
bool app_finished;
bool in_client_sync;
bool is_master;
bool no_dummy_wr;
} APP_DATA;
static void log(const char *);
void checkpoint_thread (void );
void log_archive_thread (void );
void dummy_write_thread (void );
class RepQuoteExample {
public:
RepQuoteExample();
void init(RepConfigInfo* config);
void doloop();
int terminate();
static void event_callback(DbEnv* dbenv, u_int32_t which, void *info);
void print_stocks_size(Db *dbp);
private:
// disable copy constructor.
RepQuoteExample(const RepQuoteExample &);
void operator = (const RepQuoteExample &);
// internal data members.
APP_DATA app_data;
RepConfigInfo *app_config;
DbEnv cur_env;
thread_t ckp_thr;
thread_t lga_thr;
thread_t dmy_thr;
// private methods.
void print_stocks(Db *dbp);
void print_env(DbEnv *dbenv);
void prompt();
RepQuoteExample *g_runner=NULL;
RepConfigInfo *g_config=NULL;
class DbHolder {
public:
DbHolder(DbEnv env, const char _dbname) : env(env)
dbp = 0;
if (_dbname) dbname=_dbname;
else dbname=DATABASE;
~DbHolder() {
try {
close();
} catch (...) {
// Ignore: this may mean another exception is pending
bool ensure_open(bool creating) {
if (dbp)
return (true);
dbp = new Db(env, 0);
u_int32_t flags = DB_AUTO_COMMIT;
if (creating)
flags |= DB_CREATE;
try {
//dbp->open(NULL, DATABASE, NULL, DB_BTREE, flags, 0);
//dbp->open(NULL, dbname, NULL, DB_BTREE, flags, 0);
dbp->open(NULL, NULL, dbname, DB_BTREE, flags, 0);
return (true);
} catch (DbDeadlockException e) {
} catch (DbRepHandleDeadException e) {
} catch (DbException e) {
if (e.get_errno() == DB_REP_LOCKOUT) {
// Just fall through.
} else if (e.get_errno() == ENOENT && !creating) {
// Provide a bit of extra explanation.
log("Stock DB does not yet exist");
} else
throw;
// (All retryable errors fall through to here.)
log("please retry the operation");
close();
return (false);
void close() {
if (dbp) {
try {
dbp->close(0);
delete dbp;
dbp = 0;
} catch (...) {
delete dbp;
dbp = 0;
throw;
operator Db *() {
return dbp;
Db *operator->() {
return dbp;
private:
Db *dbp;
DbEnv *env;
const char *dbname;
class StringDbt : public Dbt {
public:
#define GET_STRING_OK 0
#define GET_STRING_INVALID_PARAM 1
#define GET_STRING_SMALL_BUFFER 2
#define GET_STRING_EMPTY_DATA 3
int get_string(char **buf, size_t buf_len)
size_t copy_len;
int ret = GET_STRING_OK;
if (buf == NULL) {
cerr << "Invalid input buffer to get_string" << endl;
return GET_STRING_INVALID_PARAM;
// make sure the string is null terminated.
memset(*buf, 0, buf_len);
// if there is no string, just return.
if (get_data() == NULL || get_size() == 0)
return GET_STRING_OK;
if (get_size() >= buf_len) {
ret = GET_STRING_SMALL_BUFFER;
copy_len = buf_len - 1; // save room for a terminator.
} else
copy_len = get_size();
memcpy(*buf, get_data(), copy_len);
return ret;
size_t get_string_length()
if (get_size() == 0)
return 0;
return strlen((char *)get_data());
void set_string(char *string)
set_data(string);
set_size((u_int32_t)strlen(string));
StringDbt(char *string) :
Dbt(string, (u_int32_t)strlen(string)) {};
StringDbt() : Dbt() {};
~StringDbt() {};
// Don't add extra data to this sub-class since we want it to remain
// compatible with Dbt objects created internally by Berkeley DB.
Db *g_repquote=NULL;
RepQuoteExample::RepQuoteExample() : app_config(0), cur_env(0) {
app_data.app_finished = 0;
app_data.in_client_sync = 0;
app_data.is_master = 0; // assume I start out as client
app_data.no_dummy_wr = 0 ; //prevent to run dummy write
int (*old_rep_process_message)
__P((DB_ENV *, DBT *, DBT *, int, DB_LSN *));
int my_rep_process_message __P((DB_ENV arg1, DBT arg2, DBT arg3, int arg4, DB_LSN arg5))
printf("EZ->>> my_rep_process_message:%p\n",arg5);
old_rep_process_message(arg1,arg2,arg3,arg4,arg5);
void RepQuoteExample::init(RepConfigInfo *config) {
app_config = config;
cur_env.set_app_private(&app_data);
cur_env.set_errfile(stderr);
app_data.no_dummy_wr=config->no_dummy_wr;
if (app_data.no_dummy_wr)
printf("No dummy !!!\n");
//EZ->cur_env.set_errpfx(progname);
cur_env.set_event_notify(event_callback);
// Configure bulk transfer to send groups of records to clients
// in a single network transfer. This is useful for master sites
// and clients participating in client-to-client synchronization.
if (app_config->bulk)
cur_env.rep_set_config(DB_REP_CONF_BULK, 1);
// Set the total number of sites in the replication group.
// This is used by repmgr internal election processing.
if (app_config->totalsites > 0)
cur_env.rep_set_nsites(app_config->totalsites);
// Turn on debugging and informational output if requested.
if (app_config->verbose)
cur_env.set_verbose(DB_VERB_REPLICATION, 1);
cur_env.set_verbose(DB_VERB_REPMGR_MISC, 1);
cur_env.set_verbose(DB_VERB_RECOVERY, 1);
cur_env.set_verbose(DB_VERB_REPLICATION, 1);
cur_env.set_verbose(DB_VERB_REP_ELECT, 1);
cur_env.set_verbose(DB_VERB_REP_LEASE, 1);
cur_env.set_verbose(DB_VERB_REP_SYNC, 1);
cur_env.set_verbose(DB_VERB_REPMGR_MISC, 1);
// Set replication group election priority for this environment.
// An election first selects the site with the most recent log
// records as the new master. If multiple sites have the most
// recent log records, the site with the highest priority value
// is selected as master.
cur_env.rep_set_priority(app_config->priority);
// Set the policy that determines how master and client sites
// handle acknowledgement of replication messages needed for
// permanent records. The default policy of "quorum" requires only
// a quorum of electable peers sufficient to ensure a permanent
// record remains durable if an election is held. The "all" option
// requires all clients to acknowledge a permanent replication
// message instead.
cur_env.repmgr_set_ack_policy(app_config->ack_policy);
// Set the threshold for the minimum and maximum time the client
// waits before requesting retransmission of a missing message.
// Base these values on the performance and load characteristics
// of the master and client host platforms as well as the round
// trip message time.
cur_env.rep_set_request(20000, 500000);
// Configure deadlock detection to ensure that any deadlocks
// are broken by having one of the conflicting lock requests
// rejected. DB_LOCK_DEFAULT uses the lock policy specified
// at environment creation time or DB_LOCK_RANDOM if none was
// specified.
cur_env.set_lk_detect(DB_LOCK_DEFAULT);
// The following base replication features may also be useful to your
// application. See Berkeley DB documentation for more details.
// - Master leases: Provide stricter consistency for data reads
// on a master site.
// - Timeouts: Customize the amount of time Berkeley DB waits
// for such things as an election to be concluded or a master
// lease to be granted.
// - Delayed client synchronization: Manage the master site's
// resources by spreading out resource-intensive client
// synchronizations.
// - Blocked client operations: Return immediately with an error
// instead of waiting indefinitely if a client operation is
// blocked by an ongoing client synchronization.
cur_env.repmgr_set_local_site(app_config->this_host.host,
app_config->this_host.port, 0);
for ( REP_HOST_INFO *cur = app_config->other_hosts; cur != NULL;
cur = cur->next) {
cur_env.repmgr_add_remote_site(cur->host, cur->port,
NULL, cur->peer ? DB_REPMGR_PEER : 0);
// Configure heartbeat timeouts so that repmgr monitors the
// health of the TCP connection. Master sites broadcast a heartbeat
// at the frequency specified by the DB_REP_HEARTBEAT_SEND timeout.
// Client sites wait for message activity the length of the
// DB_REP_HEARTBEAT_MONITOR timeout before concluding that the
// connection to the master is lost. The DB_REP_HEARTBEAT_MONITOR
// timeout should be longer than the DB_REP_HEARTBEAT_SEND timeout.
cur_env.rep_set_timeout(DB_REP_HEARTBEAT_SEND, 5000000);
cur_env.rep_set_timeout(DB_REP_HEARTBEAT_MONITOR, 10000000);
// The following repmgr features may also be useful to your
// application. See Berkeley DB documentation for more details.
// - Two-site strict majority rule - In a two-site replication
// group, require both sites to be available to elect a new
// master.
// - Timeouts - Customize the amount of time repmgr waits
// for such things as waiting for acknowledgements or attempting
// to reconnect to other sites.
// - Site list - return a list of sites currently known to repmgr.
// We can now open our environment, although we're not ready to
// begin replicating. However, we want to have a dbenv around
// so that we can send it into any of our message handlers.
cur_env.set_cachesize(0, CACHESIZE, 0);
cur_env.set_flags(DB_REP_PERMANENT, 1);
//cur_env.set_flags(DB_TXN_WRITE_NOSYNC, 1);
/* u_int32_t maxlocks=300000;
if (maxlocks != 0)
cur_env.set_lk_max_locks(maxlocks);
u_int32_t maxlocks_o=300000;
if (maxlocks_o != 0)
cur_env.set_lk_max_objects(maxlocks_o);
u_int32_t maxmutex=300000;
if (maxmutex != 0)
cur_env.mutex_set_max(maxmutex);
DbEnv *m_env=&cur_env;
m_env->set_flags(DB_TXN_NOSYNC, 1);
m_env->set_lk_max_lockers(60000);
m_env->set_lk_max_objects(60000);
m_env->set_lk_max_locks(60000);
m_env->set_tx_max(60000);
//m_env->repmgr_set_ack_policy(DB_REPMGR_ACKS_NONE);
m_env->rep_set_timeout(DB_REP_ACK_TIMEOUT, 50 * 1000); //50ms
m_env->rep_set_timeout(DB_REP_CHECKPOINT_DELAY, 0);
//m_env->rep_set_timeout(DB_REP_CONNECTION_RETRY, 30 * 1000 * 1000); // 30 seconds
m_env->rep_set_timeout(DB_REP_ELECTION_TIMEOUT, 1 * 1000 * 1000); // 5 seconds
m_env->rep_set_timeout(DB_REP_FULL_ELECTION_TIMEOUT, 5 * 1000 * 1000); // 5 seconds
m_env->rep_set_timeout(DB_REP_CONNECTION_RETRY, 5 * 1000 * 1000);
//m_env->rep_set_timeout(DB_REP_ELECTION_RETRY, 10 * 1000 * 1000); //10 seconds
//m_env->rep_set_timeout(DB_REP_HEARTBEAT_MONITOR, 80 * 1000 * 1000); //80 seconds
//m_env->rep_set_timeout(DB_REP_HEARTBEAT_SEND, 500 * 1000); //500 milli seconds
//The minimum number of microseconds a client waits before requesting retransmission
u_int32_t rep_req_min = 40000; //40 000 microsec = 40 mili
//The maximum number of microseconds a client waits before requesting retransmission
u_int32_t rep_req_max = 1280000;// 1 280 000 microsec = 1.28 sec
u_int32_t rep_limit_gbytes = 0;
u_int32_t rep_limit_bytes = 100 * 1024 * 1024; // 100MB
m_env->rep_set_request(rep_req_min, rep_req_max);
m_env->rep_set_limit(rep_limit_gbytes, rep_limit_bytes);
cur_env.open(app_config->home, DB_CREATE | DB_RECOVER |
DB_THREAD | DB_INIT_REP | DB_INIT_LOCK | DB_INIT_LOG |
DB_INIT_MPOOL | DB_INIT_TXN , 0);
//keep old function for chain
//old_rep_process_message=cur_env.get_DB_ENV()->rep_process_message;
//derouting
//cur_env.get_DB_ENV()->rep_process_message=my_rep_process_message;
/*int _i;
cur_env.log_get_config(DB_LOG_DIRECT, &_i);printf ("DB_LOG_DIRECT = %d\n",_i);
cur_env.log_get_config(DB_LOG_DSYNC, &_i);printf ("DB_LOG_DSYNC = %d\n",_i);
cur_env.log_get_config(DB_LOG_AUTO_REMOVE, &_i);printf ("DB_LOG_AUTO_REMOVE = %d\n",_i);
cur_env.log_get_config(DB_LOG_IN_MEMORY, &_i);printf ("DB_LOG_IN_MEMORY = %d\n",_i);
cur_env.log_get_config(DB_LOG_ZERO,&_i);printf ("DB_LOG_ZERO = %d\n",_i);
// Start checkpoint and log archive support threads.
(void)thread_create(&ckp_thr, NULL, checkpoint_thread, &cur_env);
(void)thread_create(&lga_thr, NULL, log_archive_thread, &cur_env);
(void)thread_create(&dmy_thr, NULL, dummy_write_thread, &cur_env);
cur_env.repmgr_start(3, app_config->start_policy);
}int RepQuoteExample::terminate() {
try {
// Wait for checkpoint and log archive threads to finish.
// Windows does not allow NULL pointer for exit code variable.
thread_exit_status_t exstat;
(void)thread_join(lga_thr, &exstat);
(void)thread_join(ckp_thr, &exstat);
(void)thread_join(dmy_thr, &exstat);
// We have used the DB_TXN_NOSYNC environment flag for
// improved performance without the usual sacrifice of
// transactional durability, as discussed in the
// "Transactional guarantees" page of the Reference
// Guide: if one replication site crashes, we can
// expect the data to exist at another site. However,
// in case we shut down all sites gracefully, we push
// out the end of the log here so that the most
// recent transactions don't mysteriously disappear.
cur_env.log_flush(NULL);
cur_env.close(0);
} catch (DbException dbe) {
cout << "error closing environment: " << dbe.what() << endl;
return 0;
void RepQuoteExample::prompt() {
cout << "QUOTESERVER";
if (!app_data.is_master)
cout << "(read-only)";
cout << "> " << flush;
void log(const char *msg) {
time_t currentTime;
// get and print the current time
time (¤tTime); // fill now with the current time
char buff[255];
strncpy(buff,ctime(¤tTime),sizeof(buff));
char *p;
for(p =buff ; *p != '\n'; p++);
*p = '\0';
cerr << buff << " - " << msg << endl;
// Simple command-line user interface:
// - enter "<stock symbol> <price>" to insert or update a record in the
// database;
// - just press Return (i.e., blank input line) to print out the contents of
// the database;
// - enter "quit" or "exit" to quit.
void RepQuoteExample::doloop() {
DbHolder dbh1(&cur_env,DATABASE);
DbHolder dbh2(&cur_env,DATABASE2);
DbHolder *dbh=&dbh1;
DbTxn *txn;
string input;
bool truncate = false;
char *c;
using_history();
g_repquote=*dbh;
int loop_rate = 0;
int txn_rate = 500;
while (prompt(), /*getline(cin, input)*/c=readline(NULL)) {
input=std::string(c);
add_history(c);
free(c);
int start_loop = 0;
int end_loop = 0;
int start_loop_d = 0;
int end_loop_d = 0;
istringstream is(input);
string token1, token2, token3;
truncate = false;
start_loop = 0;
end_loop = 0;
// Read 0, 1 or 2 tokens from the input.
int count = 0;
if (is >> token1) {
count++;
if (is >> token2)
count++;
if (is >> token3)
count++;
if (count == 1) {
if (token1 == "truncate" ) {
truncate = true;
else if (token1 == "env" ){
print_env(&cur_env);
continue;
else if (token1 == "verbose" ) {
app_config->verbose = !app_config->verbose;
if (app_config->verbose)
cur_env.set_verbose(DB_VERB_REPLICATION, 1);
cur_env.set_verbose(DB_VERB_REPMGR_MISC, 1);
cur_env.set_verbose(DB_VERB_RECOVERY, 1);
cur_env.set_verbose(DB_VERB_REP_ELECT, 1);
cur_env.set_verbose(DB_VERB_REP_LEASE, 1);
cur_env.set_verbose(DB_VERB_REP_SYNC, 1);
cur_env.set_verbose(DB_VERB_REPMGR_MISC, 1);
log("verbose is on");
else
cur_env.set_verbose(DB_VERB_REPLICATION, 0);
cur_env.set_verbose(DB_VERB_REPMGR_MISC, 0);
cur_env.set_verbose(DB_VERB_RECOVERY, 0);
cur_env.set_verbose(DB_VERB_REP_ELECT, 0);
cur_env.set_verbose(DB_VERB_REP_LEASE, 0);
cur_env.set_verbose(DB_VERB_REP_SYNC, 0);
cur_env.set_verbose(DB_VERB_REPMGR_MISC, 0);
log("verbose is off");
continue;
else if (token1 == "print" ) {
print_stocks(*dbh);
count = 0;
else if (token1 == "db1" ) {
dbh=&dbh1;
g_repquote=*dbh;
log( "switch to Db1");
count = 0;
else if (token1 == "db2" ) {
dbh=&dbh2;
g_repquote=*dbh;
log( "switch to Db2");
count = 0;
else if (token1 == "exit" || token1 == "quit") {
app_data.app_finished = 1;
break;
} else {
log("Format: <stock> <price>");
continue;
else if (count == 2)
if (token1 == "loop_rate" ){
loop_rate = atoi(token2.c_str());
continue;
if (token1 == "txn_rate" ){
txn_rate = atoi(token2.c_str());
continue;
else if (count == 3)
if (token1 == "loop" ) {
start_loop = atoi(token2.c_str());
end_loop = start_loop + atoi(token3.c_str());
if (token1 == "delete" ) {
start_loop_d = atoi(token2.c_str());
end_loop_d = start_loop_d + atoi(token3.c_str());
// Here we know count is either 0 or 2, so we're about to try a
// DB operation.
// Open database with DB_CREATE only if this is a master
// database. A client database uses polling to attempt
// to open the database without DB_CREATE until it is
// successful.
// This DB_CREATE polling logic can be simplified under
// some circumstances. For example, if the application can
// be sure a database is already there, it would never need
// to open it with DB_CREATE.
if (!dbh->ensure_open(app_data.is_master))
continue;
try {
if (count == 0)
if (app_data.in_client_sync)
log( "Cannot read data during client initialization - please try again.");
else
print_stocks_size(*dbh);
else if (!app_data.is_master)
log("Can't update at client");
else {
if (truncate)
u_int32_t no_remove;
txn = NULL;
cur_env.txn_begin(NULL, &txn, DB_TXN_NOWAIT);
try
(*dbh)->truncate(txn, &no_remove, 0);
// commit
txn->commit(0);
txn = NULL;
} catch (DbException &e) {
std::cout << "Error on txn commit: " << e.what() << std::endl;
// } catch (DbDeadlockException &) {
if (txn != NULL)
(void)txn->abort();
// std::cout << "Error on txn commit: " << std::endl;
else if (start_loop)
int j=0;
for (int i=start_loop; i<=end_loop; i=i+txn_rate)
//transaction begin
txn = NULL;
cur_env.txn_begin(NULL, &txn, 0);
for (j=i; j<=end_loop && j<=(i+txn_rate); j++)
Dbt key, value;
std::string key1, value1;
std::stringstream sstrm;
sstrm << "key" << j << ends;
key1 = sstrm.str();
key.set_data((void *)key1.c_str());
key.set_size((u_int32_t)strlen(key1.c_str()));
sstrm.str("");
int payload = rand() + j;
sstrm << "price" << payload << ends;
value1 = sstrm.str();
value.set_data((void *)value1.c_str());
value.set_size((u_int32_t)strlen(value1.c_str()));
// Perform the database put
(*dbh)->put(txn, &key, &value, 0);
printf("Kill me !!\n");
kill(getpid(),-9);
exit(0);
try
// commit
txn->commit(0);
txn = NULL;
} catch (DbException &e) {
std::cout << "Error on txn commit: " << e.what() << std::endl;
if (loop_rate>0)
usleep(txn_rate * 1000 * 1000 / loop_rate);
else if (start_loop_d)
int j=0;
for (int i=start_loop_d; i<=end_loop_d; i=i+100)
//transaction begin
txn = NULL;
cur_env.txn_begin(NULL, &txn, 0);
for (j=i; j<=end_loop_d && j<=(i+100); j++)
Dbt key, value;
std::string key1, value1;
std::stringstream sstrm;
sstrm << "key" << j << ends;
key1 = sstrm.str();
key.set_data((void *)key1.c_str());
key.set_size((u_int32_t)strlen(key1.c_str()));
// Perform the database put
(*dbh)->del(txn, &key, 0);
try
// commit
txn->commit(0);
txn = NULL;
} catch (DbException &e) {
std::cout << "Error on txn commit: " << e.what() << std::endl;
else
const char *symbol = token1.c_str();
StringDbt key(const_cast<char*>(symbol));
const char *price = token2.c_str();
StringDbt data(const_cast<char*>(price));
(*dbh)->put(NULL, &key, &data, 0);
} catch (DbDeadlockException e) {
log("please retry the operation");
dbh->close();
} catch (DbRepHandleDeadException e) {
log("please retry the operation");
dbh->close();
} catch (DbException e) {
if (e.get_errno() == DB_REP_LOCKOUT) {
log("please retry the operation");
dbh->close();
} else
throw;
dbh->close();
void RepQuoteExample::event_callback(DbEnv* dbenv, u_int32_t which, void *info)
static char buf[256];
APP_DATA app = (APP_DATA)dbenv->get_app_private();
info = NULL; /* Currently unused. */
switch (which) {
case DB_EVENT_REP_CLIENT:
app->is_master = 0;
app->in_client_sync = 1;
sprintf(buf,"%s - %s",progname,"CLIENT");
//EZ->dbenv->set_errpfx(buf);
log("DB_EVENT_REP_CLIENT.");
break;
case DB_EVENT_REP_MASTER:
app->is_master = 1;
app->in_client_sync = 0;
sprintf(buf,"%s - %s",progname,"MASTER");
//EZ->dbenv->set_errpfx(buf);
log("DB_EVENT_REP_MASTER.");
break;
case DB_EVENT_REP_NEWMASTER:
log("DB_EVENT_REP_NEWMASTER.");
app->in_client_sync = 1;
break;
case DB_EVENT_REP_PERM_FAILED:
// Did not get enough acks to guarantee transaction
// durability based on the configured ack policy. This
// transaction will be flushed to the master site's
// local disk storage for durability.
log("DB_EVENT_REP_PERM_FAILED.");
log("Insufficient acknowledgements to guarantee transaction durability.");
break;
case DB_EVENT_REP_STARTUPDONE:
app->in_client_sync = 0;
log("DB_EVENT_REP_STARTUPDONE.");
break;
case DB_EVENT_REP_ELECTION_FAILED:
log("DB_EVENT_REP_ELECTION_FAILED.");
//g_runner->init(g_config);
printf("Kill me !!\n");
kill(getpid(),-9);
exit(0);
break;
case DB_EVENT_REP_DUPMASTER:
log("DB_EVENT_REP_DUPMASTER.");
break;
default:
dbenv->errx("ignoring event %d", which);
void RepQuoteExample::print_stocks_size(Db *dbp) {
DB_BTREE_STAT *statp;
dbp->stat(NULL, &statp, 0);
log("db_stat");
cout << "***************************************** >>>>>>>>>>> : database contains " << (u_long)statp->bt_ndata << " records\n";
void RepQuoteExample::print_env(DbEnv *dbenv) {
dbenv->stat_print(DB_STAT_ALL);
void RepQuoteExample::print_stocks(Db *dbp) {
StringDbt key, data;
#define MAXKEYSIZE 10
#define MAXDATASIZE 20
char keybuf[MAXKEYSIZE + 1], databuf[MAXDATASIZE + 1];
char kbuf, dbuf;
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
kbuf = keybuf;
dbuf = databuf;
DbcAuto dbc(dbp, 0, 0);
cout << "\tSymbol\tPrice" << endl
<< "\t======\t=====" << endl;
int no_records =0;
for (int ret = dbc->get(&key, &data, DB_FIRST);
ret == 0;
ret = dbc->get(&key, &data, DB_NEXT)) {
key.get_string(&kbuf, MAXKEYSIZE);
data.get_string(&dbuf, MAXDATASIZE);
no_records++;
cout << "\t" << keybuf << "\t" << databuf << endl;
cout << "********************** NO Records " << no_records << endl;
cout << endl << flush;
dbc.close();
static void usage() {
cerr << "usage: " << progname << " -h home -l host:port [-CM]"
<< "[-r host:port][-R host:port]" << endl
<< " [-a all|quorum][-b][-n nsites][-p priority][-v]" << endl;
cerr << "\t -h home (required; h stands for home directory)" << endl
<< "\t -l host:port (required; l stands for local)" << endl
<< "\t -C or -M (optional; start up as client or master)" << endl
<< "\t -r host:port (optional; r stands for remote; any "
<< "number of these" << endl
<< "\t may be specified)" << endl
<< "\t -R host:port (optional; R stands for remote peer; only "
<< "one of" << endl
<< "\t these may be specified)" << endl
<< "\t -a all|quorum (optional; a stands for ack policy)" << endl
<< "\t -b (optional; b stands for bulk)" << endl
<< "\t -n nsites (optional; number of sites in replication "
<< "group; defaults " << endl
<< "\t to 0 to try to dynamically compute nsites)" << endl
<< "\t -p priority (optional; defaults to 100)" << endl
<< "\t -v (optional; v stands for verbose)" << endl;
exit(EXIT_FAILURE);
int main(int argc, char **argv) {
RepConfigInfo config;
char ch, portstr, tmphost;
int tmpport;
bool tmppeer;
config.no_dummy_wr = false;
// Extract the command line parameters
while ((ch = getopt(argc, argv, "E:a:bCh:l:Mn:p:R:r:vw")) != EOF) {
tmppeer = false;
switch (ch) {
case 'a':
if (strncmp(optarg, "all", 3) == 0)
config.ack_policy = DB_REPMGR_ACKS_ALL;
else if (strncmp(optarg, "quorum", 6) != 0)
usage();
break;
case 'b':
config.bulk = true;
break;
case 'C':
config.start_policy = DB_REP_CLIENT;
break;
case 'E':
config.start_policy = DB_REP_ELECTION;
break;
case 'h':
config.home = optarg;
break;
case 'l':
config.this_host.host = strtok(optarg, ":");
if ((portstr = strtok(NULL, ":")) == NULL) {
cerr << "Bad host specification." << endl;
usage();
config.this_host.port = (unsigned short)atoi(portstr);
config.got_listen_address = true;
break;
case 'M':
config.start_policy = DB_REP_MASTER;
break;
case 'n':
config.totalsites = atoi(optarg);
break;
case 'p':
config.priority = atoi(optarg);
break;
case 'R':
tmppeer = true; // FALLTHROUGH
case 'r':
tmphost = strtok(optarg, ":");
if ((portstr = strtok(NULL, ":")) == NULL) {
cerr << "Bad host specification." << endl;
usage();
tmpport = (unsigned short)atoi(portstr);
config.addOtherHost(tmphost, tmpport, tmppeer);
break;
case 'v':
config.verbose = true;
break;
case 'w':
config.no_dummy_wr = true;
//config.priority = 2;
break;
case '?':
default:
usage();
// Error check command line.
if ((!config.got_listen_address) || config.home == NULL)
usage();
RepQuoteExample runner;
g_runner=&runner;
g_config=&config;
try {
runner.init(&config);
runner.doloop();
} catch (DbException dbe) {
cerr << "Caught an exception during initialization or"
<< " processing: " << dbe.what() << endl;
runner.terminate();
return 0;
// This is a very simple thread that performs checkpoints at a fixed
// time interval. For a master site, the time interval is one minute
// plus the duration of the checkpoint_delay timeout (30 seconds by
// default.) For a client site, the time interval is one minute.
void checkpoint_thread(void args)
DbEnv *env;
APP_DATA *app;
int i, ret;
env = (DbEnv *)args;
app = (APP_DATA *)env->get_app_private();
for (;;) {
// Wait for one minute, polling once per second to see if
// application has finished. When application has finished,
// terminate this thread.
for (i = 0; i < 60; i++) {
sleep(1);
if (app->app_finished == 1)
return ((void *)EXIT_SUCCESS);
// Perform a checkpoint.
// original line
if ((ret = env->txn_checkpoint(0, 0, 0)) != 0) {
//if ((ret = env->txn_checkpoint(0, 0, DB_FORCE)) != 0) {
env->err(ret, "Could not perform checkpoint.\n");
return ((void *)EXIT_FAILURE);
// This is a simple log archive thread. Once per minute, it removes all but
// the most recent 3 logs that are safe to remove according to a call to
// DBENV->log_archive().
// Log cleanup is needed to conserve disk space, but aggressive log cleanup
// can cause more frequent client initializations if a client lags too far
// behind the current master. This can happen in the event of a slow client,
// a network partition, or a new master that has not kept as many logs as the
// previous master.
// The approach in this routine balances the need to mitigate against a
// lagging client by keeping a few more of the most recent unneeded logs
// with the need to conserve disk space by regularly cleaning up log files.
// Use of automatic log removal (DBENV->log_set_config() DB_LOG_AUTO_REMOVE
// flag) is not recommended for replication due to the risk of frequent
// client initializations.
void log_archive_thread(void args)
DbEnv *env;
APP_DATA *app;
char **begin, **list;
int i, listlen, logs_to_keep, minlog, ret;
env = (DbEnv *)args;
app = (APP_DATA *)env->get_app_private();
logs_to_keep = 3;
for (;;) {
// Wait for one minute, polling once per second to see if
// application has finished. When application has finished,
// terminate this thread.
for (i = 0; i < 60; i++) {
sleep(1);
if (app->app_finished == 1)
return ((void *)EXIT_SUCCESS);
// Get the list of unneeded log files.
if ((ret = env->log_archive(&list, DB_ARCH_ABS)) != 0) {
env->err(ret, "Could not get log archive list.");
return ((void *)EXIT_FAILURE);
if (list != NULL) {
listlen = 0;
// Get the number of logs in the list.
for (begin = list; *begin != NULL; begin++, listlen++);
// Remove all but the logs_to_keep most recent
// unneeded log files.
minlog = listlen - logs_to_keep;
for (begin = list, i= 0; i < minlog; list++, i++) {
if ((ret = unlink(*list)) != 0) {
env->err(ret,
"logclean: remove %s", *list);
env->errx(
"logclean: Error remove %s", *list);
free(begin);
return ((void *)EXIT_FAILURE);
free(begin);
#define DATABASE_DUMMY "dummy.db"
void create_dummy_db(DB_ENV env, DB *dbp)
DB_ENV *dbenv=env;
int ret;
u_int32_t db_flags;
if ((ret = db_create(dbp, dbenv, 0)) != 0)
dbenv->err(dbenv, ret, "create_dummy_db: db_create");
db_flags = DB_AUTO_COMMIT | DB_CREATE;
//if ((ret = (*dbp)->open(*dbp,NULL, DATABASE, NULL, DB_BTREE, db_flags, 0)) != 0)
if ((ret = (*dbp)->open(*dbp,NULL, NULL, DATABASE_DUMMY, DB_BTREE, db_flags, 0)) != 0)
dbenv->err(dbenv, ret, "create_dummy_db: DB->open");
void reopen_dummy_db(DB_ENV env, DB *dbp)
DB_ENV *dbenv=env;
int ret;
u_int32_t db_flags;
if ((ret = db_create(dbp, dbenv, 0)) != 0)
dbenv->err(dbenv, ret, "create_dummy_db: db_create");
db_flags = DB_AUTO_COMMIT | DB_CREATE;
//if ((ret = (*dbp)->open(*dbp,NULL, DATABASE, NULL, DB_BTREE, db_flags, 0)) != 0)
if ((ret = (*dbp)->open(*dbp,NULL, NULL, DATABASE_DUMMY, DB_BTREE, db_flags, 0)) != 0)
dbenv->err(dbenv, ret, "reopen_dummy_db: DB->open");
void perform_db_operation(DB_ENV env, DB *dbp, bool bRead)
//main loop
//DB *dbp=NULL;
DB_ENV *dbenv=env;
int ret;
u_int32_t db_flags;
DBT key, data;
char buf[20]="dummy", *rbuf;
rbuf=buf;
if (*dbp == NULL)
create_dummy_db(dbenv, dbp);
if (! bRead)
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
key.data = buf;
key.size = (u_int32_t)strlen(buf);
data.data = rbuf;
data.size = (u_int32_t)strlen(rbuf);
if ((ret = (*dbp)->put(*dbp, NULL, &key, &data, 0)) != 0)
if (ret == DB_REP_HANDLE_DEAD)
//create_dummy_db(dbenv, dbp);
reopen_dummy_db(dbenv, dbp);
(*dbp)->err(*dbp, ret, "DB->put :");
else
if (ret != DB_KEYEXIST)
(*dbp)->err(*dbp, ret, "perform_db_operation: DB->put");
else
DB_BTREE_STAT *statp;
(*dbp)->stat(*dbp,NULL, &statp, 0);
std::cout<<"dbp read stats: key#"<< statp->bt_nkeys <<std::endl;
void dummy_write_thread(void args)
DbEnv *env;
APP_DATA *app;
char **begin, **list;
int i, listlen, logs_to_keep, minlog, ret;
DB *m_dbp; // a pointer
env = (DbEnv *)args;
app = (APP_DATA *)env->get_app_private();
logs_to_keep = 3;
for (;;) {
if (! app->no_dummy_wr)
if (app->is_master)
perform_db_operation(env->get_DB_ENV(),&m_dbp,false);
//env->txn_checkpoint(0, 0, DB_FORCE);
usleep(1 * 1000 * 1000);
else
if (app->is_master)
//DB *db_quote=g_repquote->get_DB();
//perform_db_operation(env->get_DB_ENV(),&db_quote,true);
//if (g_repquote)
// g_runner->print_stocks_size(g_repquote);
//env->txn_checkpoint(0, 0, DB_FORCE);
//perform_db_operation(env->get_DB_ENV(),&m_dbp,false);
env->rep_flush();
usleep(4 * 1000 * 1000);
my script to simulate the split brain
#!/bin/sh
[ -z "$node1" ] && node1=10.10.32.121
[ -z "$node2" ] && node2=10.10.32.91
trap myend 0 1 2 3 6 9 14 15
myend()
echo "Receive signal to stop test..."
un_split_brain
echo "done"
exit 1
split_brain()
echo -n "Split-Brain at node $node..."
snmpset -m ALL -v 2c -c svil 10.10.0.100 ifAdminStatus.41 i 2 >/dev/null 2>&1
echo "done"
un_split_brain()
echo -n "Undo Split-Brain at node $node..."
snmpset -m ALL -v 2c -c svil 10.10.0.100 ifAdminStatus.41 i 1 >/dev/null 2>&1
echo "done"
is_slave()
local r=$(ssh root@$1 "tail -2 /tmp/BDB.log" | grep -c CLIENT)
[ $r -gt 1 ] && ret=1 || ret=0
return $ret
is_master()
local r=$(ssh root@$1 "tail -2 /tmp/BDB.log" | grep -c MASTER)
[ $r -gt 1 ] && ret=1 || ret=0
return $ret
wait_for_master()
echo -n "Waiting for MASTER at node $node ... "
is_master $node
r=$?
while ( [ ! $r -eq 1 ] )
do
usleep 500000
is_master $node
r=$?
echo -n "."
done
echo "done"
wait_for_slave()
local r
local tm
tm=0
echo -n "Waiting for SLAVE at node $node ... "
is_slave $node
r=$?
while ( [ ! $r -eq 1 ] )
do
usleep 500000
is_slave $node
r=$?
echo -n "."
tm=$((tm+1))
[ $tm -gt 120 ] && break
done
[ $tm -gt 120 ] && ret=0 || ret=1
echo "done"
return $ret
run_test_split_brain()
local nt
nt=1
nfails=0
x=4
[ -z "$1" ] && node=$node2
while ((1))
do
printf "*************** TEST [%02d] ********************\n" $nt
split_brain
wait_for_master
x=$((RANDOM%9))
echo -n " waiting $x sec ..."
sleep $x
echo "done"
un_split_brain
wait_for_slave
r=$?
[ ! $r -eq 1 ] && echo "`date` - test [$nt] - fails ..." || echo "`date` - test [$nt] - OK ."
[ ! $r -eq 1 ] && nfails=$((nfails+1))
perc_failure=$(echo "100.0 - $nfails / $nt * 100.0" | bc -l)
echo "************************************************ [% Success test $perc_failure % ]"
nt=$((nt+1))
x=$((RANDOM%9))
echo -n " waiting $x sec ..."
sleep $x
done
run_test_split_brain
here is the makefile to run to two environments
i run:
- make run
and in another window sh test_split_brain.sh
node1?=10.10.32.121
node2?=10.10.32.91
nsite?=2
debug?=0
all: RepQuoteExampleEric install
RepConfigInfo.o: RepConfigInfo.cpp RepConfigInfo.h
g++ -I/usr/local/BerkeleyDB.5.1/include/ -g -O0 -c RepConfigInfo.cpp -o RepConfigInfo.o
RepQuoteExampleEric: RepQuoteExampleEric.cpp RepConfigInfo.o
g++ -I/usr/local/BerkeleyDB.5.1/include/ -g -O0 RepQuoteExampleEric.cpp RepConfigInfo.o -o RepQuoteExampleEric -L /usr/local/BerkeleyDB.5.1/lib/ -lreadline -lcurses -ldb_cxx
kill:
-ssh -X root@$(node1) "killall -9 /root/RepQuoteExampleEric"
-ssh -X root@$(node2) "killall -9 /root/RepQuoteExampleEric"
run: RepQuoteExampleEric kill install clean_env
ssh -X root@$(node1) "xterm -geom 100x20+100+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/RepQuoteExampleEric -h /opt/bdb/ -l 2.0.0.110:12345 -r 2.0.0.210:12345 -a quorum -b -n $(nsite) -v | tee /tmp/BDB.log\"" &
ssh -X root@$(node2) "xterm -geom 100x20+800+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/RepQuoteExampleEric -h /opt/bdb/ -l 2.0.0.210:12345 -r 2.0.0.110:12345 -a quorum -b -n $(nsite) -v -w | tee /tmp/BDB.log\"" &
run_node2: clean_env2
ssh -X root@$(node2) "xterm -geom 100x20+800+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/RepQuoteExampleEric -h /opt/bdb/ -l 2.0.0.210:12345 -r 2.0.0.110:12345 -a quorum -b -n $(nsite) -v -w | tee /tmp/BDB.log\"" &
debug_node2: clean_env2
ssh -X root@$(node2) "xterm -geom 100x20+800+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/RepQuoteExampleEric -h /opt/bdb/ -l 2.0.0.210:12345 -r 2.0.0.110:12345 -a quorum -b -n $(nsite) -v -w | tee /tmp/BDB.log\"" &
sleep 3
ssh -X root@$(node2) /sbin/pidof RepQuoteExampleEric >/tmp/pid
ssh -X root@$(node2) ~/kdbg /root/db-5.1.19/examples/cxx/excxx_repquote/RepQuoteExampleEric -p `cat /tmp/pid`
run_debug_node1: RepQuoteExampleEric kill install clean_env
ssh -X root@$(node1) "xterm -geom 100x20+100+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/kdbg /root/RepQuoteExampleEric\" " &
ssh -X root@$(node2) "xterm -geom 100x20+800+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/RepQuoteExampleEric -h /opt/bdb/ -l 2.0.0.210:12345 -r 2.0.0.110:12345 -a quorum -b -n $(nsite) -v\"" &
run_debug_node2: RepQuoteExampleEric kill install clean_env
ssh -X root@$(node1) "xterm -geom 100x20+100+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/RepQuoteExampleEric -h /opt/bdb/ -l 2.0.0.110:12345 -r 2.0.0.210:12345 -a quorum -b -n $(nsite) -v\" " &
ssh -X root@$(node2) "xterm -geom 100x20+800+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/kdbg /root/RepQuoteExampleEric\"" &
install: RepQuoteExampleEric
scp RepQuoteExampleEric root@$(node1):~
scp RepQuoteExampleEric root@$(node2):~
clean_env: clean_env1 clean_env2
clean_env1:
ssh -X root@$(node1) rm -rf /opt/bdb/*
clean_env2:
ssh -X root@$(node2) rm -rf /opt/bdb/* -
How to call a sequence in a new thread from C++ dll
Here is what I am trying to do:
I implemented a dll that monitors network traffic, and it also supports message handlers that can be triggered when a specific message has been received. Essentially the receipt of a message is like an event causing additional code to be executed. What I need to do is have the message handler in the dll call/execute a sequence (either is the same sequence file that originally called the dll, or in a different sequence file). Also I want the sequence to be executed within the same execution object for the purpose of result collection and report generation. I am expecting the dll to have to launch a new thread to call a sequence because of the asynchronous nature of the message received event.
There are easier ways to achieve the same result, but one of my goals is to make it easy for a test developer to configure a message handler, by having only one step in their sequence to configure the message handler. I want the rest to be transparent to the user.
I am unsure about how to implement this feature, so I am asking for any examples, ideas, comments before I start trying things out.Assuming that I understand your question correctly, it would seem to be the best way to do this would be to pass the Execution object to the DLL (either through a direct pass of the Execution object or passing the sequence context, from which you can get the Execution). Then simply call Execution.NewThread, specifying the SequenceFile object (accessible from Engine.GetSequenceFileEx) and then passing the Thread object out as an output. Your sequence file in which your DLL is called could then simply have a Wait step which is configured to wait on that Thread object. What happens in this case is that the results are collected for that thread (which is being executed asynchronously) and returned as the results for the Wait step.
Although you are probably not using LabVIEW, I have attached an example of this in LabVIEW that might be helpful just for seeing the flow.
Thanks,
Andy McRorie
NI R&D
Attachments:
thread_test.seq 32 KB
testthread.vi 19 KB
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