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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.
   */
  
  package org.apache.cassandra.distributed.test;
  
  import java.io.IOException;
  import java.util.concurrent.Callable;
  import java.util.concurrent.atomic.AtomicBoolean;
  import java.util.concurrent.atomic.AtomicInteger;
  import java.util.stream.Collectors;
  
  import org.junit.Test;
  
  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.cql3.ColumnSpecification;
  import org.apache.cassandra.cql3.QueryOptions;
  import org.apache.cassandra.cql3.statements.ModificationStatement;
  import org.apache.cassandra.cql3.statements.SelectStatement;
  import org.apache.cassandra.distributed.Cluster;
  import org.apache.cassandra.distributed.api.ConsistencyLevel;
  import org.apache.cassandra.service.QueryState;
  import org.apache.cassandra.transport.Dispatcher;
  import org.apache.cassandra.transport.messages.ResultMessage;
  import org.apache.cassandra.transport.messages.ResultMessage.Rows;
  
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.fail;
  
  public class ByteBuddyExamplesTest extends TestBaseImpl
  {
      @Test
      public void writeFailureTest() throws Throwable
      {
          try(Cluster cluster = init(Cluster.build(1)
                                            .withInstanceInitializer(BBFailHelper::install)
                                            .start()))
          {
              cluster.schemaChange("create table " + KEYSPACE + ".tbl (id int primary key, t int)");
              cluster.get(1).runOnInstance(() -> BBFailHelper.enabled.set(true));
              try
              {
                  cluster.coordinator(1).execute("insert into " + KEYSPACE + ".tbl (id, t) values (1, 1)", ConsistencyLevel.ALL);
                  fail("Should fail");
              }
              catch (RuntimeException e)
              {
                  // expected
              }
          }
      }
  
      public static class BBFailHelper
      {
          static void install(ClassLoader cl, int nodeNumber)
          {
              new ByteBuddy().rebase(ModificationStatement.class)
                             .method(named("execute"))
                             .intercept(MethodDelegation.to(BBFailHelper.class))
                             .make()
                             .load(cl, ClassLoadingStrategy.Default.INJECTION);
          }
  
          public static AtomicBoolean enabled = new AtomicBoolean(false);
  
          public static ResultMessage execute(QueryState v1, QueryOptions v2, Dispatcher.RequestTime v3, @SuperCall Callable<ResultMessage> zuper) throws Exception
          {
              if (enabled.get())
                  throw new RuntimeException();
  
              return zuper.call();
          }
      }
  
      @Test
      public void countTest() throws IOException
      {
          try(Cluster cluster = init(Cluster.build(2)
                                            .withInstanceInitializer(BBCountHelper::install)
                                            .start()))
          {
              cluster.schemaChange("create table " + KEYSPACE + ".tbl (id int primary key, bytebuddy_test_column int)");
              cluster.get(1).runOnInstance(() -> BBCountHelper.count.set(0));
              cluster.coordinator(1).execute("select * from " + KEYSPACE + ".tbl;", ConsistencyLevel.ALL);
              cluster.coordinator(2).execute("select * from " + KEYSPACE + ".tbl;", ConsistencyLevel.ALL);
              cluster.get(1).runOnInstance(() -> {
                  assertEquals(1, BBCountHelper.count.get());
              });
              cluster.get(2).runOnInstance(() -> {
                  assertEquals(0, BBCountHelper.count.get());
              });
  
          }
      }
  
      public static class BBCountHelper
      {
          static AtomicInteger count = new AtomicInteger();
          static void install(ClassLoader cl, int nodeNumber)
          {
              if (nodeNumber != 1)
                  return;
              new ByteBuddy().rebase(SelectStatement.class)
                             .method(named("execute").and(takesArguments(3)))
                             .intercept(MethodDelegation.to(BBCountHelper.class))
                             .make()
                             .load(cl, ClassLoadingStrategy.Default.INJECTION);
          }
  
          public static ResultMessage.Rows execute(QueryState state, QueryOptions options, Dispatcher.RequestTime request3Time, @SuperCall Callable<ResultMessage.Rows> r) throws Exception
          {
              Rows res = r.call();
  
              if (res.result.metadata.names.stream().map(ColumnSpecification::toString).collect(Collectors.toList()).contains("bytebuddy_test_column"))
                  count.incrementAndGet();
  
              return res;
          }
      }
  
  }
  