io.github.bucket4j.distributed.proxy.generic.compare_and_swap

Interface CompareAndSwapOperation

public interface CompareAndSwapOperation

Method Summary

Modifier and Type	Method and Description
boolean	compareAndSwap(byte[] originalData, byte[] newData, RemoteBucketState newState) Compares and swap data associated with key
Optional<byte[]>	getStateData() Reads data if it exists

Method Detail

getStateData

Optional<byte[]> getStateData()

Reads data if it exists

Returns:

persisted data or empty optional if data not exists

compareAndSwap

boolean compareAndSwap(byte[] originalData,
                       byte[] newData,
                       RemoteBucketState newState)

Compares and swap data associated with key

Parameters:

originalData - previous bucket state(can be null).

newData - new bucket state

newState - new state of bucket - can be used to extract additional data is useful for persistence or logging.

Returns:

true if data changed, false if another parallel transaction achieved success instead of current transaction