org.kuali.common.util.LongCounter Maven / Gradle / Ivy
/**
* Copyright 2010-2013 The Kuali Foundation
*
* Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
*
* 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 org.kuali.common.util;
public class LongCounter {
long count;
public LongCounter() {
this(0);
}
public LongCounter(long startValue) {
super();
this.count = startValue;
}
public synchronized long increment() {
return increment(1);
}
public synchronized long increment(long amount) {
Assert.isTrue(amount > 0, "amount must be > 0");
Assert.isTrue(count <= Long.MAX_VALUE - amount, "max value exceeded");
return count += amount;
}
public synchronized long decrement(long amount) {
Assert.isTrue(amount > 0, "amount must be > 0");
Assert.isTrue(count >= Long.MIN_VALUE + amount, "min value exceeded");
return count -= amount;
}
public synchronized long decrement() {
return decrement(1);
}
public synchronized long getValue() {
return count;
}
}