Package org.datanucleus.state

Class StateManagerPool

java.lang.Object

org.datanucleus.state.StateManagerPool

public class StateManagerPool
extends java.lang.Object

Pool of StateManager objects. By default pool a maximum of 100 StateManager objects for reuse. Has an optional reaper thread that cleans out the unused pooled objects every 60 secs.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) class	StateManagerPool.CleanUpThread

Field Summary

Fields

Modifier and Type	Field	Description
private StateManagerPool.CleanUpThread	cleaner
private long	expirationTime
private long	maxIdle
private java.util.Map<DNStateManager,java.lang.Long>	recyclableSMs
private java.lang.Class<? extends DNStateManager>	smClass

Constructor Summary

Constructors

Constructor	Description
StateManagerPool(int maxIdle, boolean reaperThread, java.lang.Class<? extends DNStateManager> smClass)

Method Summary

Modifier and Type	Method	Description
void	checkIn(DNStateManager sm)
DNStateManager	checkOut(ExecutionContext ec, AbstractClassMetaData cmd)
void	cleanUp()
void	close()
protected DNStateManager	create(ExecutionContext ec, AbstractClassMetaData cmd)
void	expire(DNStateManager sm)
boolean	validate(DNStateManager sm)

Methods inherited from class java.lang.Object

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

Field Detail

maxIdle

private long maxIdle

expirationTime

private long expirationTime

recyclableSMs

private java.util.Map<DNStateManager,java.lang.Long> recyclableSMs

cleaner

private StateManagerPool.CleanUpThread cleaner

smClass

private java.lang.Class<? extends DNStateManager> smClass

Constructor Detail

StateManagerPool

public StateManagerPool(int maxIdle,
                        boolean reaperThread,
                        java.lang.Class<? extends DNStateManager> smClass)

Method Detail

close

public void close()

create

protected DNStateManager create(ExecutionContext ec,
                                AbstractClassMetaData cmd)

validate

public boolean validate(DNStateManager sm)

expire

public void expire(DNStateManager sm)

checkOut

public DNStateManager checkOut(ExecutionContext ec,
                               AbstractClassMetaData cmd)

cleanUp

public void cleanUp()

checkIn

public void checkIn(DNStateManager sm)