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Netty4TcpChannel.java
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Netty4TcpChannel.java
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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.transport.netty4;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelPromise;
import org.elasticsearch.ExceptionsHelper;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.concurrent.CompletableContext;
import org.elasticsearch.transport.TcpChannel;
import org.elasticsearch.transport.TransportException;
import java.net.InetSocketAddress;
public class Netty4TcpChannel implements TcpChannel {
private final Channel channel;
private final String profile;
private final CompletableContext<Void> connectContext;
private final CompletableContext<Void> closeContext = new CompletableContext<>();
Netty4TcpChannel(Channel channel, String profile, @Nullable ChannelFuture connectFuture) {
this.channel = channel;
this.profile = profile;
this.connectContext = new CompletableContext<>();
this.channel.closeFuture().addListener(f -> {
if (f.isSuccess()) {
closeContext.complete(null);
} else {
Throwable cause = f.cause();
if (cause instanceof Error) {
ExceptionsHelper.maybeDieOnAnotherThread(cause);
closeContext.completeExceptionally(new Exception(cause));
} else {
closeContext.completeExceptionally((Exception) cause);
}
}
});
connectFuture.addListener(f -> {
if (f.isSuccess()) {
connectContext.complete(null);
} else {
Throwable cause = f.cause();
if (cause instanceof Error) {
ExceptionsHelper.maybeDieOnAnotherThread(cause);
connectContext.completeExceptionally(new Exception(cause));
} else {
connectContext.completeExceptionally((Exception) cause);
}
}
});
}
@Override
public void close() {
channel.close();
}
@Override
public String getProfile() {
return profile;
}
@Override
public void addCloseListener(ActionListener<Void> listener) {
closeContext.addListener(ActionListener.toBiConsumer(listener));
}
@Override
public void addConnectListener(ActionListener<Void> listener) {
connectContext.addListener(ActionListener.toBiConsumer(listener));
}
@Override
public boolean isOpen() {
return channel.isOpen();
}
@Override
public InetSocketAddress getLocalAddress() {
return (InetSocketAddress) channel.localAddress();
}
@Override
public InetSocketAddress getRemoteAddress() {
return (InetSocketAddress) channel.remoteAddress();
}
@Override
public void sendMessage(BytesReference reference, ActionListener<Void> listener) {
ChannelPromise writePromise = channel.newPromise();
writePromise.addListener(f -> {
if (f.isSuccess()) {
listener.onResponse(null);
} else {
final Throwable cause = f.cause();
ExceptionsHelper.maybeDieOnAnotherThread(cause);
if (cause instanceof Error) {
listener.onFailure(new Exception(cause));
} else {
listener.onFailure((Exception) cause);
}
}
});
channel.writeAndFlush(Netty4Utils.toByteBuf(reference), writePromise);
if (channel.eventLoop().isShutdown()) {
listener.onFailure(new TransportException("Cannot send message, event loop is shutting down."));
}
}
public Channel getLowLevelChannel() {
return channel;
}
@Override
public String toString() {
return "Netty4TcpChannel{" +
"localAddress=" + getLocalAddress() +
", remoteAddress=" + channel.remoteAddress() +
'}';
}
}