Sequencing (EclipseLink Core 3.0.4-RC1 API)

All Known Subinterfaces:

SequencingServer
```
public interface Sequencing
```
Purpose: Define interface to use sequencing.
Description: This interface accessed through Session.getSequencing() method. Used by EclipseLink internals to obtain sequencing values.
Responsibilities:
- Provides sequencing objects and supporting APIs.

Field Summary

Fields
Modifier and Type Field Description

static int AFTER_INSERT

static int BEFORE_INSERT

static int UNDEFINED

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Object`	`getNextValue(Class cls)`	INTERNAL: Return the newly-generated sequencing value.
`int`	`whenShouldAcquireValueForAll()`	INTERNAL: Indicates when sequencing value should be acquired for all classes.

- Field Detail
  - BEFORE_INSERT
```
static final int BEFORE_INSERT
```
    See Also:
    
    Constant Field Values
  - UNDEFINED
```
static final int UNDEFINED
```
    See Also:
    
    Constant Field Values
  - AFTER_INSERT
```
static final int AFTER_INSERT
```
    See Also:
    
    Constant Field Values
- Method Detail
  - whenShouldAcquireValueForAll
```
int whenShouldAcquireValueForAll()
```
    INTERNAL: Indicates when sequencing value should be acquired for all classes. There are just three possible return values: BEFORE_INSERT, UNDEFINED, AFTER_INSERT. Used as a shortcut to avoid individual checks for each class: shouldAcquireValueAfterInsert(Class cls). Currently UNDEFINED only happens in a case of a SessionBroker: session1 - BEFORE_INSERT, session2 - AFTER_INSERT
  - getNextValue
```
Object getNextValue(Class cls)
```
    INTERNAL: Return the newly-generated sequencing value.
    
    Parameters:
    
    cls - Class for which the sequencing value is generated.