Apache9 commented on code in PR #5631: URL: https://github.com/apache/hbase/pull/5631#discussion_r1477006736
########## hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionRegistryRpcStubHolder.java: ########## @@ -0,0 +1,212 @@ +/* + * 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.client; + +import java.io.Closeable; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.List; +import java.util.Set; +import java.util.concurrent.CompletableFuture; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.ServerName; +import org.apache.hadoop.hbase.ipc.HBaseRpcController; +import org.apache.hadoop.hbase.ipc.RpcClient; +import org.apache.hadoop.hbase.ipc.RpcClientFactory; +import org.apache.hadoop.hbase.ipc.RpcControllerFactory; +import org.apache.hadoop.hbase.security.User; +import org.apache.hadoop.hbase.util.IOExceptionSupplier; +import org.apache.yetus.audience.InterfaceAudience; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import org.apache.hbase.thirdparty.com.google.common.base.Preconditions; +import org.apache.hbase.thirdparty.com.google.common.collect.ImmutableMap; +import org.apache.hbase.thirdparty.com.google.protobuf.RpcCallback; +import org.apache.hbase.thirdparty.com.google.protobuf.RpcChannel; + +import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.ClientMetaService; +import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.ConnectionRegistryService; +import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.GetConnectionRegistryRequest; +import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.GetConnectionRegistryResponse; + +/** + * A class for creating {@link RpcClient} and related stubs used by + * {@link AbstractRpcBasedConnectionRegistry}. We need to connect to bootstrap nodes to get the + * cluster id first, before creating the final {@link RpcClient} and related stubs. + * <p> + * See HBASE-25051 for more details. + */ [email protected] +class ConnectionRegistryRpcStubHolder implements Closeable { + + private static final Logger LOG = LoggerFactory.getLogger(ConnectionRegistryRpcStubHolder.class); + + private final Configuration conf; + + // used for getting cluster id + private final Configuration noAuthConf; + + private final User user; + + private final RpcControllerFactory rpcControllerFactory; + + private final Set<ServerName> bootstrapNodes; + + private final int rpcTimeoutMs; + + private volatile ImmutableMap<ServerName, ClientMetaService.Interface> addr2Stub; + + private volatile RpcClient rpcClient; + + private CompletableFuture<ImmutableMap<ServerName, ClientMetaService.Interface>> addr2StubFuture; + + ConnectionRegistryRpcStubHolder(Configuration conf, User user, + RpcControllerFactory rpcControllerFactory, Set<ServerName> bootstrapNodes) { + this.conf = conf; + if (User.isHBaseSecurityEnabled(conf)) { + this.noAuthConf = new Configuration(conf); + this.noAuthConf.set(User.HBASE_SECURITY_CONF_KEY, "simple"); + } else { + this.noAuthConf = conf; + } + this.user = user; + this.rpcControllerFactory = rpcControllerFactory; + this.bootstrapNodes = Collections.unmodifiableSet(bootstrapNodes); + this.rpcTimeoutMs = (int) Math.min(Integer.MAX_VALUE, + conf.getLong(HConstants.HBASE_RPC_TIMEOUT_KEY, HConstants.DEFAULT_HBASE_RPC_TIMEOUT)); + } + + private ImmutableMap<ServerName, ClientMetaService.Interface> createStubs(RpcClient rpcClient, + Collection<ServerName> addrs) { + LOG.debug("Going to use new servers to create stubs: {}", addrs); + Preconditions.checkNotNull(addrs); + ImmutableMap.Builder<ServerName, ClientMetaService.Interface> builder = + ImmutableMap.builderWithExpectedSize(addrs.size()); + for (ServerName masterAddr : addrs) { + builder.put(masterAddr, + ClientMetaService.newStub(rpcClient.createRpcChannel(masterAddr, user, rpcTimeoutMs))); + } + return builder.build(); + } + + private void createStubsAndComplete(String clusterId, + CompletableFuture<ImmutableMap<ServerName, ClientMetaService.Interface>> future) { + RpcClient c = RpcClientFactory.createClient(conf, clusterId); + ImmutableMap<ServerName, ClientMetaService.Interface> m = createStubs(c, bootstrapNodes); + rpcClient = c; + addr2Stub = m; + future.complete(m); + } + + private void createStubs(List<ServerName> bootstrapServers, int index, + CompletableFuture<ImmutableMap<ServerName, ClientMetaService.Interface>> future) { + // use null cluster id here as we do not know the cluster id yet, we will fetch it through this + // rpc client and use it to create the final rpc client + RpcClient getConnectionRegistryRpcClient = RpcClientFactory.createClient(noAuthConf, null); + // user and rpcTimeout are both not important here, as we will not actually send any rpc calls + // out, only a preamble connection header, but if we pass null as user, there will be NPE in + // some code paths... + RpcChannel channel = + getConnectionRegistryRpcClient.createRpcChannel(bootstrapServers.get(index), user, 0); Review Comment: This is intentional, I do not want to let developers think the timeout will take effect, as not everyone will look at the comment unless there is something unusual... -- This is an automated message from the Apache Git Service. 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