[ http://jira.codehaus.org/browse/XFIRE-747?page=all ]
Tomasz Sztelak closed XFIRE-747.
--------------------------------
Assignee: Tomasz Sztelak (was: Dan Diephouse)
Resolution: Won't Fix
> Out handlers called twice
> -------------------------
>
> Key: XFIRE-747
> URL: http://jira.codehaus.org/browse/XFIRE-747
> Project: XFire
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.2.2
> Environment: Linux, JDK 1.5.0_06
> Reporter: PJ
> Assigned To: Tomasz Sztelak
> Priority: Critical
>
> Out handlers are called twice if webservice method calls another webservice
> via Client API.
> Service interface:
> @WebService
> public interface ITestService
> {
> public void a();
>
> public void b();
> }
> Service implementation:
> @WebService (endpointInterface="test.ITestService")
> public class TestService implements ITestService
> {
> public void a()
> {
> AnnotationServiceFactory factory = new
> AnnotationServiceFactory();
> Service service = factory.create(TestService.class);
>
> try
> {
> ITestService test = (ITestService) new
> XFireProxyFactory().create(service,
> "http://localhost:8080/test/services/TestService";);
>
> test.b(); // while invoking b() out handler
> pipeline is called, why???
> }
> catch (MalformedURLException e)
> {
> e.printStackTrace();
> }
> }
>
> public void b()
> {
> }
> }
> Example in handler:
> public class TransactionBeginHandler extends AbstractHandler
> {
> public void invoke(MessageContext context) throws Exception
> {
> Context ctx = new InitialContext();
> UserTransaction ut = (UserTransaction)
> ctx.lookup("java:comp/UserTransaction");
>
> ut.begin();
> }
> }
> Example out handler:
> public class TransactionCommitHandler extends AbstractHandler
> {
> public void invoke(MessageContext context) throws Exception
> {
> InitialContext ctx = new InitialContext();
> UserTransaction ut = (UserTransaction)
> ctx.lookup("java:comp/UserTransaction");
>
> ut.commit();
> }
> }
> services.xml:
> <beans xmlns="http://xfire.codehaus.org/config/1.0";>
> <xfire>
> <inHandlers>
> <handler handlerClass="test.TransactionBeginHandler" />
> </inHandlers>
> <outHandlers>
> <handler handlerClass="test.TransactionCommitHandler" />
> </outHandlers>
> </xfire>
> <service>
> <serviceClass>test.TestService</serviceClass>
> <serviceFactory>jsr181</serviceFactory>
> </service>
> </beans>
> Test client:
> public class Test
> {
> public static void main(String[] args) throws MalformedURLException
> {
> AnnotationServiceFactory factory = new
> AnnotationServiceFactory();
> Service service = factory.create(TestService.class);
> ITestService test = (ITestService) new
> XFireProxyFactory().create(service,
> "http://localhost:8080/test/services/TestService";);
>
> test.a();
> }
> }
> When test client calls method a() below sequence happens:
> 1. TransactionBeginHandler is executed on thread one (T1)
> 2. Method a() is executed on T1
> 2a. Another webservice is called from inside a() method, and for
> unknown reason whole out handlers pipeline is invoked, so...
> 2b. TransactionCommitHandler is executed on T1
> 3. TransactionBeginHandler is executed on thread two (T2)
> 4. Method b() is executed on T2
> 5. TransactionCommitHandler is executed on T2
> 6. TransactionCommitHandler is executed on T1
> Exception occurs, because second execution of TransactionCommitHandler on T1
> tries to commit already commited transaction. Besides, if after calling b()
> some database operations occurs in method a() exception will be thrown
> because there is no active transaction.
> In my test I've called another webservice on the same server (thus notation
> of two threads, T1 handles a() invocation, T2 handles b() invocation), but it
> doesn't matter - calling whatever webservice results in invoking handlers
> pipeline.
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