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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.tool;<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.util.Optional;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.HConstants;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.client.Mutation;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.coprocessor.ObserverContext;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.coprocessor.RegionObserver;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.regionserver.MiniBatchOperationInProgress;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.regionserver.OperationStatus;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.slf4j.Logger;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.slf4j.LoggerFactory;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span><a name="line.34"></a> |
| <span class="sourceLineNo">035</span>/**<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> * <p><a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * This coprocessor 'shallows' all the writes. It allows to test a pure write workload, going<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * through all the communication layers. The reads will work as well, but they as we never write,<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * they will always always return an empty structure. The WAL is also skipped. Obviously, the region<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * will never be split automatically. It's up to the user to split and move it.<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * </p><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * <p><a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * For a table created like this: create 'usertable', {NAME =&gt; 'f1', VERSIONS =&gt; 1}<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * </p><a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * <p><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * You can then add the coprocessor with this command: alter 'usertable', 'coprocessor' =&gt;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * '|org.apache.hadoop.hbase.tool.WriteSinkCoprocessor|'<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * </p><a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * <p><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * And then put 'usertable', 'f1', 'f1', 'f1'<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * </p><a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * <p><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * scan 'usertable' Will return: 0 row(s) in 0.0050 seconds<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * </p><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * TODO: It needs tests<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> */<a name="line.56"></a> |
| <span class="sourceLineNo">057</span>@InterfaceAudience.Private<a name="line.57"></a> |
| <span class="sourceLineNo">058</span>public class WriteSinkCoprocessor implements RegionCoprocessor, RegionObserver {<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> private static final Logger LOG = LoggerFactory.getLogger(WriteSinkCoprocessor.class);<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> private final AtomicLong ops = new AtomicLong();<a name="line.60"></a> |
| <span class="sourceLineNo">061</span><a name="line.61"></a> |
| <span class="sourceLineNo">062</span> @Override<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> public Optional<RegionObserver> getRegionObserver() {<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> return Optional.of(this);<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> private String regionName;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span><a name="line.68"></a> |
| <span class="sourceLineNo">069</span> @Override<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> public void preOpen(ObserverContext<RegionCoprocessorEnvironment> e) throws IOException {<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> regionName = e.getEnvironment().getRegion().getRegionInfo().getRegionNameAsString();<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> }<a name="line.72"></a> |
| <span class="sourceLineNo">073</span><a name="line.73"></a> |
| <span class="sourceLineNo">074</span> @Override<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> public void preBatchMutate(final ObserverContext<RegionCoprocessorEnvironment> c,<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> final MiniBatchOperationInProgress<Mutation> miniBatchOp) throws IOException {<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> if (ops.incrementAndGet() % 20000 == 0) {<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> LOG.info("Wrote " + ops.get() + " times in region " + regionName);<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> }<a name="line.79"></a> |
| <span class="sourceLineNo">080</span><a name="line.80"></a> |
| <span class="sourceLineNo">081</span> for (int i = 0; i < miniBatchOp.size(); i++) {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> miniBatchOp.setOperationStatus(i,<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> new OperationStatus(HConstants.OperationStatusCode.SUCCESS));<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> }<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> c.bypass();<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> }<a name="line.86"></a> |
| <span class="sourceLineNo">087</span>}<a name="line.87"></a> |
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