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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you 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:
 *
 *   https://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 io.netty5.handler.timeout;

import io.netty5.bootstrap.ServerBootstrap;
import io.netty5.channel.Channel;
import io.netty5.channel.ChannelHandler;
import io.netty5.channel.ChannelHandlerContext;
import io.netty5.channel.ChannelInitializer;

import java.util.concurrent.TimeUnit;

/**
 * Raises a {@link ReadTimeoutException} when no data was read within a certain
 * period of time.
 *
 * 
 * // The connection is closed when there is no inbound traffic
 * // for 30 seconds.
 *
 * public class MyChannelInitializer extends {@link ChannelInitializer}<{@link Channel}> {
 *     public void initChannel({@link Channel} channel) {
 *         channel.pipeline().addLast("readTimeoutHandler", new {@link ReadTimeoutHandler}(30));
 *         channel.pipeline().addLast("myHandler", new MyHandler());
 *     }
 * }
 *
 * // Handler should handle the {@link ReadTimeoutException}.
 * public class MyHandler implements {@link ChannelHandler} {
 *     {@code @Override}
 *     public void exceptionCaught({@link ChannelHandlerContext} ctx, {@link Throwable} cause)
 *             throws {@link Exception} {
 *         if (cause instanceof {@link ReadTimeoutException}) {
 *             // do something
 *         } else {
 *             super.exceptionCaught(ctx, cause);
 *         }
 *     }
 * }
 *
 * {@link ServerBootstrap} bootstrap = ...;
 * ...
 * bootstrap.childHandler(new MyChannelInitializer());
 * ...
 * 
* @see WriteTimeoutHandler * @see IdleStateHandler */ public class ReadTimeoutHandler extends IdleStateHandler { private boolean closed; /** * Creates a new instance. * * @param timeoutSeconds * read timeout in seconds */ public ReadTimeoutHandler(int timeoutSeconds) { this(timeoutSeconds, TimeUnit.SECONDS); } /** * Creates a new instance. * * @param timeout * read timeout * @param unit * the {@link TimeUnit} of {@code timeout} */ public ReadTimeoutHandler(long timeout, TimeUnit unit) { super(timeout, 0, 0, unit); } @Override protected final void channelIdle(ChannelHandlerContext ctx, IdleStateEvent evt) throws Exception { assert evt.state() == IdleState.READER_IDLE; readTimedOut(ctx); } /** * Is called when a read timeout was detected. */ protected void readTimedOut(ChannelHandlerContext ctx) throws Exception { if (!closed) { ctx.fireChannelExceptionCaught(ReadTimeoutException.INSTANCE); ctx.close(); closed = true; } } }




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