@Override
  public <T> T[] toArray(T[] a) {
    final Monitor monitor = this.monitor;
    monitor.enter();
    try {
      return q.toArray(a);
    } finally {
      monitor.leave();
    }
  }

  @CanIgnoreReturnValue // pushed down from class to method
  @Override
  public String toString() {
    final Monitor monitor = this.monitor;
    monitor.enter();
    try {
      return q.toString();

import com.google.caliper.Benchmark;
import com.google.caliper.Param;
import java.lang.reflect.Constructor;
import java.util.concurrent.BlockingQueue;

/**
 * Benchmarks for {@link Monitor}.
 *
 * @author Justin T. Sampson
 */
public class MonitorBenchmark {

  @Param({"10", "100", "1000"})
  int capacity;

  @Param({"Array", "Priority"})
  String queueType;