org.lacibus.backingstore

Class FiledHighestIdentifier

java.lang.Object

org.lacibus.triplesource.HighestIdentifier

org.lacibus.backingstore.FiledHighestIdentifier

All Implemented Interfaces:

java.io.Serializable

public class FiledHighestIdentifier
extends HighestIdentifier

A highest identifier that can be safely restored after a restart because a safe value of it is stored in a filesystem

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
FiledHighestIdentifier(java.io.File directory, long source) Create a Filed Highest Identifier.

Method Summary

Modifier and Type	Method and Description
long	next() Increment the value Over-riding methods can throw exceptions
void	setIfHigher(long newValue) Set the value to the given value if this is higher than the current value.

Methods inherited from class org.lacibus.triplesource.HighestIdentifier

get

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FiledHighestIdentifier

public FiledHighestIdentifier(java.io.File directory,
                              long source)
                       throws SourceConnectorStateException,
                              SourceConnectorIOException

Create a Filed Highest Identifier. The value is set to the stored safe value.

Parameters:

directory - the filesystem directory in which safe values are stored.

Throws:

SourceConnectorIOException

SourceConnectorStateException

Method Detail

setIfHigher

public void setIfHigher(long newValue)
                 throws SourceConnectorStateException,
                        SourceConnectorIOException

Description copied from class: HighestIdentifier

Set the value to the given value if this is higher than the current value. Over-riding methods can throw exceptions

Overrides:

setIfHigher in class HighestIdentifier

Parameters:

newValue - the value to be set if it is higher than the current value

Throws:

SourceConnectorStateException

SourceConnectorIOException

next

public long next()
          throws SourceConnectorStateException,
                 SourceConnectorIOException

Description copied from class: HighestIdentifier

Increment the value Over-riding methods can throw exceptions

Overrides:

next in class HighestIdentifier

Returns:

the incremented value

Throws:

SourceConnectorStateException

SourceConnectorIOException