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}