org.jboss.cache.commands.remote

Class ClusteredGetCommand

java.lang.Object

org.jboss.cache.commands.remote.ClusteredGetCommand

All Implemented Interfaces:

ReplicableCommand

public class ClusteredGetCommand
extends Object
implements ReplicableCommand

Issues a clustered get call, for use primarily by the ClusteredCacheLoader. This is not a VisitableCommand and hence not passed up the CommandInterceptor chain.

Since:

2.2.0

Author:

Mircea.Markus@jboss.com

Field Summary

Fields

Modifier and Type	Field and Description
static int	METHOD_ID

Constructor Summary

Constructors

Constructor and Description
ClusteredGetCommand()
ClusteredGetCommand(boolean searchBackupSubtrees, DataCommand dataCommand)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o)
int	getCommandId() Used by marshallers to convert this command into an id for streaming.
DataCommand	getDataCommand()
Object[]	getParameters() Used by marshallers to stream this command across a network
Boolean	getSearchBackupSubtrees()
int	hashCode()
void	initialize(DataContainer dataContainer, InterceptorChain interceptorChain)
Object	perform(InvocationContext context) Invokes a DataCommand on a remote cache and returns results.
void	setParameters(int commandId, Object[] args) Used by the CommandsFactory to create a command from raw data read off a stream.
String	toString()

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

Constructor Detail

ClusteredGetCommand

public ClusteredGetCommand(boolean searchBackupSubtrees,
                   DataCommand dataCommand)

ClusteredGetCommand

public ClusteredGetCommand()

Method Detail

initialize

public void initialize(DataContainer dataContainer,
              InterceptorChain interceptorChain)

perform

public Object perform(InvocationContext context)
               throws Throwable

Invokes a DataCommand on a remote cache and returns results.

Specified by:

perform in interface ReplicableCommand

Parameters:

context - invocation context, ignored.

Returns:

a List containing 2 elements: a boolean, (true or false) and a value (Object) which is the result of invoking a remote get specified by getDataCommand(). If buddy replication is used one further element is added - an Fqn of the backup subtree in which this node may be found.

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.

Specified by:

getCommandId in interface ReplicableCommand

Returns:

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

getSearchBackupSubtrees

public Boolean getSearchBackupSubtrees()

getDataCommand

public DataCommand getDataCommand()

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

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 interface: ReplicableCommand

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

Specified by:

setParameters in interface ReplicableCommand

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

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object