You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2018/01/13 15:31:53 UTC
[04/47] hbase-site git commit: Published site at .
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/554d61c6/testdevapidocs/src-html/org/apache/hadoop/hbase/regionserver/TestRegionServerReadRequestMetrics.Metric.html
----------------------------------------------------------------------
diff --git a/testdevapidocs/src-html/org/apache/hadoop/hbase/regionserver/TestRegionServerReadRequestMetrics.Metric.html b/testdevapidocs/src-html/org/apache/hadoop/hbase/regionserver/TestRegionServerReadRequestMetrics.Metric.html
index 24db4ca..bf924bf 100644
--- a/testdevapidocs/src-html/org/apache/hadoop/hbase/regionserver/TestRegionServerReadRequestMetrics.Metric.html
+++ b/testdevapidocs/src-html/org/apache/hadoop/hbase/regionserver/TestRegionServerReadRequestMetrics.Metric.html
@@ -6,7 +6,7 @@
</head>
<body>
<div class="sourceContainer">
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+<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> *<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.3"></a>
<span class="sourceLineNo">004</span> * or more contributor license agreements. See the NOTICE file<a name="line.4"></a>
@@ -71,437 +71,439 @@
<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.63"></a>
<span class="sourceLineNo">064</span>import org.junit.AfterClass;<a name="line.64"></a>
<span class="sourceLineNo">065</span>import org.junit.BeforeClass;<a name="line.65"></a>
-<span class="sourceLineNo">066</span>import org.junit.Test;<a name="line.66"></a>
-<span class="sourceLineNo">067</span>import org.junit.experimental.categories.Category;<a name="line.67"></a>
-<span class="sourceLineNo">068</span>import org.slf4j.Logger;<a name="line.68"></a>
-<span class="sourceLineNo">069</span>import org.slf4j.LoggerFactory;<a name="line.69"></a>
-<span class="sourceLineNo">070</span><a name="line.70"></a>
-<span class="sourceLineNo">071</span>@Category(MediumTests.class)<a name="line.71"></a>
-<span class="sourceLineNo">072</span>public class TestRegionServerReadRequestMetrics {<a name="line.72"></a>
-<span class="sourceLineNo">073</span> private static final Logger LOG =<a name="line.73"></a>
-<span class="sourceLineNo">074</span> LoggerFactory.getLogger(TestRegionServerReadRequestMetrics.class);<a name="line.74"></a>
-<span class="sourceLineNo">075</span> private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();<a name="line.75"></a>
-<span class="sourceLineNo">076</span> private static final TableName TABLE_NAME = TableName.valueOf("test");<a name="line.76"></a>
-<span class="sourceLineNo">077</span> private static final byte[] CF1 = "c1".getBytes();<a name="line.77"></a>
-<span class="sourceLineNo">078</span> private static final byte[] CF2 = "c2".getBytes();<a name="line.78"></a>
-<span class="sourceLineNo">079</span><a name="line.79"></a>
-<span class="sourceLineNo">080</span> private static final byte[] ROW1 = "a".getBytes();<a name="line.80"></a>
-<span class="sourceLineNo">081</span> private static final byte[] ROW2 = "b".getBytes();<a name="line.81"></a>
-<span class="sourceLineNo">082</span> private static final byte[] ROW3 = "c".getBytes();<a name="line.82"></a>
-<span class="sourceLineNo">083</span> private static final byte[] COL1 = "q1".getBytes();<a name="line.83"></a>
-<span class="sourceLineNo">084</span> private static final byte[] COL2 = "q2".getBytes();<a name="line.84"></a>
-<span class="sourceLineNo">085</span> private static final byte[] COL3 = "q3".getBytes();<a name="line.85"></a>
-<span class="sourceLineNo">086</span> private static final byte[] VAL1 = "v1".getBytes();<a name="line.86"></a>
-<span class="sourceLineNo">087</span> private static final byte[] VAL2 = "v2".getBytes();<a name="line.87"></a>
-<span class="sourceLineNo">088</span> private static final byte[] VAL3 = Bytes.toBytes(0L);<a name="line.88"></a>
-<span class="sourceLineNo">089</span><a name="line.89"></a>
-<span class="sourceLineNo">090</span> private static final int MAX_TRY = 20;<a name="line.90"></a>
-<span class="sourceLineNo">091</span> private static final int SLEEP_MS = 100;<a name="line.91"></a>
-<span class="sourceLineNo">092</span> private static final int TTL = 1;<a name="line.92"></a>
-<span class="sourceLineNo">093</span><a name="line.93"></a>
-<span class="sourceLineNo">094</span> private static Admin admin;<a name="line.94"></a>
-<span class="sourceLineNo">095</span> private static Collection<ServerName> serverNames;<a name="line.95"></a>
-<span class="sourceLineNo">096</span> private static Table table;<a name="line.96"></a>
-<span class="sourceLineNo">097</span> private static RegionInfo regionInfo;<a name="line.97"></a>
-<span class="sourceLineNo">098</span><a name="line.98"></a>
-<span class="sourceLineNo">099</span> private static Map<Metric, Long> requestsMap = new HashMap<>();<a name="line.99"></a>
-<span class="sourceLineNo">100</span> private static Map<Metric, Long> requestsMapPrev = new HashMap<>();<a name="line.100"></a>
-<span class="sourceLineNo">101</span><a name="line.101"></a>
-<span class="sourceLineNo">102</span> @BeforeClass<a name="line.102"></a>
-<span class="sourceLineNo">103</span> public static void setUpOnce() throws Exception {<a name="line.103"></a>
-<span class="sourceLineNo">104</span> // Default starts one regionserver only.<a name="line.104"></a>
-<span class="sourceLineNo">105</span> TEST_UTIL.getConfiguration().setBoolean(LoadBalancer.TABLES_ON_MASTER, true);<a name="line.105"></a>
-<span class="sourceLineNo">106</span> TEST_UTIL.getConfiguration().setBoolean(LoadBalancer.SYSTEM_TABLES_ON_MASTER, true);<a name="line.106"></a>
-<span class="sourceLineNo">107</span> TEST_UTIL.startMiniCluster();<a name="line.107"></a>
-<span class="sourceLineNo">108</span> admin = TEST_UTIL.getAdmin();<a name="line.108"></a>
-<span class="sourceLineNo">109</span> serverNames = admin.getClusterMetrics(EnumSet.of(Option.LIVE_SERVERS))<a name="line.109"></a>
-<span class="sourceLineNo">110</span> .getLiveServerMetrics().keySet();<a name="line.110"></a>
-<span class="sourceLineNo">111</span> table = createTable();<a name="line.111"></a>
-<span class="sourceLineNo">112</span> putData();<a name="line.112"></a>
-<span class="sourceLineNo">113</span> List<RegionInfo> regions = admin.getRegions(TABLE_NAME);<a name="line.113"></a>
-<span class="sourceLineNo">114</span> assertEquals("Table " + TABLE_NAME + " should have 1 region", 1, regions.size());<a name="line.114"></a>
-<span class="sourceLineNo">115</span> regionInfo = regions.get(0);<a name="line.115"></a>
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-<span class="sourceLineNo">117</span> for (Metric metric : Metric.values()) {<a name="line.117"></a>
-<span class="sourceLineNo">118</span> requestsMap.put(metric, 0L);<a name="line.118"></a>
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-<span class="sourceLineNo">122</span><a name="line.122"></a>
-<span class="sourceLineNo">123</span> private static Table createTable() throws IOException {<a name="line.123"></a>
-<span class="sourceLineNo">124</span> TableDescriptorBuilder builder = TableDescriptorBuilder.newBuilder(TABLE_NAME);<a name="line.124"></a>
-<span class="sourceLineNo">125</span> builder.addColumnFamily(ColumnFamilyDescriptorBuilder.of(CF1));<a name="line.125"></a>
-<span class="sourceLineNo">126</span> builder.addColumnFamily(ColumnFamilyDescriptorBuilder.newBuilder(CF2).setTimeToLive(TTL)<a name="line.126"></a>
-<span class="sourceLineNo">127</span> .build());<a name="line.127"></a>
-<span class="sourceLineNo">128</span> admin.createTable(builder.build());<a name="line.128"></a>
-<span class="sourceLineNo">129</span> return TEST_UTIL.getConnection().getTable(TABLE_NAME);<a name="line.129"></a>
-<span class="sourceLineNo">130</span> }<a name="line.130"></a>
-<span class="sourceLineNo">131</span><a name="line.131"></a>
-<span class="sourceLineNo">132</span> private static void testReadRequests(long resultCount,<a name="line.132"></a>
-<span class="sourceLineNo">133</span> long expectedReadRequests, long expectedFilteredReadRequests)<a name="line.133"></a>
-<span class="sourceLineNo">134</span> throws IOException, InterruptedException {<a name="line.134"></a>
-<span class="sourceLineNo">135</span> updateMetricsMap();<a name="line.135"></a>
-<span class="sourceLineNo">136</span> System.out.println("requestsMapPrev = " + requestsMapPrev);<a name="line.136"></a>
-<span class="sourceLineNo">137</span> System.out.println("requestsMap = " + requestsMap);<a name="line.137"></a>
-<span class="sourceLineNo">138</span><a name="line.138"></a>
-<span class="sourceLineNo">139</span> assertEquals(expectedReadRequests,<a name="line.139"></a>
-<span class="sourceLineNo">140</span> requestsMap.get(Metric.REGION_READ) - requestsMapPrev.get(Metric.REGION_READ));<a name="line.140"></a>
-<span class="sourceLineNo">141</span> boolean tablesOnMaster = LoadBalancer.isTablesOnMaster(TEST_UTIL.getConfiguration());<a name="line.141"></a>
-<span class="sourceLineNo">142</span> if (tablesOnMaster) {<a name="line.142"></a>
-<span class="sourceLineNo">143</span> // If NO tables on master, then the single regionserver in this test carries user-space<a name="line.143"></a>
-<span class="sourceLineNo">144</span> // tables and the meta table. The first time through, the read will be inflated by meta<a name="line.144"></a>
-<span class="sourceLineNo">145</span> // lookups. We don't know which test will be first through since junit randomizes. This<a name="line.145"></a>
-<span class="sourceLineNo">146</span> // method is used by a bunch of tests. Just do this check if master is hosting (system)<a name="line.146"></a>
-<span class="sourceLineNo">147</span> // regions only.<a name="line.147"></a>
-<span class="sourceLineNo">148</span> assertEquals(expectedReadRequests,<a name="line.148"></a>
-<span class="sourceLineNo">149</span> requestsMap.get(Metric.SERVER_READ) - requestsMapPrev.get(Metric.SERVER_READ));<a name="line.149"></a>
-<span class="sourceLineNo">150</span> }<a name="line.150"></a>
-<span class="sourceLineNo">151</span> assertEquals(expectedFilteredReadRequests,<a name="line.151"></a>
-<span class="sourceLineNo">152</span> requestsMap.get(Metric.FILTERED_REGION_READ)<a name="line.152"></a>
-<span class="sourceLineNo">153</span> - requestsMapPrev.get(Metric.FILTERED_REGION_READ));<a name="line.153"></a>
-<span class="sourceLineNo">154</span> assertEquals(expectedFilteredReadRequests,<a name="line.154"></a>
-<span class="sourceLineNo">155</span> requestsMap.get(Metric.FILTERED_SERVER_READ)<a name="line.155"></a>
-<span class="sourceLineNo">156</span> - requestsMapPrev.get(Metric.FILTERED_SERVER_READ));<a name="line.156"></a>
-<span class="sourceLineNo">157</span> assertEquals(expectedReadRequests, resultCount);<a name="line.157"></a>
-<span class="sourceLineNo">158</span> }<a name="line.158"></a>
-<span class="sourceLineNo">159</span><a name="line.159"></a>
-<span class="sourceLineNo">160</span> private static void updateMetricsMap() throws IOException, InterruptedException {<a name="line.160"></a>
-<span class="sourceLineNo">161</span> for (Metric metric : Metric.values()) {<a name="line.161"></a>
-<span class="sourceLineNo">162</span> requestsMapPrev.put(metric, requestsMap.get(metric));<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> ServerLoad serverLoad = null;<a name="line.165"></a>
-<span class="sourceLineNo">166</span> RegionLoad regionLoadOuter = null;<a name="line.166"></a>
-<span class="sourceLineNo">167</span> boolean metricsUpdated = false;<a name="line.167"></a>
-<span class="sourceLineNo">168</span> for (int i = 0; i < MAX_TRY; i++) {<a name="line.168"></a>
-<span class="sourceLineNo">169</span> for (ServerName serverName : serverNames) {<a name="line.169"></a>
-<span class="sourceLineNo">170</span> serverLoad = new ServerLoad(admin.getClusterMetrics(EnumSet.of(Option.LIVE_SERVERS))<a name="line.170"></a>
-<span class="sourceLineNo">171</span> .getLiveServerMetrics().get(serverName));<a name="line.171"></a>
-<span class="sourceLineNo">172</span><a name="line.172"></a>
-<span class="sourceLineNo">173</span> Map<byte[], RegionLoad> regionsLoad = serverLoad.getRegionsLoad();<a name="line.173"></a>
-<span class="sourceLineNo">174</span> RegionLoad regionLoad = regionsLoad.get(regionInfo.getRegionName());<a name="line.174"></a>
-<span class="sourceLineNo">175</span> if (regionLoad != null) {<a name="line.175"></a>
-<span class="sourceLineNo">176</span> regionLoadOuter = regionLoad;<a name="line.176"></a>
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-<span class="sourceLineNo">178</span> if (getReadRequest(serverLoad, regionLoad, metric) > requestsMapPrev.get(metric)) {<a name="line.178"></a>
-<span class="sourceLineNo">179</span> for (Metric metricInner : Metric.values()) {<a name="line.179"></a>
-<span class="sourceLineNo">180</span> requestsMap.put(metricInner, getReadRequest(serverLoad, regionLoad, metricInner));<a name="line.180"></a>
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-<span class="sourceLineNo">194</span> for (Metric metric : Metric.values()) {<a name="line.194"></a>
-<span class="sourceLineNo">195</span> requestsMap.put(metric, getReadRequest(serverLoad, regionLoadOuter, metric));<a name="line.195"></a>
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-<span class="sourceLineNo">202</span> case REGION_READ:<a name="line.202"></a>
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-<span class="sourceLineNo">217</span><a name="line.217"></a>
-<span class="sourceLineNo">218</span> put = new Put(ROW1);<a name="line.218"></a>
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-<span class="sourceLineNo">220</span> put.addColumn(CF1, COL2, VAL2);<a name="line.220"></a>
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-<span class="sourceLineNo">222</span> table.put(put);<a name="line.222"></a>
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-<span class="sourceLineNo">226</span> table.put(put);<a name="line.226"></a>
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-<span class="sourceLineNo">228</span> put.addColumn(CF1, COL1, VAL1);<a name="line.228"></a>
-<span class="sourceLineNo">229</span> put.addColumn(CF1, COL2, VAL2);<a name="line.229"></a>
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-<span class="sourceLineNo">235</span><a name="line.235"></a>
-<span class="sourceLineNo">236</span> put = new Put(ROW1);<a name="line.236"></a>
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-<span class="sourceLineNo">238</span> put.addColumn(CF2, COL2, VAL2);<a name="line.238"></a>
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+<span class="sourceLineNo">066</span>import org.junit.Ignore;<a name="line.66"></a>
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+<span class="sourceLineNo">115</span> List<RegionInfo> regions = admin.getRegions(TABLE_NAME);<a name="line.115"></a>
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+<span class="sourceLineNo">136</span> throws IOException, InterruptedException {<a name="line.136"></a>
+<span class="sourceLineNo">137</span> updateMetricsMap();<a name="line.137"></a>
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+<span class="sourceLineNo">139</span> System.out.println("requestsMap = " + requestsMap);<a name="line.139"></a>
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+<span class="sourceLineNo">166</span><a name="line.166"></a>
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+<span class="sourceLineNo">171</span> for (ServerName serverName : serverNames) {<a name="line.171"></a>
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+<span class="sourceLineNo">181</span> for (Metric metricInner : Metric.values()) {<a name="line.181"></a>
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+<span class="sourceLineNo">199</span> }<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>
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+<span class="sourceLineNo">216</span><a name="line.216"></a>
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+<span class="sourceLineNo">222</span> put.addColumn(CF1, COL2, VAL2);<a name="line.222"></a>
+<span class="sourceLineNo">223</span> put.addColumn(CF1, COL3, VAL3);<a name="line.223"></a>
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+<span class="sourceLineNo">231</span> put.addColumn(CF1, COL2, VAL2);<a name="line.231"></a>
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+<span class="sourceLineNo">240</span> put.addColumn(CF2, COL2, VAL2);<a name="line.240"></a>
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-<span class="sourceLineNo">245</span> put.addColumn(CF2, COL2, VAL2);<a name="line.245"></a>
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-<span class="sourceLineNo">263</span> Append append;<a name="line.263"></a>
-<span class="sourceLineNo">264</span> Put put;<a name="line.264"></a>
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-<span class="sourceLineNo">266</span> Get get;<a name="line.266"></a>
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-<span class="sourceLineNo">278</span> // test for scan<a name="line.278"></a>
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-<span class="sourceLineNo">308</span><a name="line.308"></a>
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-<span class="sourceLineNo">330</span> Scan scan;<a name="line.330"></a>
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+<span class="sourceLineNo">353</span> testReadRequests(resultCount, 1, 2);<a name="line.353"></a>
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+<span class="sourceLineNo">355</span><a name="line.355"></a>
+<span class="sourceLineNo">356</span> // test for scan<a name="line.356"></a>
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+<span class="sourceLineNo">358</span> scan.setFilter(new RowFilter(CompareFilter.CompareOp.EQUAL, new BinaryComparator(ROW1)));<a name="line.358"></a>
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+<span class="sourceLineNo">367</span> // fixme filtered get should not increase readRequestsCount<a name="line.367"></a>
+<span class="sourceLineNo">368</span>// Get get = new Get(ROW2);<a name="line.368"></a>
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+<span class="sourceLineNo">374</span><a name="line.374"></a>
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+<span class="sourceLineNo">378</span> Delete delete = new Delete(ROW3);<a name="line.378"></a>
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+<span class="sourceLineNo">380</span><a name="line.380"></a>
+<span class="sourceLineNo">381</span> Scan scan = new Scan();<a name="line.381"></a>
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+<span class="sourceLineNo">383</span> int resultCount = 0;<a name="line.383"></a>
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+<span class="sourceLineNo">387</span> testReadRequests(resultCount, 2, 1);<a name="line.387"></a>
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+<span class="sourceLineNo">389</span> } finally {<a name="line.389"></a>
+<span class="sourceLineNo">390</span> Put put = new Put(ROW3);<a name="line.390"></a>
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+<span class="sourceLineNo">392</span> put.addColumn(CF1, COL2, VAL2);<a name="line.392"></a>
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+<span class="sourceLineNo">395</span> }<a name="line.395"></a>
+<span class="sourceLineNo">396</span><a name="line.396"></a>
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+<span class="sourceLineNo">401</span> Scan scan = new Scan();<a name="line.401"></a>
+<span class="sourceLineNo">402</span> scan.addFamily(CF2);<a name="line.402"></a>
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+<span class="sourceLineNo">405</span> for (Result ignore : scanner) {<a name="line.405"></a>
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+<span class="sourceLineNo">410</span> }<a name="line.410"></a>
+<span class="sourceLineNo">411</span><a name="line.411"></a>
+<span class="sourceLineNo">412</span> @Test<a name="line.412"></a>
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+<span class="sourceLineNo">414</span> TableName tableName = TableName.valueOf("testReadRequestsWithCoprocessor");<a name="line.414"></a>
+<span class="sourceLineNo">415</span> TableDescriptorBuilder builder = TableDescriptorBuilder.newBuilder(tableName);<a name="line.415"></a>
+<span class="sourceLineNo">416</span> builder.addColumnFamily(ColumnFamilyDescriptorBuilder.of(CF1));<a name="line.416"></a>
+<span class="sourceLineNo">417</span> builder.addCoprocessor(ScanRegionCoprocessor.class.getName());<a name="line.417"></a>
+<span class="sourceLineNo">418</span> admin.createTable(builder.build());<a name="line.418"></a>
+<span class="sourceLineNo">419</span><a name="line.419"></a>
+<span class="sourceLineNo">420</span> try {<a name="line.420"></a>
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+<span class="sourceLineNo">424</span> boolean success = true;<a name="line.424"></a>
+<span class="sourceLineNo">425</span> int i = 0;<a name="line.425"></a>
+<span class="sourceLineNo">426</span> for (; i < MAX_TRY; i++) {<a name="line.426"></a>
+<span class="sourceLineNo">427</span> try {<a name="line.427"></a>
+<span class="sourceLineNo">428</span> testReadRequests(regionInfos.get(0).getRegionName(), 3);<a name="line.428"></a>
+<span class="sourceLineNo">429</span> } catch (Throwable t) {<a name="line.429"></a>
+<span class="sourceLineNo">430</span> LOG.warn("Got exception when try " + i + " times", t);<a name="line.430"></a>
+<span class="sourceLineNo">431</span> Thread.sleep(SLEEP_MS);<a name="line.431"></a>
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+<span class="sourceLineNo">437</span> }<a name="line.437"></a>
+<span class="sourceLineNo">438</span> if (i == MAX_TRY) {<a name="line.438"></a>
+<span class="sourceLineNo">439</span> fail("Failed to get right read requests metric after try " + i + " times");<a name="line.439"></a>
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+<span class="sourceLineNo">441</span> } finally {<a name="line.441"></a>
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+<span class="sourceLineNo">443</span> admin.deleteTable(tableName);<a name="line.443"></a>
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+<span class="sourceLineNo">445</span> }<a name="line.445"></a>
+<span class="sourceLineNo">446</span><a name="line.446"></a>
+<span class="sourceLineNo">447</span> private void testReadRequests(byte[] regionName, int expectedReadRequests) throws Exception {<a name="line.447"></a>
+<span class="sourceLineNo">448</span> for (ServerName serverName : serverNames) {<a name="line.448"></a>
+<span class="sourceLineNo">449</span> ServerLoad serverLoad = new ServerLoad(admin.getClusterMetrics(<a name="line.449"></a>
+<span class="sourceLineNo">450</span> EnumSet.of(Option.LIVE_SERVERS)).getLiveServerMetrics().get(serverName));<a name="line.450"></a>
+<span class="sourceLineNo">451</span> Map<byte[], RegionLoad> regionsLoad = serverLoad.getRegionsLoad();<a name="line.451"></a>
+<span class="sourceLineNo">452</span> RegionLoad regionLoad = regionsLoad.get(regionName);<a name="line.452"></a>
+<span class="sourceLineNo">453</span> if (regionLoad != null) {<a name="line.453"></a>
+<span class="sourceLineNo">454</span> LOG.debug("server read request is " + serverLoad.getReadRequestsCount()<a name="line.454"></a>
+<span class="sourceLineNo">455</span> + ", region read request is " + regionLoad.getReadRequestsCount());<a name="line.455"></a>
+<span class="sourceLineNo">456</span> assertEquals(3, serverLoad.getReadRequestsCount());<a name="line.456"></a>
+<span class="sourceLineNo">457</span> assertEquals(3, regionLoad.getReadRequestsCount());<a name="line.457"></a>
+<span class="sourceLineNo">458</span> }<a name="line.458"></a>
+<span class="sourceLineNo">459</span> }<a name="line.459"></a>
+<span class="sourceLineNo">460</span> }<a name="line.460"></a>
+<span class="sourceLineNo">461</span><a name="line.461"></a>
+<span class="sourceLineNo">462</span> public static class ScanRegionCoprocessor implements RegionCoprocessor, RegionObserver {<a name="line.462"></a>
+<span class="sourceLineNo">463</span> @Override<a name="line.463"></a>
+<span class="sourceLineNo">464</span> public Optional<RegionObserver> getRegionObserver() {<a name="line.464"></a>
+<span class="sourceLineNo">465</span> return Optional.of(this);<a name="line.465"></a>
+<span class="sourceLineNo">466</span> }<a name="line.466"></a>
+<span class="sourceLineNo">467</span><a name="line.467"></a>
+<span class="sourceLineNo">468</span> @Override<a name="line.468"></a>
+<span class="sourceLineNo">469</span> public void postOpen(ObserverContext<RegionCoprocessorEnvironment> c) {<a name="line.469"></a>
+<span class="sourceLineNo">470</span> RegionCoprocessorEnvironment env = c.getEnvironment();<a name="line.470"></a>
+<span class="sourceLineNo">471</span> Region region = env.getRegion();<a name="line.471"></a>
+<span class="sourceLineNo">472</span> try {<a name="line.472"></a>
+<span class="sourceLineNo">473</span> putData(region);<a name="line.473"></a>
+<span class="sourceLineNo">474</span> RegionScanner scanner = region.getScanner(new Scan());<a name="line.474"></a>
+<span class="sourceLineNo">475</span> List<Cell> result = new LinkedList<>();<a name="line.475"></a>
+<span class="sourceLineNo">476</span> while (scanner.next(result)) {<a name="line.476"></a>
+<span class="sourceLineNo">477</span> result.clear();<a name="line.477"></a>
+<span class="sourceLineNo">478</span> }<a name="line.478"></a>
+<span class="sourceLineNo">479</span> } catch (Exception e) {<a name="line.479"></a>
+<span class="sourceLineNo">480</span> LOG.warn("Got exception in coprocessor", e);<a name="line.480"></a>
+<span class="sourceLineNo">481</span> }<a name="line.481"></a>
+<span class="sourceLineNo">482</span> }<a name="line.482"></a>
+<span class="sourceLineNo">483</span><a name="line.483"></a>
+<span class="sourceLineNo">484</span> private void putData(Region region) throws Exception {<a name="line.484"></a>
+<span class="sourceLineNo">485</span> Put put = new Put(ROW1);<a name="line.485"></a>
+<span class="sourceLineNo">486</span> put.addColumn(CF1, COL1, VAL1);<a name="line.486"></a>
+<span class="sourceLineNo">487</span> region.put(put);<a name="line.487"></a>
+<span class="sourceLineNo">488</span> put = new Put(ROW2);<a name="line.488"></a>
+<span class="sourceLineNo">489</span> put.addColumn(CF1, COL1, VAL1);<a name="line.489"></a>
+<span class="sourceLineNo">490</span> region.put(put);<a name="line.490"></a>
+<span class="sourceLineNo">491</span> put = new Put(ROW3);<a name="line.491"></a>
+<span class="sourceLineNo">492</span> put.addColumn(CF1, COL1, VAL1);<a name="line.492"></a>
+<span class="sourceLineNo">493</span> region.put(put);<a name="line.493"></a>
+<span class="sourceLineNo">494</span> }<a name="line.494"></a>
+<span class="sourceLineNo">495</span> }<a name="line.495"></a>
+<span class="sourceLineNo">496</span><a name="line.496"></a>
+<span class="sourceLineNo">497</span> private enum Metric {REGION_READ, SERVER_READ, FILTERED_REGION_READ, FILTERED_SERVER_READ}<a name="line.497"></a>
+<span class="sourceLineNo">498</span>}<a name="line.498"></a>