/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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
*
* http://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 org.apache.spark.network.netty;
import java.util.concurrent.TimeUnit;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.oio.OioEventLoopGroup;
import io.netty.channel.socket.oio.OioSocketChannel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class FileClient {
private static final Logger LOG = LoggerFactory.getLogger(FileClient.class.getName());
private final FileClientHandler handler;
private Channel channel = null;
private Bootstrap bootstrap = null;
private EventLoopGroup group = null;
private final int connectTimeout;
private final int sendTimeout = 60; // 1 min
FileClient(FileClientHandler handler, int connectTimeout) {
this.handler = handler;
this.connectTimeout = connectTimeout;
}
public void init() {
group = new OioEventLoopGroup();
bootstrap = new Bootstrap();
bootstrap.group(group)
.channel(OioSocketChannel.class)
.option(ChannelOption.SO_KEEPALIVE, true)
.option(ChannelOption.TCP_NODELAY, true)
.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, connectTimeout)
.handler(new FileClientChannelInitializer(handler));
}
public void connect(String host, int port) {
try {
// Start the connection attempt.
channel = bootstrap.connect(host, port).sync().channel();
// ChannelFuture cf = channel.closeFuture();
//cf.addListener(new ChannelCloseListener(this));
} catch (InterruptedException e) {
LOG.warn("FileClient interrupted while trying to connect", e);
close();
}
}
public void waitForClose() {
try {
channel.closeFuture().sync();
} catch (InterruptedException e) {
LOG.warn("FileClient interrupted", e);
}
}
public void sendRequest(String file) {
//assert(file == null);
//assert(channel == null);
try {
// Should be able to send the message to network link channel.
boolean bSent = channel.writeAndFlush(file + "\r\n").await(sendTimeout, TimeUnit.SECONDS);
if (!bSent) {
throw new RuntimeException("Failed to send");
}
} catch (InterruptedException e) {
LOG.error("Error", e);
}
}
public void close() {
if (group != null) {
group.shutdownGracefully();
group = null;
bootstrap = null;
}
}
}