org.infinispan.commands.read

Class SizeCommand

java.lang.Object

org.infinispan.commands.AbstractLocalFlagAffectedCommand

org.infinispan.commands.read.AbstractLocalCommand

org.infinispan.commands.read.SizeCommand

All Implemented Interfaces:

LocalCommand, LocalFlagAffectedCommand, ReplicableCommand, VisitableCommand

public class SizeCommand
extends AbstractLocalCommand
implements VisitableCommand

Command to calculate the size of the cache

Since:

4.0

Author:

Manik Surtani (manik@jboss.org), Mircea.Markus@jboss.com, Trustin Lee

Field Summary

Fields inherited from class org.infinispan.commands.AbstractLocalFlagAffectedCommand

flags

Constructor Summary

Constructors

Constructor and Description
SizeCommand(Cache<Object,?> cache, Set<Flag> flags)

Method Summary

Modifier and Type	Method and Description
Object	acceptVisitor(InvocationContext ctx, Visitor visitor) Accept a visitor, and return the result of accepting this visitor.
Integer	perform(InvocationContext ctx) Performs the primary function of the command.
boolean	readsExistingValues()
String	toString()

Methods inherited from class org.infinispan.commands.read.AbstractLocalCommand

canBlock, getCommandId, ignoreCommandOnStatus, isReturnValueExpected, noTxModifications, readFrom, shouldInvoke, writeTo

Methods inherited from class org.infinispan.commands.AbstractLocalFlagAffectedCommand

getFlags, setFlags

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.infinispan.commands.VisitableCommand

alwaysReadsExistingValues, ignoreCommandOnStatus, shouldInvoke

Methods inherited from interface org.infinispan.commands.ReplicableCommand

canBlock, getCommandId, getParameters, isReturnValueExpected, readFrom, setParameters, writeTo

Methods inherited from interface org.infinispan.commands.LocalFlagAffectedCommand

addFlag, addFlags, hasFlag, setFlags

Constructor Detail

SizeCommand

public SizeCommand(Cache<Object,?> cache,
                   Set<Flag> flags)

Method Detail

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.

Specified by:

acceptVisitor in interface VisitableCommand

Parameters:

ctx - invocation context

visitor - visitor to accept

Returns:

arbitrary return value

Throws:

Throwable - in the event of problems

readsExistingValues

public boolean readsExistingValues()

Specified by:

readsExistingValues in interface VisitableCommand

Returns:

true if the command needs to read the previous values of the keys it acts on.

perform

public Integer perform(InvocationContext ctx)
                throws Throwable

Description copied from interface: ReplicableCommand

Performs the primary function of the command. Please see specific implementation classes for details on what is performed as well as return types. Important: this method will be invoked at the end of interceptors chain. It should never be called directly from a custom interceptor.

Specified by:

perform in interface ReplicableCommand

Parameters:

ctx - invocation context

Returns:

arbitrary return value generated by performing this command

Throws:

Throwable - in the event of problems.

toString

public String toString()

Overrides:

toString in class Object