com.goldencode.p2j.persist

Class ChangeBroker.ContextContainer

java.lang.Object

com.goldencode.p2j.security.ContextKey

com.goldencode.p2j.security.ContextLocal<ChangeBroker>

com.goldencode.p2j.persist.ChangeBroker.ContextContainer

All Implemented Interfaces:

WeightedToken

Enclosing class:

ChangeBroker

static class ChangeBroker.ContextContainer
extends ContextLocal<ChangeBroker>

Convenient implementation that allows the local context to be lazily initialized. The change broker depends on the buffer manager, so does the buffer manager depend on the change broker. To avoid infinite recursion, the change broker opts to be lazily initialized.

Field Summary

Fields inherited from class com.goldencode.p2j.security.ContextKey

HEADLESS_KEY

Constructor Summary

Constructors

Constructor and Description
ContextContainer()

Method Summary

Modifier and Type	Method and Description
WeightFactor	getWeight() Get the weight of this context-local var.
protected ChangeBroker	initialValue() Return null rather than providing a true initial value; initial value is instead lazily created in obtain().
ChangeBroker	obtain() Obtains the context-local instance of the contained global work area.

Methods inherited from class com.goldencode.p2j.security.ContextLocal

cleanup, clearInstance, dumpDependencies, get, get, isResetAllowed, set, setDebug

Methods inherited from class com.goldencode.p2j.security.ContextKey

equals, hashCode

Methods inherited from class java.lang.Object

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

Constructor Detail

ContextContainer

ContextContainer()

Method Detail

getWeight

public WeightFactor getWeight()

Get the weight of this context-local var.

Specified by:

getWeight in interface WeightedToken

Overrides:

getWeight in class ContextLocal<ChangeBroker>

Returns:

Always WeightFactor.LEVEL_6.

obtain

public ChangeBroker obtain()

Obtains the context-local instance of the contained global work area. The first time this method is invoked in a context, a new ChangeBroker instance is lazily created.

Returns:

The change broker associated with this context.

initialValue

protected ChangeBroker initialValue()

Return null rather than providing a true initial value; initial value is instead lazily created in obtain().

Overrides:

initialValue in class ContextLocal<ChangeBroker>

Returns:

null.