| /** |
| * 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 backtype.storm.metric.api; |
| |
| import backtype.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; |
| } |
| } |