storm-client/src/jvm/org/apache/storm/metric/api/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 {
    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;
    }

    @Override
    public Map<String, 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;
    }
}