content: /*
   * 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.
   */
  
  package org.apache.cassandra.tools.nodetool;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import org.apache.commons.lang3.tuple.Pair;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.cql3.CQLTester;
  import org.apache.cassandra.net.Message;
  import org.apache.cassandra.net.MessagingService;
  import org.apache.cassandra.net.NoPayload;
  import org.apache.cassandra.tools.ToolRunner;
  import org.apache.cassandra.utils.FBUtilities;
  import org.apache.cassandra.utils.JsonUtils;
  import org.yaml.snakeyaml.Yaml;
  
  import static org.apache.cassandra.net.Verb.ECHO_REQ;
  import static org.assertj.core.api.Assertions.assertThat;
  
  public class TpStatsTest extends CQLTester
  {
  
      @BeforeClass
      public static void setup() throws Exception
      {
          requireNetwork();
          startJMXServer();
      }
  
      @Test
      public void testTpStats() throws Throwable
      {
          ToolRunner.ToolResult tool = ToolRunner.invokeNodetool("tpstats");
          tool.assertOnCleanExit();
          String stdout = tool.getStdout();
          assertThat(stdout).containsPattern("Pool Name \\s+ Active Pending Completed Blocked All time blocked");
          assertThat(stdout).contains("Latencies waiting in queue (micros) per dropped message types");
  
          // Does inserting data alter tpstats?
          String nonZeroedThreadsRegExp = "((?m)\\D.*[1-9].*)";
          ArrayList<String> origStats = getAllGroupMatches(nonZeroedThreadsRegExp, stdout);
          Collections.sort(origStats);
  
          createTable("CREATE TABLE %s (pk int, c int, PRIMARY KEY(pk))");
          execute("INSERT INTO %s (pk, c) VALUES (?, ?)", 1, 1);
          flush();
  
          tool = ToolRunner.invokeNodetool("tpstats");
          tool.assertOnCleanExit();
          stdout = tool.getStdout();
          ArrayList<String> newStats = getAllGroupMatches(nonZeroedThreadsRegExp, stdout);
          Collections.sort(newStats);
  
          assertThat(origStats).isNotEqualTo(newStats);
  
          // Does sending a message alter Gossip & ECHO stats?
          String origGossip = getAllGroupMatches("((?m)GossipStage.*)", stdout).get(0);
          assertThat(stdout).doesNotContainPattern("ECHO_REQ\\D.*[1-9].*");
          assertThat(stdout).doesNotContainPattern("ECHO_RSP\\D.*[1-9].*");
  
          Message<NoPayload> echoMessageOut = Message.out(ECHO_REQ, NoPayload.noPayload);
          MessagingService.instance().send(echoMessageOut, FBUtilities.getBroadcastAddressAndPort());
  
          tool = ToolRunner.invokeNodetool("tpstats");
          tool.assertOnCleanExit();
          stdout = tool.getStdout();
          String newGossip = getAllGroupMatches("((?m)GossipStage.*)", stdout).get(0);
  
          assertThat(origGossip).isNotEqualTo(newGossip);
          assertThat(stdout).containsPattern("ECHO_REQ\\D.*[1-9].*");
          assertThat(stdout).containsPattern("ECHO_RSP\\D.*[0-9].*");
      }
  
      @Test
      public void testFormatArg()
      {
          Arrays.asList(Pair.of("-F", "json"), Pair.of("--format", "json")).forEach(arg -> {
              ToolRunner.ToolResult tool = ToolRunner.invokeNodetool("tpstats", arg.getLeft(), arg.getRight());
              tool.assertOnCleanExit();
              String json = tool.getStdout();
              assertThat(isJSONString(json)).isTrue();
              assertThat(json).containsPattern("\"WaitLatencies\"\\s*:\\s*\\{\\s*\"");
          });
  
          Arrays.asList( Pair.of("-F", "yaml"), Pair.of("--format", "yaml")).forEach(arg -> {
              ToolRunner.ToolResult tool = ToolRunner.invokeNodetool("tpstats", arg.getLeft(), arg.getRight());
              tool.assertOnCleanExit();
              String yaml = tool.getStdout();
              assertThat(isYAMLString(yaml)).isTrue();
              assertThat(yaml).containsPattern("WaitLatencies:\\s*[A-Z|_]+:\\s+-\\s");
          });
      }
  
      public static boolean isJSONString(String str)
      {
          try
          {
              JsonUtils.JSON_OBJECT_MAPPER.readTree(str);
              return true;
          }
          catch(IOException e)
          {
              return false;
          }
      }
  
      public static boolean isYAMLString(String str)
      {
          try
          {
              Yaml yaml = new Yaml();
              yaml.load(str);
              return true;
          }
          catch(Exception e)
          {
              return false;
          }
      }
  
      private ArrayList<String> getAllGroupMatches(String regExp, String in)
      {
          Pattern pattern = Pattern.compile(regExp);
          Matcher m = pattern.matcher(in);
  
          ArrayList<String> matches = new ArrayList<>();
          while (m.find())
              matches.add(m.group(1));
  
          return matches;
      }
  }
  