org.infinispan.commands.read
Class GetKeyValueCommand

java.lang.Object
  org.infinispan.commands.AbstractFlagAffectedCommand
      org.infinispan.commands.read.AbstractDataCommand
          org.infinispan.commands.read.GetKeyValueCommand

All Implemented Interfaces:

DataCommand, FlagAffectedCommand, ReplicableCommand, VisitableCommand

public class GetKeyValueCommand
extends AbstractDataCommand

Implements functionality defined by Map.get(Object) and Map.containsKey(Object) operations

Since:

4.0

Author:

Manik Surtani (manik@jboss.org)

Field Summary

static byte

COMMAND_ID

Fields inherited from class org.infinispan.commands.read.AbstractDataCommand

key

Fields inherited from class org.infinispan.commands.AbstractFlagAffectedCommand

flags

Constructor Summary

GetKeyValueCommand()

GetKeyValueCommand(Object key, CacheNotifier notifier, Set<Flag> flags)

Method Summary

Object	acceptVisitor(InvocationContext ctx, Visitor visitor) Accept a visitor, and return the result of accepting this visitor.
byte	getCommandId() Used by marshallers to convert this command into an id for streaming.
Object[]	getParameters() Used by marshallers to stream this command across a network
Object	perform(InvocationContext ctx) Performs the primary function of the command.
void	setParameters(int commandId, Object[] parameters) Used by the CommandsFactory to create a command from raw data read off a stream.
void	setReturnCacheEntry(boolean returnCacheEntry) Will make this method to return an CacheEntry instead of the corresponding value associated with the key.

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

equals, getKey, hashCode, ignoreCommandOnStatus, isReturnValueExpected, setKey, shouldInvoke, toString

Methods inherited from class org.infinispan.commands.AbstractFlagAffectedCommand

getFlags, hasFlag, setFlags

Methods inherited from class java.lang.Object

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

Field Detail

COMMAND_ID

public static final byte COMMAND_ID

See Also:

Constant Field Values

Constructor Detail

GetKeyValueCommand

public GetKeyValueCommand(Object key,
                          CacheNotifier notifier,
                          Set<Flag> flags)

GetKeyValueCommand

public GetKeyValueCommand()

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.

Parameters:

ctx - invocation context

visitor - visitor to accept

Returns:

arbitrary return value

Throws:

Throwable - in the event of problems

setReturnCacheEntry

public void setReturnCacheEntry(boolean returnCacheEntry)

Will make this method to return an CacheEntry instead of the corresponding value associated with the key.

perform

public Object 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.

Parameters:

ctx - invocation context

Returns:

arbitrary return value generated by performing this command

Throws:

Throwable - in the event of problems.

getCommandId

public byte 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.

setParameters

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

Description copied from interface: ReplicableCommand

Used by the CommandsFactory to create a command from raw data read off a stream.

Specified by:

setParameters in interface ReplicableCommand

Specified by:

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.

parameters - object array of args

getParameters

public Object[] getParameters()

Description copied from interface: ReplicableCommand

Used by marshallers to stream this command across a network

Specified by:

getParameters in interface ReplicableCommand

Specified by:

getParameters in class AbstractDataCommand

Returns:

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