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/*
* 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.hadoop.hbase.ipc;
import java.io.IOException;
import java.net.SocketAddress;
import java.util.Collections;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseInterfaceAudience;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.client.MetricsConnection;
import org.apache.hadoop.hbase.exceptions.X509Exception;
import org.apache.hadoop.hbase.io.FileChangeWatcher;
import org.apache.hadoop.hbase.io.crypto.tls.X509Util;
import org.apache.hadoop.hbase.util.NettyFutureUtils;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.hbase.thirdparty.io.netty.channel.Channel;
import org.apache.hbase.thirdparty.io.netty.channel.EventLoopGroup;
import org.apache.hbase.thirdparty.io.netty.channel.nio.NioEventLoopGroup;
import org.apache.hbase.thirdparty.io.netty.channel.socket.nio.NioSocketChannel;
import org.apache.hbase.thirdparty.io.netty.handler.ssl.SslContext;
import org.apache.hbase.thirdparty.io.netty.util.concurrent.DefaultThreadFactory;
/**
* Netty client for the requests and responses.
* @since 2.0.0
*/
@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG)
public class NettyRpcClient extends AbstractRpcClient {
final EventLoopGroup group;
final Class channelClass;
private final boolean shutdownGroupWhenClose;
private final AtomicReference sslContextForClient = new AtomicReference<>();
private final AtomicReference keyStoreWatcher = new AtomicReference<>();
private final AtomicReference trustStoreWatcher = new AtomicReference<>();
public NettyRpcClient(Configuration configuration, String clusterId, SocketAddress localAddress,
MetricsConnection metrics) {
this(configuration, clusterId, localAddress, metrics, Collections.emptyMap());
}
public NettyRpcClient(Configuration configuration, String clusterId, SocketAddress localAddress,
MetricsConnection metrics, Map connectionAttributes) {
super(configuration, clusterId, localAddress, metrics, connectionAttributes);
Pair> groupAndChannelClass =
NettyRpcClientConfigHelper.getEventLoopConfig(conf);
if (groupAndChannelClass == null) {
// Use our own EventLoopGroup.
int threadCount =
conf.getInt(NettyRpcClientConfigHelper.HBASE_NETTY_EVENTLOOP_RPCCLIENT_THREADCOUNT_KEY, 0);
this.group = new NioEventLoopGroup(threadCount,
new DefaultThreadFactory("RPCClient(own)-NioEventLoopGroup", true, Thread.NORM_PRIORITY));
this.channelClass = NioSocketChannel.class;
this.shutdownGroupWhenClose = true;
} else {
this.group = groupAndChannelClass.getFirst();
this.channelClass = groupAndChannelClass.getSecond();
this.shutdownGroupWhenClose = false;
}
}
/** Used in test only. */
public NettyRpcClient(Configuration configuration) {
this(configuration, HConstants.CLUSTER_ID_DEFAULT, null, null, Collections.emptyMap());
}
@Override
protected NettyRpcConnection createConnection(ConnectionId remoteId) throws IOException {
return new NettyRpcConnection(this, remoteId);
}
@Override
protected void closeInternal() {
if (shutdownGroupWhenClose) {
NettyFutureUtils.consume(group.shutdownGracefully());
}
FileChangeWatcher ks = keyStoreWatcher.getAndSet(null);
if (ks != null) {
ks.stop();
}
FileChangeWatcher ts = trustStoreWatcher.getAndSet(null);
if (ts != null) {
ts.stop();
}
}
SslContext getSslContext() throws X509Exception, IOException {
SslContext result = sslContextForClient.get();
if (result == null) {
result = X509Util.createSslContextForClient(conf);
if (!sslContextForClient.compareAndSet(null, result)) {
// lost the race, another thread already set the value
result = sslContextForClient.get();
} else if (
keyStoreWatcher.get() == null && trustStoreWatcher.get() == null
&& conf.getBoolean(X509Util.TLS_CERT_RELOAD, false)
) {
X509Util.enableCertFileReloading(conf, keyStoreWatcher, trustStoreWatcher,
() -> sslContextForClient.set(null));
}
}
return result;
}
}
