How to extract thread Id in Mule ESB

Question

I got the useful knowledge on usage of Message Id and Unique Id by using this http://blogs.mulesoft.org/total-traceability/ . Need clarification on which one is the thread. In Mule debugger View, we could see MessageRoot ID and Unique Id only. But how could I take a Thread ID.

Is it Message id(Message root Id) and Thread Id are same?. I believe it is not. Please confirm. If not, how can we take the thread id. Because I have multiple flows and calls in my flow.

Looking for understanding the scenario.

Thanks in advance.

Answer 1

MessageId is a UUID generated for every MuleMessage object instance generated in Mule. By default, the RootId is the same as the MessageId. However, there are some Endpoints (such as the JMS) that share the RootId, sending it as a property. Imagine you have a flow1 that sends a message (with id 'xxx-xxx-xxx') to a JMS queue "Foo" and a flow2 that receives a message from the same JMS queue, the message in the flow2 will have an id 'xxx-xxx-yyy' and the RootId 'xxx-xxx-xxx'. This way you have a relation between the messages generate in the flows.

The threadId is a long value that identifies a java thread. You can obtain the id the current thread using the code Thread.currentThread().getId(). In MEL it would be #[java.lang.Thread.currentThread().getId()]