KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > objectstyle > cayenne > distribution > LocalConnector


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
4  * ObjectStyle Group - http://objectstyle.org/
5  *
6  * Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
7  * of the software. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution, if any,
22  * must include the following acknowlegement:
23  * "This product includes software developed by independent contributors
24  * and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
27  *
28  * 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
29  * or promote products derived from this software without prior written
30  * permission. For written permission, email
31  * "andrus at objectstyle dot org".
32  *
33  * 5. Products derived from this software may not be called "ObjectStyle"
34  * or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
35  * names without prior written permission.
36  *
37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40  * DISCLAIMED. IN NO EVENT SHALL THE OBJECTSTYLE GROUP OR
41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48  * SUCH DAMAGE.
49  * ====================================================================
50  *
51  * This software consists of voluntary contributions made by many
52  * individuals and hosted on ObjectStyle Group web site. For more
53  * information on the ObjectStyle Group, please see
54  * <http://objectstyle.org/>.
55  */
56 package org.objectstyle.cayenne.distribution;
57
58 import org.objectstyle.cayenne.client.CayenneClientException;
59 import org.objectstyle.cayenne.util.Util;
60
61 /**
62  * A "local" connector used mainly to enable testing of all parts of a distributed
63  * application in a single virtual machine. To better reproduce test conditions, it can
64  * optionally serialize all messages passed through it, and then pass a deserialized
65  * version to the handler.
66  *
67  * @since 1.2
68  * @author Andrus Adamchik
69  */
70 public class LocalConnector implements CayenneConnector {
71
72     protected ClientMessageHandler handler;
73     protected boolean serializingMessages;
74
75     public LocalConnector(ClientMessageHandler handler) {
76         this(handler, false);
77     }
78
79     public LocalConnector(ClientMessageHandler handler, boolean serializingMessages) {
80         this.handler = handler;
81         this.serializingMessages = serializingMessages;
82     }
83
84     public boolean isSerializingMessages() {
85         return serializingMessages;
86     }
87
88     public ClientMessageHandler getHandler() {
89         return handler;
90     }
91
92     /**
93      * Does nothing. This connector is local, so there is nothing to connect to.
94      */
95     public void connect() throws CayenneClientException {
96     }
97
98     /**
99      * Dispatches a message to an internal handler.
100      */
101     public Object JavaDoc sendMessage(ClientMessage message) throws CayenneClientException {
102         if (isSerializingMessages()) {
103
104             try {
105                 message = (ClientMessage) Util.cloneViaSerialization(message);
106             }
107             catch (Exception JavaDoc ex) {
108                 throw new CayenneClientException("Error serializing message", ex);
109             }
110         }
111         return message.onReceive(handler);
112     }
113
114 }
115
Popular Tags