Multi-Threading Forms - AQ integration
So the new thread.
Grant,I'am glad to know that Forms Product Team looks to AQ integration as a feature.
I just want to explain a litle bit more about my request.
Todays, we talk more and more about integration, loosely coupled applications, bpm and so one but..
And now the question is what technology should my application use because we are in front of such questions of integration.
Forms is the choice me made and no regrets on that!
It is powerful and easy to build applications whith.
But we are at part 2 of rebuilding our applications and now the needs are changing: for example all users connected to forms may be involved in a workflow that display tasks and response and process from department A to B etc..
Or an incomming call from customers in department A should warn department B and open the right form at the right moment.
So how to achieve this whith keeping in mind that forms is the center application.
I don't think I'am alone requiring an interactive forms and as a standard feature of the product.
Thanks for your previously answer and we will take a look at AQ integration more deeply.
Regards
Jean-Yves.
Whereby we are trying to run our mappings being a multi CPU processor, the mappings always consume single CPU.Feature which are you looking for is Parallel Query and Parallel DML (it is an Oracle database features and OWB can use it for speedup of mapping execution).
Start with reading concepts from Oracle data warehouseing guide (don't know Oracle database release which are you using, so I give reference to Oracle11gR1 documentation)
http://download.oracle.com/docs/cd/B28359_01/server.111/b28313/usingpe.htm#i1009828
And also look at two forum threads with examples of tuning mapping executions
Hanging deployment
Transformation logics
Regards,
Oleg
Similar Messages
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Creating a cfhttp multi part form post for google docs upload
Hey all,
If you saw my last thread, you know I am working with google docs and uploading documents to it. Well I got basic document uploading working, but now I am trying to include meta data. Google requires you to include the metadata with the actual file data and seperate them by using a multi part form upload. I don't know exactly the process for doing so, but they have a handy code snippet of the desired results at
http://code.google.com/apis/documents/docs/3.0/developers_guide_protocol.html#UploadingDoc s
So I am basically trying to mimic that payload, however I am continually getting an error stating that there are no parts in a multi part form upload.
<errors xmlns='http://schemas.google.com/g/2005'><error><domain>GData</domain><code>InvalidEntryException</code><internalReason>No parts detected in multipart message</internalReason></error></errors>
to be exact. I am not really sure what I am doing wrong here. I figure it is one of two things, either I am not including the actual data in the payload properly (I am currently using a body type param for the payload, but I have also tried a formfield named content to deliver it. Neither worked). So maybe I need to do something else tricky there? The other thing which I am not reallly sure about is the content-length attribute. I don't know exactly how to calculate that, and I read in another forum that a content length attribute was messing that guy up. Right now I am just taking the lenght of the payload string and multiplying by 8 (to get the number of bytes for the entire payload) but hell if I know if that is right. It could be I just don't know how to set up the parts for the message, it seems pretty straight forward though. Just define a boundary in the content-type, then put two dashes before it wherever you define a new part, and two dashes trailing the last part.
Anyway, here is my code, any help is much appreciate. I'm a bit beyond my expertise here (not really used to trying to have to roll my own http requests, nevermind multipart post form data) so I'm kinda flailing around. Thanks again.
<cffunction name="upload" access="public" returnType="any" hint="I upload the document." output="false">
<cfargument name="filePath" type="string" required="false" hint="file to upload.">
<cfargument name="docType" type="string" required="yes" hint="The document type to identify this document see google list api supported documents">
<cfargument name="parentCollectionId" type="string" required="no" hint="the name of the collection/collection to create (include collection%3A)">
<cfargument name="metaData" type="struct" required="no" hint="structure containing meta data. Keyname is attribute name, value is the value">
<cfset var result = structnew()>
<cfset result.success = true>
<cftry>
<cfif structkeyexists(arguments,"parentCollectionId")>
<cfset arguments.parentCollectionId = urlencodedformat(parentCollectionId)>
<cfset result.theUrl = "https://docs.google.com/feeds/default/private/full/#arguments.parentCollectionId#/contents">
<cfelse>
<cfset result.theUrl = "https://docs.google.com/feeds/default/private/full/">
</cfif>
<cfoutput>
<cffile action="read" file="#arguments.filePath#" variable="theFile">
<cfsavecontent variable="atomXML">
Content-Type: application/atom+xml
<?xml version='1.0' encoding='UTF-8'?>
<entry xmlns="http://www.w3.org/2005/Atom" xmlns:docs="http://schemas.google.com/docs/2007">
<category scheme="http://schemas.google.com/g/2005##kind"
term="http://schemas.google.com/docs/2007###arguments.docType#"/>
<cfloop collection="#arguments.metaData#" item="key">
<#key#>#arguments.metadata[key]#</#key#>
</cfloop>
</entry>
--END_OF_PART
Content-Type: text/plain
#theFile#
--END_OF_PART--
</cfsavecontent>
</cfoutput>
<cfset result.postData = atomXML>
<cfhttp url="#result.theUrl#" method="post" result="httpRequest" charset="utf-8" multipart="yes">
<cfhttpparam type="header" name="Authorization" value="GoogleLogin auth=#getAuth()#">
<cfhttpparam type="header" name="GData-Version" value="3">
<cfhttpparam type="header" name="Content-Length" value="#len(trim(atomXML))*8#">
<cfhttpparam type="header" name="Content-Type" value="multipart/related; boundary=END_OF_PART">
<cfhttpparam type="header" name="Slug" value="test file --END_OF_PART">
<cfhttpparam type="body" name="content" value="#trim(atomXML)#">
</cfhttp>
<cftry>
<cfset packet = xmlParse(httpRequest.fileContent)>
<cfif httpRequest.statusCode neq "201 created">
<cfthrow message="HTTP Error" detail="#httpRequest.fileContent#" type="HTTP CODE #httpRequest.statusCode#">
</cfif>
<cfset result.data.resourceId = packet.entry['gd:resourceId'].xmlText>
<cfset result.data.feedLink = packet.entry['gd:feedLink'].xmlText>
<cfset result.data.title = packet.entry.title.xmlText>
<cfset result.data.link = packet.entry.title.xmlText>
<cfcatch>
<cfset result.data = httpRequest>
</cfcatch>
</cftry>
<cfcatch type="any">
<cfset result.error = cfcatch>
<cfset result.success = false>
</cfcatch>
</cftry>
<cfreturn result>
</cffunction>
Also, this is what my atomXML data ended up looking like when it got sent to google. This isn't the WHOLE request (it doesn't include the headers, just the body).
Content-Type: application/atom+xml
<?xml version='1.0' encoding='UTF-8'?>
<entry xmlns="http://www.w3.org/2005/Atom" xmlns:docs="http://schemas.google.com/docs/2007">
<category scheme="http://schemas.google.com/g/2005#kind" term="http://schemas.google.com/docs/2007#document"/>
<TITLE>Woot Test</TITLE> </entry>
--END_OF_PART
Content-Type: text/plain
I'm a test document lol!
--END_OF_PART--Woot, I got it. I had to send the gData version number, and change the URL.
Here is the working function.
<cffunction name="upload" access="public" returnType="any" hint="I upload the document." output="false">
<cfargument name="myFile" type="string" required="false" hint="file to upload.">
<cfset var result = "">
<cfset theUrl = "https://docs.google.com/feeds/default/private/full">
<cffile action="read" file="C:\website\xerointeractive\testing\test.txt" variable="theFile">
<cfset fileSize = createObject("java","java.io.File").init("C:\website\xerointeractive\testing\test.txt").length()>
<cfhttp url="#theURL#" method="post" result="result" charset="utf-8" >
<cfhttpparam type="header" name="Authorization" value="GoogleLogin auth=#getAuth()#">
<cfhttpparam type="header" name="Content-Type" value="text/plain">
<cfhttpparam type="header" name="Slug" value="test file">
<cfhttpparam type="header" name="GData-Version" value="3">
<cfhttpparam type="header" name="Content-Length" value="#fileSize#">
<cfhttpparam type="body" value="#theFile#">
</cfhttp>
<cfreturn result>
</cffunction> -
InfoPath: the multi-threading challenge
Or to be more specific: calling a DataSource from a different thread.
A project I'm working on includes an InfoPath form in which some heavy duty tasks are executed. These tasks can take over 10+ seconds to execute. To avoid the GUI to get stuck during execution, multi-threading is implemented. The problem lies in providing
feedback to the user. Several methods have been used, but all end in the exceptions shown below.
Unlike WinForms and such, InfoPath does not seem to provide a way to invoke the GUI. What we are trying to do is change field values to reflect the status of the process. This is done through the MainDataSource. I've tried several methods to call
this datasource through another thread, like invoking a provided delegate, or execution context. However all these methods have similar results.
When calling a method or property on the datasource the following exception is thrown:
System.InvalidOperationException was unhandled
Message="Operation is not valid due to the current state of the object."
Source="Microsoft.Office.InfoPath.Client.Internal.Host"
StackTrace:
at Microsoft.Office.Interop.InfoPath.SemiTrust.ICLRExtensionsWrapper.IncrementSqmPoint(Int32 idDataPt)
at Microsoft.Office.InfoPath.Internal.DataSourceHost.CreateNavigator()
at Form1.FormCode.ContextCallbackMethod(Object obj) in E:\Projects\InfoPath Multithreading\Source\Form1\FormCode.cs:line 74
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at Form1.FormCode.ThreadMethod(Object myParamsObj) in E:\Projects\InfoPath Multithreading\Source\Form1\FormCode.cs:line 68
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart(Object obj)
This seems to indicate the DataSource is locked for some reason. Even the ReadOnly property can not be read.
When calling the SetValue method on an XPathNavigator provided by a datasource and passed through another thread, the following exception is thrown:
System.AccessViolationException was unhandled
Message="Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
Source="Microsoft.Office.InfoPath.Client.Internal.Host.Interop"
StackTrace:
at Microsoft.MsoOffice.InfoPath.MsxmlInterop.NativeHelpers.SetText(IXMLDOMNode* , Char* )
at Microsoft.MsoOffice.InfoPath.MsxmlInterop.MsxmlNodeImpl.set_Text(String strText)
at Microsoft.Office.InfoPath.MsxmlNavigator.SetValue(String value)
at Form1.FormCode.DelegateMethod(XPathNavigator nav) in E:\Projects\InfoPath Multithreading\Source\Form1\FormCode.cs:line 81
at Form1.FormCode.ThreadMethod(Object myParamsObj) in E:\Projects\InfoPath Multithreading\Source\Form1\FormCode.cs:line 70
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart(Object obj)
I have searched through the internet but am unable to find any useful information about this subject. There are only a few weeks remaining before the deadline. A work-around has been implemented, but since it requires additional active user interaction
it is far from ideal. I hope you can help me in finding a solution.For anyone who is still interested all this time later....
I wouldn't use a Dispatcher in InfoPath simply because InfoPath requires .Net 2.0 only and Dispatcher was not added until .Net 3.0 which means you would have to enforce installation of .Net 3.0 yourself.
There is an easy alternative which is SynchronizationContext (more specifically a WindowsFormsSynchronizationContext).
Also I suggest you do not use ThreadStart but rather use one of the more modern and well known threading paradigms. A good alternative is a BackgroundWorker.
e.g.
private BackgroundWorker _Worker;
public void InternalStartup()
InitializeWorker();
((ButtonEvent)EventManager.ControlEvents["Button"]).Clicked += new ClickedEventHandler(ButtonClick);
public void InitializeWorker()
_Worker = new BackgroundWorker();
_Worker.WorkerReportsProgress = true;
_Rorker.WorkerSupportsCancellation = true;
_Worker.DoWork += new DoWorkEventHandler(_Worker_DoWork);
_Worker.ProgressChanged += new ProgressChangedEventHandler(_Worker_ProgressChanged);
_Worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(_Worker_RunWorkerCompleted);
public void ButtonClick(object sender, ClickedEventArgs e)
if (_Worker.IsBusy)
_Worker.CancelAsync();
else
// Very important to include this line!
AsyncOperationManager.SynchronizationContext = new WindowsFormsSynchronizationContext();
_Worker.RunWorkerAsync();
void _Worker_DoWork(object sender, DoWorkEventArgs e)
// Do stuff in another thread and report back to the UI thread.
object state;
int percentage = 0;
_Worker.ReportProgress(percentage, state).
public void _Worker_ProgressChanged(object sender, ProgressChangedEventArgs e)
// This is called on the thread that started the worker.
// In this case the UI thread which means it is safe to use the MainDataSource.
CreateNavigator().SelectSingleNode("my:Main/my:Progress", NamespaceManager).SetValue(e.ProgressPercentage);
void _Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
// Do anything you want to do on completion here.
One thing of note is that the SynchronizationContext in InfoPath for some reason or other always seems to be Null. The result is that when you call RunWorkerAsync() it captures the current synchronization context (null) which means the default is used and
a ProgressChanged is called on a new thread each time. To prevent this we need to manually set the context before calling RunWorkerAsync() which is done using the AsyncOperationManager. -
Aggregate Storage And Multi-Threading/Multi-Core Systems
Please pardon if this question has been asked before, but the Forum search is not returning any relevant results.
We are in the process of purchasing hardware for an 11.1.2 Essbase environment. We are going 64-bit, on Windows 2008, with either 32 GB or 64 GB of system RAM. The debate we are having is the number of CPUs and cores per CPU. We have not built any ASO databases as of yet, but we plan to launch a major BSO to ASO conversion project once 11.1.2 is off the ground here.
Historically, with BSO, we did not see performance improvements significant enough to justify the cost of additional CPUs when we ran calcs on multi-CPU systems vs. single or dual CPU systems, even when the settings and design should have taken the most advantage of BSO's multi-threading capabilities. However, it would seem that ASO's design may be able to make better use of multi-core systems.
I know that there are a lot of factors behind any system's performance, but in general, is ASO in 11.1.2 written well enough to make it worthwhile to consider, say, a four CPU, total 16 core system vs. a 2 CPU, total four core system?Grand central dispatch - infancy, not really doing its job, and I don't think apps have to be specifically written for HT, but they do have to not do things that they use to - prevent threads from going to sleep! or be parked.
high usage is not necessarily high efficiency. often the opposite.
Windows 7 seems to be optimized for multi-core thanks to a lot of reworking. Intel wants and knows it isn't possible to hand code, that the hardware has to be smarter, too. But the OS has a job, and right now I don't think it does it properly. Or handle memory.
Gulftown's 12MB cache will help, and over all should be 20% more efficient doing its work.
With dual processors, and it doesn't look like there are two quick path bridges, data shuffling has led to memory thrashing. Use to be page thrashing with not enough memory. Then core thrashing but having the cores, but not integrated (2008 is often touted as being greatest design so far, but it was FOUR dual-cores, 2009 was the first with a processor that really was new design and (native) 4-core.
One core should be owned by the OS so it is always available for its own work and housekeeping.
The iTunes audio bug last year showed how damaging and not to implement code and how a thread could usurp processing and add a high cpu temperature while basically doing nothing, sort of a denial of service attack on the processor - those 80*C temps people had.
All those new technology features under development and not like OpenCL, GCD and even OpenGL are tested, mature but rather 1.0 foundation for the future. A year ahead of readiness. -
Hi all,
What is multi threading? How to implement multi threading in ABAP?
Regards,
BryanHi
How the vision connector framework works
The connector interacts with an SAP application using connector modules. The connector modules make calls to SAP's Native Interfaces and pass data (business object or event data) to and from an SAP application. The connector's flexible design enables different modules to be used for different tasks such as initializing the connector with the SAP application or passing business object data.
Communication between the connector and an SAP application
The connector uses SAP's Remote Function Call (RFC) library to communicate with an SAP application. SAP's RFC API allows external programs to call ABAP function modules within an SAP application.
Processing business objects
The connector is metadata driven. Metadata, in the WebSphere business integration system, is application-specific data that is stored in business objects and that assists a connector module in its interaction with the application. A metadata-driven connector module handles each business object that it supports based on metadata encoded in the business object definition rather than on instructions hard-coded in the connector module.
Business object metadata includes the structure of a business object, the settings of its attribute properties, and the content of its application-specific information. Because connector modules are metadata driven, they can handle new or modified business objects without requiring modifications to the connector-module code.
The vision connector framework uses the value of the verb application-specific information in the top-level business object to call the appropriate connector module to process the business object. The verb application-specific information provides the classname of the connector module.
The verb application-specific information of most top-level business objects must identify the classname of the connector module. The syntax of this verb application-specific information is:
AppSpecificInfo = PartialPackageName.ClassName,
For example,
AppSpecificInfo = sap.sapextensionmodule.VSapBOHandler,
In this example, sap.sapextensionmodule is the partial package name, and VSapBOHandler is the classname. The full package name includes the com.crossworlds.connectors prefix, which the WebSphere business integration system adds to the name automatically. In other words, the full text of the example is:
com.crossworlds.connectors.sap.sapextensionmodule.VSapBOHandler
Note:
The verb application-specific information of most top-level business objects must use a comma (,) delimiter after the connector classname. However, the Server verb, which is used by the RFC Server Module, is delimited instead by a semi-colon (;). For information about the Server verb, see How the RFC Server Module works and Supported verbs.
You need not specify the package name and classname for the verb application-specific information if the business object is used:
by the ALE Module to process application events; however, when you use the ALE Module to process service call requests, you must specify the package name and classname
by the ABAP Extension Module, which uses the default business object handler (sap.sapextensionmodule.VSapBOHandler)
Important:
Customer-generated connector modules that process business objects for the RFC Server Module must specify a full package name, which must begin with bapi. For example, bapi.client.Bapi_customer_getdetail2. The full package name in this example is bapi.client, and the classname is Bapi_customer_getdetail2.
Most business object processing is specific to each connector module. By default the connector uses the ABAP Extension Module. For more information on business object processing for the ABAP Extension Module, see Installing and customizing the ABAP Extension Module and Business object data routing to ABAP handlers. .
For more information on specifying verb application-specific information for the ALE Module, see Event processing and Processing multiple IDocs with a wrapper business object.
Processing multiple concurrent interactions
The Adapter Framework can create separate threads for processing an application event and a business object request. When processing multiple requests from the integration broker, it can create multiple threads to handle multiple business object requests. For example, when InterChange Server is the integration broker, the connector can receive multiple business object requests from multiple collaborations or from a multi-threaded collaboration.
Figure 4 illustrates the multi-threading architecture.
Figure 4. Multi-Threading Architecture of the Connector for SAP
Event processing
The connector performs the following steps when handling a poll call:
The Adapter Framework creates a single dedicated thread to handle poll calls. This thread calls the pollForEvents() method of the vision connector framework at the frequency specified in the PollFrequency configuration property.
The thread polls SAP, which uses a dialog process to locate and return the event.
Note:
If the connector's MaxNumberOfConnections configuration property evaluates to a number greater than 1, the vision connector framework dedicates a connection to SAP for polling. If MaxNumberOfConnections evaluates to 1, event and service-call request processing share a single connection to SAP.
The polling thread dies only when the connector shuts down.
Note:
Because the RFC Server connector agent pushes events out of SAP instead of polling for events, it spawns its own threads instead of using threads created by the connector framework. Because the ALE connector agent uses the RFC Server connector agent to access events, it also spawns its own threads instead of using threads created by the connector framework when it processes events.
Request processing
Independently of polling, the Adapter Framework can create multiple request-processing threads, one for each request business object. Each request thread instantiates the appropriate business object handler.
For example, when processing business object requests from InterChange Server, the number and type of business object handlers depends on the number and type of the collaborations sending the requests:
If multiple collaborations send business objects, each request thread instantiates a business object handler of the appropriate type.
If a multi-threaded collaboration sends multiple business objects of the same type, the request threads instantiate an equal number of business object handlers of that type.
If the connector's MaxNumberOfConnections configuration property evaluates to a number greater than 1, the vision connector framework dedicates one connection to SAP for polling and allocates the remaining connections to a pool used only for request processing.
As illustrated in Figure 4, the connector performs the following steps when handling a business object request:
The Adapter Framework creates a separate thread for each business object request. Each thread calls the doVerbFor() method of the Vision business object handler.
If the connector's MaxNumberOfConnections configuration property evaluates to a number greater than 1, the Vision business object handler checks the vision connector framework's connection pool to determine if a connection handle is available.
If the handle is available, the thread sends the request to SAP, which uses a dialog process to handle the request.
If the handle is not available, the thread waits until one becomes available. Thread sequencing determines the order in which each business object handler thread claims or waits for an available connection handle.
If the connector's MaxNumberOfConnections configuration property evaluates to 1, the Vision business object handler shares a connection with event processing.
SAP releases the dialog process after it completes processing and sends a return code.
The connector releases the connection handle after it receives the return code from SAP.
Setting the number of available connections
Use the MaxNumberOfConnections configuration property to specify the maximum number of connection handles available. The number of connections cannot exceed the number of dialog processes.
SAP locks the dialog process while processing an interaction, releasing it only when the interaction completes. Therefore, multiple concurrent requests lock an equal number of dialog processes until processing finishes.
Important:
Before setting a value for MaxNumberOfConnections, contact your SAP BASIS administrator to determine an appropriate value to maximize throughput without negatively affecting performance on the application server.
Support for multiple connections
By default the connector supports multiple-threads.
<b>
REWARD IF USEFULL</b> -
Oraclient9i.dll error in multi threaded delphi server application
I created a multi threaded server application in delphi using oracle9i and indy server components. When I run my application, I am getting an error "oraclient9i.dll" error when executing my SQL statements. I have check communication between my server application and the client application without using oracle and its working fine, its only when I started executing SQL statements when I got this error.
Can anybody help me with this problem or point me to the right direction on how to resolve this issue.
thanks> I have tried what you suggested. I have created a
seperate TOracleSession on each thread that I create
on the OnConnect event however I am having Problems
using the oraclesession created on the OnExecute
event. Somehow it is still executing the SQL that I
have created on the main form where I first opened an
oraclesession component created on the main form.
It sounds then like the TOracleSession object in the thread is a copy of the one in the main thread/form.
> Do you think that It would work if I create an
instance of the TOracleDatasets and TOracleQuery on
the OnExecute event and also at the same time create
my TOracleSession on this event and continue
processing the data receive from the client server.
I've never used the Indy components for threading. The default TThread class worked just fine for me.
What I used to do is define the session and database objects as privates in my new thread class (let's call it TThreadSQL) - which was subclassed from TThread.
The constructor of this new TThreadSQL class did the following (writing here purely from memory - have not done Delphi for some time now): constructor TThreadSQL.Create( TNSalias, username, password : string );
// constructor is called with the Oracle session connection details
begin
inherited Create; // call the parent class constructor
CreateOracleSession; // call own private method to create an Oracle connection
end;
The CreateOracleSession method would then:
- create a BDE Session (TSession) object
- create a BDE Database (TDatabase) object, using the BDE Oracle native driver and an Oracle TNS alias plus username and password for connection
The destructor would close the connection. The Execute method which is used to fire up the thread, would use a TQuery object (or whatever) to execute a SQL using it owns connection. -
Multi-part form problem (array & session help needed)
I have a multi-part form that consists of 3 pages(forms) which each save data to the session. When the final form is complete, I insert the session variables to the DB via a FINISH button.
I now want to take another step. Page 2 of this multi-part form allows users to add "items". Presently, they can add only 1 item, and move the page 3 by hitting a next button. I would like to add a "Add another item" button that goes to the page 2 form again, allowing more items to be entered. I believe I need an array/table to do this, but don't know how I might do this in the session.
Is it possible to create an array in the session? If so, how? If not, how might I approach this?
I am trying to avoid inserting to the database (a remote db) until after a "preview" page following the form.
Any ideas? Thx in advance.Hi,
This forum thread may help you:
http://swforum.sun.com/jive/thread.jspa?forumID=123&threadID=50623
Thanks,
Creator Team. -
JMS multi thread best practise
Hi,
I would like to code a JMS layer that could be accessed by
a multi thread environment (a web app)
Is there any "Connection-Pool/DAO" equivalent design
pattern for JMS ?
Form what I know, connection are Thread Safe and Sessions
are not ...
PhilippeMany J2EE providers have their own JMS facades which provide pooling - so you could just use your container's JMS wrappers.
Another option, if you are inside a Servlet Engine, is to use Jencks which provides JMS & JDBC connection pooling as well as pooling of threads & message listeners & exception handling when consuming JMS messages.
e.g. here's inbound message consumption...
http://jencks.org/Message+Driven+POJOs
and here's outbound JMS (i.e. pooling when sending JMS messages etc)
http://jencks.org/Outbound+JMS
Jencks is basically a Spring based JCA container so it takes care of all the pooling for you as well as handling message inflow & outflow and can work with XA if you need it as well as local transactions.
James
http://logicblaze.com/ -
Hi Folks,
I have the following multi-row form:
!http://img216.imageshack.us/img216/7250/screenexample.jpg!
This is based on the following query:
SELECT id,
ticker,
deal_date,
deal_type,
no_shares,
price_per_share,
commision,
stamp_duty,
APEX_ITEM.CHECKBOX( 1, NULL ) AS group_ind,
trade_group_id
FROM trades
WHERE ticker = 'FXPO'
ORDER BY trade_group_id,
ticker,
deal_dateWhen I tick the GROUP_IND Checkbox, I want only the TRADE_GROUP_ID column value to be updated in the database for the associated row. Obviously, I could tick the checkbox in multiple rows.
My questions are:
1. Is it possible to modify the ApplyMRU routine to do this?
2. If not, how would I go about submitting the ID and TRADE_GROUP_ID columns to a stored proc via an array from the APEX front end?
3. Is there a best practice solution for my reports.
I have some layout questions aswell, but I'll post those on a separate thread once the main functionality is working.
Cheers.
JamesJames,
You have access to the checked IDs using the apex_application.g_f01 array. You can pass it to your pl/sql ie:
procedure test(p_arr in vc_arr2)
begin
for in in 1..p_arr.count
loop dbms_output.put_line(p_arr(i));
end loop;
end;
now you can just call your procedure with a process test(apex_application.g_f01); -
Hi I'm writing a program like Multi-tap (the text entry before T9 introduced) on mobilephone.
I'm having problem with some of the KEYs. They do not work properly.
As indicated in the code
HERE HERE [3] suppose to function as space button....However whenever the key is pressed before the 'time out' (I use sceduler to implement the time out) it will print half of the previous character instead of space. this key is not related to the scheduler. so i suspect it is something related to multi-thread programming.
HERE HERE [1] function as the caps lock. it can even show the indicator properly.... so i need to settle this b4 i continue.
HEREHERE [2] function as clear button. it doest work too
Someone please help me....
* To change this template, choose Tools | Templates
* and open the template in the editor.
package textEntry;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.*;
import java.util.*;
* @author Ed's
public class MyCanvas extends GameCanvas {
public static final String[] keys =
{".?!,@`-_:;()&\'\"~10�$��+x*/\\|[]=<>#","abc", "def", "ghi", "jkl",
"mno", "pqrs", "tuv", "wxyz"};
public static final String[] capitalKey =
{".?!,@`-_:;()&\'\"~10�$��+x*/\\|[]=<>#","ABC", "DEF", "GHI", "JKL",
"MNO", "PQRS", "TUV", "WXYZ"};
StringBuffer width = new StringBuffer();
Timer keyTimer;
textEntryMain main;
public static char ch;
public boolean keypress=false;
public boolean capital;
public boolean diffrentKey;
String currentIndicator="abc";
int countPress=0;
//int previndex=0;
public int counter=-1;
int index=-1;
int print=0;
int white_space=6;
public StringBuffer sms;
int baseline=10;
int y_axis=12;
int line=1;
char last;
boolean dontPrint=true; //dont print if timer printed or it is at begining
Font font;
Graphics g;
public long time;
int poundHit=0;
String justPressed;
String prevPressed=null;
char prevChar;
//Sms class
Form smsfrm;
TextField smsField ;
//Char Selection speed
public boolean first;
int selection_speed=1500;
//font color (blue)
public int red=0,green=0,blue=255;
//Background color (white)
public int back_red=250,back_green=250,back_blue=250;
Form menu;
public MyCanvas(textEntryMain main){
super(false);
first=true;
this.main=main;
sms=new StringBuffer();
g=getGraphics();
font=Font.getFont(Font.FACE_PROPORTIONAL,Font.STYLE_BOLD,Font.SIZE_LARGE);
keyTimer = new Timer ();
keyTimer.schedule (new task (this), selection_speed, selection_speed);
drawIndicator(currentIndicator);
public void drawIndicator(String indicator){
Font f = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_ITALIC, Font.SIZE_SMALL);
Graphics g = getGraphics();
g.setFont(f);
int x= getWidth()-20;
g.setColor(back_red,back_green,back_blue);
g.fillRect(x,2,15,10);
g.setColor(20,20,20);
g.drawString(indicator, x, 2, g.TOP|g.LEFT);
public void callPaint(char ch){
drawIndicator(currentIndicator);
Graphics g= getGraphics();
g.setColor(back_red,back_green,back_blue);
if(first){
g.fillRect(0,0,getWidth(),getHeight());
reset();
redrawAll();
first=false;
//baseline -1 so that i can cover the pointer
g.fillRect(baseline-1,y_axis,font.charWidth(this.last)+3,font.getHeight());
g.setColor(red,green,blue);
g.setFont(font);
g.drawChar(ch,baseline,line*24,g.LEFT|g.BASELINE);
flushGraphics();
public void showPointer(){
Graphics g = getGraphics();
g.setColor(0,0,0);
g.drawLine(baseline,y_axis,baseline,2*line*12);
flushGraphics();
//pointer appear //pointer disappear-use white line so that it cover the pointer line
public void hidePointer(){
Graphics g = getGraphics();
g.setColor(back_red,back_green,back_blue);
g.drawLine(baseline,y_axis,baseline,2*line*12);
flushGraphics();
//draw the selected
public void ConfirmPaint(char ch){
Graphics g = getGraphics();
sms.append(ch);
g.setColor(red,green,blue);
g.setFont(font);
g.drawChar(ch,baseline,line*24,g.LEFT|g.BASELINE); //draw the selected
baseline+=font.charWidth(ch); // so that the nect letter won't be drawn on the same position
if(baseline>getWidth()-30){ //move to the next line
width.append((char)baseline);
baseline=10;y_axis+=24;
line+=1;
flushGraphics();
public synchronized void deleteChar(){
if(sms.charAt(sms.length()-1)==' '){
baseline-=white_space;
Graphics g= getGraphics();
g.setColor(back_red,back_green,back_blue);
g.fillRect(baseline,y_axis,font.charWidth(sms.charAt(sms.length()-1))+2,font.getHeight());
sms.deleteCharAt(sms.length()-1);
else{
baseline-=font.charWidth(sms.charAt(sms.length()-1));
Graphics g= getGraphics();
g.setColor(back_red,back_green,back_blue);
g.fillRect(baseline,y_axis,font.charWidth(sms.charAt(sms.length()-1))+2,font.getHeight());
sms.deleteCharAt(sms.length()-1);
flushGraphics();
public void redraw(char ch ){
Graphics g= getGraphics();
g.setColor(red,green,blue);
g.setFont(font);
g.drawChar(ch,baseline,line*24,g.LEFT|g.BASELINE);
baseline+=font.charWidth(ch);
if(baseline>getWidth()-30){
width.append((char)baseline);
baseline=10;y_axis+=24;
line+=1;
flushGraphics();
public void reset(){
if(width.length() >0)
width.delete(0,width.length()-1);
line=1;
baseline=10;y_axis=12;
public void redrawAll(){
Graphics g=getGraphics();
g.setColor(back_red,back_green,back_blue);
g.fillRect(0,0,getWidth(),getHeight());
reset();
for(int a=0;a<sms.length();a++)
redraw(sms.charAt(a));
/*public synchronized void keyRepeated (int keyCode) {
int one=1;
/* if(keyCode != KEY_POUND && keyCode != KEY_STAR){
ConfirmPaint((char)keyCode);
if (keyCode == 1){
ConfirmPaint((char)one);
public synchronized void keyPressed (int keyCode) {
justPressed=getKeyName(keyCode);
time=System.currentTimeMillis(); // record the time when the keypress is pressed
if(justPressed.equals("NUM0")){ //caps lock show indicator .............HERE HERE HERE HERE [1]
if(poundHit == 0){
currentIndicator="ABC";
poundHit++;
drawIndicator(currentIndicator);
//set the string buffer to another one
if(poundHit == 1){
currentIndicator="123";
poundHit++;
drawIndicator(currentIndicator);
if(poundHit == 2){
currentIndicator="abc";
poundHit=0;
drawIndicator(currentIndicator);
if(justPressed.equalsIgnoreCase("SEND")){ //send button allocated as clear button ................. HERE HERE HERE [2]
if(sms.length()>0){
hidePointer();
if(baseline<=10){
System.out.println(baseline);
line-=2;
baseline=(int)width.charAt(line);
line++;
y_axis-=24;
deleteChar();
if(justPressed.equals("STAR")){//space ........................................ HERE HERE HERE HERE HERE [3]
hidePointer();
sms.append(" ");
baseline+=white_space;
showPointer();
prevPressed=justPressed;
else{
if(justPressed.equals("NUM1")){index=0;}
if(justPressed.equals("NUM2")){index=1;}
if(justPressed.equals("NUM3")){index=2;}
if(justPressed.equals("NUM4")){index=3;}
if(justPressed.equals("NUM5")){index=4;}
if(justPressed.equals("NUM6")){index=5;}
if(justPressed.equals("NUM7")){index=6;}
if(justPressed.equals("NUM8")){index=7;}
if(justPressed.equals("NUM9")){index=8;}
if(index==0){
keypress=true;
if(justPressed.equalsIgnoreCase(prevPressed) || dontPrint){
if(dontPrint){countPress=35;}
if(countPress<34){
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
else{
countPress=0;
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
dontPrint=false;
else{ //this is executed when the key is not repeated (prev!=)
ConfirmPaint(last);
countPress=0;
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
last=MyCanvas.ch;
prevPressed=justPressed;
if(index==1 || index==2 || index == 3 || index == 4
|| index ==5 || index==7){
keypress=true;
if(justPressed.equalsIgnoreCase(prevPressed) || dontPrint){
if(dontPrint){countPress=4;}
if(countPress<3){
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
else{
countPress=0;
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
dontPrint = false;
else{ //this is executed when the key is not repeated
ConfirmPaint(last);
countPress=0;
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
last=MyCanvas.ch;
prevPressed=justPressed;
if(index==6 || index==8){
keypress=true;
if(justPressed.equalsIgnoreCase(prevPressed)|| dontPrint){
if(dontPrint){countPress=5;}
if(countPress<4){
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
else{
countPress=0;
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
dontPrint=false;
else{ //this is executed when the key is not repeated
ConfirmPaint(last);
countPress=0;
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
last=MyCanvas.ch;
prevPressed=justPressed;
/////////////task class for schedule on constructor
class task extends TimerTask {
public static boolean bool;
MyCanvas canvas;
public task (MyCanvas canvas) {
this.canvas=canvas;
public void run () {
if(canvas.keypress){
if(System.currentTimeMillis()-canvas.time>150){ //compare the time with the time out
canvas.ConfirmPaint(MyCanvas.ch);
canvas.counter=-1;
canvas.keypress=false;
canvas.dontPrint=true;
canvas.showPointer();
}Hi I'm writing a program like Multi-tap (the text entry before T9 introduced) on mobilephone.
I'm having problem with some of the KEYs. They do not work properly.
As indicated in the code
HERE HERE [3] suppose to function as space button....However whenever the key is pressed before the 'time out' (I use sceduler to implement the time out) it will print half of the previous character instead of space. this key is not related to the scheduler. so i suspect it is something related to multi-thread programming.
HERE HERE [1] function as the caps lock. it can even show the indicator properly.... so i need to settle this b4 i continue.
HEREHERE [2] function as clear button. it doest work too
Someone please help me....
* To change this template, choose Tools | Templates
* and open the template in the editor.
package textEntry;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.*;
import java.util.*;
* @author Ed's
public class MyCanvas extends GameCanvas {
public static final String[] keys =
{".?!,@`-_:;()&\'\"~10�$��+x*/\\|[]=<>#","abc", "def", "ghi", "jkl",
"mno", "pqrs", "tuv", "wxyz"};
public static final String[] capitalKey =
{".?!,@`-_:;()&\'\"~10�$��+x*/\\|[]=<>#","ABC", "DEF", "GHI", "JKL",
"MNO", "PQRS", "TUV", "WXYZ"};
StringBuffer width = new StringBuffer();
Timer keyTimer;
textEntryMain main;
public static char ch;
public boolean keypress=false;
public boolean capital;
public boolean diffrentKey;
String currentIndicator="abc";
int countPress=0;
//int previndex=0;
public int counter=-1;
int index=-1;
int print=0;
int white_space=6;
public StringBuffer sms;
int baseline=10;
int y_axis=12;
int line=1;
char last;
boolean dontPrint=true; //dont print if timer printed or it is at begining
Font font;
Graphics g;
public long time;
int poundHit=0;
String justPressed;
String prevPressed=null;
char prevChar;
//Sms class
Form smsfrm;
TextField smsField ;
//Char Selection speed
public boolean first;
int selection_speed=1500;
//font color (blue)
public int red=0,green=0,blue=255;
//Background color (white)
public int back_red=250,back_green=250,back_blue=250;
Form menu;
public MyCanvas(textEntryMain main){
super(false);
first=true;
this.main=main;
sms=new StringBuffer();
g=getGraphics();
font=Font.getFont(Font.FACE_PROPORTIONAL,Font.STYLE_BOLD,Font.SIZE_LARGE);
keyTimer = new Timer ();
keyTimer.schedule (new task (this), selection_speed, selection_speed);
drawIndicator(currentIndicator);
public void drawIndicator(String indicator){
Font f = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_ITALIC, Font.SIZE_SMALL);
Graphics g = getGraphics();
g.setFont(f);
int x= getWidth()-20;
g.setColor(back_red,back_green,back_blue);
g.fillRect(x,2,15,10);
g.setColor(20,20,20);
g.drawString(indicator, x, 2, g.TOP|g.LEFT);
public void callPaint(char ch){
drawIndicator(currentIndicator);
Graphics g= getGraphics();
g.setColor(back_red,back_green,back_blue);
if(first){
g.fillRect(0,0,getWidth(),getHeight());
reset();
redrawAll();
first=false;
//baseline -1 so that i can cover the pointer
g.fillRect(baseline-1,y_axis,font.charWidth(this.last)+3,font.getHeight());
g.setColor(red,green,blue);
g.setFont(font);
g.drawChar(ch,baseline,line*24,g.LEFT|g.BASELINE);
flushGraphics();
public void showPointer(){
Graphics g = getGraphics();
g.setColor(0,0,0);
g.drawLine(baseline,y_axis,baseline,2*line*12);
flushGraphics();
//pointer appear //pointer disappear-use white line so that it cover the pointer line
public void hidePointer(){
Graphics g = getGraphics();
g.setColor(back_red,back_green,back_blue);
g.drawLine(baseline,y_axis,baseline,2*line*12);
flushGraphics();
//draw the selected
public void ConfirmPaint(char ch){
Graphics g = getGraphics();
sms.append(ch);
g.setColor(red,green,blue);
g.setFont(font);
g.drawChar(ch,baseline,line*24,g.LEFT|g.BASELINE); //draw the selected
baseline+=font.charWidth(ch); // so that the nect letter won't be drawn on the same position
if(baseline>getWidth()-30){ //move to the next line
width.append((char)baseline);
baseline=10;y_axis+=24;
line+=1;
flushGraphics();
public synchronized void deleteChar(){
if(sms.charAt(sms.length()-1)==' '){
baseline-=white_space;
Graphics g= getGraphics();
g.setColor(back_red,back_green,back_blue);
g.fillRect(baseline,y_axis,font.charWidth(sms.charAt(sms.length()-1))+2,font.getHeight());
sms.deleteCharAt(sms.length()-1);
else{
baseline-=font.charWidth(sms.charAt(sms.length()-1));
Graphics g= getGraphics();
g.setColor(back_red,back_green,back_blue);
g.fillRect(baseline,y_axis,font.charWidth(sms.charAt(sms.length()-1))+2,font.getHeight());
sms.deleteCharAt(sms.length()-1);
flushGraphics();
public void redraw(char ch ){
Graphics g= getGraphics();
g.setColor(red,green,blue);
g.setFont(font);
g.drawChar(ch,baseline,line*24,g.LEFT|g.BASELINE);
baseline+=font.charWidth(ch);
if(baseline>getWidth()-30){
width.append((char)baseline);
baseline=10;y_axis+=24;
line+=1;
flushGraphics();
public void reset(){
if(width.length() >0)
width.delete(0,width.length()-1);
line=1;
baseline=10;y_axis=12;
public void redrawAll(){
Graphics g=getGraphics();
g.setColor(back_red,back_green,back_blue);
g.fillRect(0,0,getWidth(),getHeight());
reset();
for(int a=0;a<sms.length();a++)
redraw(sms.charAt(a));
/*public synchronized void keyRepeated (int keyCode) {
int one=1;
/* if(keyCode != KEY_POUND && keyCode != KEY_STAR){
ConfirmPaint((char)keyCode);
if (keyCode == 1){
ConfirmPaint((char)one);
public synchronized void keyPressed (int keyCode) {
justPressed=getKeyName(keyCode);
time=System.currentTimeMillis(); // record the time when the keypress is pressed
if(justPressed.equals("NUM0")){ //caps lock show indicator .............HERE HERE HERE HERE [1]
if(poundHit == 0){
currentIndicator="ABC";
poundHit++;
drawIndicator(currentIndicator);
//set the string buffer to another one
if(poundHit == 1){
currentIndicator="123";
poundHit++;
drawIndicator(currentIndicator);
if(poundHit == 2){
currentIndicator="abc";
poundHit=0;
drawIndicator(currentIndicator);
if(justPressed.equalsIgnoreCase("SEND")){ //send button allocated as clear button ................. HERE HERE HERE [2]
if(sms.length()>0){
hidePointer();
if(baseline<=10){
System.out.println(baseline);
line-=2;
baseline=(int)width.charAt(line);
line++;
y_axis-=24;
deleteChar();
if(justPressed.equals("STAR")){//space ........................................ HERE HERE HERE HERE HERE [3]
hidePointer();
sms.append(" ");
baseline+=white_space;
showPointer();
prevPressed=justPressed;
else{
if(justPressed.equals("NUM1")){index=0;}
if(justPressed.equals("NUM2")){index=1;}
if(justPressed.equals("NUM3")){index=2;}
if(justPressed.equals("NUM4")){index=3;}
if(justPressed.equals("NUM5")){index=4;}
if(justPressed.equals("NUM6")){index=5;}
if(justPressed.equals("NUM7")){index=6;}
if(justPressed.equals("NUM8")){index=7;}
if(justPressed.equals("NUM9")){index=8;}
if(index==0){
keypress=true;
if(justPressed.equalsIgnoreCase(prevPressed) || dontPrint){
if(dontPrint){countPress=35;}
if(countPress<34){
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
else{
countPress=0;
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
dontPrint=false;
else{ //this is executed when the key is not repeated (prev!=)
ConfirmPaint(last);
countPress=0;
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
last=MyCanvas.ch;
prevPressed=justPressed;
if(index==1 || index==2 || index == 3 || index == 4
|| index ==5 || index==7){
keypress=true;
if(justPressed.equalsIgnoreCase(prevPressed) || dontPrint){
if(dontPrint){countPress=4;}
if(countPress<3){
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
else{
countPress=0;
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
dontPrint = false;
else{ //this is executed when the key is not repeated
ConfirmPaint(last);
countPress=0;
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
last=MyCanvas.ch;
prevPressed=justPressed;
if(index==6 || index==8){
keypress=true;
if(justPressed.equalsIgnoreCase(prevPressed)|| dontPrint){
if(dontPrint){countPress=5;}
if(countPress<4){
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
else{
countPress=0;
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
dontPrint=false;
else{ //this is executed when the key is not repeated
ConfirmPaint(last);
countPress=0;
MyCanvas.ch=keys[index].charAt(countPress);
callPaint(MyCanvas.ch);
countPress++;
last=MyCanvas.ch;
prevPressed=justPressed;
/////////////task class for schedule on constructor
class task extends TimerTask {
public static boolean bool;
MyCanvas canvas;
public task (MyCanvas canvas) {
this.canvas=canvas;
public void run () {
if(canvas.keypress){
if(System.currentTimeMillis()-canvas.time>150){ //compare the time with the time out
canvas.ConfirmPaint(MyCanvas.ch);
canvas.counter=-1;
canvas.keypress=false;
canvas.dontPrint=true;
canvas.showPointer();
} -
Is rendering in Final Cut single thread or multi thread?
There seems to be this recurring message about how the new Macpros perform single-threaded tasks about the same as the previous gen of Macpros, however in multi-threaded tasks the new Pros shine.
How do I know if a task is single-threaded or multi-threaded? I do a lot of rendering video filters, generators, effects, etc. in Final Cut. Even something as (seemingly) simple as generating scrolling credits takes forever to render.
Is video rendering a multi-threaded task? Will I see time significant time savings in rendering with the new Pro machines?It's not right now but the new Mac Pros are faster in single-threaded modes anyway:
http://www.macrumors.com/2009/03/14/updated-mac-pro-benchmarks-and-video-of-inte rnals/
Turns out the initial benchmarks were incorrect. The integrated memory controller is a MASSIVE performance boost. But it is inevitable that Apple will eventually choose the multi-threaded route for Final Cut Studio anyway, even if they do not at the present. -
SSRS - Is there a multi thread safe way of displaying information from a DataSet in a Report Header?
In order to dynamically display data in the Report Header based in the current record of the Dataset, we started using Shared Variables, we initially used ReportItems!SomeTextbox.Value, but we noticed that when SomeTextbox was not rendered in the body
(usually because a comment section grow to occupy most of the page if not more than one page), then the ReportItem printed a blank/null value.
So, a method was defined in the Code section of the report that would set the value to the shared variable:
public shared Params as String
public shared Function SetValues(Param as String ) as String
Params = Param
Return Params
End Function
Which would be called in the detail section of the tablix, then in the header a textbox would hold the following expression:
=Code.Params
This worked beautifully since, it now didn't mattered that the body section didn't had the SetValues call, the variable persited and the Header displayed the correct value. Our problem now is that when the report is being called in different threads with
different data, the variable being shared/static gets modified by all the reports being run at the same time.
So far I've tried several things:
- The variables need to be shared, otherwise the value set in the Body can't be seen by the header.
- Using Hashtables behaves exactly like the ReportItem option.
- Using a C# DLL with non static variables to take care of this, didn't work because apparently when the DLL is being called by the Body generates a different instance of the DLL than when it's called from the header.
So is there a way to deal with this issue in a multi thread safe way?
Thanks in advance!
Hi Angel,
Per my understanding that you want to dynamic display the group data in the report header, you have set page break based on the group, so when click to the next page, the report hearder will change according to the value in the group, when you are using
the shared variables you got the multiple thread safe problem, right?
I have tested on my local environment and can reproduce the issue, according to the multiple safe problem the better way is to use the harshtable behaves in the custom code, you have mentioned that you have tryied touse the harshtable but finally got
the same result as using the ReportItem!TextBox.Value, the problem can be cuased by the logic of the code that not works fine.
Please reference to the custom code below which works fine and can get all the expect value display on every page:
Shared ht As System.Collections.Hashtable = New System.Collections.Hashtable
Public Function SetGroupHeader( ByVal group As Object _
,ByRef groupName As String _
,ByRef userID As String) As String
Dim key As String = groupName & userID
If Not group Is Nothing Then
Dim g As String = CType(group, String)
If Not (ht.ContainsKey(key)) Then
' must be the first pass so set the current group to group
ht.Add(key, g)
Else
If Not (ht(key).Equals(g)) Then
ht(key) = g
End If
End If
End If
Return ht(key)
End Function
Using this exprssion in the textbox of the reportheader:
=Code.SetGroupHeader(ReportItems!Language.Value,"GroupName", User!UserID)
Links belowe about the hashtable and the mutiple threads safe problem for your reference:
http://stackoverflow.com/questions/2067537/ssrs-code-shared-variables-and-simultaneous-report-execution
http://sqlserverbiblog.wordpress.com/2011/10/10/using-custom-code-functions-in-reporting-services-reports/
If you still have any problem, please feel free to ask.
Regards
Vicky Liu -
Memory leaks and multi threading issues in managed client.
In our company we use a lot of Oracle, and after the release of the managed provider we migrated all applications to it. First the things were very impressive : the new client was faster, but after some days applications that uses 100MB with old client goes to 1GB and up. The memory is not the only issue, we use a lot of multi threading, and we experience connection drops and not disposal, after 1 days working one of the application had over 100 sessions on the server. I think there is something wrong with connection pool and multi threading.
Is someone experience same problems.
Yesterday we went back with unmanaged provider. Now things are back to normal.connection drops: did you try to use "Validate Connection=true" parameter in your connection string?
the new client was faster: are you sure with this statement? Even in 64bit environment? I got quite serious performance problems when running application under 64bit process: https://forums.oracle.com/thread/2595323 -
How to write a multi threaded Cache Event Listener
I have a distributed data cache called tokenCache for my application. I have also added a mapListener to this cache to listen to a particular kind of events.
tokenCache.addMapListener((MapListener) new TokenCacheListenerBean(), new MapEventFilter(tokenFilter), false);
So bascially everytime a token (The domain object of this cache) is updated the entryUpdated() method in my EJB TokenCacheListenerBean is invoked.
The issue I have though is that, from what I observe on running my code is that the Cache Listener is single threaded. So if two Token Objects on my tokenCache are updated,
lets say Token Object A and Token Object B one after the other, the entryUpdated() method in my EJB is invoked for Token Object A and once the invocation is complete
then the entryUpdated() method is invoked again for Token Object B(). At a given point of time there is only one instance of TokenCacheListenerBean EJB. Is there a way to
make this happen in multi-threaded manner ?
Is there a configuration setting somewhere which allows multiple CacheListeners to be instantiated at a given point of time ?
TokenCacheListenerBean EJB_
package oracle.communications.activation.asap.ace;
import java.util.Iterator;
import java.util.Set;
import java.util.logging.Logger;
import javax.ejb.Stateless;
import com.tangosol.net.NamedCache;
import com.tangosol.util.MapEvent;
import com.tangosol.util.MapListener;
import com.tangosol.util.ValueUpdater;
import com.tangosol.util.extractor.PofExtractor;
import com.tangosol.util.extractor.PofUpdater;
import com.tangosol.util.filter.EqualsFilter;
import com.tangosol.util.filter.LikeFilter;
import com.tangosol.util.filter.LimitFilter;
import com.tangosol.util.processor.UpdaterProcessor;
* Session Bean implementation class TokenCacheListenerBean
@Stateless
public class TokenCacheListenerBean implements TokenCacheListenerBeanRemote, TokenCacheListenerBeanLocal, MapListener {
NamedCache asdlCache;
NamedCache tokenCache;
private final int PAGE_SIZE = 1;
private static Logger logger = Logger.getLogger(ConnectionManager.class.getName());;
* An instance of the JCAModeler EJB, represents the JCA-JNEP
JCAModeler jcaBean;
* Default constructor.
public TokenCacheListenerBean() {
// TODO Auto-generated constructor stub
public void entryDeleted(MapEvent Event) {
public void entryInserted(MapEvent Event) {
public void entryUpdated(MapEvent Event) {
Token newToken = (Token) Event.getNewValue();
Token oldToken = (Token) Event.getOldValue();
if ((oldToken.getState() == Token.TOKEN_RESERVED)
&& (newToken.getState()== Token.TOKEN_AVAILABLE)) {
String networkID = newToken.getNeID();
asdlCache = AceCacheFactory.getCache("asdlCache");
tokenCache = AceCacheFactory.getCache("tokenCache");
EqualsFilter filterNE = new EqualsFilter(new PofExtractor(String.class,Asdl.NETWORKID), networkID);
LimitFilter limitFilter = new LimitFilter(filterNE, PAGE_SIZE);
Set removeASDL = asdlCache.keySet(limitFilter);
Iterator asdlIterator = removeASDL.iterator();
if (asdlIterator.hasNext()) {
logger.info(printASDLCache());
ValueUpdater updater = new PofUpdater(Token.STATE);
System.out.println("Token ID:" + newToken.getTokenID());
UpdaterProcessor updaterProcessor = new UpdaterProcessor(updater, Integer.toString(Token.TOKEN_RESERVED));
tokenCache.invoke(newToken.getTokenID(), updaterProcessor);
jcaBean = new JCAModeler(tokenCache);
Object asdlID = asdlIterator.next();
Asdl provisionAsdl = (Asdl) asdlCache.get(asdlID);
asdlCache.remove(asdlID);
jcaBean.provision(provisionAsdl, newToken.getTokenID());
logger.info(ConnectionManager.printTokenCache());
logger.info(printASDLCache());
}Here is what I am asking!
I have added 2 listeners (Listener A and Listener B) which each listen on for changes made to 2 different token Cache Objects (Token A and Token B).
for (i = 0; i < 2 ; i++) {
Token tokenAdded = new Token(UUID.randomUUID().toString(),TOKEN_AVAILABLE, networkID);
tokenCache.put(tokenAdded.getTokenID(), tokenAdded);
tokenCache.addMapListener((MapListener) new TokenCacheListener(), tokenAdded.getTokenID(), false);
Now assume that updates are made to Token A and Token B simuntaneosly.
Why do i observe in my diagnostic messages that only one Listener is invoked at a given point of time.
Which means I see Listener A getting invoked and then once invocation of Listener A is complete I see Listener B bieng invoked.
Ideally I would want both listeners to be invoked simultaneously rather than in a one off fashion.
Here is the code for my token cache Listener
package oracle.communications.activation.asap.ace;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.tangosol.net.CacheFactory;
import com.tangosol.net.NamedCache;
import com.tangosol.util.AbstractMapListener;
import com.tangosol.util.Filter;
import com.tangosol.util.MapEvent;
import com.tangosol.util.MapListener;
import com.tangosol.util.ObservableMap;
import com.tangosol.util.ValueUpdater;
import com.tangosol.util.extractor.PofExtractor;
import com.tangosol.util.extractor.PofUpdater;
import com.tangosol.util.filter.AndFilter;
import com.tangosol.util.filter.EqualsFilter;
import com.tangosol.util.filter.LikeFilter;
import com.tangosol.util.filter.LimitFilter;
import com.tangosol.util.processor.UpdaterProcessor;
public class TokenCacheListener extends AbstractMapListener {
NamedCache asdlCache;
NamedCache tokenCache;
AceCacheFactory cacheFactoryBean = new AceCacheFactory();
private final int PAGE_SIZE = 1;
private static Logger logger = Logger.getLogger(ConnectionManager.class
.getName());;
* An instance of the JCAModeler EJB, represents the JCA-JNEP
JCAModeler jcaBean;
* This is a utility method and prints the tokens cache.
public String printTokenCache() {
NamedCache tokenCache = cacheFactoryBean.getCache("tokenCache");
LikeFilter tokenList = new LikeFilter(new PofExtractor(String.class,
Token.STATE), "%", (char) 0, false);
Set keySet = tokenCache.keySet(tokenList);
StringBuffer cachedTokenList = new StringBuffer("\n################################## Token(s) Cache ##################################");
int counter = 1;
for (Object tokenInCache: keySet) {
Token tokenObject = (Token) tokenCache.get(tokenInCache.toString());
cachedTokenList.append("\nS.NO:" + (counter++)
+ "\t ID:" + tokenInCache.toString()
+ "\t State:" + Token.tokenToString(tokenObject.getState()));
cachedTokenList.append("\n####################################################################################");
return cachedTokenList.toString();
* This method is a utility method and it prints all the ASDL(s) currently present on the
* asdlCache.
private String printASDLCache() {
NamedCache asdlCache = cacheFactoryBean.getCache("asdlCache");
LikeFilter asdlList = new LikeFilter(new PofExtractor(String.class,
Asdl.NETWORKID), "%", (char) 0, false);
Set keySet = asdlCache.keySet(asdlList);
StringBuffer cachedASDLList = new StringBuffer("\n################ ASDL Cache ######## ########");
int counter = 1;
for (Object asdlInCache: keySet) {
cachedASDLList.append("\nS.NO:" + (counter++) + "\t ID:" + asdlInCache.toString());
cachedASDLList.append("\n################ ASDL Cache ######## ########\n");
return cachedASDLList.toString();
public TokenCacheListener() {
public void checkASDLCache(MapEvent Event) {
// Not currently used
public void entryUpdated(MapEvent Event) {
Token newToken = (Token) Event.getNewValue();
Token oldToken = (Token) Event.getOldValue();
logger.info("\n=============================================================================================="
+ "\nTOKEN CACHE LISTENER"
+ "\n=============================================================================================="
+ printTokenCache()
+ "\n==============================================================================================");
if ((oldToken.getState() == Token.TOKEN_RESERVED)
&& (newToken.getState()== Token.TOKEN_AVAILABLE)) {
String networkID = newToken.getNeID();
asdlCache = cacheFactoryBean.getCache("asdlCache");
tokenCache = cacheFactoryBean.getCache("tokenCache");
EqualsFilter filterNE = new EqualsFilter(new PofExtractor(String.class,Asdl.NETWORKID), networkID);
LimitFilter limitFilter = new LimitFilter(filterNE, PAGE_SIZE);
Set removeASDL = asdlCache.keySet(limitFilter);
Iterator asdlIterator = removeASDL.iterator();
if (asdlIterator.hasNext()) {
logger.info(printASDLCache());
ValueUpdater updater = new PofUpdater(Token.STATE);
System.out.println("Token ID:" + newToken.getTokenID());
UpdaterProcessor updaterProcessor = new UpdaterProcessor(updater, Integer.toString(Token.TOKEN_RESERVED));
tokenCache.invoke(newToken.getTokenID(), updaterProcessor);
jcaBean = new JCAModeler(tokenCache);
Object asdlID = asdlIterator.next();
Asdl provisionAsdl = (Asdl) asdlCache.get(asdlID);
asdlCache.remove(asdlID);
jcaBean.provision(provisionAsdl, newToken.getTokenID());
logger.info(printTokenCache());
logger.info(printASDLCache());
I only see one instance of this listener alive at any given point of time.
Edited by: 807103 on Nov 3, 2011 1:00 PM
Edited by: 807103 on Nov 3, 2011 1:12 PM -
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