M filtering
- 2. Routing • The Routing module reviews the different types of Routers and how Routers are used to control how messages are sent and received by components. The message can be route in different ways. Below are explained in this example. • Splitters and Aggregators • Collection splitter and Collection Aggregator • Message chunk splitter and Message chunk aggregator • Scatter gather • For each • Mule flows, Sub flows and flow reference • Filters
- 3. For Each: • The Foreach scope splits a collection into elements and processes them iteratively through the processors embedded in the scope, then returns the original message to the flow.
- 4. • As For Each expects a collection object is expected a java component is used to generate a List object. • Above properties are available in for each scope. Collection field which accepts MEL to provide a collection object to the for each component for iteration. Counter Variable Name is a variable which stores the count of iterations. Batch Size is partition the Collection into sub collections of the specified size. Root Message Variable Name holds the message before being split.
- 5. Main Flow, Sub Flow and Flow reference: • A mule flow (main flow) which accepts message source and message processor where sub flow accepts only message processor. Sub flow can be called via flow reference because it doesn't accept messag source. • Sub flow runs completely in the same context of the flow that calls it, inheriting transcation context, exception handler, all variables and headers, etc. • A Main flow has its own context, transcation context, exception handler, all variables and headers etc.
- 7. Filters: • Filters are used to filter the message using mule expressions. • Above flow accepts a HTTP request and filters the message using Expression filter and also throws an exception if Expression filter is not satisfied using Message Filter.
- 8. • Expression Filter allows you to right a Mule Expression. if the expression returns true then the process continuous to next message processor. or else the flow get discarded without throwing any exception. Here the condition is checking for payload instance is java.util.List or not.
- 9. • If we need to throw an exception when Expression Filter returns false, then Expression filter needs wrapped up the Message Filter and throwOnUnaccecpted attribute should be true as shown in below snippet.
- 10. •Thank You All