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
17 package org.jboss.netty.handler.codec.oneone;
18
19 import org.jboss.netty.channel.ChannelHandlerContext;
20 import org.jboss.netty.channel.MessageEvent;
21
22 /**
23 * Special {@link OneToOneEncoder} which enforce strict ordering of encoding and writing. This
24 * class should get extend by implementations that needs this enforcement to guaranteer no corruption.
25 * Basically all "message" based {@link OneToOneEncoder} mostly don't need this, where "stream" based
26 * are often in need of it.
27 *
28 */
29 public abstract class OneToOneStrictEncoder extends OneToOneEncoder {
30
31 @Override
32 protected boolean doEncode(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
33 // Synchronize on the channel to guaranteer the strict ordering
34 synchronized (ctx.getChannel()) {
35 return super.doEncode(ctx, e);
36 }
37 }
38 }