com.hazelcast.core.IAtomicLong Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2018, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.core;
/**
* IAtomicLong is a redundant and highly available distributed alternative to the
* {@link java.util.concurrent.atomic.AtomicLong java.util.concurrent.atomic.AtomicLong}.
*
* Asynchronous variants of all methods have been introduced in version 3.7.
* Async methods return immediately an {@link ICompletableFuture} from which the operation's result
* can be obtained either in a blocking manner or by registering a callback to be executed
* upon completion. For example:
*
*
*
* ICompletableFuture<Long> future = atomicLong.addAndGetAsync(13);
* future.andThen(new ExecutionCallback<Long>() {
* void onResponse(Long response) {
* // do something with the result
* }
*
* void onFailure(Throwable t) {
* // handle failure
* }
* });
*
*
*
* During a network partition event it is possible for the {@link IAtomicLong} to exist in each of the partitioned
* clusters or to not exist at all. Under these circumstances the values held in the {@link IAtomicLong} may diverge.
* Once the network partition heals, Hazelcast will use the value held in the largest cluster, in this case updates
* made to the {@link IAtomicLong} in the smaller clusters will be lost. Where the merging clusters are the same sizes
* a winner of the merge will be randomly chosen.
*
* Supports Quorum {@link com.hazelcast.config.QuorumConfig} since 3.10 in cluster versions 3.10 and higher.
*
* @see IAtomicReference
*/
public interface IAtomicLong extends DistributedObject {
/**
* Returns the name of this IAtomicLong instance.
*
* @return the name of this IAtomicLong instance
*/
String getName();
/**
* Atomically adds the given value to the current value.
*
* @param delta the value to add to the current value
* @return the updated value, the given value added to the current value
*/
long addAndGet(long delta);
/**
* Atomically sets the value to the given updated value
* only if the current value {@code ==} the expected value.
*
* @param expect the expected value
* @param update the new value
* @return true if successful; or false if the actual value
* was not equal to the expected value.
*/
boolean compareAndSet(long expect, long update);
/**
* Atomically decrements the current value by one.
*
* @return the updated value, the current value decremented by one
*/
long decrementAndGet();
/**
* Gets the current value.
*
* @return the current value
*/
long get();
/**
* Atomically adds the given value to the current value.
*
* @param delta the value to add to the current value
* @return the old value before the add
*/
long getAndAdd(long delta);
/**
* Atomically sets the given value and returns the old value.
*
* @param newValue the new value
* @return the old value
*/
long getAndSet(long newValue);
/**
* Atomically increments the current value by one.
*
* @return the updated value, the current value incremented by one
*/
long incrementAndGet();
/**
* Atomically increments the current value by one.
*
* @return the old value
*/
long getAndIncrement();
/**
* Atomically sets the given value.
*
* @param newValue the new value
*/
void set(long newValue);
/**
* Alters the currently stored value by applying a function on it.
*
* @param function the function applied to the currently stored value
* @throws IllegalArgumentException if function is null.
* @since 3.2
*/
void alter(IFunction function);
/**
* Alters the currently stored value by applying a function on it and gets the result.
*
* @param function the function applied to the currently stored value
* @return the new value.
* @throws IllegalArgumentException if function is null.
* @since 3.2
*/
long alterAndGet(IFunction function);
/**
* Alters the currently stored value by applying a function on it on and gets the old value.
*
* @param function the function applied to the currently stored value
* @return the old value
* @throws IllegalArgumentException if function is null.
* @since 3.2
*/
long getAndAlter(IFunction function);
/**
* Applies a function on the value, the actual stored value will not change.
*
* @param function the function applied to the value, the value is not changed
* @return the result of the function application
* @throws IllegalArgumentException if function is null.
* @since 3.2
*/
R apply(IFunction function);
/**
* Atomically adds the given value to the current value.
* This method will dispatch a request and return immediately an {@link ICompletableFuture}.
* The operations result can be obtained in a blocking way, or a
* callback can be provided for execution upon completion, as demonstrated in the following examples:
*
*
* ICompletableFuture<Long> future = atomicLong.addAndGetAsync(13);
* // do something else, then read the result
* Long result = future.get(); // this method will block until the result is available
*
*
*
*
* ICompletableFuture<Long> future = atomicLong.addAndGetAsync(13);
* future.andThen(new ExecutionCallback<Long>() {
* void onResponse(Long response) {
* // do something with the result
* }
*
* void onFailure(Throwable t) {
* // handle failure
* }
* });
*
*
*
* @param delta the value to add
* @return an {@link ICompletableFuture} bearing the response
* @since 3.7
*/
ICompletableFuture addAndGetAsync(long delta);
/**
* Atomically sets the value to the given updated value
* only if the current value {@code ==} the expected value.
* This method will dispatch a request and return immediately an {@link ICompletableFuture}.
*
* @param expect the expected value
* @param update the new value
* @return an {@link ICompletableFuture} with value true if successful; or false if the actual value
* was not equal to the expected value.
* @since 3.7
*/
ICompletableFuture compareAndSetAsync(long expect, long update);
/**
* Atomically decrements the current value by one.
* This method will dispatch a request and return immediately an {@link ICompletableFuture}.
*
* @return an {@link ICompletableFuture} with the updated value.
* @since 3.7
*/
ICompletableFuture decrementAndGetAsync();
/**
* Gets the current value. This method will dispatch a request and return immediately an {@link ICompletableFuture}.
*
* @return an {@link ICompletableFuture} with the current value
* @since 3.7
*/
ICompletableFuture getAsync();
/**
* Atomically adds the given value to the current value.
* This method will dispatch a request and return immediately an {@link ICompletableFuture}.
*
* @param delta the value to add
* @return an {@link ICompletableFuture} with the old value before the addition
* @since 3.7
*/
ICompletableFuture getAndAddAsync(long delta);
/**
* Atomically sets the given value and returns the old value.
* This method will dispatch a request and return immediately an {@link ICompletableFuture}.
*
* @param newValue the new value
* @return an {@link ICompletableFuture} with the old value
* @since 3.7
*/
ICompletableFuture getAndSetAsync(long newValue);
/**
* Atomically increments the current value by one.
* This method will dispatch a request and return immediately an {@link ICompletableFuture}.
*
* @return an {@link ICompletableFuture} with the updated value
* @since 3.7
*/
ICompletableFuture incrementAndGetAsync();
/**
* Atomically increments the current value by one.
* This method will dispatch a request and return immediately an {@link ICompletableFuture}.
*
* @return an {@link ICompletableFuture} with the old value
* @since 3.7
*/
ICompletableFuture getAndIncrementAsync();
/**
* Atomically sets the given value.
* This method will dispatch a request and return immediately an {@link ICompletableFuture}.
*
* @param newValue the new value
* @return an {@link ICompletableFuture} API consumers can use to track execution of this request
* @since 3.7
*/
ICompletableFuture setAsync(long newValue);
/**
* Alters the currently stored value by applying a function on it.
* This method will dispatch a request and return immediately an {@link ICompletableFuture}.
*
* @param function the function
* @throws IllegalArgumentException if function is null.
* @return an {@link ICompletableFuture} API consumers can use to track execution of this request
* @since 3.7
*/
ICompletableFuture alterAsync(IFunction function);
/**
* Alters the currently stored value by applying a function on it and gets the result.
* This method will dispatch a request and return immediately an {@link ICompletableFuture}.
*
* @param function the function
* @return an {@link ICompletableFuture} with the new value.
* @throws IllegalArgumentException if function is null.
* @since 3.7
*/
ICompletableFuture alterAndGetAsync(IFunction function);
/**
* Alters the currently stored value by applying a function on it on and gets the old value.
* This method will dispatch a request and return immediately an {@link ICompletableFuture}.
*
* @param function the function
* @return an {@link ICompletableFuture} with the old value
* @throws IllegalArgumentException if function is null.
* @since 3.7
*/
ICompletableFuture getAndAlterAsync(IFunction function);
/**
* Applies a function on the value, the actual stored value will not change.
* This method will dispatch a request and return immediately an {@link ICompletableFuture}.
* Example:
*
*
* class IsOneFunction implements IFunction<Long, Boolean> {
* @Override
* public Boolean apply(Long input) {
* return input.equals(1L);
* }
* }
*
* ICompletableFuture future = atomicLong.applyAsync(new IsOneFunction());
* future.andThen(new ExecutionCallback<Boolean>() {
* void onResponse(Boolean response) {
* // do something with the response
* }
*
* void onFailure(Throwable t) {
* // handle failure
* }
* });
*
*
*
* @param function the function
* @return an {@link ICompletableFuture} with the result of the function application
* @throws IllegalArgumentException if function is null.
* @since 3.7
*/
ICompletableFuture applyAsync(IFunction function);
}