SlowMetricObserver.java

/**
 * Copyright 2013 Netflix, Inc.
 * <p/>
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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 com.netflix.servo.publish;

import com.netflix.servo.Metric;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;

public class SlowMetricObserver extends BaseMetricObserver {

  private static final Logger LOGGER =
      LoggerFactory.getLogger(SlowMetricObserver.class);

  private final MetricObserver wrappedObserver;

  private final long delay;

  public SlowMetricObserver(MetricObserver observer, long delay) {
    super("slow");
    this.wrappedObserver = observer;
    this.delay = delay;
  }

  public void updateImpl(List<Metric> metrics) {
    try {
      Thread.sleep(delay);
    } catch (InterruptedException e) {
      LOGGER.warn("sleep interrupted", e);
    }
    wrappedObserver.update(metrics);
  }
}