org.redisson.api

Interface RCountDownLatchAsync

All Superinterfaces:

RObjectAsync

All Known Subinterfaces:

RCountDownLatch

All Known Implementing Classes:

RedissonCountDownLatch

public interface RCountDownLatchAsync
extends RObjectAsync

Distributed alternative to the CountDownLatch It has an advantage over CountDownLatch -- count can be set via trySetCountAsync(long) method.

Author:

Nikita Koksharov

Method Summary

Modifier and Type	Method and Description
RFuture<Void>	countDownAsync() Decrements the count of the latch, releasing all waiting threads if the count reaches zero.
RFuture<Long>	getCountAsync() Returns the current count.
RFuture<Boolean>	trySetCountAsync(long count) Sets new count value only if previous count already has reached zero or is not set at all.

Methods inherited from interface org.redisson.api.RObjectAsync

copyAsync, deleteAsync, isExistsAsync, migrateAsync, moveAsync, renameAsync, renamenxAsync, touchAsync, unlinkAsync

Method Detail

countDownAsync

RFuture<Void> countDownAsync()

Decrements the count of the latch, releasing all waiting threads if the count reaches zero.

If the current count is greater than zero then it is decremented. If the new count is zero then all waiting threads are re-enabled for thread scheduling purposes.

If the current count equals zero then nothing happens.

Returns:

void

getCountAsync

RFuture<Long> getCountAsync()

Returns the current count.

This method is typically used for debugging and testing purposes.

Returns:

the current count

trySetCountAsync

RFuture<Boolean> trySetCountAsync(long count)

Sets new count value only if previous count already has reached zero or is not set at all.

Parameters:

count - - number of times countDown must be invoked before threads can pass through await

Returns:

true if new count setted false if previous count has not reached zero