org.apache.synapse.commons.executors

Class PRRNextQueueAlgorithm<E>

java.lang.Object

org.apache.synapse.commons.executors.PRRNextQueueAlgorithm<E>

All Implemented Interfaces:

NextQueueAlgorithm<E>

public class PRRNextQueueAlgorithm<E>
extends Object
implements NextQueueAlgorithm<E>

This is a priority based round robin algorithm for getting the next queue

This algorithm works in cycles. Lets say we have queues with following priorities. 7, 5, 2 and assume we name the queues as 1, 2, 3 in the order.

Here is how messages are picked in a single cycle

1, 1, 1, 1, 1, 1, 1 all the messages for the queue with priority 1 are sent for this cycle 2, 2, 2, 2, 2, all the messages for the queue with priority 2 are sent for this cycle 3, 3 all the messages with priority 2 are sent for this cycle

This algorithm choose the queues in the above order if all the queues have messages at the point of selection. If a queue doesn't have messages it will skip the queue and move to the next. If none of the queues have messages it will return null.

Constructor Summary

Constructors

Constructor and Description
PRRNextQueueAlgorithm()

Method Summary

Modifier and Type	Method and Description
InternalQueue<E>	getNextQueue() Should return a queue based on some selection criteria and current state of the queues.
void	init(List<InternalQueue<E>> queues) Initialized with the queues sorted according to the priority.

Methods inherited from class java.lang.Object

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

Constructor Detail

PRRNextQueueAlgorithm

public PRRNextQueueAlgorithm()

Method Detail

getNextQueue

public InternalQueue<E> getNextQueue()

Description copied from interface: NextQueueAlgorithm

Should return a queue based on some selection criteria and current state of the queues.

Specified by:

getNextQueue in interface NextQueueAlgorithm<E>

Returns:

the queue

init

public void init(List<InternalQueue<E>> queues)

Description copied from interface: NextQueueAlgorithm

Initialized with the queues sorted according to the priority.

Specified by:

init in interface NextQueueAlgorithm<E>

Parameters:

queues - list of queues