Explains java part 4

1. Mule Java Custom
Component - 4
Karthik

2. No Arguments method:
• Drag a 'Set Payload' component and set value a string value as
"#[null]". So that payload becomes null. Drag a java component and refer
to a class "EntryPointResolver" as shown earlier.

3. • As payload is null after 'Set payload' component, "noArgumentsMethod()"
method of "EntryPointResolver" Class gets invoked.
Annotated Entry Point Resolver:
• Annotated Entry Point Resolver is used to determine the entry point
of the component using annotations.
Example:
• In below flow 'Set Payload' component has been used to set a String
as "RAM" and 'Property' component has been to create outbound property
(dept = IT). A Java component is used to refer a java class
"AnnotatedEntryPointerResolver".

4. • Below java class has a method multipleArgumentsMethod(@Payload String
name, @OutboundHeaders Map<String, Object> dept) which has two
arguments referred by annotations. Based on the annotation the respective
value gets match to the argument.

5. • For example, payload value matches to the argument 'name'.
@Payload String name
• In the same way, all outbound properties match to the argument 'dept'
which is type java.util.Map.
@OutboundHeaders Map<String, Object> dept

6. Invoking a service using java component:
• In this example a java component is reffered to a class
"HTTPInvocation" which invokes another HTTP service and returns the
HTTP resoponse. Logger component is used to log the response.

7. Java Class:

9. •Thank You All