1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/*
* Copyright 2012 - 2013 Anton Tananaev (anton.tananaev@gmail.com)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.traccar;
import java.net.SocketAddress;
import java.util.Properties;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelEvent;
import org.jboss.netty.channel.ChannelHandlerContext;
import static org.jboss.netty.channel.Channels.fireMessageReceived;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.handler.codec.oneone.OneToOneDecoder;
import org.traccar.database.DataManager;
/**
* Base class for protocol decoders
*/
public abstract class BaseProtocolDecoder extends OneToOneDecoder {
private final DataManager dataManager;
private final String protocol;
private final Properties properties;
public final DataManager getDataManager() {
return dataManager;
}
public final String getProtocol() {
return protocol;
}
public final Properties getProperties() {
return properties;
}
public BaseProtocolDecoder(DataManager dataManager, String protocol, Properties properties) {
this.dataManager = dataManager;
this.protocol = protocol;
this.properties = properties;
}
@Override
public void handleUpstream(
ChannelHandlerContext ctx, ChannelEvent evt) throws Exception {
if (!(evt instanceof MessageEvent)) {
ctx.sendUpstream(evt);
return;
}
MessageEvent e = (MessageEvent) evt;
Object originalMessage = e.getMessage();
Object decodedMessage = decode(ctx, e.getChannel(), e.getRemoteAddress(), originalMessage);
if (originalMessage == decodedMessage) {
ctx.sendUpstream(evt);
} else if (decodedMessage != null) {
fireMessageReceived(ctx, decodedMessage, e.getRemoteAddress());
}
}
protected Object decode(
ChannelHandlerContext ctx, Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
return decode(ctx, channel, msg);
}
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception {
return null; // default implementation
}
}
|
