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
|
/*
* Copyright 2015 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.Collection;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelEvent;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.ChannelUpstreamHandler;
import org.jboss.netty.channel.Channels;
import org.jboss.netty.channel.MessageEvent;
public abstract class ExtendedObjectDecoder implements ChannelUpstreamHandler {
@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(e.getChannel(), e.getRemoteAddress(), originalMessage);
onMessageEvent(e.getChannel(), e.getRemoteAddress(), originalMessage); // call after decode
if (originalMessage == decodedMessage) {
ctx.sendUpstream(evt);
} else if (decodedMessage != null) {
if (decodedMessage instanceof Collection) {
for (Object o : (Collection) decodedMessage) {
Channels.fireMessageReceived(ctx, o, e.getRemoteAddress());
}
} else {
Channels.fireMessageReceived(ctx, decodedMessage, e.getRemoteAddress());
}
}
}
protected void onMessageEvent(Channel channel, SocketAddress remoteAddress, Object msg) {
}
protected abstract Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception;
}
|
