Package org.redisson

Class RedissonCountDownLatch

java.lang.Object

org.redisson.RedissonObject

org.redisson.RedissonCountDownLatch

All Implemented Interfaces:

RCountDownLatch, RCountDownLatchAsync, RObject, RObjectAsync

public class RedissonCountDownLatch
extends RedissonObject
implements RCountDownLatch

Distributed alternative to the CountDownLatch It has a advantage over CountDownLatch -- count can be reset via trySetCount(long).

Author:

Nikita Koksharov

Field Summary

Fields inherited from class org.redisson.RedissonObject

codec, commandExecutor, name

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	RedissonCountDownLatch(CommandAsyncExecutor commandExecutor, String name)

Method Summary

Modifier and Type	Method	Description
void	await()	Waits until counter reach zero.
boolean	await(long time, TimeUnit unit)	Waits until counter reach zero or up to defined timeout.
RFuture<Void>	awaitAsync()	Waits until counter reach zero.
RFuture<Boolean>	awaitAsync(long waitTime, TimeUnit unit)	Waits until counter reach zero or up to defined timeout.
void	countDown()	Decrements the counter of the latch.
RFuture<Void>	countDownAsync()	Decrements the counter of the latch.
RFuture<Boolean>	deleteAsync()	Delete object in async mode
long	getCount()	Returns value of current count.
RFuture<Long>	getCountAsync()	Returns value of current count.
boolean	trySetCount(long count)	Sets new count value only if previous count already has reached zero or is not set at all.
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 class org.redisson.RedissonObject

addListener, addListener, addListener, addListenerAsync, addListenerAsync, addListenerAsync, addListenerId, addTrackingListener, addTrackingListenerAsync, checkNotBatch, copy, copy, copy, copyAndReplace, copyAndReplace, copyAndReplaceAsync, copyAndReplaceAsync, copyAsync, copyAsync, copyAsync, copyAsync, copyAsync, delete, deleteAsync, dump, dumpAsync, encode, encode, encode, encode, encodeMapKey, encodeMapKey, encodeMapKeys, encodeMapValue, encodeMapValues, get, getCodec, getIdleTime, getIdleTimeAsync, getListenerIdsByName, getLockByMapKey, getLockByValue, getName, getNameByListenerId, getRawName, getRawName, getServiceManager, getSubscribeService, isExists, isExistsAsync, map, mapName, migrate, migrateAsync, move, moveAsync, prefixName, removeListener, removeListener, removeListenerAsync, removeListenerAsync, removeListenerAsync, removeListenerId, removeListeners, removeTrackingListener, removeTrackingListenerAsync, rename, renameAsync, renameAsync, renameAsync, renamenx, renamenxAsync, renamenxAsync, renamenxAsync, restore, restore, restoreAndReplace, restoreAndReplace, restoreAndReplaceAsync, restoreAndReplaceAsync, restoreAsync, restoreAsync, setName, sizeInMemory, sizeInMemoryAsync, sizeInMemoryAsync, sizeInMemoryAsync, suffixName, toSeconds, toStream, touch, touchAsync, unlink, unlinkAsync

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.redisson.api.RObject

addListener, copy, copy, copy, copyAndReplace, copyAndReplace, delete, dump, getCodec, getIdleTime, getName, isExists, migrate, move, removeListener, rename, renamenx, restore, restore, restoreAndReplace, restoreAndReplace, sizeInMemory, touch, unlink

Methods inherited from interface org.redisson.api.RObjectAsync

addListenerAsync, copyAndReplaceAsync, copyAndReplaceAsync, copyAsync, copyAsync, copyAsync, dumpAsync, getIdleTimeAsync, isExistsAsync, migrateAsync, moveAsync, removeListenerAsync, renameAsync, renamenxAsync, restoreAndReplaceAsync, restoreAndReplaceAsync, restoreAsync, restoreAsync, sizeInMemoryAsync, touchAsync, unlinkAsync

Constructor Details

RedissonCountDownLatch

protected RedissonCountDownLatch(CommandAsyncExecutor commandExecutor,
 String name)

Method Details

await

public void await()
           throws InterruptedException

Description copied from interface: RCountDownLatch

Waits until counter reach zero.

Specified by:

await in interface RCountDownLatch

Throws:

InterruptedException - if the current thread was interrupted

awaitAsync

public RFuture<Void> awaitAsync()

Description copied from interface: RCountDownLatchAsync

Waits until counter reach zero.

Specified by:

awaitAsync in interface RCountDownLatchAsync

Returns:

void

await

public boolean await(long time,
 TimeUnit unit)
              throws InterruptedException

Description copied from interface: RCountDownLatch

Waits until counter reach zero or up to defined timeout.

Specified by:

await in interface RCountDownLatch

Parameters:

time - the maximum time to wait

unit - the time unit

Returns:

true if the count reached zero and false if timeout reached before the count reached zero

Throws:

InterruptedException - if the current thread was interrupted

awaitAsync

public RFuture<Boolean> awaitAsync(long waitTime,
 TimeUnit unit)

Description copied from interface: RCountDownLatchAsync

Waits until counter reach zero or up to defined timeout.

Specified by:

awaitAsync in interface RCountDownLatchAsync

Parameters:

waitTime - the maximum time to wait

unit - the time unit

Returns:

true if the count reached zero and false if timeout reached before the count reached zero

countDown

public void countDown()

Description copied from interface: RCountDownLatch

Decrements the counter of the latch. Notifies all waiting threads when count reaches zero.

Specified by:

countDown in interface RCountDownLatch

countDownAsync

public RFuture<Void> countDownAsync()

Description copied from interface: RCountDownLatchAsync

Decrements the counter of the latch. Notifies all waiting threads when count reaches zero.

Specified by:

countDownAsync in interface RCountDownLatchAsync

Returns:

void

getCount

public long getCount()

Description copied from interface: RCountDownLatch

Returns value of current count.

Specified by:

getCount in interface RCountDownLatch

Returns:

current count

getCountAsync

public RFuture<Long> getCountAsync()

Description copied from interface: RCountDownLatchAsync

Returns value of current count.

Specified by:

getCountAsync in interface RCountDownLatchAsync

Returns:

the current count

trySetCount

public boolean trySetCount(long count)

Description copied from interface: RCountDownLatch

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

Specified by:

trySetCount in interface RCountDownLatch

Parameters:

count - - number of times RCountDownLatch.countDown() must be invoked before threads can pass through RCountDownLatch.await()

Returns:

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

trySetCountAsync

public RFuture<Boolean> trySetCountAsync(long count)

Description copied from interface: RCountDownLatchAsync

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

Specified by:

trySetCountAsync in interface RCountDownLatchAsync

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

deleteAsync

public RFuture<Boolean> deleteAsync()

Description copied from interface: RObjectAsync

Delete object in async mode

Specified by:

deleteAsync in interface RObjectAsync

Overrides:

deleteAsync in class RedissonObject

Returns:

true if object was deleted false if not