/*
 * Copyright 2017 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.internal;

import io.grpc.Attributes;
import io.grpc.ClientStreamTracer;
import io.grpc.Metadata;
import io.grpc.MethodDescriptor;
import io.grpc.ServerStreamTracer;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;

/**
 * Benchmark for {@link StatsTraceContext}.
 */
@State(Scope.Benchmark)
public class StatsTraceContextBenchmark {

  private final String methodName = MethodDescriptor.generateFullMethodName("service", "method");

  private final Metadata emptyMetadata = new Metadata();
  private final List<ServerStreamTracer.Factory> serverStreamTracerFactories =
      Collections.emptyList();

  /**
   * Javadoc comment.
   */
  @Benchmark
  @BenchmarkMode(Mode.SampleTime)
  @OutputTimeUnit(TimeUnit.NANOSECONDS)
  public StatsTraceContext newClientContext() {
    return StatsTraceContext.newClientContext(
        new ClientStreamTracer[] { new ClientStreamTracer() {} }, Attributes.EMPTY, emptyMetadata);
  }

  /**
   * Javadoc comment.
   */
  @Benchmark
  @BenchmarkMode(Mode.SampleTime)
  @OutputTimeUnit(TimeUnit.NANOSECONDS)
  public StatsTraceContext newServerContext_empty() {
    return StatsTraceContext.newServerContext(
        serverStreamTracerFactories, methodName, emptyMetadata);
  }
}