Web service request ....one db connection per session OR all share one...

in servlet i use
public void init(ServletConfig config) throws ServletException { }
so it only gets the db connection once per session
now that I am working on a web service....im not sure how to do something similiar
I want to either have all request coming in to use the same ONE connection OR maybe one created per session
I have way too many web service requests and it creates too many jdbc connections....what can i do to pervent this?
I dont care if they have to wait longer;
I just want to cut down the number of jdbc connections to 1 to 2
any help appreciated, thanks

You want to use a connection pool. If you just use one connection, your web users are likely to be waiting on the availabilty of the connection. A pool will let you set whatever maximum you want; 1 or 100...
There are a number of database connection pooling options. One of the morepopular is DBCP, part of the Apache project, which is free and open source.
http://jakarta.apache.org/commons/dbcp/
There are other such "drop in" poolers and some database vendors are now supplying connection pooling in their drivers.

Similar Messages

Max streaming connections per session error

I have a flex application that uses messaging with a streaming AMF connection, falling back to polling. When the max number of streaming connections on the server is reached, it does fall back to polling (at least it prints the max-streaming-clients error but the client connects, so I assume it is falling back - how can I tell?). However, occasionally the streaming connection will not initialize and it does not fall back - no messages are received on the client. The following error is logged on the server:
[EMST]09/25/2008 13:43:18.231 [ERROR] Endpoint with id 'my-streaming-amf' cannot grant streaming connection to FlexClient with id 'D5B8E3A1-1A1C-063E-84A6-6A743A1E4EE0' because max-streaming-connections-per-session limit of '1' has been reached.
This would make sense if the issue was caused by trying to initialize the streaming connection in two tabs of a browser, but I am only trying to initialize in one tab. Closing the browser (and thus destroying the session) does not fix it. The only solution I've found is to reboot the client machine. This has happened in both FireFox 3.0.2 and IE 7.
(1) What could cause the client to get in this state?
(2) When it happens, why doesn't it fall back to polling? Is the fallback only for when the server max connections is reached? When the streaming connection doesn't initialize, no messages are received.
(3) Is there a way to explicitly close the streaming connection on the client so we can fix this without rebooting?
Thanks!

Hi Mary. If you turn on Debug level logging on the client and the server you should be able to tell if you have fallen back to a polling channel after the attempt to connect over the streaming channel has been rejected. In the client log, you will see the flex application sending poll requests to the server at the polling interval configured in the channel and in the server log you should see that the server is receiving these requests.
The behaviour you are seeing seems very strange to me. The reason we have the max-streaming-connections-per-session limit on the server is because most browsers limit the number of active connections that can be made to a server from a single session. In IE for example, this is 2. What happens in most cases when the browser's connection limit is reached is that new connections are put on hold until one of the existing connections closes. This would cause your flex application to hang with no errors being reported on the client or the server. This is why we need the max-streaming-connections-per-session setting on the server. This prevents more than one persistent connection from being made from the same session, so the browser should never reach it's max connections per server limit and lock up.
It looks like you are somehow getting the browser to lock up even though the server is only limiting you to one streaming connection per session. It may be possible to do this if you reload the flex application in the browser (by doing a page refresh) in which case the browser could possibly briefly leave the streaming connection open in the background and when you tried to create a new streaming connection, the browser's connection limit to the server would have been reached and the application could hang. When the application hangs are you reloading the swf/page in the browser?
I really don't know why closing the browser wouldn't fix the problem. You're right that closing the browser should end the session. If you launch a new browser and load the swf do you get the same "cannot grant streaming connection" error on the server or is the browser just locked up, ie. no error is received on the client and the server?
You're not using a proxy server or anything like that are you that might be holding a connection open to the server?
-Alex

Only able to create ONE QaaWS connection per Xcelsius model

Hi
We've just upgrated our solution to BOE XI3 - Premium, and are in the process of evaluating Xcelsius 2008. It seems that it is only possible to create ONE QaaWS connection per model - once the first one has been created, the option to add a new one is greyed out (all other connection-types are still available!). My first question would of course be if there is a one-connection limit per model, but from what I can read in the forum others are talking about multible QaaWS connections in one model.
Any suggestions to how I can add more QaaWS connections?
I in the past created several Xcelsius 4.5 models that contained multible QaaWS connections, but haven't tried to import any of these into Xcelsius 2008
br.
/J.I.

Hi
We've just upgrated our solution to BOE XI3 - Premium, and are in the process of evaluating Xcelsius 2008. It seems that it is only possible to create ONE QaaWS connection per model - once the first one has been created, the option to add a new one is greyed out (all other connection-types are still available!). My first question would of course be if there is a one-connection limit per model, but from what I can read in the forum others are talking about multible QaaWS connections in one model.
Any suggestions to how I can add more QaaWS connections?
I in the past created several Xcelsius 4.5 models that contained multible QaaWS connections, but haven't tried to import any of these into Xcelsius 2008
br.
/J.I.

Web Service Requests... how many per page

Can you only have 1 web service request per page within APEX. I'm guessing so, because I get an HTTP 404 error when I create two or more web service requests on a page?

Can you have a look at the mod_plsql log file to get the error why the 404 is raised.
thanks
Patrick

Increasing max-streaming-connections-per-session has slow acknowledge response?

Our application is a Flex GUI with a WebLogic Server (BlaseDS) on a private network. We were originally using IE 6, but have upgraded to IE 8.
I am trying to use publish/subscribe messaging to monitor lengthy processes on the server and received incremental data. With 1 such process everything works fine. But we want to allow the user to subscribe to more than 1 message destination. So I increased the "max-streaming-connections-per-session" (default is 1) in the services-config.xml file
     <channel-definition id="process-notification-streaming-amf"
          class="mx.messaging.channels.StreamingAMFChannel">
          <endpoint url=https://{server.name}:{server.port}/{context.root}/messagebroker/streamingnotificationamf"
          class="flex.messaging.endpoints.StreamingAMFEndpoint"/>
          <properties>
               <user-agent-settings>
                    <user-agent match-on="MSIE" kickstart-bytes="2048"
                         max-streaming-connections-per-session="3" />
               </user-agent-settings>
          </properties>
     </channel-definition>
If we leave max-streaming-connections-per-session as the default value of 1 and try to subscribe to another message destination we get an error indicating limit has been reached:
     [BlaseDS]Endpoint with id 'process-notification-streaming-amf' cannot grant streaming connection to FlexClient with id '7FFC82DE-etc ' because max-streaming-connections-per-session limit of '1' has been reached.
     We upgraded to IE8 as documentation indicates IE8 allows for an increase of max-streaming-connections-per-session, where IE 6 is limited to 1. But increasing max-streaming-connections-per-session does not quite solve the problem. We have 3 consumers; consumer1, consumer2, consumer3. For each of these consumers, we add event listeners for MessageAckEvent.ACKNOWLEDGE and MessageEvent.MESSAGE.
     We call consumer1.subscribe(). When we receive the acknowledge message, we call consumer2.subscribe() (likewise with consumer3)
     The problem is it takes over 2 minutes to receive the acknowledge message from the call to consumer1.subscribe(). (With max-streaming-connections-per-session set to 1, the acknowledge message is received in a few seconds.)
     So, increasing max-streaming-connections-per-session removes the error about reaching a limit, but it appears to come with a cost of a big delay in a long delay on the call to subscribe? Or is there something we are missing?

I guess I will answer my own question. Hopefully this will be useful to someone else in the future...
The problem was coming from IE being limited to 1 connection by the registry. The solution can be found at:
http://support.microsoft.com/kb/282402
I manually performed the steps to update the registry, though microsoft provides a "Fix It"; MicrosoftFixit50098.msi
One other key element was to make sure to have kickstart-bytes="2048".

Error by sending a Web Service request

Hi,
we generated a WSDL from an outbound-interface and build a web application with it. When we send a Web Service request to SAP-XI from our Web Dynpro client application, we get an error "CALL_CONSUMER_ERROR" (of category "XI_J2EE_MESSAGING_SYSTEM"). We find the following entry in the message-log of the adapter engine:
Error: Return of synchronous errormessage to the calling application: com.sap.aii.af.ra.ms.api.RecoverableException: java.lang.RuntimeException: Error while silently connecting: org.w3c.www.protocol.http.HttpException: iaik.security.ssl.SSLException: Server certificate rejected by ChainVerifier.
Error: The Transmission of the message with https://hpsaps01.inveos.com:8001/sap/xi/engine?type=entry failed, because: com.sap.aii.af.ra.ms.api.RecoverableException: java.lang.RuntimeException: Error while silently connecting: org.w3c.www.protocol.http.HttpException: iaik.security.ssl.SSLException: Server certificate rejected by ChainVerifier
does anybody know, how to solve this problem?
Greetings
Hildegard

Hi Stefan,
correct certificates are established in the meantime and the error-message in the adapterlog has changed. The errorcode still remains "CALL_CONSUMER_ERROR" of category "XI_J2EE_MESSAGING_SYSTEM".
Adapter-log:
Error: Return of synchronous errormessage to the calling application: com.sap.aii.af.ra.ms.api.RecoverableException: java.lang.RuntimeException: Error while silently connecting: org.w3c.www.protocol.http.HttpException: java.net.ConnectException: Connection refused.
Error: The Transmission of the message with https://hpsaps01.inveos.com:8001/sap/xi/engine?type=entry failed, because: com.sap.aii.af.ra.ms.api.RecoverableException: java.lang.RuntimeException: Error while silently connecting: org.w3c.www.protocol.http.HttpException: java.net.ConnectException: Connection refused
Are there missing any more permissions or is this another error in the configuration?
Regards
Hildegard

Permissions Web Service Requests

Okay, I'm moving from "Groups" to "Permissions".
This post is just an FYI…not sure it's a bug or a feature…or even a little bit of both at the same time.
In the "Permissions" web service requests (AddPermission, etc.) if you do not specify either a ParentHandle or ParentPath, the web service request is applied to your site root. You can still use a single forward slash as ParentPath for "root"…it has the same effect as leaving ParentPath and ParentHandle empty.
If I recall correctly, most requests that take either a handle or path will return an error if neither is specified. I think this may be one of a small subset of requests that assumes "root" if both are missing.

More notes on permissions…again, I think things work as intended, but I thought I'd mention this tidbit in the event that it might be useful to others.
MergePermission can only work with an existing permission (access-level/credential pair)…this is as expected. If you try to "merge" a permission for a credential which does not exist, or if you do not specify a credential, you get an error saying that MergePermission cannot find the target credential. In effect, MergePermission changes the access-level for any permission it can find by-way-of an existing credential.
Similarly, you cannot ask MergePermission to change the form of a credential. For example, you cannot use MergePermission to "change the credential whose associated access-level is 'Download' from 'Test@urn:mace…' to 'Student@urn:mace…'." MergePermission must always find that a target credential exists.
However, when dealing with an existing permission, there is no effective difference between AddPermission and MergePermission. That is, if you add a permission whose credential already exits, then you overwrite it as-if you had merged it. Again, this works as expected. A "student", say, cannot have both "Downlaod" and "No Access" within the same iTunes U page. The only warning I would give is that AddPermission can act destructively…you are not warned, when using it, that if the permission you wish to add corresponds to a permission which already exists, then that permission will be overwritten.

Debugging my Web Service Request

Hi,
I am trying to use standard WS tools (like soapUI) to consume the CW14 WS.
The first operation I call is Authentication – login.
I get a good response (“true”) and a “set cookie” back in the soap header.
I am using this cookie in every Request that follows, to authenticate the session.
Note 1: if I use a wrong cookie, or set it up incorrectly, I get a “session not authenticated” response, so I know I’m doing it write when I do.
Now I am trying to call a simple operation like ReadProjects.
The WSDL for ReadProjects has a set of restrictions on values I am allowed to pass, and I follow them.
Note 2: there are some mismatches, where for example <Field> can be A,B or C (according to the restrictions in the WSDL) but if I use A, I get a “wrong field value” response. I found that I have to use lower case (‘a’) instead.
To make the operation simple, I do as suggested in the documentation and WSDL restriction, and I pass the minimum amount of arguments required ex:
<Field>title</Field>
<Filter>ProjectName=MyProjName </Filter>
Seems like no matter what I try, I get back “error: general error” as a response.
Any help solving this and getting me on the right path, would be simply amazing.

No that did not fix the problem, I still get that error
Web Service Request Failed
The following fault was returned from the web service call:
Code Server.NoService
String The AXIS engine could not find a target service to invoke! targetService is rpc/webtopsession

When there is web service request, we need to write to text file

Hello, Im currently using a web service request (particularly the read request variable). What my application does is that when a user enters the url
http://127.0.0.1:8001/WebService/Process?1=1&2=0&3=1&4=0&5=0
LED 1 and 3 turns on, while the other LEDs are turned off. I would like also to keep text file logs on what is the current time now, and the status of the LEDs. I want only to write to the file everytime the user enters the query in the URL (I dont want to write the logs every second or so, just only when the user presses the go button in the browser)
I can now write to a text file the current datetime stamp, and already setup the web services. But I cant figure out how can I execute this write process everytime the user fires up a web request.
Basically, how can I write to a text file the status of the LEDs each time there is a URL request?
Attached is the project. Thanks
Attachments:
DOE_LabView_v2.zip ‏15 KB

One reason you might not be getting any errors is that you aren't looking for errors. Connect up the error clusters and then display what you get.
Where are you getting the path that you are writing to?
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

Help needed: Handling web service requests from a J2SE application

I want to write an J2SE application that is able to receive and parse web service requests. I want the application to, when started, start listen for incoming requests on a specific port.
So far, I have embedded Apache Tomcat and Apache Axis in my application so that they parse the incoming requests and pass them on to my application logic.
This seems like a very cumbersome way of doing it. I have included an almost full J2EE server in my application just to be able to parse web service requests.
Is there an easier way? What technologies could I use? Any help would be greatly appreciated.

Thanks for the help!
It seems awfully complex though. Couldn't one just
listen to incoming requests on a socket and use some
good tool to parse them?
Of course you could. One of the projects in that list is a 1 class java file. It could listen for requests, then you could parse the posted SOAP messages using JAXP and pass the requests on to your application. This will require a good understanding of SOAP however, and it may end up taking more time than simply using the JWSDP with a slightly beefier server.
Given that there is only a handful carefully
specified requests that the application needs to be
able to respond to it seems overkill to include a
full servlet enabled server...

Should I have one JCo connection per RFC model?

Hello SDN,
I got a JCo doubt.
Should I have one JCo connection per RFC model in a DC? or Can I have the same JCo connection for several models in such Web Dynpro Development Component?
I will appreciate any help.
Thank you.

Hi Gustavo,
Ideally, we use one JCo connection for all the models in all the DC's in a big project.
If you see the SAP delivered XSS/ESS/MSS solutions they are also using one JCO (SAP_R3_Human_Resources) for all the dc's in one solution.
Suppose you are not using SSO and you have different models with different JCO, now if you want to change the backend client, you have to change all the JCO connections.
So having one JCO, helps easy maintenance of connections across different applications in a big project/solution.
Regards,
Shubham

Web Service Request Failed

Hello,
Errors in the EE 4 with RedHat ES 3.
Web Service Request Failed
The following fault was returned from the web service call:
Code HTTP
String (404)/axis/services/rpc/webtopsession
------ log -----
Starting service Tomcat-Standalone
Apache Tomcat/4.1.29
Apr 15, 2005 12:26:03 PM org.apache.jk.common.ChannelSocket init
INFO: JK2: ajp13 listening on /0.0.0.0:8009
Apr 15, 2005 12:26:03 PM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/86 config=null
AxisFault
faultCode: {http://xml.apache.org/axis/}HTTP
faultSubcode:
faultString: (404)/axis/services/rpc/webtopsession
faultActor:
faultNode:
faultDetail:
{}string: return code: 404
<html><head><title>Apache Tomcat/4.1.29 - Error
report</title><STYLE></STYLE>
</head><body><h1>HTTP Status 404 -
/axis/services/rpc/webtopsession</h1><HR size="1"
noshade><p><b>type</b> Status
report</p><p><b>message</b>
<u>/axis/services/rpc/webtopsession</u></p><p><b>description</b>
<u>The requested resource (/axis/services/rpc/webtopsession) is not
available.</u></p><HR size="1"
noshade><h3>Apache
Tomcat/4.1.29</h3></body></html>
(404)/axis/services/rpc/webtopsession
at
org.apache.axis.transport.http.HTTPSender.readFromSocket(HTTPSender.java:630)
at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:128)
at
org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:71)
at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:150)
at org.apache.axis.SimpleChain.invoke(SimpleChain.java:120)
at org.apache.axis.client.AxisClient.invoke(AxisClient.java:180)
at org.apache.axis.client.Call.invokeEngine(Call.java:2564)
at org.apache.axis.client.Call.invoke(Call.java:2553)
at org.apache.axis.client.Call.invoke(Call.java:2248)
at org.apache.axis.client.Call.invoke(Call.java:2171)
at org.apache.axis.client.Call.invoke(Call.java:1691)
at
com.tarantella.tta.webservices.client.apis.apache.BaseRequest.callServiceWork(BaseRequest.java:316)
at
com.tarantella.tta.webservices.client.apis.apache.BaseRequest.callService(BaseRequest.java:213)
at
com.tarantella.tta.webservices.client.apis.apache.BaseRequest.callService(BaseRequest.java:205)
at
com.tarantella.tta.webservices.client.apis.apache.WebtopSessionRequest.startSession(WebtopSessionRequest.java:62)
at
com.tarantella.tta.webservices.client.views.SessionBean.startSession(SessionBean.java:545)
at
org.apache.jsp.sessionmanager_jsp.createNewSession(sessionmanager_jsp.java:276)
at
org.apache.jsp.sessionmanager_jsp.joinSessionByClientId(sessionmanager_jsp.java:236)
at
org.apache.jsp.sessionmanager_jsp._jspService(sessionmanager_jsp.java:619)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:210)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
at
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:575)
at
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:498)
at
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:822)
at org.apache.jsp.index_jsp._jspService(index_jsp.java:483)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:210)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
com.tarantella.tta.webservices.valves.InputFilter.invoke(InputFilter.java:74)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:309)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:387)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:673)
at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:615)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:786)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:666)
at java.lang.Thread.run(Thread.java:534)

Hello,
We have same problem on SGD4.2 on Solaris 10 with IE HTML Client.
Do you solve it ?
How ?
Please help.
Regards.

[Web Service] request arg is array

Dear all,
I insert multi-node in web service request.
Context in EduCusController:
Request_EducationWSViDocument_createEducationList
+arg1(0..n)
-majorField
In viewController
IArg1Node DestinationNode =wdThis.wdGetEduCusController().wdGetContext().nodeArg1();
for (int i = 0; i < 5; i++) {
ComplexType_EducationJB newejb=new ComplexType_EducationJB();
IArg1Element newElement =DestinationNode.createArg1Element(newejb);
newejb.setMajorField(     i);
DestinationNode.addElement(newElement);
then i run
<b>executeRequest_EducationWSViDocument_createEducationList( );</b>
it have Exception : <b>Exception in method CreateEducationList ~</b>
Can anyone help me.

HI Naidu,
how can i do to get complete more stack trace of exception.
public void executeRequest_EducationWSViDocument_createEducationList( )
    //@@begin executeRequest_EducationWSViDocument_createEducationList()
          //$$begin Service Controller(1148767839)
          IWDMessageManager manager = wdComponentAPI.getMessageManager();
          try {
               wdContext
                    .currentRequest_EducationWSViDocument_createEducationListElement()
                    .modelObject()
                    ._setHTTPDestinationName("Education_WS");
               wdContext
                    .currentRequest_EducationWSViDocument_createEducationListElement()
                    .modelObject()
                    .execute();
               wdContext.nodeResponseResult().invalidate();
          } catch (Exception e) {
               e.printStackTrace();
               manager.reportException(e.getMessage(), false);
          //$$end
    //@@end
PS. i use Web Services Navigator insert multi-node, and it run OK.

How to bind list data to XML Web service request

How do I bind specific columns in a DataGrid to the Web
service request? I'm having trouble finding any documentation that
addresses that specific pattern, i.e. sending a complex list to the
server via a Flex Web service send() command. I'm fairly new to
Flex programming and don't know if what I want to do is possible.
Here what I've been able to do so far.
1. Using a Web service called a service on the server and
retrieved a complex list.
2. Poplulated a DataGrid with the result
3. The user has selected multiple rows from the DataGrid
using a checkbox column
4. The user pressed a button that calls a Web service send().
This Web service should only send data from only two columns and
only for those rows the user has checked.
5. I can loop over the DataGrid and find the selected rows
and put them in another ArrayCollection called 'selectedRows'.
The issue is that I don't know how to bind 'selectedRows' to
the Web service. Right now I'm reading up on "Working with XML" in
the Programming with ActionScript 3.0 chapter. But I'm just fishing
here. No bites yet.

Don't bind. Build the request object programatically, as you
are doing with your selectedRows AC, and send(myObject) that.
Tracy

Automatically send web service request on restart

Hi,
Is it possible to send a web service request (or invoke a web method) on restart of a web application that is contained within oc4j.
I want to try and improve the performance of my web service sine it takes a long time to execute the first method call
Thanks in Advance

One possibility would be to use a ServletContextListener:
http://download.oracle.com/docs/cd/B32110_01/web.1013/b28959/listener.htm#BABFCGDD

Web service request ....one db connection per session OR all share one...

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