BpelExecution constructor is doing :
super(process)

That's OK. The problem is that Execution(Process) constructor launches the execution...
So I have problems setting properties on my BpelExecution before launching it...
My case is :

bpelExecution = new BpelExecution(bpelProcess);
bpelExecution.setContext(context);
bpelExecution.addMessageToConsume(matchingStartActivity, incomingMessage);

When I am in an execute method and I get the context, it is null as I hadn't time to set it before launching the execution...
I made some workaround to do that (by modifying BpelExecution constrcutor) but I think it is not a correct use...
Can you explain me what is the correct way to create an execution and launch it after ?

I remember the business code of ServiceInvocationHandler :

bpelExecution = correlator.getNewBpelExecutionStartNode(bpelProcess, incomingMessage, portType, operation, partnerLink, context);
if (bpelExecution != null) {
bpelExecution.proceed();
} else {
correlator.storeIncomingMessage(incomingMessage, portType, operation, partnerLink, context);
}

so I think, the proceed in big characters shoiuld launch the execution (not launched before).

correlator code :
bpelExecution = new BpelExecution(bpelProcess);
bpelExecution.setContext(context);
bpelExecution.addMessageToConsume(matchingStartActivity, incomingMessage);