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;
  
  import java.io.IOException;
  
  import org.junit.AfterClass;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.cql3.CQLTester;
  import org.apache.cassandra.tools.ToolRunner.ToolResult;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static java.lang.String.format;
  
  public class NodeProbeTest extends CQLTester
  {
      private static NodeProbe probe;
  
      @BeforeClass
      public static void setup() throws Exception
      {
          requireNetwork();
          startJMXServer();
          probe = new NodeProbe(jmxHost, jmxPort);
      }
  
      @AfterClass
      public static void teardown() throws IOException
      {
          probe.close();
      }
  
      /**
       * Verify that nodetool -j/--jobs option warning is raised depending on the value of
       * {@link org.apache.cassandra.config.Config#concurrent_compactors} in the target node, independently of where the
       * tool is used.
       *
       * Before CASSANDRA-16104 the warning was based on the local value of {@code concurrent_compactors}, and not in the
       * value used in the target node, which is got through JMX.
       */
      @Test
      public void testCheckJobs()
      {
          int compactors = probe.getConcurrentCompactors();
          int jobs = compactors + 1;
  
          // Verify that trying to use more jobs than configured concurrent compactors prints a warning
          ToolResult toolResult = ToolRunner.invokeNodetool("upgradesstables", "-j", String.valueOf(jobs));
          toolResult.assertOnCleanExit();
          assertThat(toolResult.getStdout()).contains(format("jobs (%d) is bigger than configured concurrent_compactors (%d) on the host, using at most %d threads",
                                                             jobs, compactors, compactors));
  
          // Increase the number of concurrent compactors and verify that the new number of concurrent compactors is seen
          // by subsequent validations
          assertToolResult(ToolRunner.invokeNodetool("setconcurrentcompactors", String.valueOf(jobs)));
          assertToolResult(ToolRunner.invokeNodetool("upgradesstables", "-j", String.valueOf(jobs)));
      }
  
      private static void assertToolResult(ToolResult toolResult)
      {
          assertThat(toolResult.getStdout()).isEmpty();
          toolResult.assertOnCleanExit();
      }
  }
  