1 /*
2 * Copyright 2012 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package org.jboss.netty.handler.codec.marshalling;
17
18 import org.jboss.marshalling.Marshaller;
19 import org.jboss.netty.channel.Channel;
20 import org.jboss.netty.channel.ChannelHandler.Sharable;
21 import org.jboss.netty.channel.ChannelHandlerContext;
22 import org.jboss.netty.handler.codec.oneone.OneToOneEncoder;
23
24 /**
25 * {@link OneToOneEncoder} implementation which uses JBoss Marshalling to marshal
26 * an Object.
27 *
28 * See <a href="http://www.jboss.org/jbossmarshalling">JBoss Marshalling website</a>
29 * for more informations
30 *
31 * Use {@link MarshallingEncoder} if possible.
32 *
33 */
34 @Sharable
35 public class CompatibleMarshallingEncoder extends OneToOneEncoder {
36
37 private final MarshallerProvider provider;
38
39
40 /**
41 * Create a new instance of the {@link CompatibleMarshallingEncoder}
42 *
43 * @param provider the {@link MarshallerProvider} to use to get the {@link Marshaller} for a {@link Channel}
44 */
45 public CompatibleMarshallingEncoder(MarshallerProvider provider) {
46 this.provider = provider;
47 }
48
49
50 @Override
51 protected Object encode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception {
52 Marshaller marshaller = provider.getMarshaller(ctx);
53 ChannelBufferByteOutput output =
54 new ChannelBufferByteOutput(ctx.getChannel().getConfig().getBufferFactory(), 256);
55 marshaller.start(output);
56 marshaller.writeObject(msg);
57 marshaller.finish();
58 marshaller.close();
59
60 return output.getBuffer();
61 }
62 }