| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <html lang="en"> |
| <head> |
| <title>Source code</title> |
| <link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style"> |
| </head> |
| <body> |
| <div class="sourceContainer"> |
| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.client;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import static org.apache.hadoop.hbase.HConstants.MASTER_ADDRS_KEY;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import static org.apache.hadoop.hbase.util.DNS.getHostname;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import static org.apache.hadoop.hbase.util.FutureUtils.addListener;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span><a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.io.IOException;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.net.UnknownHostException;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.ArrayList;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.Collections;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.HashSet;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import java.util.List;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import java.util.Set;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import java.util.concurrent.CompletableFuture;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import java.util.concurrent.ConcurrentLinkedQueue;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import java.util.concurrent.ThreadLocalRandom;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import java.util.concurrent.atomic.AtomicInteger;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import java.util.function.Predicate;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import java.util.stream.Collectors;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.conf.Configuration;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.HConstants;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.HRegionLocation;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.RegionLocations;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.ServerName;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.exceptions.ClientExceptionsUtil;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.exceptions.MasterRegistryFetchException;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.ipc.HBaseRpcController;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.ipc.RpcClient;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.ipc.RpcClientFactory;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.ipc.RpcControllerFactory;<a name="line.47"></a> |
| <span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.security.User;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.util.DNS.ServerType;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span><a name="line.51"></a> |
| <span class="sourceLineNo">052</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span>import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;<a name="line.53"></a> |
| <span class="sourceLineNo">054</span>import org.apache.hbase.thirdparty.com.google.common.base.Strings;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span>import org.apache.hbase.thirdparty.com.google.common.collect.ImmutableMap;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span>import org.apache.hbase.thirdparty.com.google.common.net.HostAndPort;<a name="line.56"></a> |
| <span class="sourceLineNo">057</span>import org.apache.hbase.thirdparty.com.google.protobuf.Message;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span>import org.apache.hbase.thirdparty.com.google.protobuf.RpcCallback;<a name="line.58"></a> |
| <span class="sourceLineNo">059</span><a name="line.59"></a> |
| <span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.ClientMetaService;<a name="line.61"></a> |
| <span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.GetClusterIdRequest;<a name="line.62"></a> |
| <span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.GetClusterIdResponse;<a name="line.63"></a> |
| <span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.GetMastersRequest;<a name="line.64"></a> |
| <span class="sourceLineNo">065</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.GetMastersResponse;<a name="line.65"></a> |
| <span class="sourceLineNo">066</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.GetMastersResponseEntry;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.GetMetaRegionLocationsRequest;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.GetMetaRegionLocationsResponse;<a name="line.68"></a> |
| <span class="sourceLineNo">069</span><a name="line.69"></a> |
| <span class="sourceLineNo">070</span>/**<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * Master based registry implementation. Makes RPCs to the configured master addresses from config<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * {@value org.apache.hadoop.hbase.HConstants#MASTER_ADDRS_KEY}.<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * <p/><a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * It supports hedged reads, set the fan out of the requests batch by<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * {@link #MASTER_REGISTRY_HEDGED_REQS_FANOUT_KEY} to a value greater than {@code 1} will enable<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * it(the default value is {@link #MASTER_REGISTRY_HEDGED_REQS_FANOUT_DEFAULT}).<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * <p/><a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * TODO: Handle changes to the configuration dynamically without having to restart the client.<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> */<a name="line.79"></a> |
| <span class="sourceLineNo">080</span>@InterfaceAudience.Private<a name="line.80"></a> |
| <span class="sourceLineNo">081</span>public class MasterRegistry implements ConnectionRegistry {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span><a name="line.82"></a> |
| <span class="sourceLineNo">083</span> /** Configuration key that controls the fan out of requests **/<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> public static final String MASTER_REGISTRY_HEDGED_REQS_FANOUT_KEY =<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> "hbase.client.master_registry.hedged.fanout";<a name="line.85"></a> |
| <span class="sourceLineNo">086</span><a name="line.86"></a> |
| <span class="sourceLineNo">087</span> /** Default value for the fan out of hedged requests. **/<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> public static final int MASTER_REGISTRY_HEDGED_REQS_FANOUT_DEFAULT = 2;<a name="line.88"></a> |
| <span class="sourceLineNo">089</span><a name="line.89"></a> |
| <span class="sourceLineNo">090</span> private static final String MASTER_ADDRS_CONF_SEPARATOR = ",";<a name="line.90"></a> |
| <span class="sourceLineNo">091</span><a name="line.91"></a> |
| <span class="sourceLineNo">092</span> private final int hedgedReadFanOut;<a name="line.92"></a> |
| <span class="sourceLineNo">093</span><a name="line.93"></a> |
| <span class="sourceLineNo">094</span> // Configured list of masters to probe the meta information from.<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> private volatile ImmutableMap<ServerName, ClientMetaService.Interface> masterAddr2Stub;<a name="line.95"></a> |
| <span class="sourceLineNo">096</span><a name="line.96"></a> |
| <span class="sourceLineNo">097</span> // RPC client used to talk to the masters.<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> private final RpcClient rpcClient;<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> private final RpcControllerFactory rpcControllerFactory;<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> private final int rpcTimeoutMs;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span><a name="line.101"></a> |
| <span class="sourceLineNo">102</span> protected final MasterAddressRefresher masterAddressRefresher;<a name="line.102"></a> |
| <span class="sourceLineNo">103</span><a name="line.103"></a> |
| <span class="sourceLineNo">104</span> /**<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> * Parses the list of master addresses from the provided configuration. Supported format is comma<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> * separated host[:port] values. If no port number if specified, default master port is assumed.<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> * @param conf Configuration to parse from.<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> */<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> private static Set<ServerName> parseMasterAddrs(Configuration conf) throws UnknownHostException {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> Set<ServerName> masterAddrs = new HashSet<>();<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> String configuredMasters = getMasterAddr(conf);<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> for (String masterAddr : configuredMasters.split(MASTER_ADDRS_CONF_SEPARATOR)) {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> HostAndPort masterHostPort =<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> HostAndPort.fromString(masterAddr.trim()).withDefaultPort(HConstants.DEFAULT_MASTER_PORT);<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> masterAddrs.add(ServerName.valueOf(masterHostPort.toString(), ServerName.NON_STARTCODE));<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> }<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> Preconditions.checkArgument(!masterAddrs.isEmpty(), "At least one master address is needed");<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> return masterAddrs;<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> }<a name="line.119"></a> |
| <span class="sourceLineNo">120</span><a name="line.120"></a> |
| <span class="sourceLineNo">121</span> MasterRegistry(Configuration conf) throws IOException {<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> this.hedgedReadFanOut = Math.max(1, conf.getInt(MASTER_REGISTRY_HEDGED_REQS_FANOUT_KEY,<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> MASTER_REGISTRY_HEDGED_REQS_FANOUT_DEFAULT));<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> rpcTimeoutMs = (int) Math.min(Integer.MAX_VALUE,<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> conf.getLong(HConstants.HBASE_RPC_TIMEOUT_KEY, HConstants.DEFAULT_HBASE_RPC_TIMEOUT));<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> // XXX: we pass cluster id as null here since we do not have a cluster id yet, we have to fetch<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> // this through the master registry...<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> // This is a problem as we will use the cluster id to determine the authentication method<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> rpcClient = RpcClientFactory.createClient(conf, null);<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> rpcControllerFactory = RpcControllerFactory.instantiate(conf);<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> // Generate the seed list of master stubs. Subsequent RPCs try to keep a live list of masters<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> // by fetching the end points from this list.<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> populateMasterStubs(parseMasterAddrs(conf));<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> masterAddressRefresher = new MasterAddressRefresher(conf, this);<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> }<a name="line.135"></a> |
| <span class="sourceLineNo">136</span><a name="line.136"></a> |
| <span class="sourceLineNo">137</span> void populateMasterStubs(Set<ServerName> masters) throws IOException {<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> Preconditions.checkNotNull(masters);<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> ImmutableMap.Builder<ServerName, ClientMetaService.Interface> builder =<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> ImmutableMap.builderWithExpectedSize(masters.size());<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> User user = User.getCurrent();<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> for (ServerName masterAddr : masters) {<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> builder.put(masterAddr,<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> ClientMetaService.newStub(rpcClient.createRpcChannel(masterAddr, user, rpcTimeoutMs)));<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> }<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> masterAddr2Stub = builder.build();<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> }<a name="line.147"></a> |
| <span class="sourceLineNo">148</span><a name="line.148"></a> |
| <span class="sourceLineNo">149</span> /**<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> * Builds the default master address end point if it is not specified in the configuration.<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> * <p/><a name="line.151"></a> |
| <span class="sourceLineNo">152</span> * Will be called in {@code HBaseTestingUtility}.<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> */<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> @VisibleForTesting<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> public static String getMasterAddr(Configuration conf) throws UnknownHostException {<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> String masterAddrFromConf = conf.get(MASTER_ADDRS_KEY);<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> if (!Strings.isNullOrEmpty(masterAddrFromConf)) {<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> return masterAddrFromConf;<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> }<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> String hostname = getHostname(conf, ServerType.MASTER);<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> int port = conf.getInt(HConstants.MASTER_PORT, HConstants.DEFAULT_MASTER_PORT);<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> return String.format("%s:%d", hostname, port);<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> }<a name="line.163"></a> |
| <span class="sourceLineNo">164</span><a name="line.164"></a> |
| <span class="sourceLineNo">165</span> /**<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> * For describing the actual asynchronous rpc call.<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> * <p/><a name="line.167"></a> |
| <span class="sourceLineNo">168</span> * Typically, you can use lambda expression to implement this interface as<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> *<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> * <pre><a name="line.170"></a> |
| <span class="sourceLineNo">171</span> * (c, s, d) -> s.xxx(c, your request here, d)<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> * </pre><a name="line.172"></a> |
| <span class="sourceLineNo">173</span> */<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> @FunctionalInterface<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> private interface Callable<T> {<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> void call(HBaseRpcController controller, ClientMetaService.Interface stub, RpcCallback<T> done);<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> }<a name="line.177"></a> |
| <span class="sourceLineNo">178</span><a name="line.178"></a> |
| <span class="sourceLineNo">179</span> private <T extends Message> CompletableFuture<T> call(ClientMetaService.Interface stub,<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> Callable<T> callable) {<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> HBaseRpcController controller = rpcControllerFactory.newController();<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> CompletableFuture<T> future = new CompletableFuture<>();<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> callable.call(controller, stub, resp -> {<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> if (controller.failed()) {<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> IOException failureReason = controller.getFailed();<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> future.completeExceptionally(failureReason);<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> if (ClientExceptionsUtil.isConnectionException(failureReason)) {<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> // RPC has failed, trigger a refresh of master end points. We can have some spurious<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> // refreshes, but that is okay since the RPC is not expensive and not in a hot path.<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> masterAddressRefresher.refreshNow();<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> }<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> } else {<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> future.complete(resp);<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> }<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> });<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> return future;<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> }<a name="line.197"></a> |
| <span class="sourceLineNo">198</span><a name="line.198"></a> |
| <span class="sourceLineNo">199</span> private IOException badResponse(String debug) {<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> return new IOException(String.format("Invalid result for request %s. Will be retried", debug));<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> }<a name="line.201"></a> |
| <span class="sourceLineNo">202</span><a name="line.202"></a> |
| <span class="sourceLineNo">203</span> /**<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> * send requests concurrently to hedgedReadsFanout masters. If any of the request is succeeded, we<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> * will complete the future and quit. If all the requests in one round are failed, we will start<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> * another round to send requests concurrently tohedgedReadsFanout masters. If all masters have<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> * been tried and all of them are failed, we will fail the future.<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> */<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> private <T extends Message> void groupCall(CompletableFuture<T> future,<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> Set<ServerName> masterServers, List<ClientMetaService.Interface> masterStubs,<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> int startIndexInclusive, Callable<T> callable, Predicate<T> isValidResp, String debug,<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> ConcurrentLinkedQueue<Throwable> errors) {<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> int endIndexExclusive = Math.min(startIndexInclusive + hedgedReadFanOut, masterStubs.size());<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> AtomicInteger remaining = new AtomicInteger(endIndexExclusive - startIndexInclusive);<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> for (int i = startIndexInclusive; i < endIndexExclusive; i++) {<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> addListener(call(masterStubs.get(i), callable), (r, e) -> {<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> // a simple check to skip all the later operations earlier<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> if (future.isDone()) {<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> return;<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> }<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> if (e == null && !isValidResp.test(r)) {<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> e = badResponse(debug);<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> }<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> if (e != null) {<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> // make sure when remaining reaches 0 we have all exceptions in the errors queue<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> errors.add(e);<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> if (remaining.decrementAndGet() == 0) {<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> if (endIndexExclusive == masterStubs.size()) {<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> // we are done, complete the future with exception<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> RetriesExhaustedException ex = new RetriesExhaustedException("masters",<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> masterStubs.size(), new ArrayList<>(errors));<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> future.completeExceptionally(<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> new MasterRegistryFetchException(masterServers, ex));<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> } else {<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> groupCall(future, masterServers, masterStubs, endIndexExclusive, callable,<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> isValidResp, debug, errors);<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> }<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> }<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> } else {<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> // do not need to decrement the counter any more as we have already finished the future.<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> future.complete(r);<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> }<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> });<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> }<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> }<a name="line.245"></a> |
| <span class="sourceLineNo">246</span><a name="line.246"></a> |
| <span class="sourceLineNo">247</span> private <T extends Message> CompletableFuture<T> call(Callable<T> callable,<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> Predicate<T> isValidResp, String debug) {<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> ImmutableMap<ServerName, ClientMetaService.Interface> masterAddr2StubRef = masterAddr2Stub;<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> Set<ServerName> masterServers = masterAddr2StubRef.keySet();<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> List<ClientMetaService.Interface> masterStubs = new ArrayList<>(masterAddr2StubRef.values());<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> Collections.shuffle(masterStubs, ThreadLocalRandom.current());<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> CompletableFuture<T> future = new CompletableFuture<>();<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> groupCall(future, masterServers, masterStubs, 0, callable, isValidResp, debug,<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> new ConcurrentLinkedQueue<>());<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> return future;<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> }<a name="line.257"></a> |
| <span class="sourceLineNo">258</span><a name="line.258"></a> |
| <span class="sourceLineNo">259</span> /**<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> * Simple helper to transform the result of getMetaRegionLocations() rpc.<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> */<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> private static RegionLocations transformMetaRegionLocations(GetMetaRegionLocationsResponse resp) {<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> List<HRegionLocation> regionLocations = new ArrayList<>();<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> resp.getMetaLocationsList()<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> .forEach(location -> regionLocations.add(ProtobufUtil.toRegionLocation(location)));<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> return new RegionLocations(regionLocations);<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> }<a name="line.267"></a> |
| <span class="sourceLineNo">268</span><a name="line.268"></a> |
| <span class="sourceLineNo">269</span> @Override<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> public CompletableFuture<RegionLocations> getMetaRegionLocations() {<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> return this.<GetMetaRegionLocationsResponse> call((c, s, d) -> s.getMetaRegionLocations(c,<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> GetMetaRegionLocationsRequest.getDefaultInstance(), d), r -> r.getMetaLocationsCount() != 0,<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> "getMetaLocationsCount").thenApply(MasterRegistry::transformMetaRegionLocations);<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> }<a name="line.274"></a> |
| <span class="sourceLineNo">275</span><a name="line.275"></a> |
| <span class="sourceLineNo">276</span> @Override<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> public CompletableFuture<String> getClusterId() {<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> return this<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> .<GetClusterIdResponse> call(<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> (c, s, d) -> s.getClusterId(c, GetClusterIdRequest.getDefaultInstance(), d),<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> GetClusterIdResponse::hasClusterId, "getClusterId()")<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> .thenApply(GetClusterIdResponse::getClusterId);<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> }<a name="line.283"></a> |
| <span class="sourceLineNo">284</span><a name="line.284"></a> |
| <span class="sourceLineNo">285</span> private static boolean hasActiveMaster(GetMastersResponse resp) {<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> List<GetMastersResponseEntry> activeMasters =<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> resp.getMasterServersList().stream().filter(GetMastersResponseEntry::getIsActive).collect(<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> Collectors.toList());<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> return activeMasters.size() == 1;<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> }<a name="line.290"></a> |
| <span class="sourceLineNo">291</span><a name="line.291"></a> |
| <span class="sourceLineNo">292</span> private static ServerName filterActiveMaster(GetMastersResponse resp) throws IOException {<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> List<GetMastersResponseEntry> activeMasters =<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> resp.getMasterServersList().stream().filter(GetMastersResponseEntry::getIsActive).collect(<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> Collectors.toList());<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> if (activeMasters.size() != 1) {<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> throw new IOException(String.format("Incorrect number of active masters encountered." +<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> " Expected: 1 found: %d. Content: %s", activeMasters.size(), activeMasters));<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> }<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> return ProtobufUtil.toServerName(activeMasters.get(0).getServerName());<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> }<a name="line.301"></a> |
| <span class="sourceLineNo">302</span><a name="line.302"></a> |
| <span class="sourceLineNo">303</span> @Override<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> public CompletableFuture<ServerName> getActiveMaster() {<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> CompletableFuture<ServerName> future = new CompletableFuture<>();<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> addListener(call((c, s, d) -> s.getMasters(c, GetMastersRequest.getDefaultInstance(), d),<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> MasterRegistry::hasActiveMaster, "getMasters()"), (resp, ex) -> {<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> if (ex != null) {<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> future.completeExceptionally(ex);<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> }<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> ServerName result = null;<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> try {<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> result = filterActiveMaster((GetMastersResponse)resp);<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> } catch (IOException e) {<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> future.completeExceptionally(e);<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> }<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> future.complete(result);<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> });<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> return future;<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> }<a name="line.320"></a> |
| <span class="sourceLineNo">321</span><a name="line.321"></a> |
| <span class="sourceLineNo">322</span> private static List<ServerName> transformServerNames(GetMastersResponse resp) {<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> return resp.getMasterServersList().stream().map(s -> ProtobufUtil.toServerName(<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> s.getServerName())).collect(Collectors.toList());<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> }<a name="line.325"></a> |
| <span class="sourceLineNo">326</span><a name="line.326"></a> |
| <span class="sourceLineNo">327</span> CompletableFuture<List<ServerName>> getMasters() {<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> return this<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> .<GetMastersResponse> call((c, s, d) -> s.getMasters(<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> c, GetMastersRequest.getDefaultInstance(), d), r -> r.getMasterServersCount() != 0,<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> "getMasters()").thenApply(MasterRegistry::transformServerNames);<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> }<a name="line.332"></a> |
| <span class="sourceLineNo">333</span><a name="line.333"></a> |
| <span class="sourceLineNo">334</span> @VisibleForTesting<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> Set<ServerName> getParsedMasterServers() {<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> return masterAddr2Stub.keySet();<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> }<a name="line.337"></a> |
| <span class="sourceLineNo">338</span><a name="line.338"></a> |
| <span class="sourceLineNo">339</span> @Override<a name="line.339"></a> |
| <span class="sourceLineNo">340</span> public void close() {<a name="line.340"></a> |
| <span class="sourceLineNo">341</span> if (masterAddressRefresher != null) {<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> masterAddressRefresher.close();<a name="line.342"></a> |
| <span class="sourceLineNo">343</span> }<a name="line.343"></a> |
| <span class="sourceLineNo">344</span> if (rpcClient != null) {<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> rpcClient.close();<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> }<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> }<a name="line.347"></a> |
| <span class="sourceLineNo">348</span>}<a name="line.348"></a> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </body> |
| </html> |
