content: /*
   * Copyright (C) 2012 Facebook, Inc.
   *
   * Licensed 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 io.airlift.drift.integration;
  
  import com.google.common.util.concurrent.ListenableFuture;
  import io.airlift.drift.client.MethodInvocationFilter;
  import io.airlift.drift.transport.client.InvokeRequest;
  import io.airlift.drift.transport.client.MethodInvoker;
  
  import java.util.concurrent.atomic.AtomicInteger;
  
  import static com.google.common.util.concurrent.MoreExecutors.directExecutor;
  import static org.testng.Assert.assertEquals;
  
  class TestingFilter
          implements MethodInvocationFilter
  {
      private final AtomicInteger requestCount = new AtomicInteger();
      private final AtomicInteger replyCount = new AtomicInteger();
  
      @Override
      public ListenableFuture<Object> invoke(InvokeRequest request, MethodInvoker next)
      {
          requestCount.getAndIncrement();
          ListenableFuture<Object> result = next.invoke(request);
          result.addListener(replyCount::getAndIncrement, directExecutor());
          return result;
      }
  
      public void assertCounts(int invocationCount)
      {
          assertEquals(requestCount.get(), invocationCount, "requestCount");
          assertEquals(replyCount.get(), invocationCount, "replyCount");
      }
  }
  