AbstractCheckpointAlgorithm

java.lang.Object
- javax.batch.api.chunk.AbstractCheckpointAlgorithm

All Implemented Interfaces:

CheckpointAlgorithm
```
public abstract class AbstractCheckpointAlgorithm
extends java.lang.Object
implements CheckpointAlgorithm
```
The AbstractCheckpointAlgorithm provides default implementations of less commonly implemented methods.

Constructor Summary

Constructors
Constructor and Description

AbstractCheckpointAlgorithm()

Constructors
Constructor and Description
`AbstractCheckpointAlgorithm()`

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`beginCheckpoint()` Override this method for the CheckpointAlgorithm to do something before a checkpoint interval begins (before the next chunk transaction begins).
`int`	`checkpointTimeout()` Override this method if the CheckpointAlgorithm establishes a checkpoint timeout.
`void`	`endCheckpoint()` Override this method for the CheckpointAlgorithm to do something after a checkpoint is taken (after the chunk transaction is committed).
`abstract boolean`	`isReadyToCheckpoint()` Implement logic in this method to decide if a checkpoint should be taken now.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - AbstractCheckpointAlgorithm
```
public AbstractCheckpointAlgorithm()
```
- Method Detail
  - checkpointTimeout
```
public int checkpointTimeout()
                      throws java.lang.Exception
```
    Override this method if the CheckpointAlgorithm establishes a checkpoint timeout. The default implementation returns 0, which means the maximum permissible timeout allowed by the runtime environment.
    
    Specified by:
    
    checkpointTimeout in interface CheckpointAlgorithm
    
    Returns:
    
    the timeout interval (expressed in seconds) to use for the next checkpoint interval
    
    Throws:
    
    java.lang.Exception - (or subclass) if an error occurs.
  - beginCheckpoint
```
public void beginCheckpoint()
                     throws java.lang.Exception
```
    Override this method for the CheckpointAlgorithm to do something before a checkpoint interval begins (before the next chunk transaction begins). The default implementation does nothing.
    
    Specified by:
    
    beginCheckpoint in interface CheckpointAlgorithm
    
    Throws:
    
    java.lang.Exception - (or subclass) if an error occurs.
  - isReadyToCheckpoint
```
public abstract boolean isReadyToCheckpoint()
                                     throws java.lang.Exception
```
    Implement logic in this method to decide if a checkpoint should be taken now.
    
    Specified by:
    
    isReadyToCheckpoint in interface CheckpointAlgorithm
    
    Returns:
    
    boolean indicating whether or not to checkpoint now.
    
    Throws:
    
    java.lang.Exception - (or subclass) if an error occurs.
  - endCheckpoint
```
public void endCheckpoint()
                   throws java.lang.Exception
```
    Override this method for the CheckpointAlgorithm to do something after a checkpoint is taken (after the chunk transaction is committed). The default implementation does nothing.
    
    Specified by:
    
    endCheckpoint in interface CheckpointAlgorithm
    
    Throws:
    
    java.lang.Exception - (or subclass) if an error occurs.

Class AbstractCheckpointAlgorithm

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

AbstractCheckpointAlgorithm

Method Detail

checkpointTimeout

beginCheckpoint

isReadyToCheckpoint

endCheckpoint