Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
UMOMessageDispatcherFactory |
|
| 1.0;1 |
1 | /* | |
2 | * $Id: UMOMessageDispatcherFactory.java 7963 2007-08-21 08:53:15Z dirk.olmes $ | |
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.umo.provider; | |
12 | ||
13 | import org.mule.umo.UMOException; | |
14 | import org.mule.umo.endpoint.UMOImmutableEndpoint; | |
15 | ||
16 | /** | |
17 | * <code>UMOMessageDispatcherFactory</code> is a factory interface for managing the | |
18 | * lifecycles of a transport's message dispatchers. The methods basically implement | |
19 | * the {@link org.apache.commons.pool.KeyedPoolableObjectFactory} lifecycle, with a | |
20 | * {@link UMOImmutableEndpoint} as the key and the dispatcher as pooled object. | |
21 | */ | |
22 | public interface UMOMessageDispatcherFactory | |
23 | { | |
24 | ||
25 | /** | |
26 | * Controls whether dispatchers are cached or created per request. Note that if | |
27 | * an exception occurs in the dispatcher, it is automatically disposed of and a | |
28 | * new one is created for the next request. This allows dispatchers to recover | |
29 | * from loss of connection and other faults. When invoked by | |
30 | * {@link #validate(UMOImmutableEndpoint, UMOMessageDispatcher)} it takes | |
31 | * precedence over the dispatcher's own return value of | |
32 | * {@link UMOMessageDispatcher#validate()}. | |
33 | * | |
34 | * @return true if created per request | |
35 | */ | |
36 | boolean isCreateDispatcherPerRequest(); | |
37 | ||
38 | /** | |
39 | * Creates a new message dispatcher instance, initialised with the passed | |
40 | * endpoint. The returned instance should be immediately useable. | |
41 | * | |
42 | * @param endpoint the endoint for which this dispatcher should be created | |
43 | * @return a properly created <code>UMOMessageDispatcher</code> for this | |
44 | * transport | |
45 | * @throws UMOException if the dispatcher cannot be created | |
46 | */ | |
47 | UMOMessageDispatcher create(UMOImmutableEndpoint endpoint) throws UMOException; | |
48 | ||
49 | /** | |
50 | * Invoked <strong>before</strong> the given dispatcher is handed out to a | |
51 | * client, but <strong>not</strong> after {@link #create(UMOImmutableEndpoint)}. | |
52 | * | |
53 | * @param endpoint the endpoint of the dispatcher | |
54 | * @param dispatcher the dispatcher to be activated | |
55 | * @throws UMOException if the dispatcher cannot be activated | |
56 | */ | |
57 | void activate(UMOImmutableEndpoint endpoint, UMOMessageDispatcher dispatcher) throws UMOException; | |
58 | ||
59 | /** | |
60 | * Invoked <strong>after</strong> the dispatcher is returned from a client but | |
61 | * <strong>before</strong> it is prepared for return to its pool via | |
62 | * {@link #passivate(UMOImmutableEndpoint, UMOMessageDispatcher)}. | |
63 | * | |
64 | * @param endpoint the endpoint of the dispatcher | |
65 | * @param dispatcher the dispatcher to be validated | |
66 | * @return <code>true</code> if the dispatcher is valid for reuse, | |
67 | * <code>false</code> otherwise. | |
68 | */ | |
69 | boolean validate(UMOImmutableEndpoint endpoint, UMOMessageDispatcher dispatcher); | |
70 | ||
71 | /** | |
72 | * Invoked immediately <strong>before</strong> the given dispatcher is returned | |
73 | * to its pool. | |
74 | * | |
75 | * @param endpoint the endpoint of the dispatcher | |
76 | * @param dispatcher the dispatcher to be passivated | |
77 | */ | |
78 | void passivate(UMOImmutableEndpoint endpoint, UMOMessageDispatcher dispatcher); | |
79 | ||
80 | /** | |
81 | * Invoked when a dispatcher returned <code>false</code> for | |
82 | * {@link #validate(UMOImmutableEndpoint, UMOMessageDispatcher)}. | |
83 | * | |
84 | * @param endpoint the endpoint of the dispatcher | |
85 | * @param dispatcher the dispatcher to be validated | |
86 | */ | |
87 | void destroy(UMOImmutableEndpoint endpoint, UMOMessageDispatcher dispatcher); | |
88 | ||
89 | } |