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    *
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
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  package org.apache.hadoop.hbase.ipc;
  
  import org.apache.hadoop.hbase.CompatibilityFactory;
  import org.apache.hadoop.hbase.NotServingRegionException;
  import org.apache.hadoop.hbase.RegionTooBusyException;
  import org.apache.hadoop.hbase.ServerName;
  import org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException;
  import org.apache.hadoop.hbase.exceptions.RegionMovedException;
  import org.apache.hadoop.hbase.testclassification.SmallTests;
  import org.apache.hadoop.hbase.test.MetricsAssertHelper;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  
  import static org.junit.Assert.*;
  
  @Category(SmallTests.class)
  public class TestRpcMetrics {
    public MetricsAssertHelper HELPER = CompatibilityFactory.getInstance(MetricsAssertHelper.class);
  
    @Test
    public void testFactory() {
      MetricsHBaseServer masterMetrics = new MetricsHBaseServer("HMaster", new MetricsHBaseServerWrapperStub());
      MetricsHBaseServerSource masterSource = masterMetrics.getMetricsSource();
  
      MetricsHBaseServer rsMetrics = new MetricsHBaseServer("HRegionServer", new MetricsHBaseServerWrapperStub());
      MetricsHBaseServerSource rsSource = rsMetrics.getMetricsSource();
  
      assertEquals("master", masterSource.getMetricsContext());
      assertEquals("regionserver", rsSource.getMetricsContext());
  
      assertEquals("Master,sub=IPC", masterSource.getMetricsJmxContext());
      assertEquals("RegionServer,sub=IPC", rsSource.getMetricsJmxContext());
  
      assertEquals("Master", masterSource.getMetricsName());
      assertEquals("RegionServer", rsSource.getMetricsName());
    }
  
    /**
     * This test makes sure that the numbers from a MetricsHBaseServerWrapper are correctly exported
     * to hadoop metrics 2 system.
     */
    @Test
    public void testWrapperSource() {
      MetricsHBaseServer mrpc = new MetricsHBaseServer("HMaster", new MetricsHBaseServerWrapperStub());
      MetricsHBaseServerSource serverSource = mrpc.getMetricsSource();
      HELPER.assertGauge("queueSize", 101, serverSource);
      HELPER.assertGauge("numCallsInGeneralQueue", 102, serverSource);
      HELPER.assertGauge("numCallsInReplicationQueue", 103, serverSource);
      HELPER.assertGauge("numCallsInPriorityQueue", 104, serverSource);
      HELPER.assertGauge("numOpenConnections", 105, serverSource);
      HELPER.assertGauge("numActiveHandler", 106, serverSource);
      HELPER.assertGauge("numActiveWriteHandler", 50, serverSource);
      HELPER.assertGauge("numActiveReadHandler", 50, serverSource);
      HELPER.assertGauge("numActiveScanHandler", 6, serverSource);
      HELPER.assertGauge("numCallsInWriteQueue", 50, serverSource);
      HELPER.assertGauge("numCallsInReadQueue", 50, serverSource);
      HELPER.assertGauge("numCallsInScanQueue", 2, serverSource);
    }
  
    /**
     * Test to make sure that all the actively called method on MetricsHBaseServer work.
     */
    @Test
    public void testSourceMethods() {
      MetricsHBaseServer mrpc = new MetricsHBaseServer("HMaster", new MetricsHBaseServerWrapperStub());
      MetricsHBaseServerSource serverSource = mrpc.getMetricsSource();
  
      for (int i=0; i < 12; i++) {
        mrpc.authenticationFailure();
      }
      for (int i=0; i < 13; i++) {
        mrpc.authenticationSuccess();
      }
      HELPER.assertCounter("authenticationFailures", 12, serverSource);
      HELPER.assertCounter("authenticationSuccesses", 13, serverSource);
  
  
  
      for (int i=0; i < 14; i++) {
       mrpc.authorizationSuccess();
     }
     for (int i=0; i < 15; i++) {
       mrpc.authorizationFailure();
     }
     HELPER.assertCounter("authorizationSuccesses", 14, serverSource);
     HELPER.assertCounter("authorizationFailures", 15, serverSource);
 
 
     mrpc.dequeuedCall(100);
     mrpc.processedCall(101);
     mrpc.totalCall(102);
     HELPER.assertCounter("queueCallTime_NumOps", 1, serverSource);
     HELPER.assertCounter("processCallTime_NumOps", 1, serverSource);
     HELPER.assertCounter("totalCallTime_NumOps", 1, serverSource);
 
     mrpc.sentBytes(103);
     mrpc.sentBytes(103);
     mrpc.sentBytes(103);
 
     mrpc.receivedBytes(104);
     mrpc.receivedBytes(104);
 
     HELPER.assertCounter("sentBytes", 309, serverSource);
     HELPER.assertCounter("receivedBytes", 208, serverSource);
 
     mrpc.receivedRequest(105);
     mrpc.sentResponse(106);
     HELPER.assertCounter("requestSize_NumOps", 1, serverSource);
     HELPER.assertCounter("responseSize_NumOps", 1, serverSource);
 
     mrpc.exception(null);
     HELPER.assertCounter("exceptions", 1, serverSource);
 
     mrpc.exception(new RegionMovedException(ServerName.parseServerName("localhost:60020"), 100));
     mrpc.exception(new RegionTooBusyException());
     mrpc.exception(new OutOfOrderScannerNextException());
     mrpc.exception(new NotServingRegionException());
     HELPER.assertCounter("exceptions.RegionMovedException", 1, serverSource);
     HELPER.assertCounter("exceptions.RegionTooBusyException", 1, serverSource);
     HELPER.assertCounter("exceptions.OutOfOrderScannerNextException", 1, serverSource);
     HELPER.assertCounter("exceptions.NotServingRegionException", 1, serverSource);
     HELPER.assertCounter("exceptions", 5, serverSource);
   }
 
   @Test
   public void testServerContextNameWithHostName() {
     String[] masterServerNames = { "master/node-xyz/10.19.250.253:16020",
         "master/node-regionserver-xyz/10.19.250.253:16020", "HMaster/node-xyz/10.19.250.253:16020",
         "HMaster/node-regionserver-xyz/10.19.250.253:16020" };
 
     String[] regionServerNames = { "regionserver/node-xyz/10.19.250.253:16020",
         "regionserver/node-master1-xyz/10.19.250.253:16020",
         "HRegionserver/node-xyz/10.19.250.253:16020",
         "HRegionserver/node-master1-xyz/10.19.250.253:16020" };
 
     MetricsHBaseServerSource masterSource = null;
     for (String serverName : masterServerNames) {
       masterSource = new MetricsHBaseServer(serverName, new MetricsHBaseServerWrapperStub())
           .getMetricsSource();
       assertEquals("master", masterSource.getMetricsContext());
       assertEquals("Master,sub=IPC", masterSource.getMetricsJmxContext());
       assertEquals("Master", masterSource.getMetricsName());
     }
 
     MetricsHBaseServerSource rsSource = null;
     for (String serverName : regionServerNames) {
       rsSource = new MetricsHBaseServer(serverName, new MetricsHBaseServerWrapperStub())
           .getMetricsSource();
       assertEquals("regionserver", rsSource.getMetricsContext());
       assertEquals("RegionServer,sub=IPC", rsSource.getMetricsJmxContext());
       assertEquals("RegionServer", rsSource.getMetricsName());
     }
   }
 }