org.jboss.cache.commands.write
Class InvalidateCommand

java.lang.Object
  org.jboss.cache.commands.read.AbstractDataCommand
      org.jboss.cache.commands.write.InvalidateCommand

All Implemented Interfaces:

DataCommand, ReplicableCommand, VisitableCommand

Direct Known Subclasses:

VersionedInvalidateCommand

public class InvalidateCommand
extends AbstractDataCommand

Removes a node's content from memory - never removes the node. It also clenups data for resident nodes - which are not being touched by eviction.

Since:

2.2

Author:

Mircea.Markus@jboss.com

Field Summary

static int	METHOD_ID
protected Notifier	notifier
protected CacheSPI	spi

Fields inherited from class org.jboss.cache.commands.read.AbstractDataCommand

dataContainer, fqn

Constructor Summary

InvalidateCommand()

InvalidateCommand(Fqn fqn)

Method Summary

Object	acceptVisitor(InvocationContext ctx, Visitor visitor) Accept a visitor, and return the result of accepting this visitor.
protected NodeSPI	enforceNodeLoading() //TODO: 2.2.0: rather than using CacheSPI this should use peek().
int	getCommandId() Used by marshallers to convert this command into an id for streaming.
Object[]	getParameters() Basic versions of these methods
void	initialize(CacheSPI cacheSpi, DataContainer dataContainer, Notifier notifier)
protected void	invalidateNode(NodeSPI node) mark the node to be removed (and all children) as invalid so anyone holding a direct reference to it will be aware that it is no longer valid.
Object	perform(InvocationContext ctx) Performs an invalidation on a specified node
void	setParameters(int commandId, Object[] args) Basic versions of these methods
String	toString()

Methods inherited from class org.jboss.cache.commands.read.AbstractDataCommand

equals, getFqn, hashCode, initialize

Methods inherited from class java.lang.Object

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

Field Detail

METHOD_ID

public static final int METHOD_ID

See Also:

Constant Field Values

spi

protected CacheSPI spi

notifier

protected Notifier notifier

Constructor Detail

InvalidateCommand

public InvalidateCommand(Fqn fqn)

InvalidateCommand

public InvalidateCommand()

Method Detail

initialize

public void initialize(CacheSPI cacheSpi,
                       DataContainer dataContainer,
                       Notifier notifier)

perform

public Object perform(InvocationContext ctx)

Performs an invalidation on a specified node

Parameters:

ctx - invocation context

Returns:

null

enforceNodeLoading

protected NodeSPI enforceNodeLoading()

//TODO: 2.2.0: rather than using CacheSPI this should use peek(). The other interceptors should obtain locks and load nodes if necessary for this InvalidateCommand. //Even better - this can be handles in the interceptors before call interceptor

invalidateNode

protected void invalidateNode(NodeSPI node)

mark the node to be removed (and all children) as invalid so anyone holding a direct reference to it will be aware that it is no longer valid.

acceptVisitor

public Object acceptVisitor(InvocationContext ctx,
                            Visitor visitor)
                     throws Throwable

Description copied from interface: VisitableCommand

Accept a visitor, and return the result of accepting this visitor.

Parameters:

ctx - invocation context

visitor - visitor to accept

Returns:

arbitrary return value

Throws:

Throwable - in the event of problems

getCommandId

public int getCommandId()

Description copied from interface: ReplicableCommand

Used by marshallers to convert this command into an id for streaming.

Returns:

the method id of this command. This is compatible with pre-2.2.0 MethodCall ids.

toString

public String toString()

Overrides:

toString in class AbstractDataCommand

getParameters

public Object[] getParameters()

Description copied from class: AbstractDataCommand

Basic versions of these methods

Specified by:

getParameters in interface ReplicableCommand

Overrides:

getParameters in class AbstractDataCommand

Returns:

an object array of arguments, compatible with pre-2.2.0 MethodCall args.

setParameters

public void setParameters(int commandId,
                          Object[] args)

Description copied from class: AbstractDataCommand

Basic versions of these methods

Specified by:

setParameters in interface ReplicableCommand

Overrides:

setParameters in class AbstractDataCommand

Parameters:

commandId - command id to set. This is usually unused but *could* be used in the event of a command having multiple IDs, such as PutKeyValueCommand.

args - object array of args