| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache 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.apache.org/licenses/LICENSE-2.0 |
| * |
| * 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.apache.ignite.internal.util; |
| |
| import java.util.concurrent.atomic.AtomicLong; |
| import org.apache.ignite.lang.IgnitePredicate; |
| |
| /** |
| * Extended version of {@link AtomicLong}. |
| * <p> |
| * In addition to operations provided in java atomic data structures, this class |
| * also adds greater than and less than atomic set operations. |
| */ |
| public class GridAtomicLong extends AtomicLong { |
| /** */ |
| private static final long serialVersionUID = 0L; |
| |
| /** |
| * Creates a new AtomicLong with initial value {@code 0}. |
| */ |
| public GridAtomicLong() { |
| // No-op. |
| } |
| |
| /** |
| * Creates a new AtomicLong with the given initial value. |
| * |
| * @param initVal the initial value |
| */ |
| public GridAtomicLong(long initVal) { |
| super(initVal); |
| } |
| |
| /** |
| * Atomically updates value only if {@code check} value is greater |
| * than current value. |
| * |
| * @param check Value to check against. |
| * @param update Value to set. |
| * @return {@code True} if value was set. |
| */ |
| public boolean greaterAndSet(long check, long update) { |
| while (true) { |
| long cur = get(); |
| |
| if (check > cur) { |
| if (compareAndSet(cur, update)) |
| return true; |
| } |
| else |
| return false; |
| } |
| } |
| |
| /** |
| * Atomically updates value only if {@code check} value is greater |
| * than or equal to current value. |
| * |
| * @param check Value to check against. |
| * @param update Value to set. |
| * @return {@code True} if value was set. |
| */ |
| public boolean greaterEqualsAndSet(long check, long update) { |
| while (true) { |
| long cur = get(); |
| |
| if (check >= cur) { |
| if (compareAndSet(cur, update)) |
| return true; |
| } |
| else |
| return false; |
| } |
| } |
| |
| /** |
| * Atomically updates value only if {@code check} value is less |
| * than current value. |
| * |
| * @param check Value to check against. |
| * @param update Value to set. |
| * @return {@code True} if value was set. |
| */ |
| public boolean lessAndSet(long check, long update) { |
| while (true) { |
| long cur = get(); |
| |
| if (check < cur) { |
| if (compareAndSet(cur, update)) |
| return true; |
| } |
| else |
| return false; |
| } |
| } |
| |
| /** |
| * Atomically updates value only if {@code check} value is less |
| * than current value. |
| * |
| * @param check Value to check against. |
| * @param update Value to set. |
| * @return {@code True} if value was set. |
| */ |
| public boolean lessEqualsAndSet(long check, long update) { |
| while (true) { |
| long cur = get(); |
| |
| if (check <= cur) { |
| if (compareAndSet(cur, update)) |
| return true; |
| } |
| else |
| return false; |
| } |
| } |
| |
| /** |
| * Sets value only if it is greater than current one. |
| * |
| * @param update Value to set. |
| * @return {@code True} if value was set. |
| */ |
| public boolean setIfGreater(long update) { |
| while (true) { |
| long cur = get(); |
| |
| if (update > cur) { |
| if (compareAndSet(cur, update)) |
| return true; |
| } |
| else |
| return false; |
| } |
| } |
| |
| /** |
| * Sets value only if it is greater than or equals to current one. |
| * |
| * @param update Value to set. |
| * @return {@code True} if value was set. |
| */ |
| public boolean setIfGreaterEquals(long update) { |
| while (true) { |
| long cur = get(); |
| |
| if (update >= cur) { |
| if (compareAndSet(cur, update)) |
| return true; |
| } |
| else |
| return false; |
| } |
| } |
| |
| /** |
| * Sets value only if it is less than current one. |
| * |
| * @param update Value to set. |
| * @return {@code True} if value was set. |
| */ |
| public boolean setIfLess(long update) { |
| while (true) { |
| long cur = get(); |
| |
| if (update < cur) { |
| if (compareAndSet(cur, update)) |
| return true; |
| } |
| else |
| return false; |
| } |
| } |
| |
| /** |
| * Sets value only if it is less than or equals to current one. |
| * |
| * @param update Value to set. |
| * @return {@code True} if value was set. |
| */ |
| public boolean setIfLessEquals(long update) { |
| while (true) { |
| long cur = get(); |
| |
| if (update <= cur) { |
| if (compareAndSet(cur, update)) |
| return true; |
| } |
| else |
| return false; |
| } |
| } |
| |
| |
| /** |
| * Sets value only if it is not equals to current one. |
| * |
| * @param update Value to set. |
| * @return {@code True} if value was set. |
| */ |
| public boolean setIfNotEquals(long update) { |
| while (true) { |
| long cur = get(); |
| |
| if (update != cur) { |
| if (compareAndSet(cur, update)) |
| return true; |
| } |
| else |
| return false; |
| } |
| } |
| |
| /** |
| * Atomically updates value only if passed in predicate returns {@code true}. |
| * |
| * @param p Predicate to check. |
| * @param update Value to set. |
| * @return {@code True} if value was set. |
| */ |
| public boolean checkAndSet(IgnitePredicate<Long> p, long update) { |
| while (true) { |
| long cur = get(); |
| |
| if (p.apply(cur)) { |
| if (compareAndSet(cur, update)) |
| return true; |
| } |
| else |
| return false; |
| } |
| } |
| } |