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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 java.io.IOException;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.InterruptedIOException;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span><a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hbase.thirdparty.com.google.protobuf.RpcCallback;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span><a name="line.25"></a> |
| <span class="sourceLineNo">026</span>/**<a name="line.26"></a> |
| <span class="sourceLineNo">027</span> * Simple {@link RpcCallback} implementation providing a {@link java.util.concurrent.Future}-like<a name="line.27"></a> |
| <span class="sourceLineNo">028</span> * {@link BlockingRpcCallback#get()} method, which will block util the instance's<a name="line.28"></a> |
| <span class="sourceLineNo">029</span> * {@link BlockingRpcCallback#run(Object)} method has been called. {@code R} is the RPC response<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> * type that will be passed to the {@link #run(Object)} method.<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> */<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>@InterfaceAudience.Private<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>public class BlockingRpcCallback<R> implements RpcCallback<R> {<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> private R result;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> private boolean resultSet = false;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span><a name="line.36"></a> |
| <span class="sourceLineNo">037</span> /**<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * Called on completion of the RPC call with the response object, or {@code null} in the case of<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * an error.<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * @param parameter the response object or {@code null} if an error occurred<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> */<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> @Override<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> public void run(R parameter) {<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> synchronized (this) {<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> result = parameter;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> resultSet = true;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> this.notifyAll();<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><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> /**<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * Returns the parameter passed to {@link #run(Object)} or {@code null} if a null value was<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * passed. When used asynchronously, this method will block until the {@link #run(Object)} method<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * has been called.<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * @return the response object or {@code null} if no response was passed<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> */<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> public synchronized R get() throws IOException {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> while (!resultSet) {<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> try {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> this.wait();<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> } catch (InterruptedException ie) {<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> InterruptedIOException exception = new InterruptedIOException(ie.getMessage());<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> exception.initCause(ie);<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> throw exception;<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> }<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> }<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> return result;<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> |
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