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.tcm;
  
  import java.io.IOException;
  
  import org.junit.Test;
  
  import java.util.concurrent.Callable;
  import java.util.concurrent.atomic.AtomicBoolean;
  
  import net.bytebuddy.ByteBuddy;
  import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
  import net.bytebuddy.implementation.MethodDelegation;
  import net.bytebuddy.implementation.bind.annotation.SuperCall;
  import org.apache.cassandra.distributed.Cluster;
  import org.apache.cassandra.distributed.api.ConsistencyLevel;
  import org.apache.cassandra.distributed.test.TestBaseImpl;
  import org.apache.cassandra.gms.FailureDetector;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.locator.ReplicaPlan;
  import org.apache.cassandra.tcm.ClusterMetadata;
  import org.apache.cassandra.tcm.ClusterMetadataService;
  import org.apache.cassandra.tcm.transformations.CustomTransformation;
  
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
  
  public class FailureDetectorRecomputeTest extends TestBaseImpl
  {
      @Test
      public void readTest() throws IOException
      {
          try (Cluster cluster = init(Cluster.build(3)
                                             .withInstanceInitializer(BB::install)
                                             .start()))
          {
              cluster.schemaChange(withKeyspace("create table %s.tbl (id int primary key)"));
              cluster.get(1).runOnInstance(() -> BB.enabled.set(true));
              for (int i = 0; i < 10; i++)
                  cluster.coordinator(1).execute(withKeyspace("select * from %s.tbl where id=?"), ConsistencyLevel.QUORUM, i);
          }
      }
  
      @Test
      public void writeTest() throws IOException
      {
          try (Cluster cluster = init(Cluster.build(3)
                                             .withInstanceInitializer(BB::install)
                                             .start()))
          {
              cluster.schemaChange(withKeyspace("create table %s.tbl (id int primary key)"));
              cluster.get(1).runOnInstance(() -> BB.enabled.set(true));
              for (int i = 0; i < 10; i++)
                  cluster.coordinator(1).execute(withKeyspace("insert into %s.tbl (id) values (?)"), ConsistencyLevel.QUORUM, i);
          }
      }
  
      public static class BB
      {
          public static AtomicBoolean enabled = new AtomicBoolean();
  
          public static void install(ClassLoader cl, int i)
          {
              new ByteBuddy().rebase(FailureDetector.class)
                             .method(named("isAlive").and(takesArguments(1)))
                             .intercept(MethodDelegation.to(FailureDetectorRecomputeTest.BB.class))
                             .make()
                             .load(cl, ClassLoadingStrategy.Default.INJECTION);
  
              new ByteBuddy().rebase(ReplicaPlan.AbstractForRead.class)
                             .method(named("stillAppliesTo").and(takesArguments(1)))
                             .intercept(MethodDelegation.to(FailureDetectorRecomputeTest.BB.class))
                             .make()
                             .load(cl, ClassLoadingStrategy.Default.INJECTION);
          }
  
          static int downNode = 1;
          public static boolean isAlive(InetAddressAndPort ep)
          {
              if (!enabled.get())
                  return true;
              enabled.set(false);
              ClusterMetadataService.instance().commit(CustomTransformation.make("hello"));
              enabled.set(true);
              return !ep.equals(InetAddressAndPort.getByNameUnchecked("127.0.0." + ((downNode % 3) + 1)));
          }
  
          public static boolean stillAppliesTo(ClusterMetadata metadata, @SuperCall Callable<Boolean> zuper) throws Exception
          {
              if (!enabled.get())
                  return true;
              downNode++;
              return zuper.call();
          }
      }
  }
  