org.jboss.cache.commands.write
Class EvictCommand

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

All Implemented Interfaces:

DataCommand, ReplicableCommand, VisitableCommand

Direct Known Subclasses:

LegacyEvictCommand

public class EvictCommand
extends AbstractDataCommand

Implements functionality defined by Cache.evict(org.jboss.cache.Fqn)

Since:

2.2

Author:

Mircea.Markus@jboss.com

Field Summary

protected static org.apache.commons.logging.Log	log
static int	METHOD_ID
protected Notifier	notifier
protected static boolean	trace
static int	VERSIONED_METHOD_ID

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

dataContainer, fqn

Constructor Summary

EvictCommand()

EvictCommand(Fqn fqn)

Method Summary

Object	acceptVisitor(InvocationContext ctx, Visitor visitor) Accept a visitor, and return the result of accepting this visitor.
protected boolean	evictNode(Fqn fqn, InvocationContext ctx, NodeSPI node)
int	getCommandId() Used by marshallers to convert this command into an id for streaming.
List<Fqn>	getNodesToEvict()
Object[]	getParameters() Basic versions of these methods
protected Collection<Fqn>	getRecursiveEvictionNodes()
void	initialize(Notifier notifier, DataContainer dataContainer)
boolean	isRecursive()
protected NodeSPI	lookupForEviction(InvocationContext ctx, Fqn fqn)
Object	perform(InvocationContext ctx) Evicts a node.
void	rollback()
void	setNodesToEvict(List<Fqn> nodesToEvict)
void	setParameters(int commandId, Object[] args) Basic versions of these methods
void	setRecursive(boolean recursive)
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

VERSIONED_METHOD_ID

public static final int VERSIONED_METHOD_ID

See Also:

Constant Field Values

notifier

protected Notifier notifier

log

protected static final org.apache.commons.logging.Log log

trace

protected static final boolean trace

Constructor Detail

EvictCommand

public EvictCommand(Fqn fqn)

EvictCommand

public EvictCommand()

Method Detail

initialize

public void initialize(Notifier notifier,
                       DataContainer dataContainer)

getNodesToEvict

public List<Fqn> getNodesToEvict()

setNodesToEvict

public void setNodesToEvict(List<Fqn> nodesToEvict)

perform

public Object perform(InvocationContext ctx)

Evicts a node.

See EvictionInterceptor.visitEvictFqnCommand(org.jboss.cache.InvocationContext , EvictCommand) which is where the return value is used

Parameters:

ctx - invocation context

Returns:

true if the node is now absent from the cache. Returns false if the node still exists; i.e. was only data removed because it still has children.

getRecursiveEvictionNodes

protected Collection<Fqn> getRecursiveEvictionNodes()

evictNode

protected boolean evictNode(Fqn fqn,
                            InvocationContext ctx,
                            NodeSPI node)

lookupForEviction

protected NodeSPI lookupForEviction(InvocationContext ctx,
                                    Fqn fqn)

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.

isRecursive

public boolean isRecursive()

setRecursive

public void setRecursive(boolean recursive)

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

toString

public String toString()

Overrides:

toString in class AbstractDataCommand

rollback

public void rollback()