001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.commons.monitoring.store; 018 019 import org.apache.commons.monitoring.Role; 020 import org.apache.commons.monitoring.counters.Counter; 021 import org.apache.commons.monitoring.gauges.Gauge; 022 023 import java.util.Collection; 024 import java.util.Map; 025 026 public interface DataStore { 027 Counter getOrCreateCounter(Counter.Key key); 028 void clearCounters(); 029 Collection<Counter> getCounters(); 030 void addToCounter(Counter defaultCounter, double delta); // sensitive method which need to be thread safe 031 032 Map<Long,Double> getGaugeValues(GaugeValuesRequest gaugeValuesRequest); 033 void createOrNoopGauge(Role role); 034 void addToGauge(Gauge gauge, long time, double value); 035 }