Package jade.util

Class InputQueue

java.lang.Object

jade.util.InputQueue

public class InputQueue
extends Object

This class implements a FIFO queue of objects that can be put and got in a synchronized way. This is useful when an external thread, e.g. a GUI, has to communicate with an agent: The external thread puts objects in the queue and the agent gets and processes them. The queue can be associated to a Behaviour. This Behaviour will be restarted each time an object is inserted in the queue. This class can be effectively used in combination with the Event class to support a synchronization between the external therad (posting the event in the InputQueue) and the Agent thread (processing the event).

Author:

Giovanni Caire - TILab

See Also:

Event

Constructor Summary

Constructors

Constructor	Description
InputQueue()	Default constructor.

Method Summary

Modifier and Type	Method	Description
void	associate(Behaviour b)	Associate this InputQueue object with the indicated Behaviour so that it will be restarted each time a new object is inserted.
void	clear()	Remove all elements from this queue.
Object	get()	Extract the first object in the queue (if any).
void	put(Object obj)	Insert an object into the queue.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

InputQueue

public InputQueue()

Default constructor.

Method Detail

associate

public void associate(Behaviour b)

Associate this InputQueue object with the indicated Behaviour so that it will be restarted each time a new object is inserted.

Parameters:

b - The Behaviour to associate.

put

public void put(Object obj)

Insert an object into the queue. If there is a Behaviour associated to this InputQueue it will be restarted.

Parameters:

obj - The object to insert.

get

public Object get()

Extract the first object in the queue (if any).

Returns:

The first object in the queue or null if the queue is empty.

clear

public void clear()

Remove all elements from this queue.