guarana.toolkit.task.routers
Class Merger
java.lang.Object
guarana.util.observer.smart.SmartObservable
guarana.framework.task.Task
guarana.toolkit.task.routers.Router
guarana.toolkit.task.routers.Merger
- All Implemented Interfaces:
- ISource, guarana.util.observer.smart.ISmartObserver
public class Merger
- extends Router
Mergers inbound messages from different input slots to just one output slot.
This task can have several different input gateways, but just one output gateway. It's not necessary to wait till
all input gateways have messages to give pass to them, instead each inbound message received by the merger is given
pass independently.
A merger does not change the state of inbound messages, just route them to the single output slot!
It means the MESSAGE_ID is kept the same!
Graphical notation:
This is an Integration Pattern implementation
Problem:
Solution:
Details:
- Number of Inputs: n
- Number of Outputs: 1
- Since:
- Guaranį SDK 1.0.0
- Author:
- Rafael Z. Frantz
Constructor Summary |
Merger(String name,
int numberOfInputs)
Constructs a new merger task. |
Merger(String name,
int numberOfInputs,
int numberOfOutputs)
Constructs a new merger task. |
Method Summary |
void |
execute()
This method executes 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 |
Merger
public Merger(String name,
int numberOfInputs)
- Constructs a new merger task.
- Parameters:
name
- The name of the merger task.numberOfInputs
- The number of input slots to merge.
Merger
public Merger(String name,
int numberOfInputs,
int numberOfOutputs)
- Constructs a new merger 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.
execute
public void execute()
throws TaskExecutionException
- This method executes the business logic of this task. It is automatically invoked by workers.
- Overrides:
execute
in class Task
- Throws:
TaskExecutionException
- to report any exception that has occurred during the execution of this method.- See Also:
TaskExecutionException
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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