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 io.netty.handler.codec.marshalling;
17
18 import io.netty.buffer.ByteBuf;
19 import io.netty.channel.Channel;
20 import io.netty.channel.ChannelHandler.Sharable;
21 import io.netty.channel.ChannelHandlerContext;
22 import io.netty.handler.codec.MessageToByteEncoder;
23
24 import org.jboss.marshalling.Marshaller;
25
26 /**
27 * {@link MessageToByteEncoder} implementation which uses JBoss Marshalling to marshal
28 * an Object.
29 *
30 * See <a href="http://www.jboss.org/jbossmarshalling">JBoss Marshalling website</a>
31 * for more information
32 *
33 * Use {@link MarshallingEncoder} if possible.
34 *
35 */
36 @Sharable
37 public class CompatibleMarshallingEncoder extends MessageToByteEncoder<Object> {
38
39 private final MarshallerProvider provider;
40
41 /**
42 * Create a new instance of the {@link CompatibleMarshallingEncoder}
43 *
44 * @param provider the {@link MarshallerProvider} to use to get the {@link Marshaller} for a {@link Channel}
45 */
46 public CompatibleMarshallingEncoder(MarshallerProvider provider) {
47 this.provider = provider;
48 }
49
50 @Override
51 protected void encode(ChannelHandlerContext ctx, Object msg, ByteBuf out) throws Exception {
52 Marshaller marshaller = provider.getMarshaller(ctx);
53 marshaller.start(new ChannelBufferByteOutput(out));
54 marshaller.writeObject(msg);
55 marshaller.finish();
56 marshaller.close();
57 }
58
59 }