I missed part of Peter Crocker’s session on Advanced Java Topics in WMB v6 yesterday, but when I did manage to get in there, I learned a few useful snippets. Essentially this was an update of his talk from last year, and riffed off of his developerWorks article on the use of Java in Message Broker.
A few of the notes I made:
- although the product ships a sample JavaCompute node that calls a Google API, Google themselves have now withdrawn the API, so the sample doesn’t work 😦
- it is important to be careful with the use of XPath… for example, try to avoid using the // selector as it is usually not the most performant way to select a message element. There should be some articles around on XPath, I need to look up some useful references.
- The latest fixpack enables Java code in a JavaCompute node to propagate to a label in the flow.
Useful stuff to be aware of!