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.sidecar.testing.bytebuddy;
  
  import java.util.concurrent.Callable;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.Future;
  import java.util.concurrent.TimeUnit;
  
  import net.bytebuddy.ByteBuddy;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.dynamic.ClassFileLocator;
  import net.bytebuddy.dynamic.TypeResolutionStrategy;
  import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
  import net.bytebuddy.implementation.MethodDelegation;
  import net.bytebuddy.implementation.bind.annotation.SuperCall;
  import net.bytebuddy.pool.TypePool;
  
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static org.apache.cassandra.sidecar.testing.IntegrationTestBase.awaitLatchOrTimeout;
  
  /**
   * ByteBuddy Helper for a single moving node
   * Note that the helper cannot be used by multiple tests simultaneously in the same JVM
   */
  public class BBHelperMovingNode
  {
      public static CountDownLatch transientStateStart = new CountDownLatch(1);
      public static CountDownLatch transientStateEnd = new CountDownLatch(1);
  
      public static void install(ClassLoader cl, int nodeNumber, int movingNodeIndex)
      {
          if (nodeNumber == movingNodeIndex)
          {
              TypePool typePool = TypePool.Default.of(cl);
              TypeDescription description = typePool.describe("org.apache.cassandra.service.RangeRelocator")
                                                    .resolve();
              new ByteBuddy().rebase(description, ClassFileLocator.ForClassLoader.of(cl))
                             .method(named("stream"))
                             .intercept(MethodDelegation.to(BBHelperMovingNode.class))
                             // Defer class loading until all dependencies are loaded
                             .make(TypeResolutionStrategy.Lazy.INSTANCE, typePool)
                             .load(cl, ClassLoadingStrategy.Default.INJECTION);
          }
      }
  
      @SuppressWarnings("unused")
      public static Future<?> stream(@SuperCall Callable<Future<?>> orig) throws Exception
      {
          Future<?> res = orig.call();
          transientStateStart.countDown();
          awaitLatchOrTimeout(transientStateEnd, 2, TimeUnit.MINUTES, "transientStateEnd");
          return res;
      }
  
      public static void reset()
      {
          transientStateStart = new CountDownLatch(1);
          transientStateEnd = new CountDownLatch(1);
      }
  }
  