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.distributed.test;
  
  import com.google.common.util.concurrent.Uninterruptibles;
  import org.apache.cassandra.concurrent.Stage;
  import org.apache.cassandra.config.CassandraRelevantProperties;
  import org.apache.cassandra.distributed.Cluster;
  import org.apache.cassandra.distributed.api.IInstanceConfig;
  import org.apache.cassandra.service.paxos.ContentionStrategy;
  import org.apache.cassandra.utils.FBUtilities;
  import org.junit.AfterClass;
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import java.util.Map;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.Future;
  import java.util.concurrent.TimeUnit;
  import java.util.function.Consumer;
  
  import static org.apache.cassandra.config.CassandraRelevantProperties.PAXOS_USE_SELF_EXECUTION;
  import static org.apache.cassandra.distributed.api.ConsistencyLevel.QUORUM;
  import static org.apache.cassandra.net.Verb.PAXOS2_PREPARE_REQ;
  
  public class CASContentionTest extends CASTestBase
  {
      private static Cluster THREE_NODES;
  
      static
      {
          CassandraRelevantProperties.TCM_USE_ATOMIC_LONG_PROCESSOR.setBoolean(true);
      }
  
      @BeforeClass
      public static void beforeClass() throws Throwable
      {
          PAXOS_USE_SELF_EXECUTION.setBoolean(false);
          TestBaseImpl.beforeClass();
          Consumer<IInstanceConfig> conf = config -> config
                  .set("paxos_variant", "v2")
                  .set("write_request_timeout_in_ms", 20000L)
                  .set("cas_contention_timeout_in_ms", 20000L)
                  .set("request_timeout_in_ms", 20000L);
          THREE_NODES = init(Cluster.create(3, conf));
      }
  
      @AfterClass
      public static void afterClass()
      {
          if (THREE_NODES != null)
              THREE_NODES.close();
      }
  
      @Test
      public void testDynamicContentionTracing() throws Throwable
      {
          try
          {
  
              String tableName = tableName("tbl");
              THREE_NODES.schemaChange("CREATE TABLE " + KEYSPACE + '.' + tableName + " (pk int, v int, PRIMARY KEY (pk))");
  
              CountDownLatch haveStarted = new CountDownLatch(1);
              CountDownLatch haveInvalidated = new CountDownLatch(1);
              THREE_NODES.verbs(PAXOS2_PREPARE_REQ).from(1).messagesMatching((from, to, verb) -> {
                  haveStarted.countDown();
                  Uninterruptibles.awaitUninterruptibly(haveInvalidated);
                  return false;
              }).drop();
              THREE_NODES.get(1).runOnInstance(() -> ContentionStrategy.setStrategy("trace=1"));
              Future<?> insert = THREE_NODES.get(1).async(() -> {
                  THREE_NODES.coordinator(1).execute("INSERT INTO " + KEYSPACE + '.' + tableName + " (pk, v) VALUES (1, 1) IF NOT EXISTS", QUORUM);
              }).call();
              haveStarted.await();
              THREE_NODES.coordinator(2).execute("INSERT INTO " + KEYSPACE + '.' + tableName + " (pk, v) VALUES (1, 1) IF NOT EXISTS", QUORUM);
              haveInvalidated.countDown();
              THREE_NODES.filters().reset();
              insert.get();
              Uninterruptibles.sleepUninterruptibly(1L, TimeUnit.SECONDS);
              THREE_NODES.forEach(i -> i.runOnInstance(() -> FBUtilities.waitOnFuture(Stage.TRACING.submit(() -> {}))));
              Object[][] result = THREE_NODES.coordinator(1).execute("SELECT parameters FROM system_traces.sessions", QUORUM);
              Assert.assertEquals(1, result.length);
              Assert.assertEquals(1, result[0].length);
              Assert.assertTrue(Map.class.isAssignableFrom(result[0][0].getClass()));
              Map<?, ?> params = (Map<?, ?>) result[0][0];
              Assert.assertEquals("SERIAL", params.get("consistency"));
              Assert.assertEquals(tableName, params.get("table"));
              Assert.assertEquals(KEYSPACE, params.get("keyspace"));
              Assert.assertEquals("1", params.get("partitionKey"));
              Assert.assertEquals("write", params.get("kind"));
          }
          finally
          {
              THREE_NODES.filters().reset();
          }
      }
  
  
  }
  