guarana.toolkit.task.routers
Class IdempotentTransfer
java.lang.Object
guarana.util.observer.smart.SmartObservable
guarana.framework.task.Task
guarana.toolkit.task.routers.Router
guarana.toolkit.task.routers.IdempotentTransfer
- All Implemented Interfaces:
- ISource, guarana.util.observer.smart.ISmartObserver
public class IdempotentTransfer
- extends Router
Detects duplicated inbound messages in the message flow.
If log INFO level is activated, a duplicated message causes its MESSAGE_ID to be written to the log.
An idempotent transfer does not change the state of inbound messages.
It means the MESSAGE_ID is kept the same!
Graphical notation:
This is an Integration Pattern implementation
Problem:
Solution:
Details:
- Number of Inputs: 1
- Number of Outputs: 1
- Since:
- Guaranį SDK 1.0.0
- Author:
- Rafael Z. Frantz
Method Summary |
void |
doWork(Exchange exchange)
This method implements the business logic of this task. |
void |
update(guarana.util.observer.smart.SmartObservable slot,
Object arg)
This method is automatically called by the observable slot to notify the slot has received a message. |
Methods inherited from class guarana.util.observer.smart.SmartObservable |
addSmartObserver, containsSmartObserver, containsSmartObserver, countSmartObservers, deleteSmartObserver, deleteSmartObservers, hasChanged, notifySmartObservers, notifySmartObservers |
IdempotentTransfer
public IdempotentTransfer(String name)
- Constructs a new idempotent transfer task.
- Parameters:
name
- The name of the idempotent transfer task.
IdempotentTransfer
public IdempotentTransfer(String name,
int numberOfInputs,
int numberOfOutputs)
- Constructs a new idempotent transfer 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.
doWork
public void doWork(Exchange exchange)
throws TaskExecutionException
- This method implements the business logic of this task.
Ensures only one message with the same identifier (MESSAGE_ID) can keep in the integration flow.
- 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.
update
public void update(guarana.util.observer.smart.SmartObservable slot,
Object arg)
- This method is automatically called by the observable slot to notify the slot has received a message.
For all those tasks that can execute with one or more messages in its input slots, this method will add the
task to the executable task reporter, so it can be executed. In this case the task execution will consume messages
from all input slots.
Please, do not call this method by yourself.
Overrides the implementation at Task
for performance reasons.
- Specified by:
update
in interface guarana.util.observer.smart.ISmartObserver
- Overrides:
update
in class Task
- Parameters:
slot
- The Slot
associated with this task.arg
- THIS PARAMETHER IS NOT USED.
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