MockMetricPoller.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 com.netflix.servo.util.UnmodifiableList;

import java.util.List;

public class MockMetricPoller extends BaseMetricPoller {

  private List<Metric> metrics;
  private long delay;
  private boolean die;

  public MockMetricPoller() {
    metrics = UnmodifiableList.of();
    delay = 0L;
  }

  public void setMetrics(List<Metric> metrics) {
    this.metrics = UnmodifiableList.copyOf(metrics);
  }

  public void setDelay(long delay) {
    this.delay = delay;
  }

  public void setDie(boolean die) {
    this.die = die;
  }

  public List<Metric> pollImpl(boolean reset) {
    if (die) {
      throw new IllegalStateException("die");
    }

    try {
      Thread.sleep(delay);
    } catch (InterruptedException e) {
      System.err.println("Ignoring " + e.getMessage());
    }
    return metrics;
  }
}