/
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 java.util.HashMap;
import java.util.Map;
public class MultiReducedMetric implements IMetric {
Map<String, ReducedMetric> value = new HashMap<>();
IReducer reducer;
public MultiReducedMetric(IReducer reducer) {
this.reducer = reducer;
}
public ReducedMetric scope(String key) {
ReducedMetric val = value.get(key);
if (val == null) {
value.put(key, val = new ReducedMetric(reducer));
}
return val;
}
@Override
public Map<String, Object> getValueAndReset() {
Map<String, Object> 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;
}
}