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<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.ipc;<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.shaded.protobuf.generated.HBaseProtos.RegionSpecifier.RegionSpecifierType.REGION_NAME;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import edu.umd.cs.findbugs.annotations.Nullable;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.io.IOException;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.io.InterruptedIOException;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.DoNotRetryIOException;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HConstants;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.exceptions.UnknownProtocolException;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.hadoop.util.StringUtils;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.slf4j.Logger;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.slf4j.LoggerFactory;<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hbase.thirdparty.com.google.protobuf.ByteString;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hbase.thirdparty.com.google.protobuf.Descriptors;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hbase.thirdparty.com.google.protobuf.Descriptors.MethodDescriptor;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hbase.thirdparty.com.google.protobuf.Descriptors.ServiceDescriptor;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hbase.thirdparty.com.google.protobuf.Message;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.hbase.thirdparty.com.google.protobuf.RpcCallback;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.hbase.thirdparty.com.google.protobuf.RpcController;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.apache.hbase.thirdparty.com.google.protobuf.Service;<a name="line.40"></a>
<span class="sourceLineNo">041</span><a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos;<a name="line.44"></a>
<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.CoprocessorServiceCall;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.CoprocessorServiceRequest;<a name="line.46"></a>
<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.RegionSpecifier.RegionSpecifierType;<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span>/**<a name="line.49"></a>
<span class="sourceLineNo">050</span> * Utilities for handling coprocessor rpc service calls.<a name="line.50"></a>
<span class="sourceLineNo">051</span> */<a name="line.51"></a>
<span class="sourceLineNo">052</span>@InterfaceAudience.Private<a name="line.52"></a>
<span class="sourceLineNo">053</span>public final class CoprocessorRpcUtils {<a name="line.53"></a>
<span class="sourceLineNo">054</span> private static final Logger LOG = LoggerFactory.getLogger(CoprocessorRpcUtils.class);<a name="line.54"></a>
<span class="sourceLineNo">055</span> /**<a name="line.55"></a>
<span class="sourceLineNo">056</span> * We assume that all HBase protobuf services share a common package name (defined in the .proto<a name="line.56"></a>
<span class="sourceLineNo">057</span> * files).<a name="line.57"></a>
<span class="sourceLineNo">058</span> */<a name="line.58"></a>
<span class="sourceLineNo">059</span> private static final String hbaseServicePackage;<a name="line.59"></a>
<span class="sourceLineNo">060</span> static {<a name="line.60"></a>
<span class="sourceLineNo">061</span> Descriptors.ServiceDescriptor clientService = ClientProtos.ClientService.getDescriptor();<a name="line.61"></a>
<span class="sourceLineNo">062</span> hbaseServicePackage = clientService.getFullName().substring(0,<a name="line.62"></a>
<span class="sourceLineNo">063</span> clientService.getFullName().lastIndexOf(clientService.getName()));<a name="line.63"></a>
<span class="sourceLineNo">064</span> }<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span> private CoprocessorRpcUtils() {<a name="line.66"></a>
<span class="sourceLineNo">067</span> // private for utility class<a name="line.67"></a>
<span class="sourceLineNo">068</span> }<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> * Returns the name to use for coprocessor service calls. For core HBase services (in the hbase.pb<a name="line.71"></a>
<span class="sourceLineNo">072</span> * protobuf package), this returns the unqualified name in order to provide backward compatibility<a name="line.72"></a>
<span class="sourceLineNo">073</span> * across the package name change. For all other services, the fully-qualified service name is<a name="line.73"></a>
<span class="sourceLineNo">074</span> * used.<a name="line.74"></a>
<span class="sourceLineNo">075</span> */<a name="line.75"></a>
<span class="sourceLineNo">076</span> public static String getServiceName(Descriptors.ServiceDescriptor service) {<a name="line.76"></a>
<span class="sourceLineNo">077</span> if (service.getFullName().startsWith(hbaseServicePackage)) {<a name="line.77"></a>
<span class="sourceLineNo">078</span> return service.getName();<a name="line.78"></a>
<span class="sourceLineNo">079</span> }<a name="line.79"></a>
<span class="sourceLineNo">080</span> return service.getFullName();<a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span> public static CoprocessorServiceRequest<a name="line.83"></a>
<span class="sourceLineNo">084</span> getCoprocessorServiceRequest(final Descriptors.MethodDescriptor method, final Message request) {<a name="line.84"></a>
<span class="sourceLineNo">085</span> return getCoprocessorServiceRequest(method, request, HConstants.EMPTY_BYTE_ARRAY,<a name="line.85"></a>
<span class="sourceLineNo">086</span> HConstants.EMPTY_BYTE_ARRAY);<a name="line.86"></a>
<span class="sourceLineNo">087</span> }<a name="line.87"></a>
<span class="sourceLineNo">088</span><a name="line.88"></a>
<span class="sourceLineNo">089</span> public static CoprocessorServiceRequest getCoprocessorServiceRequest(<a name="line.89"></a>
<span class="sourceLineNo">090</span> final Descriptors.MethodDescriptor method, final Message request, final byte[] row,<a name="line.90"></a>
<span class="sourceLineNo">091</span> final byte[] regionName) {<a name="line.91"></a>
<span class="sourceLineNo">092</span> return CoprocessorServiceRequest.newBuilder()<a name="line.92"></a>
<span class="sourceLineNo">093</span> .setCall(getCoprocessorServiceCall(method, request, row))<a name="line.93"></a>
<span class="sourceLineNo">094</span> .setRegion(RequestConverter.buildRegionSpecifier(REGION_NAME, regionName)).build();<a name="line.94"></a>
<span class="sourceLineNo">095</span> }<a name="line.95"></a>
<span class="sourceLineNo">096</span><a name="line.96"></a>
<span class="sourceLineNo">097</span> private static CoprocessorServiceCall getCoprocessorServiceCall(final MethodDescriptor method,<a name="line.97"></a>
<span class="sourceLineNo">098</span> final Message request, final byte[] row) {<a name="line.98"></a>
<span class="sourceLineNo">099</span> return CoprocessorServiceCall.newBuilder()<a name="line.99"></a>
<span class="sourceLineNo">100</span> .setRow(org.apache.hbase.thirdparty.com.google.protobuf.UnsafeByteOperations.unsafeWrap(row))<a name="line.100"></a>
<span class="sourceLineNo">101</span> .setServiceName(CoprocessorRpcUtils.getServiceName(method.getService()))<a name="line.101"></a>
<span class="sourceLineNo">102</span> .setMethodName(method.getName())<a name="line.102"></a>
<span class="sourceLineNo">103</span> // TODO!!!!! Come back here after!!!!! This is a double copy of the request if I read<a name="line.103"></a>
<span class="sourceLineNo">104</span> // it right copying from non-shaded to shaded version!!!!!! FIXXXXX!!!!!<a name="line.104"></a>
<span class="sourceLineNo">105</span> .setRequest(org.apache.hbase.thirdparty.com.google.protobuf.UnsafeByteOperations<a name="line.105"></a>
<span class="sourceLineNo">106</span> .unsafeWrap(request.toByteArray()))<a name="line.106"></a>
<span class="sourceLineNo">107</span> .build();<a name="line.107"></a>
<span class="sourceLineNo">108</span> }<a name="line.108"></a>
<span class="sourceLineNo">109</span><a name="line.109"></a>
<span class="sourceLineNo">110</span> public static MethodDescriptor getMethodDescriptor(final String methodName,<a name="line.110"></a>
<span class="sourceLineNo">111</span> final ServiceDescriptor serviceDesc) throws UnknownProtocolException {<a name="line.111"></a>
<span class="sourceLineNo">112</span> MethodDescriptor methodDesc = serviceDesc.findMethodByName(methodName);<a name="line.112"></a>
<span class="sourceLineNo">113</span> if (methodDesc == null) {<a name="line.113"></a>
<span class="sourceLineNo">114</span> throw new UnknownProtocolException(<a name="line.114"></a>
<span class="sourceLineNo">115</span> "Unknown method " + methodName + " called on service " + serviceDesc.getFullName());<a name="line.115"></a>
<span class="sourceLineNo">116</span> }<a name="line.116"></a>
<span class="sourceLineNo">117</span> return methodDesc;<a name="line.117"></a>
<span class="sourceLineNo">118</span> }<a name="line.118"></a>
<span class="sourceLineNo">119</span><a name="line.119"></a>
<span class="sourceLineNo">120</span> public static Message getRequest(Service service, MethodDescriptor methodDesc,<a name="line.120"></a>
<span class="sourceLineNo">121</span> ByteString shadedRequest) throws IOException {<a name="line.121"></a>
<span class="sourceLineNo">122</span> Message.Builder builderForType = service.getRequestPrototype(methodDesc).newBuilderForType();<a name="line.122"></a>
<span class="sourceLineNo">123</span> ProtobufUtil.mergeFrom(builderForType,<a name="line.123"></a>
<span class="sourceLineNo">124</span> // TODO: COPY FROM SHADED TO NON_SHADED. DO I HAVE TOO?<a name="line.124"></a>
<span class="sourceLineNo">125</span> shadedRequest.toByteArray());<a name="line.125"></a>
<span class="sourceLineNo">126</span> return builderForType.build();<a name="line.126"></a>
<span class="sourceLineNo">127</span> }<a name="line.127"></a>
<span class="sourceLineNo">128</span><a name="line.128"></a>
<span class="sourceLineNo">129</span> public static Message getResponse(ClientProtos.CoprocessorServiceResponse result,<a name="line.129"></a>
<span class="sourceLineNo">130</span> Message responsePrototype) throws IOException {<a name="line.130"></a>
<span class="sourceLineNo">131</span> Message response;<a name="line.131"></a>
<span class="sourceLineNo">132</span> if (result.getValue().hasValue()) {<a name="line.132"></a>
<span class="sourceLineNo">133</span> Message.Builder builder = responsePrototype.newBuilderForType();<a name="line.133"></a>
<span class="sourceLineNo">134</span> builder.mergeFrom(result.getValue().getValue().newInput());<a name="line.134"></a>
<span class="sourceLineNo">135</span> response = builder.build();<a name="line.135"></a>
<span class="sourceLineNo">136</span> } else {<a name="line.136"></a>
<span class="sourceLineNo">137</span> response = responsePrototype.getDefaultInstanceForType();<a name="line.137"></a>
<span class="sourceLineNo">138</span> }<a name="line.138"></a>
<span class="sourceLineNo">139</span> if (LOG.isTraceEnabled()) {<a name="line.139"></a>
<span class="sourceLineNo">140</span> LOG.trace("Master Result is value=" + response);<a name="line.140"></a>
<span class="sourceLineNo">141</span> }<a name="line.141"></a>
<span class="sourceLineNo">142</span> return response;<a name="line.142"></a>
<span class="sourceLineNo">143</span> }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span> public static ClientProtos.CoprocessorServiceResponse getResponse(final Message result,<a name="line.145"></a>
<span class="sourceLineNo">146</span> final byte[] regionName) {<a name="line.146"></a>
<span class="sourceLineNo">147</span> ClientProtos.CoprocessorServiceResponse.Builder builder =<a name="line.147"></a>
<span class="sourceLineNo">148</span> ClientProtos.CoprocessorServiceResponse.newBuilder();<a name="line.148"></a>
<span class="sourceLineNo">149</span> builder.setRegion(<a name="line.149"></a>
<span class="sourceLineNo">150</span> RequestConverter.buildRegionSpecifier(RegionSpecifierType.REGION_NAME, regionName));<a name="line.150"></a>
<span class="sourceLineNo">151</span> // TODO: UGLY COPY IN HERE!!!!<a name="line.151"></a>
<span class="sourceLineNo">152</span> builder.setValue(builder.getValueBuilder().setName(result.getClass().getName()).setValue(<a name="line.152"></a>
<span class="sourceLineNo">153</span> org.apache.hbase.thirdparty.com.google.protobuf.ByteString.copyFrom(result.toByteArray())));<a name="line.153"></a>
<span class="sourceLineNo">154</span> return builder.build();<a name="line.154"></a>
<span class="sourceLineNo">155</span> }<a name="line.155"></a>
<span class="sourceLineNo">156</span><a name="line.156"></a>
<span class="sourceLineNo">157</span> /**<a name="line.157"></a>
<span class="sourceLineNo">158</span> * Simple {@link RpcCallback} implementation providing a {@link java.util.concurrent.Future}-like<a name="line.158"></a>
<span class="sourceLineNo">159</span> * {@link BlockingRpcCallback#get()} method, which will block util the instance's<a name="line.159"></a>
<span class="sourceLineNo">160</span> * {@link BlockingRpcCallback#run(Object)} method has been called. {@code R} is the RPC response<a name="line.160"></a>
<span class="sourceLineNo">161</span> * type that will be passed to the {@link #run(Object)} method.<a name="line.161"></a>
<span class="sourceLineNo">162</span> */<a name="line.162"></a>
<span class="sourceLineNo">163</span> @InterfaceAudience.Private<a name="line.163"></a>
<span class="sourceLineNo">164</span> // Copy of BlockingRpcCallback but deriving from RpcCallback non-shaded.<a name="line.164"></a>
<span class="sourceLineNo">165</span> public static class BlockingRpcCallback&lt;R&gt; implements RpcCallback&lt;R&gt; {<a name="line.165"></a>
<span class="sourceLineNo">166</span> private R result;<a name="line.166"></a>
<span class="sourceLineNo">167</span> private boolean resultSet = false;<a name="line.167"></a>
<span class="sourceLineNo">168</span><a name="line.168"></a>
<span class="sourceLineNo">169</span> /**<a name="line.169"></a>
<span class="sourceLineNo">170</span> * Called on completion of the RPC call with the response object, or {@code null} in the case of<a name="line.170"></a>
<span class="sourceLineNo">171</span> * an error.<a name="line.171"></a>
<span class="sourceLineNo">172</span> * @param parameter the response object or {@code null} if an error occurred<a name="line.172"></a>
<span class="sourceLineNo">173</span> */<a name="line.173"></a>
<span class="sourceLineNo">174</span> @Override<a name="line.174"></a>
<span class="sourceLineNo">175</span> public void run(R parameter) {<a name="line.175"></a>
<span class="sourceLineNo">176</span> synchronized (this) {<a name="line.176"></a>
<span class="sourceLineNo">177</span> result = parameter;<a name="line.177"></a>
<span class="sourceLineNo">178</span> resultSet = true;<a name="line.178"></a>
<span class="sourceLineNo">179</span> this.notifyAll();<a name="line.179"></a>
<span class="sourceLineNo">180</span> }<a name="line.180"></a>
<span class="sourceLineNo">181</span> }<a name="line.181"></a>
<span class="sourceLineNo">182</span><a name="line.182"></a>
<span class="sourceLineNo">183</span> /**<a name="line.183"></a>
<span class="sourceLineNo">184</span> * Returns the parameter passed to {@link #run(Object)} or {@code null} if a null value was<a name="line.184"></a>
<span class="sourceLineNo">185</span> * passed. When used asynchronously, this method will block until the {@link #run(Object)}<a name="line.185"></a>
<span class="sourceLineNo">186</span> * method has been called.<a name="line.186"></a>
<span class="sourceLineNo">187</span> * @return the response object or {@code null} if no response was passed<a name="line.187"></a>
<span class="sourceLineNo">188</span> */<a name="line.188"></a>
<span class="sourceLineNo">189</span> public synchronized R get() throws IOException {<a name="line.189"></a>
<span class="sourceLineNo">190</span> while (!resultSet) {<a name="line.190"></a>
<span class="sourceLineNo">191</span> try {<a name="line.191"></a>
<span class="sourceLineNo">192</span> this.wait();<a name="line.192"></a>
<span class="sourceLineNo">193</span> } catch (InterruptedException ie) {<a name="line.193"></a>
<span class="sourceLineNo">194</span> InterruptedIOException exception = new InterruptedIOException(ie.getMessage());<a name="line.194"></a>
<span class="sourceLineNo">195</span> exception.initCause(ie);<a name="line.195"></a>
<span class="sourceLineNo">196</span> throw exception;<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> return result;<a name="line.199"></a>
<span class="sourceLineNo">200</span> }<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> * Stores an exception encountered during RPC invocation so it can be passed back through to the<a name="line.204"></a>
<span class="sourceLineNo">205</span> * client.<a name="line.205"></a>
<span class="sourceLineNo">206</span> * @param controller the controller instance provided by the client when calling the service<a name="line.206"></a>
<span class="sourceLineNo">207</span> * @param ioe the exception encountered<a name="line.207"></a>
<span class="sourceLineNo">208</span> */<a name="line.208"></a>
<span class="sourceLineNo">209</span> public static void setControllerException(RpcController controller, IOException ioe) {<a name="line.209"></a>
<span class="sourceLineNo">210</span> if (controller == null) {<a name="line.210"></a>
<span class="sourceLineNo">211</span> return;<a name="line.211"></a>
<span class="sourceLineNo">212</span> }<a name="line.212"></a>
<span class="sourceLineNo">213</span> if (controller instanceof org.apache.hadoop.hbase.ipc.ServerRpcController) {<a name="line.213"></a>
<span class="sourceLineNo">214</span> ((ServerRpcController) controller).setFailedOn(ioe);<a name="line.214"></a>
<span class="sourceLineNo">215</span> } else {<a name="line.215"></a>
<span class="sourceLineNo">216</span> controller.setFailed(StringUtils.stringifyException(ioe));<a name="line.216"></a>
<span class="sourceLineNo">217</span> }<a name="line.217"></a>
<span class="sourceLineNo">218</span> }<a name="line.218"></a>
<span class="sourceLineNo">219</span><a name="line.219"></a>
<span class="sourceLineNo">220</span> /**<a name="line.220"></a>
<span class="sourceLineNo">221</span> * Retreivies exception stored during RPC invocation.<a name="line.221"></a>
<span class="sourceLineNo">222</span> * @param controller the controller instance provided by the client when calling the service<a name="line.222"></a>
<span class="sourceLineNo">223</span> * @return exception if any, or null; Will return DoNotRetryIOException for string represented<a name="line.223"></a>
<span class="sourceLineNo">224</span> * failure causes in controller.<a name="line.224"></a>
<span class="sourceLineNo">225</span> */<a name="line.225"></a>
<span class="sourceLineNo">226</span> @Nullable<a name="line.226"></a>
<span class="sourceLineNo">227</span> public static IOException getControllerException(RpcController controller) throws IOException {<a name="line.227"></a>
<span class="sourceLineNo">228</span> if (controller == null || !controller.failed()) {<a name="line.228"></a>
<span class="sourceLineNo">229</span> return null;<a name="line.229"></a>
<span class="sourceLineNo">230</span> }<a name="line.230"></a>
<span class="sourceLineNo">231</span> if (controller instanceof ServerRpcController) {<a name="line.231"></a>
<span class="sourceLineNo">232</span> return ((ServerRpcController) controller).getFailedOn();<a name="line.232"></a>
<span class="sourceLineNo">233</span> }<a name="line.233"></a>
<span class="sourceLineNo">234</span> return new DoNotRetryIOException(controller.errorText());<a name="line.234"></a>
<span class="sourceLineNo">235</span> }<a name="line.235"></a>
<span class="sourceLineNo">236</span>}<a name="line.236"></a>
</pre>
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