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.sink;
  
  import com.codahale.metrics.MetricRegistry;
  import com.codahale.metrics.jmx.JmxReporter;
  
  import java.util.Properties;
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * A sink which listens for new metrics and exposes them as namespaces MBeans.
   */
  @ThreadSafe
  public final class JmxSink implements Sink {
    private static final String DOMAIN = "org.alluxio";
  
    private JmxReporter mReporter;
  
    /**
     * Creates a new {@link JmxSink} with a {@link Properties} and {@link MetricRegistry}.
     *
     * @param properties the properties
     * @param registry the metric registry to register
     */
    public JmxSink(Properties properties, MetricRegistry registry) {
      JmxReporter.Builder builder = JmxReporter.forRegistry(registry);
      String domain = properties.getProperty("domain");
      if (domain != null) {
        builder.inDomain(domain);
      } else {
        builder.inDomain(DOMAIN);
      }
      mReporter = builder.build();
    }
  
    @Override
    public void start() {
      mReporter.start();
    }
  
    @Override
    public void stop() {
      mReporter.stop();
    }
  
    @Override
    public void report() {
    }
  }
  