AxisEngine#receive() ; checkMustUnderstand();

[Saminda Abeyruwan]

Hi Devs,

AxisEngine#receiver()  always check for must understand header before invoking the relevant message receiver. This would really give a hard time in Synapse when we tried to implement qos support such as RM ect.

Synapse has its own SynapseMessageReceiver(SMR) and SynapseDispatcher and all the messages will be passed to this message receiver via SynapseDispatcher. During this first phase we are not apply any QOS. All QOS handles through mediators. Ex: RM will handles through RMMediator(RMM). RMMediator is a part of Synapse. We use these mediators to engage Axis2 modules hence supporting QOS.

So in the case of RM all control messages and application messages will be  passed to RMM. Now if a messages comes with must understand true, it will not pass to SMR at the first phase, because Axis2 engine check for must understand and it will throw an exception.

Intermediaries like Synapse would not need to understand must understand headers and it should be upto the Service endpoint to understand it.

So IMHO, in order to user AxisEngine in SynapseEnvironment, we need a switch to configure must understanding.


Thank you

Saminda