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From george mullen <george.mul...@standardchartered.com>
Subject openwire CSharpGeneratorTask fails to create C# classes from java src
Date Mon, 04 Feb 2008 12:36:57 GMT


I am trying to user  org.apache.activemq.openwire.tool.CSharpGeneratorTask 
to generate C# classes  for communication between ActiveMQ NMS C# client
application and  ActiveMQ JMS java server-side apps using openwire protocol

I can send simple ITextMessage messages fine however when I send
IObjectMessage  I get the followling exception

WARN 
[org.springframework.jms.listener.DefaultMessageListenerContainer#0-1hread]
listener.DefaultMessageListenerContainer - Execution of JMS message listener
failed
javax.jms.JMSException: Failed to build body from bytes. Reason:
java.io.StreamCorruptedException: invalid stream header: 00010000
	at
org.apache.activemq.util.JMSExceptionSupport.create(JMSExceptionSupport.java:33)
	at
org.apache.activemq.command.ActiveMQObjectMessage.getObject(ActiveMQObjectMessage.java:172)
	at
org.springframework.jms.support.converter.SimpleMessageConverter.extractSerializableFromMessage(SimpleMessageConverter.java:222)
	at
org.springframework.jms.support.converter.SimpleMessageConverter.fromMessage(SimpleMessageConverter.java:109)
	at
org.springframework.jms.listener.adapter.MessageListenerAdapter.extractMessage(MessageListenerAdapter.java:396)
	at
org.springframework.jms.listener.adapter.MessageListenerAdapter.onMessage(MessageListenerAdapter.java:327)
	at
org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:485)
	at
org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:442)
	at
org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:414)
	at
org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:309)
	at
org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:254)
	at
org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:870)
	at
org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:810)
	at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.StreamCorruptedException: invalid stream header: 00010000
	at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:783)
	at java.io.ObjectInputStream.<init>(ObjectInputStream.java:280)
	at
org.apache.activemq.util.ClassLoadingAwareObjectInputStream.<init>(ClassLoadingAwareObjectInputStream.java:32)
	at
org.apache.activemq.command.ActiveMQObjectMessage.getObject(ActiveMQObjectMessage.java:164)
	... 12 more





I guess this is to do with mismatch between the C# and Java classes
representing the object to be serialized 
http://www.nabble.com/file/p15267214/CSharpCodeGen.zip CSharpCodeGen.zip 


I have tried using the openwire ant task to generate the c# classes  but it
only produces a single class MarshallerFactory.cs which dosent seem to do
much.


Drilling into the openwire generator classes I not that there is a  method
in  org.apache.activemq.openwire.tool.MultiSourceGenerator called 
isValidClass(JClass jclass) which seems to look for and annotation     

jclass.getAnnotation("openwire:marshaller")



Does this mean  I have to annotate the classes that I am planning to
serialize between NMS and JMS ?
If so how do I do this - are there any examples I could look at?

I am using Java  1.6.0_02-b06 on Windows XP 
I have tried both ActiveMQ-4.1.1 and  ActiveMQ-5.0.0 
attached is  mvn2 project with code and ant build.xml to call
CSharpGeneratorTask


Many thanks 
George.



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