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 */ 017package org.apache.camel.management.mbean; 018 019import java.util.concurrent.atomic.AtomicLong; 020 021public class StatisticMinimum extends Statistic { 022 023 private final AtomicLong value = new AtomicLong(-1); 024 025 public void updateValue(long newValue) { 026 // its okay its not 100% thread safe (these jmx counters are not guaranteed to be accurate for min/max values) 027 // if we use the atomic operation updateAndGet then the JVM creates a new lambda per call which creates a new object 028 // in the JVM and causes higher memory footprint 029 long current = value.get(); 030 if (current == -1 || current > newValue) { 031 value.set(newValue); 032 } 033 } 034 035 public long getValue() { 036 long num = value.get(); 037 return num == -1 ? 0 : num; 038 } 039 040 @Override 041 public boolean isUpdated() { 042 return value.get() != -1; 043 } 044 045 @Override 046 public String toString() { 047 return "" + value.get(); 048 } 049 050 public void reset() { 051 value.set(-1); 052 } 053 054}