icu.easyj.core.sequence.impls

Class AtomicLongSequenceServiceImpl

java.lang.Object

icu.easyj.core.sequence.impls.AtomicLongSequenceServiceImpl

All Implemented Interfaces:

ISequenceService

@LoadLevel(name="atomic-long",
           order=999)
public class AtomicLongSequenceServiceImpl
extends Object
implements ISequenceService

基于 AtomicLong 实现的内存序列服务

主要用途： 1）单机单应用运行时才能使用此序列服务。 2）运行单元测试时，用于模拟Mock序列服务。

特点：性能高。

使用说明：应用启动时，需要指定其初始值。

Author:

wangliang181230

Constructor Summary

Constructors

Constructor and Description
AtomicLongSequenceServiceImpl()
AtomicLongSequenceServiceImpl(long initialValue)

Method Summary

Modifier and Type	Method and Description
long	currVal(String seqName) 获取当前序列值
AtomicLong	getAtomicLong(String seqName)
long	nextVal(String seqName) 获取下一序列值
long	setVal(String seqName, long newVal) 设置序列值

Methods inherited from class java.lang.Object

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

Constructor Detail

AtomicLongSequenceServiceImpl

public AtomicLongSequenceServiceImpl(long initialValue)

AtomicLongSequenceServiceImpl

public AtomicLongSequenceServiceImpl()

Method Detail

currVal

public long currVal(@NonNull
                    String seqName)

Description copied from interface: ISequenceService

获取当前序列值

Specified by:

currVal in interface ISequenceService

Parameters:

seqName - 序列名

Returns:

当前序列值

nextVal

public long nextVal(@NonNull
                    String seqName)

Description copied from interface: ISequenceService

获取下一序列值

注意：实现类中不允许抛出 NotSupportedException，该方法是序列服务必须要支持的功能。

Specified by:

nextVal in interface ISequenceService

Parameters:

seqName - 序列名

Returns:

下一序列值

setVal

public long setVal(@NonNull
                   String seqName,
                   long newVal)

Description copied from interface: ISequenceService

设置序列值

Specified by:

setVal in interface ISequenceService

Parameters:

seqName - 序列名

newVal - 新的序列值

Returns:

previousVal 前序列值：null=没有序列值 | -1=未知

getAtomicLong

public AtomicLong getAtomicLong(String seqName)