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 StatisticMaximum extends Statistic { 022 023 private final AtomicLong value = new AtomicLong(-1); 024 025 @Override 026 public void updateValue(long newValue) { 027 // its okay its not 100% thread safe (these jmx counters are not guaranteed to be accurate for min/max values) 028 // if we use the atomic operation updateAndGet then the JVM creates a new lambda per call which creates a new object 029 // in the JVM and causes higher memory footprint 030 long current = value.get(); 031 if (current == -1 || current < newValue) { 032 value.set(newValue); 033 } 034 } 035 036 @Override 037 public long getValue() { 038 long num = value.get(); 039 return num == -1 ? 0 : num; 040 } 041 042 @Override 043 public boolean isUpdated() { 044 return value.get() != -1; 045 } 046 047 @Override 048 public String toString() { 049 return "" + value.get(); 050 } 051 052 @Override 053 public void reset() { 054 value.set(-1); 055 } 056 057}