1 /*
2 * $Id: CorrelationEventResequencer.java 10489 2008-01-23 17:53:38Z dfeist $
3 * --------------------------------------------------------------------------------------
4 * Copyright (c) MuleSource, Inc. All rights reserved. http://www.mulesource.com
5 *
6 * The software in this package is published under the terms of the CPAL v1.0
7 * license, a copy of which has been included with this distribution in the
8 * LICENSE.txt file.
9 */
10
11 package org.mule.routing.inbound;
12
13 import org.mule.api.MuleEvent;
14
15
16 /**
17 * <code>CorrelationEventResequencer</code> is used to resequence events according
18 * to their dispatch sequence in the correlation group. When the MessageSplitter
19 * router splits an event it assigns a correlation sequence to the individual message
20 * parts so that another router such as the <i>CorrelationEventResequencer</i> can
21 * receive the parts and reorder or merge them.
22 */
23 public class CorrelationEventResequencer extends AbstractEventResequencer
24 {
25
26 public CorrelationEventResequencer()
27 {
28 super();
29 this.setComparator(new CorrelationSequenceComparator());
30 }
31
32 protected boolean shouldResequenceEvents(EventGroup events)
33 {
34 MuleEvent event = (MuleEvent) events.iterator().next();
35
36 if (event == null)
37 {
38 // nothing to resequence
39 return false;
40 }
41
42 int size = event.getMessage().getCorrelationGroupSize();
43 if (size == -1)
44 {
45 logger.warn("Correlation Group Size not set, but CorrelationResequencer is being used. This can cause messages to be held indefinitely");
46 }
47
48 return size == events.size();
49 }
50
51 }