Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ResequenceMessagesCorrelatorCallback |
|
| 1.0;1 |
1 | /* | |
2 | * $Id: ResequenceMessagesCorrelatorCallback.java 20321 2010-11-24 15:21:24Z dfeist $ | |
3 | * -------------------------------------------------------------------------------------- | |
4 | * Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.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 | package org.mule.routing.correlation; | |
11 | ||
12 | import org.mule.DefaultMuleEvent; | |
13 | import org.mule.DefaultMuleMessage; | |
14 | import org.mule.api.MuleContext; | |
15 | import org.mule.api.MuleEvent; | |
16 | import org.mule.routing.AggregationException; | |
17 | import org.mule.routing.EventGroup; | |
18 | ||
19 | import java.util.Arrays; | |
20 | import java.util.Comparator; | |
21 | ||
22 | import org.apache.commons.logging.Log; | |
23 | import org.apache.commons.logging.LogFactory; | |
24 | ||
25 | /** | |
26 | * A Correlator that correlates messages based on Mule correlation settings | |
27 | * Note that the {@link #aggregateEvents(org.mule.routing.EventGroup)} method only resequences the events and | |
28 | * returns an MuleEvent[] wrapped in a MuleMessage impl. This means that this callback can ONLY be used with a | |
29 | * {@link org.mule.routing.inbound.CorrelationEventResequencer} | |
30 | */ | |
31 | public class ResequenceMessagesCorrelatorCallback extends CollectionCorrelatorCallback | |
32 | { | |
33 | /** | |
34 | * logger used by this class | |
35 | */ | |
36 | 0 | protected transient final Log logger = LogFactory.getLog(ResequenceMessagesCorrelatorCallback.class); |
37 | ||
38 | protected Comparator eventComparator; | |
39 | protected MuleContext muleContext; | |
40 | ||
41 | public ResequenceMessagesCorrelatorCallback(Comparator eventComparator, MuleContext muleContext) | |
42 | { | |
43 | 0 | super(muleContext); |
44 | 0 | this.eventComparator = eventComparator; |
45 | 0 | this.muleContext = muleContext; |
46 | 0 | } |
47 | ||
48 | /** | |
49 | * This method is invoked if the shouldAggregate method is called and returns | |
50 | * true. Once this method returns an aggregated message, the event group is | |
51 | * removed from the router. | |
52 | * | |
53 | * @param events the event group for this request | |
54 | * @return an aggregated message | |
55 | * @throws org.mule.routing.AggregationException | |
56 | * if the aggregation fails. in this scenario the | |
57 | * whole event group is removed and passed to the exception handler | |
58 | * for this componenet | |
59 | */ | |
60 | public MuleEvent aggregateEvents(EventGroup events) throws AggregationException | |
61 | { | |
62 | 0 | MuleEvent[] results = (events == null) ? new MuleEvent[0] : events.toArray(); |
63 | 0 | Arrays.sort(results, eventComparator); |
64 | //This is a bit of a hack since we return a collection of events on one message | |
65 | 0 | return new DefaultMuleEvent(new DefaultMuleMessage(results, muleContext), results[0]); |
66 | } | |
67 | ||
68 | } |