context/src/jmh/java/io/grpc/AttachDetachBenchmark.java

/*
 * Copyright 2016 The gRPC Authors
 *
 * 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.grpc;

import io.grpc.Context.Key;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.GroupThreads;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;

/** StatusBenchmark. */
@State(Scope.Benchmark)
public class AttachDetachBenchmark {

  private final Key<Integer> key = Context.keyWithDefault("key", 9999);
  private final Context cu = Context.current().withValue(key, 8888);

  /**
   * Javadoc comment.
   */
  @Benchmark
  @BenchmarkMode(Mode.SampleTime)
  @OutputTimeUnit(TimeUnit.NANOSECONDS)
  @GroupThreads(6)
  public int attachDetach() {
    Context old = cu.attach();
    try {
      return key.get();
    } finally {
      Context.current().detach(old);
    }
  }
}