/
MultiReducedMetric.java
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/
MultiReducedMetric.java
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/**
* 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 org.apache.storm.metric.api.IMetric;
import java.util.HashMap;
import java.util.Map;
public class MultiReducedMetric implements IMetric {
Map<String, ReducedMetric> _value = new HashMap<>();
IReducer _reducer;
public MultiReducedMetric(IReducer reducer) {
_reducer = reducer;
}
public ReducedMetric scope(String key) {
ReducedMetric val = _value.get(key);
if(val == null) {
_value.put(key, val = new ReducedMetric(_reducer));
}
return val;
}
public Object getValueAndReset() {
Map ret = new HashMap();
for(Map.Entry<String, ReducedMetric> e : _value.entrySet()) {
Object val = e.getValue().getValueAndReset();
if(val != null) {
ret.put(e.getKey(), val);
}
}
return ret;
}
}