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Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
/**
* Copyright (c) 2013-2024 Nikita Koksharov
*
* 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 org.redisson.api;
import java.util.concurrent.TimeUnit;
/**
* Redis based implementation of {@link java.util.concurrent.CountDownLatch}
*
* It has an advantage over {@link java.util.concurrent.CountDownLatch} --
* count can be set via {@link #trySetCount} method.
*
* @author Nikita Koksharov
*
*/
public interface RCountDownLatch extends RObject, RCountDownLatchAsync {
/**
* Waits until counter reach zero.
*
* @throws InterruptedException if the current thread was interrupted
*/
void await() throws InterruptedException;
/**
* Waits until counter reach zero or up to defined timeout
.
*
* @param timeout the maximum time to wait
* @param unit the time unit
* @return true
if the count reached zero and false
* if timeout reached before the count reached zero
* @throws InterruptedException if the current thread was interrupted
*/
boolean await(long timeout, TimeUnit unit) throws InterruptedException;
/**
* Decrements the counter of the latch.
* Notifies all waiting threads when count reaches zero.
*/
void countDown();
/**
* Returns value of current count.
*
* @return current count
*/
long getCount();
/**
* Sets new count value only if previous count already has reached zero
* or is not set at all.
*
* @param count - number of times {@link #countDown} must be invoked
* before threads can pass through {@link #await}
* @return true
if new count setted
* false
if previous count has not reached zero
*/
boolean trySetCount(long count);
}
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