Sequence (tracer-core 2.1.4 API)

java.lang.Object
- com.alipay.disruptor.Sequence

直接已知子类:

FixedSequenceGroup, SequenceGroup
```
public class Sequence
extends Object
```
Concurrent sequence class used for tracking the progress of the ring buffer and event processors. Support a number of concurrent operations including CAS and order writes.
Also attempts to be more efficient with regards to false sharing by adding padding around the volatile field.

字段概要

字段
限定符和类型	字段和说明
`protected long`	`p1`
`protected long`	`p10`
`protected long`	`p11`
`protected long`	`p12`
`protected long`	`p13`
`protected long`	`p14`
`protected long`	`p15`
`protected long`	`p2`
`protected long`	`p3`
`protected long`	`p4`
`protected long`	`p5`
`protected long`	`p6`
`protected long`	`p7`
`protected long`	`p9`
`protected long`	`value`

构造器概要

构造器
构造器和说明

Sequence()
Create a sequence initialised to -1.

Sequence(long initialValue)
Create a sequence with a specified initial value.

构造器
构造器和说明
`Sequence()` Create a sequence initialised to -1.
`Sequence(long initialValue)` Create a sequence with a specified initial value.

方法概要

方法
限定符和类型	方法和说明
`long`	`addAndGet(long increment)` Atomically add the supplied value.
`boolean`	`compareAndSet(long expectedValue, long newValue)` Perform a compare and set operation on the sequence.
`long`	`get()` Perform a volatile read of this sequence's value.
`long`	`incrementAndGet()` Atomically increment the sequence by one.
`void`	`set(long value)` Perform an ordered write of this sequence.
`void`	`setVolatile(long value)` Performs a volatile write of this sequence.
`String`	`toString()`

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

- 字段详细资料
  - p9
```
protected long p9
```
  - p10
```
protected long p10
```
  - p11
```
protected long p11
```
  - p12
```
protected long p12
```
  - p13
```
protected long p13
```
  - p14
```
protected long p14
```
  - p15
```
protected long p15
```
  - value
```
protected volatile long value
```
  - p1
```
protected long p1
```
  - p2
```
protected long p2
```
  - p3
```
protected long p3
```
  - p4
```
protected long p4
```
  - p5
```
protected long p5
```
  - p6
```
protected long p6
```
  - p7
```
protected long p7
```
- 构造器详细资料
  - Sequence
```
public Sequence()
```
    Create a sequence initialised to -1.
  - Sequence
```
public Sequence(long initialValue)
```
    Create a sequence with a specified initial value.
    
    参数:
    initialValue - The initial value for this sequence.
- 方法详细资料
  - get
```
public long get()
```
    Perform a volatile read of this sequence's value.
    
    返回:
    The current value of the sequence.
  - set
```
public void set(long value)
```
    Perform an ordered write of this sequence. The intent is a Store/Store barrier between this write and any previous store.
    
    参数:
    value - The new value for the sequence.
  - setVolatile
```
public void setVolatile(long value)
```
    Performs a volatile write of this sequence. The intent is a Store/Store barrier between this write and any previous write and a Store/Load barrier between this write and any subsequent volatile read.
    
    参数:
    value - The new value for the sequence.
  - compareAndSet
```
public boolean compareAndSet(long expectedValue,
                    long newValue)
```
    Perform a compare and set operation on the sequence.
    
    参数:
    expectedValue - The expected current value.
    newValue - The value to update to.
    
    返回:
    true if the operation succeeds, false otherwise.
  - incrementAndGet
```
public long incrementAndGet()
```
    Atomically increment the sequence by one.
    
    返回:
    The value after the increment
  - addAndGet
```
public long addAndGet(long increment)
```
    Atomically add the supplied value.
    
    参数:
    increment - The value to add to the sequence.
    
    返回:
    The value after the increment.
  - toString
```
public String toString()
```
    覆盖:
    
    toString 在类中 Object

类 Sequence

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

p9

p10

p11

p12

p13

p14

p15

value

p1

p2

p3

p4

p5

p6

p7

构造器详细资料

Sequence

Sequence

方法详细资料

get

set

setVolatile

compareAndSet

incrementAndGet

addAndGet

toString