Mule java part-1
- 1. Mule Java Custom Component - 1 GSN-K
- 2. Java CustomComponent • Java components are used write our custom code and custom transformation. java transformers will be used when we cannot transform a message using available Mule transformers. In this example, following components are explained. • Java Component • Java component with singleton • Invoke Component • Java Transformer
- 3. • Reflection Entry Point Resolver • Annotated Entry Point Resolver • Invoking a service using java component Below is the main flow which exposes a HTTP service and refers to multiple sub flows one after another to cover all above concepts.
- 4. Java Component: Java component is used to refer a class which has complex code. Example: Below is sub flow named 'simple-java-component' which has Set Payload and java component. 'Set Payload' component sets payload as "Custom Payload".
- 5. • Java component is reffered to custom made class (UsingCallable) which implements Callable interface. This class is used to print current payload, size of inbound properties and size of invocation properties.
- 6. Above class implements Callable interface. it has onCall(MuleEventContext eventContext) overriden method. This method provides MuleEventContext . We can get all the data using MuleContext instace as shown in above code snippet.Data-Mapper.
- 7. Java Component with Singleton: The singleton object factory does not create a new instance for each request; instead, the instance is shared. Example: Drag java component and double click on the java component to bring up properties. Click "+" symbol next to the 'Object' field Select “core:singleton-object” and click "next".
- 8. Click on "..." button and select class "com.techm.javacustomcomponents.UsingSingletonObject"