MultiCountMetric.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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 org.apache.storm.metric.api;

import java.util.HashMap;
import java.util.Map;

public class MultiCountMetric implements IMetric {
  private Map<String, CountMetric> value = new HashMap<>();

  public MultiCountMetric() {
  }

  public CountMetric scope(String key) {
    CountMetric val = value.get(key);
    if (val == null) {
      value.put(key, val = new CountMetric());
    }
    return val;
  }

  public Object getValueAndReset() {
    Map<String, Object> ret = new HashMap<>();
    for (Map.Entry<String, CountMetric> e : value.entrySet()) {
      ret.put(e.getKey(), e.getValue().getValueAndReset());
    }
    return ret;
  }
}