SnowFlowerIdGenerator (nacos-core 2.1.2.GA 2.1.2.GA API)

java.lang.Object
- com.alibaba.nacos.core.distributed.id.SnowFlowerIdGenerator

所有已实现的接口:

IdGenerator
```
public class SnowFlowerIdGenerator
extends java.lang.Object
implements IdGenerator
```
copy from http://www.cluozy.com/home/hexo/2018/08/11/shariding-JDBC-snowflake/. WorkerId generation policy: Calculate the InetAddress hashcode
The repeat rate of the dataCenterId, the value of the maximum dataCenterId times the time of each Raft election. The time for raft to select the master is generally measured in seconds. If the interval of an election is 5 seconds, it will take 150 seconds for the DataCenterId to be repeated. This is still based on the situation that the new master needs to be selected after each election of the Leader

作者:

liaochuntao

字段概要

字段
限定符和类型	字段和说明
`private long`	`currentId`
`private static java.lang.String`	`DATETIME_PATTERN`
`static long`	`EPOCH` Start time intercept (2018-08-05 08:34)
`private long`	`lastTime`
`private static org.slf4j.Logger`	`logger`
`private long`	`monotonicStartTime`
`private long`	`sequence`
`private static long`	`SEQUENCE_BITS`
`private static long`	`SEQUENCE_MASK`
`private long`	`startWallTime`
`private static long`	`TIMESTAMP_LEFT_SHIFT_BITS`
`private static long`	`WORKER_ID_BITS`
`private static long`	`WORKER_ID_LEFT_SHIFT_BITS`
`private static long`	`WORKER_ID_MAX_VALUE`
`private long`	`workerId`

构造器概要

构造器
构造器和说明

SnowFlowerIdGenerator()

构造器
构造器和说明
`SnowFlowerIdGenerator()`

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`	`currentId()`
`private long`	`currentTimeMillis()`
`java.util.Map<java.lang.Object,java.lang.Object>`	`info()`
`void`	`init()`
`void`	`initialize(long workerId)` init
`long`	`nextId()`
`private long`	`waitUntilNextTime(long lastTimestamp)` Block to the next millisecond until a new timestamp is obtained
`long`	`workerId()`

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
  - DATETIME_PATTERN
```
private static final java.lang.String DATETIME_PATTERN
```
    另请参阅:
    
    常量字段值
  - EPOCH
```
public static final long EPOCH
```
    Start time intercept (2018-08-05 08:34)
    
    另请参阅:
    
    常量字段值
  - logger
```
private static final org.slf4j.Logger logger
```
  - SEQUENCE_BITS
```
private static final long SEQUENCE_BITS
```
    另请参阅:
    
    常量字段值
  - WORKER_ID_BITS
```
private static final long WORKER_ID_BITS
```
    另请参阅:
    
    常量字段值
  - SEQUENCE_MASK
```
private static final long SEQUENCE_MASK
```
    另请参阅:
    
    常量字段值
  - WORKER_ID_LEFT_SHIFT_BITS
```
private static final long WORKER_ID_LEFT_SHIFT_BITS
```
    另请参阅:
    
    常量字段值
  - TIMESTAMP_LEFT_SHIFT_BITS
```
private static final long TIMESTAMP_LEFT_SHIFT_BITS
```
    另请参阅:
    
    常量字段值
  - WORKER_ID_MAX_VALUE
```
private static final long WORKER_ID_MAX_VALUE
```
    另请参阅:
    
    常量字段值
  - startWallTime
```
private final long startWallTime
```
  - monotonicStartTime
```
private final long monotonicStartTime
```
  - workerId
```
private long workerId
```
  - sequence
```
private long sequence
```
  - lastTime
```
private long lastTime
```
  - currentId
```
private long currentId
```
- 构造器详细资料
  - SnowFlowerIdGenerator
```
public SnowFlowerIdGenerator()
```
- 方法详细资料
  - init
```
public void init()
```
    指定者:
    
    init 在接口中 IdGenerator
  - currentId
```
public long currentId()
```
    指定者:
    
    currentId 在接口中 IdGenerator
  - workerId
```
public long workerId()
```
    指定者:
    
    workerId 在接口中 IdGenerator
  - nextId
```
public long nextId()
```
    指定者:
    
    nextId 在接口中 IdGenerator
  - info
```
public java.util.Map<java.lang.Object,java.lang.Object> info()
```
    指定者:
    
    info 在接口中 IdGenerator
  - initialize
```
public void initialize(long workerId)
```
    init
    
    参数:
    
    workerId - worker id (0~1024)
  - waitUntilNextTime
```
private long waitUntilNextTime(long lastTimestamp)
```
    Block to the next millisecond until a new timestamp is obtained
    
    参数:
    
    lastTimestamp - The time intercept of the last ID generated
    
    返回:
    
    Current timestamp
  - currentTimeMillis
```
private long currentTimeMillis()
```

类 SnowFlowerIdGenerator

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

DATETIME_PATTERN

EPOCH

logger

SEQUENCE_BITS

WORKER_ID_BITS

SEQUENCE_MASK

WORKER_ID_LEFT_SHIFT_BITS

TIMESTAMP_LEFT_SHIFT_BITS

WORKER_ID_MAX_VALUE

startWallTime

monotonicStartTime

workerId

sequence

lastTime

currentId

构造器详细资料

SnowFlowerIdGenerator

方法详细资料

init

currentId

workerId

nextId

info

initialize

waitUntilNextTime

currentTimeMillis