transformer - Mule returning a MessageCollection from component -


i'm having difficulty returning collection of mulemessage instances component.

mule 3.3.1.

the following code works (i.e., after component, foreach component logger dumps out "abc" , "def" expect).

public object oncall( muleeventcontext eventcontext ) throws exception  {     mulemessage message = eventcontext.getmessage();      mulemessagecollection collection = new defaultmessagecollection( message.getmulecontext() );      string s1 = "abc";     string s2 = "def";     defaultmulemessage m1 = new defaultmulemessage( s1, message.getmulecontext() );     defaultmulemessage m2 = new defaultmulemessage( s2, message.getmulecontext() );     list<mulemessage> list = new arraylist<mulemessage>();     list.add( m1 );     list.add( m2 );      collection.addmessages( list );      return collection; }

if, however, substitute class of own in place of strings, so:

public object oncall( muleeventcontext eventcontext ) throws exception  {     mulemessage message = eventcontext.getmessage();      mulemessagecollection collection = new defaultmessagecollection( message.getmulecontext() );      licenserequest s1 = new licenserequest();     licenserequest s2 = new licenserequest();     defaultmulemessage m1 = new defaultmulemessage( s1, message.getmulecontext() );     defaultmulemessage m2 = new defaultmulemessage( s2, message.getmulecontext() );     list<mulemessage> list = new arraylist<mulemessage>();     list.add( m1 );     list.add( m2 );      collection.addmessages( list );      return collection; }

i exception:

org.mule.transport.http.httpsconnector work caused exception on 'workcompleted'. work being executed was: org.mule.transport.http.httpsmessagereceiver$httpsworker@7b921c57 org.mule.exception.defaultsystemexceptionstrategy caught exception in exception strategy: payload invalidated calling setpayload , message not collection anymore. java.lang.illegalstateexception: payload invalidated calling setpayload , message not collection anymore.     @ org.mule.defaultmessagecollection.checkvalidpayload(defaultmessagecollection.java:107)     @ org.mule.defaultmessagecollection.newthreadcopy(defaultmessagecollection.java:312)     @ org.mule.defaultmuleevent.newthreadcopy(defaultmuleevent.java:779)     @ org.mule.requestcontext.newevent(requestcontext.java:140)     @ org.mule.requestcontext.setexceptionpayload(requestcontext.java:121)     @ org.mule.exception.abstractsystemexceptionstrategy.handleexception(abstractsystemexceptionstrategy.java:54)     @ org.mule.exception.abstractsystemexceptionstrategy.handleexception(abstractsystemexceptionstrategy.java:77)     @ org.mule.transport.http.httpmessagereceiver$httpworker.run(httpmessagereceiver.java:220)     @ org.mule.work.workercontext.run(workercontext.java:311)     @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1110)     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:603)     @ java.lang.thread.run(thread.java:722) exception in thread "[license-generation].httpsconnector.receiver.02" java.lang.illegalstateexception: payload invalidated calling setpayload , message not collection anymore.     @ org.mule.defaultmessagecollection.checkvalidpayload(defaultmessagecollection.java:107)     @ org.mule.defaultmessagecollection.newthreadcopy(defaultmessagecollection.java:312)     @ org.mule.defaultmuleevent.newthreadcopy(defaultmuleevent.java:779)     @ org.mule.requestcontext.newevent(requestcontext.java:140)     @ org.mule.requestcontext.setexceptionpayload(requestcontext.java:121)     @ org.mule.exception.abstractsystemexceptionstrategy.handleexception(abstractsystemexceptionstrategy.java:54)     @ org.mule.exception.abstractsystemexceptionstrategy.handleexception(abstractsystemexceptionstrategy.java:77)     @ org.mule.transport.abstractconnector.handleworkexception(abstractconnector.java:2099)     @ org.mule.transport.abstractconnector.workcompleted(abstractconnector.java:2067)     @ org.mule.work.workercontext.run(workercontext.java:338)     @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1110)     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:603)     @ java.lang.thread.run(thread.java:722)

at point in testing, licenserequest empty class tostring() method returns "ghi".

what doing wrong?

i should add goal return collection of objects created incoming payload. can iterate on objects in calling flow , take appropriate action each.

edit: appears can want in transformer, not component. why this?

i guess not required wrap each of licenserequest object mule message , adding collection. make collection directly , return oncall method.

public object oncall( muleeventcontext eventcontext ) throws exception  {     mulemessage message = eventcontext.getmessage();      licenserequest s1 = new licenserequest();     licenserequest s2 = new licenserequest();      list<licenserequest> list = new arraylist<licenserequest>();     list.add( s1 );     list.add( s2 );      return list; }

hope helps.


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