Package io.vertx.core.shareddata
Interface Counter
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public interface CounterAn asynchronous counter that can be used to across the cluster to maintain a consistent count.- Author:
- Tim Fox
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description Future<Long>addAndGet(long value)Add the value to the counter atomically and return the new countFuture<Boolean>compareAndSet(long expected, long value)Set the counter to the specified value only if the current value is the expectec value.Future<Long>decrementAndGet()Decrement the counter atomically and return the new countFuture<Long>get()Get the current value of the counterFuture<Long>getAndAdd(long value)Add the value to the counter atomically and return the value before the addFuture<Long>getAndIncrement()Increment the counter atomically and return the value before the increment.Future<Long>incrementAndGet()Increment the counter atomically and return the new count
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Method Detail
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get
Future<Long> get()
Get the current value of the counter- Returns:
- a future notified with the value
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incrementAndGet
Future<Long> incrementAndGet()
Increment the counter atomically and return the new count- Returns:
- a future notified with the value
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getAndIncrement
Future<Long> getAndIncrement()
Increment the counter atomically and return the value before the increment.- Returns:
- a future notified with the value
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decrementAndGet
Future<Long> decrementAndGet()
Decrement the counter atomically and return the new count- Returns:
- a future notified with the value
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addAndGet
Future<Long> addAndGet(long value)
Add the value to the counter atomically and return the new count- Parameters:
value- the value to add- Returns:
- a future notified with the value
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getAndAdd
Future<Long> getAndAdd(long value)
Add the value to the counter atomically and return the value before the add- Parameters:
value- the value to add- Returns:
- a future notified with the value
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