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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.net.SocketAddress;
import java.util.Collections;
import java.util.Map;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.client.MetricsConnection;
import org.apache.hadoop.hbase.util.ReflectionUtils;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.hbase.thirdparty.com.google.common.collect.ImmutableMap;
/**
* Factory to create a {@link org.apache.hadoop.hbase.ipc.RpcClient}
*/
@InterfaceAudience.Private
public final class RpcClientFactory {
public static final String CUSTOM_RPC_CLIENT_IMPL_CONF_KEY = "hbase.rpc.client.impl";
private static final ImmutableMap DEPRECATED_NAME_MAPPING = ImmutableMap.of("org.apache.hadoop.hbase.ipc.RpcClientImpl",
BlockingRpcClient.class.getName(), "org.apache.hadoop.hbase.ipc.AsyncRpcClient",
NettyRpcClient.class.getName());
/**
* Private Constructor
*/
private RpcClientFactory() {
}
/** Helper method for tests only. Creates an {@code RpcClient} without metrics. */
public static RpcClient createClient(Configuration conf, String clusterId) {
return createClient(conf, clusterId, null);
}
/**
* Creates a new RpcClient by the class defined in the configuration or falls back to
* RpcClientImpl
* @param conf configuration
* @param clusterId the cluster id
* @param metrics the connection metrics
* @return newly created RpcClient
*/
public static RpcClient createClient(Configuration conf, String clusterId,
MetricsConnection metrics) {
return createClient(conf, clusterId, metrics, Collections.emptyMap());
}
private static String getRpcClientClass(Configuration conf) {
String rpcClientClass = conf.get(CUSTOM_RPC_CLIENT_IMPL_CONF_KEY);
if (rpcClientClass == null) {
return NettyRpcClient.class.getName();
}
String mappedName = DEPRECATED_NAME_MAPPING.get(rpcClientClass);
return mappedName == null ? rpcClientClass : mappedName;
}
/**
* Creates a new RpcClient by the class defined in the configuration or falls back to
* RpcClientImpl
* @param conf configuration
* @param clusterId the cluster id
* @param metrics the connection metrics
* @param connectionAttributes attributes to be sent along to server during connection establish
* @return newly created RpcClient
*/
public static RpcClient createClient(Configuration conf, String clusterId,
MetricsConnection metrics, Map connectionAttributes) {
return createClient(conf, clusterId, null, metrics, connectionAttributes);
}
/**
* Creates a new RpcClient by the class defined in the configuration or falls back to
* RpcClientImpl
* @param conf configuration
* @param clusterId the cluster id
* @param localAddr client socket bind address.
* @param metrics the connection metrics
* @param connectionAttributes attributes to be sent along to server during connection establish
* @return newly created RpcClient
*/
public static RpcClient createClient(Configuration conf, String clusterId,
SocketAddress localAddr, MetricsConnection metrics, Map connectionAttributes) {
String rpcClientClass = getRpcClientClass(conf);
return ReflectionUtils.instantiateWithCustomCtor(
rpcClientClass, new Class[] { Configuration.class, String.class, SocketAddress.class,
MetricsConnection.class, Map.class },
new Object[] { conf, clusterId, localAddr, metrics, connectionAttributes });
}
}
