content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.metrics.source;
  
  import com.codahale.metrics.MetricRegistry;
  import com.codahale.metrics.jvm.GarbageCollectorMetricSet;
  import com.codahale.metrics.jvm.MemoryUsageGaugeSet;
  
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * A Source which collects JVM metrics, including JVM memory usage, GC counts, GC times, etc.
   */
  @ThreadSafe
  public class JvmSource implements Source {
    private static final String JVM_SOURCE_NAME = "jvm";
    private final MetricRegistry mMetricRegistry;
  
    /**
     * Creates a new {@link JvmSource} and register all JVM metrics.
     */
    public JvmSource() {
      mMetricRegistry = new MetricRegistry();
      mMetricRegistry.registerAll(new GarbageCollectorMetricSet());
      mMetricRegistry.registerAll(new MemoryUsageGaugeSet());
    }
  
    @Override
    public String getName() {
      return JVM_SOURCE_NAME;
    }
  
    @Override
    public MetricRegistry getMetricRegistry() {
      return mMetricRegistry;
    }
  }
  