io.vertx.core.shareddata.impl

Class AsynchronousCounter

java.lang.Object

io.vertx.core.shareddata.impl.AsynchronousCounter

All Implemented Interfaces:

Counter

public class AsynchronousCounter
extends Object
implements Counter

Author:

Tim Fox

Constructor Summary

Constructors

Constructor and Description
AsynchronousCounter(VertxInternal vertx)
AsynchronousCounter(VertxInternal vertx, AtomicLong counter)

Method Summary

Modifier and Type	Method and Description
void	addAndGet(long value, Handler<AsyncResult<Long>> resultHandler) Add the value to the counter atomically and return the new count
void	compareAndSet(long expected, long value, Handler<AsyncResult<Boolean>> resultHandler) Set the counter to the specified value only if the current value is the expectec value.
void	decrementAndGet(Handler<AsyncResult<Long>> resultHandler) Decrement the counter atomically and return the new count
void	get(Handler<AsyncResult<Long>> resultHandler) Get the current value of the counter
void	getAndAdd(long value, Handler<AsyncResult<Long>> resultHandler) Add the value to the counter atomically and return the value before the add
void	getAndIncrement(Handler<AsyncResult<Long>> resultHandler) Increment the counter atomically and return the value before the increment.
void	incrementAndGet(Handler<AsyncResult<Long>> resultHandler) Increment the counter atomically and return the new count

Methods inherited from class java.lang.Object

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

Constructor Detail

AsynchronousCounter

public AsynchronousCounter(VertxInternal vertx)

AsynchronousCounter

public AsynchronousCounter(VertxInternal vertx,
                           AtomicLong counter)

Method Detail

get

public void get(Handler<AsyncResult<Long>> resultHandler)

Description copied from interface: Counter

Get the current value of the counter

Specified by:

get in interface Counter

Parameters:

resultHandler - handler which will be passed the value

incrementAndGet

public void incrementAndGet(Handler<AsyncResult<Long>> resultHandler)

Description copied from interface: Counter

Increment the counter atomically and return the new count

Specified by:

incrementAndGet in interface Counter

Parameters:

resultHandler - handler which will be passed the value

getAndIncrement

public void getAndIncrement(Handler<AsyncResult<Long>> resultHandler)

Description copied from interface: Counter

Increment the counter atomically and return the value before the increment.

Specified by:

getAndIncrement in interface Counter

Parameters:

resultHandler - handler which will be passed the value

decrementAndGet

public void decrementAndGet(Handler<AsyncResult<Long>> resultHandler)

Description copied from interface: Counter

Decrement the counter atomically and return the new count

Specified by:

decrementAndGet in interface Counter

Parameters:

resultHandler - handler which will be passed the value

addAndGet

public void addAndGet(long value,
                      Handler<AsyncResult<Long>> resultHandler)

Description copied from interface: Counter

Add the value to the counter atomically and return the new count

Specified by:

addAndGet in interface Counter

Parameters:

value - the value to add

resultHandler - handler which will be passed the value

getAndAdd

public void getAndAdd(long value,
                      Handler<AsyncResult<Long>> resultHandler)

Description copied from interface: Counter

Add the value to the counter atomically and return the value before the add

Specified by:

getAndAdd in interface Counter

Parameters:

value - the value to add

resultHandler - handler which will be passed the value

compareAndSet

public void compareAndSet(long expected,
                          long value,
                          Handler<AsyncResult<Boolean>> resultHandler)

Description copied from interface: Counter

Set the counter to the specified value only if the current value is the expectec value. This happens atomically.

Specified by:

compareAndSet in interface Counter

Parameters:

expected - the expected value

value - the new value

resultHandler - the handler will be passed true on success