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.timeout;
17
18 import org.jboss.netty.channel.Channel;
19 import org.jboss.netty.channel.ChannelEvent;
20 import org.jboss.netty.channel.ChannelHandlerContext;
21 import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
22
23 /**
24 * An extended {@link SimpleChannelUpstreamHandler} that adds the handler method
25 * for an {@link IdleStateEvent}.
26 * @apiviz.uses org.jboss.netty.handler.timeout.IdleStateEvent
27 */
28 public class IdleStateAwareChannelUpstreamHandler extends SimpleChannelUpstreamHandler {
29
30 @Override
31 public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent e)
32 throws Exception {
33 if (e instanceof IdleStateEvent) {
34 channelIdle(ctx, (IdleStateEvent) e);
35 } else {
36 super.handleUpstream(ctx, e);
37 }
38 }
39
40 /**
41 * Invoked when a {@link Channel} has been idle for a while.
42 */
43 public void channelIdle(ChannelHandlerContext ctx, IdleStateEvent e) throws Exception {
44 ctx.sendUpstream(e);
45 }
46 }