DefaultUidGenerator (gw-snowflake 2.0.3 API)

java.lang.Object
- io.geewit.snowflake.impl.DefaultUidGenerator

所有已实现的接口:

UidGenerator

直接已知子类:

CachedUidGenerator
```
public class DefaultUidGenerator
extends java.lang.Object
implements UidGenerator
```
Represents an implementation of UidGenerator
The unique id has 64bits (long), default allocated as blow:
sign: The highest bit is 0
delta seconds: The next 28 bits, represents delta seconds since a customer epoch(2016-05-20 00:00:00.000). Supports about 8.7 years until to 2024-11-20 21:24:16
worker id: The next 22 bits, represents the worker's id which assigns based on database, max id is about 420W

sequence: The next 13 bits, represents a sequence within the same second, max for 8192/s

The parseUID(long) is a tool method to parse the bits


 +------+----------------------+----------------+-----------+
 | sign |     delta seconds    | worker node id | sequence  |
 +------+----------------------+----------------+-----------+
   1bit          28bits              22bits         13bits

You can also specified the bits by Spring property setting.

timeBits: default as 28
workerBits: default as 22
seqBits: default as 13
epochStr: Epoch date string format 'yyyy-MM-dd'. Default as '2016-05-20'
Note that: The total bits must be 64 -1

字段概要

字段
限定符和类型	字段和说明
`protected BitsAllocator`	`bitsAllocator` Stable fields after spring bean initializing
`protected long`	`epochSeconds`
`protected java.lang.String`	`epochStr` Customer epoch, unit as second.
`protected long`	`lastSecond`
`protected int`	`seqBits`
`protected long`	`sequence` Volatile fields caused by nextId()
`protected int`	`timeBits` Bits allocate
`protected int`	`workerBits`
`protected long`	`workerId`

构造器概要

构造器
构造器和说明

DefaultUidGenerator(long workerId)

构造器
构造器和说明
`DefaultUidGenerator(long workerId)`

方法概要

所有方法实例方法具体方法
限定符和类型	方法和说明
`long`	`getUID()` Get a unique ID
`protected long`	`nextId()` Get UID
`java.lang.String`	`parseUID(long uid)` Parse the UID into elements which are used to generate the UID.
`void`	`setEpochStr(java.lang.String epochStr)`
`void`	`setSeqBits(int seqBits)`
`void`	`setTimeBits(int timeBits)`
`void`	`setWorkerBits(int workerBits)`

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - timeBits
```
protected int timeBits
```
    Bits allocate
  - workerBits
```
protected int workerBits
```
  - seqBits
```
protected int seqBits
```
  - epochStr
```
protected java.lang.String epochStr
```
    Customer epoch, unit as second. For example 2016-05-20 (ms: 1463673600000)
  - epochSeconds
```
protected long epochSeconds
```
  - bitsAllocator
```
protected BitsAllocator bitsAllocator
```
    Stable fields after spring bean initializing
  - workerId
```
protected long workerId
```
  - sequence
```
protected long sequence
```
    Volatile fields caused by nextId()
  - lastSecond
```
protected long lastSecond
```
- 构造器详细资料
  - DefaultUidGenerator
```
public DefaultUidGenerator(long workerId)
```
- 方法详细资料
  - getUID
```
public long getUID()
            throws UidGenerateException
```
    从接口复制的说明: UidGenerator
    
    Get a unique ID
    
    指定者:
    
    getUID 在接口中 UidGenerator
    
    返回:
    
    UID
    
    抛出:
    
    UidGenerateException
  - parseUID
```
public java.lang.String parseUID(long uid)
```
    从接口复制的说明: UidGenerator
    
    Parse the UID into elements which are used to generate the UID.
    Such as timestamp & workerId & sequence...
    
    指定者:
    
    parseUID 在接口中 UidGenerator
    
    返回:
    
    Parsed info
  - nextId
```
protected long nextId()
```
    Get UID
    
    返回:
    
    UID
    
    抛出:
    
    UidGenerateException - in the case: Clock moved backwards; Exceeds the max timestamp
  - setTimeBits
```
public void setTimeBits(int timeBits)
```
  - setWorkerBits
```
public void setWorkerBits(int workerBits)
```
  - setSeqBits
```
public void setSeqBits(int seqBits)
```
  - setEpochStr
```
public void setEpochStr(java.lang.String epochStr)
```

类 DefaultUidGenerator

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

timeBits

workerBits

seqBits

epochStr

epochSeconds

bitsAllocator

workerId

sequence

lastSecond

构造器详细资料

DefaultUidGenerator

方法详细资料

getUID

parseUID

nextId

setTimeBits

setWorkerBits

setSeqBits

setEpochStr