guarana.toolkit.task.modifiers
Class ContextBasedContentEnricher

java.lang.Object
  extended by guarana.util.observer.smart.SmartObservable
      extended by guarana.framework.task.Task
          extended by guarana.toolkit.task.modifiers.Modifier
              extended by guarana.toolkit.task.modifiers.ContextBasedContentEnricher
All Implemented Interfaces:
ISource, guarana.util.observer.smart.ISmartObserver

public abstract class ContextBasedContentEnricher
extends Modifier

Adds content to an inbound message's body using content from another context inbound message. The header from the inbound message is kept to the outbound message. Outbound message has a new MESSAGE_ID and the inbound message as its parent.

Graphical notation:


This is an Integration Pattern implementation

Problem: How do you add dynamic information to a message, so the receiver has all the required data?

Solution: Use a context content enricher which receives the inbound message and a context message with information from an external source and enriches the former message.

Details:

Since:
Guaranį SDK 1.3.0
Author:
Rafael Z. Frantz

Field Summary
 
Fields inherited from class guarana.framework.task.Task
input, output
 
Constructor Summary
ContextBasedContentEnricher(String name)
          Constructs a new context content enricher task.
ContextBasedContentEnricher(String name, int numberOfInputs, int numberOfOutputs)
          Constructs a new context content enricher task.
 
Method Summary
abstract  void doWork(Exchange exchange)
          This method implements the business logic of this task.
 
Methods inherited from class guarana.framework.task.Task
execute, getName, getTriggerInterval, isTriggerTask, setName, setTriggerInterval, update
 
Methods inherited from class guarana.util.observer.smart.SmartObservable
addSmartObserver, containsSmartObserver, containsSmartObserver, countSmartObservers, deleteSmartObserver, deleteSmartObservers, hasChanged, notifySmartObservers, notifySmartObservers
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ContextBasedContentEnricher

public ContextBasedContentEnricher(String name)
Constructs a new context content enricher task.

Parameters:
name - The name of the content enricher task.

ContextBasedContentEnricher

public ContextBasedContentEnricher(String name,
                                   int numberOfInputs,
                                   int numberOfOutputs)
Constructs a new context content enricher task.

Parameters:
name - The name of this task.
numberOfInputs - The number of input gateways this task must have.
numberOfOutputs - The number of output gateways this task must have.
Method Detail

doWork

public abstract void doWork(Exchange exchange)
                     throws TaskExecutionException
This method implements the business logic of this task.
Enriches the body of an inbound message with contextual information from the body of another inbound message.

Overrides:
doWork in class Task
Parameters:
exchange - An exchange object that holds the inbound messages of this task.
Throws:
TaskExecutionException - to report any exception that has occurred during the execution of this method.


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