org.infinispan.commands.write

Class ReplaceCommand

java.lang.Object

org.infinispan.commands.AbstractLocalFlagAffectedCommand

org.infinispan.commands.AbstractFlagAffectedCommand

org.infinispan.commands.read.AbstractDataCommand

org.infinispan.commands.write.AbstractDataWriteCommand

org.infinispan.commands.write.ReplaceCommand

All Implemented Interfaces:

DataCommand, FlagAffectedCommand, LocalFlagAffectedCommand, MetadataAwareCommand, ReplicableCommand, TopologyAffectedCommand, VisitableCommand, DataWriteCommand, WriteCommand

public class ReplaceCommand
extends AbstractDataWriteCommand
implements MetadataAwareCommand

Since:

4.0

Author:

Mircea.Markus@jboss.com, Galder Zamarreño

Field Summary

Fields

Modifier and Type	Field and Description
static byte	COMMAND_ID

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

key

Fields inherited from class org.infinispan.commands.AbstractLocalFlagAffectedCommand

flags

Constructor Summary

Constructors

Constructor and Description
ReplaceCommand()
ReplaceCommand(Object key, Object oldValue, Object newValue, CacheNotifier notifier, Metadata metadata, Set<Flag> flags, Equivalence valueEquivalence)

Method Summary

Methods

Modifier and Type	Method and Description
Object	acceptVisitor(InvocationContext ctx, Visitor visitor) Accept a visitor, and return the result of accepting this visitor.
boolean	equals(Object o)
byte	getCommandId() Used by marshallers to convert this command into an id for streaming.
Metadata	getMetadata() Get metadata of this command.
Object	getNewValue()
Object	getOldValue()
Object[]	getParameters() Used by marshallers to stream this command across a network
int	hashCode()
void	init(CacheNotifier notifier, Configuration cfg)
boolean	isConditional() Certain commands only work based on a certain condition or state of the cache.
boolean	isIgnorePreviousValue() Only relevant for conditional commands.
boolean	isReturnValueExpected() If true, a return value will be provided when performed remotely.
boolean	isSuccessful() Some commands may want to provide information on whether the command was successful or not.
Object	perform(InvocationContext ctx) Performs the primary function of the command.
void	setIgnorePreviousValue(boolean ignorePreviousValue) Only relevant for conditional commands.
void	setMetadata(Metadata metadata) Sets metadata for this command.
void	setNewValue(Object newValue)
void	setOldValue(Object oldValue)
void	setParameters(int commandId, Object[] parameters) Used by the CommandsFactory to create a command from raw data read off a stream.
String	toString()

Methods inherited from class org.infinispan.commands.write.AbstractDataWriteCommand

canBlock, getAffectedKeys

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

getKey, ignoreCommandOnStatus, setKey, shouldInvoke

Methods inherited from class org.infinispan.commands.AbstractFlagAffectedCommand

getTopologyId, setTopologyId

Methods inherited from class org.infinispan.commands.AbstractLocalFlagAffectedCommand

getFlags, hasFlag, setFlags, setFlags

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.infinispan.commands.VisitableCommand

ignoreCommandOnStatus, shouldInvoke

Methods inherited from interface org.infinispan.commands.TopologyAffectedCommand

getTopologyId, setTopologyId

Methods inherited from interface org.infinispan.commands.LocalFlagAffectedCommand

getFlags, hasFlag, setFlags, setFlags

Methods inherited from interface org.infinispan.commands.DataCommand

getKey

Field Detail

COMMAND_ID

public static final byte COMMAND_ID

See Also:

Constant Field Values

Constructor Detail

ReplaceCommand

public ReplaceCommand()

ReplaceCommand

public ReplaceCommand(Object key,
              Object oldValue,
              Object newValue,
              CacheNotifier notifier,
              Metadata metadata,
              Set<Flag> flags,
              Equivalence valueEquivalence)

Method Detail

init

public void init(CacheNotifier notifier,
        Configuration cfg)

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

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.

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.

getCommandId

public byte 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.

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.

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

equals

public boolean equals(Object o)

Overrides:

equals in class AbstractDataCommand

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractDataCommand

isSuccessful

public boolean isSuccessful()

Description copied from interface: WriteCommand

Some commands may want to provide information on whether the command was successful or not. This is different from a failure, which usually would result in an exception being thrown. An example is a putIfAbsent() not doing anything because the key in question was present. This would result in a isSuccessful() call returning false.

Specified by:

isSuccessful in interface WriteCommand

Returns:

true if the command completed successfully, false otherwise.

isConditional

public boolean isConditional()

Description copied from interface: WriteCommand

Certain commands only work based on a certain condition or state of the cache. For example, ConcurrentMap.putIfAbsent(Object, Object) only does anything if a condition is met, i.e., the entry in question is not already present. This method tests whether the command in question is conditional or not.

Specified by:

isConditional in interface WriteCommand

Returns:

true if the command is conditional, false otherwise

getMetadata

public Metadata getMetadata()

Description copied from interface: MetadataAwareCommand

Get metadata of this command.

Specified by:

getMetadata in interface MetadataAwareCommand

Overrides:

getMetadata in class AbstractFlagAffectedCommand

Returns:

an instance of Metadata

setMetadata

public void setMetadata(Metadata metadata)

Description copied from interface: MetadataAwareCommand

Sets metadata for this command.

Specified by:

setMetadata in interface MetadataAwareCommand

Overrides:

setMetadata in class AbstractFlagAffectedCommand

getOldValue

public Object getOldValue()

setOldValue

public void setOldValue(Object oldValue)

getNewValue

public Object getNewValue()

setNewValue

public void setNewValue(Object newValue)

isIgnorePreviousValue

public boolean isIgnorePreviousValue()

Description copied from interface: WriteCommand

Only relevant for conditional commands.

Specified by:

isIgnorePreviousValue in interface WriteCommand

Returns:

true if the command isn't really conditional, because the previous value was already checked - either on the originator (tx) or on the primary owner (non-tx).

setIgnorePreviousValue

public void setIgnorePreviousValue(boolean ignorePreviousValue)

Description copied from interface: WriteCommand

Only relevant for conditional commands.

Specified by:

setIgnorePreviousValue in interface WriteCommand

Parameters:

ignorePreviousValue - true if the command isn't really conditional, because the previous value was already checked - either on the originator (tx) or on the primary owner (non-tx).

isReturnValueExpected

public final boolean isReturnValueExpected()

Description copied from interface: ReplicableCommand

If true, a return value will be provided when performed remotely. Otherwise, a remote ResponseGenerator may choose to simply return null to save on marshalling costs.

Specified by:

isReturnValueExpected in interface ReplicableCommand

Overrides:

isReturnValueExpected in class AbstractDataWriteCommand

Returns:

true or false

toString

public String toString()

Overrides:

toString in class AbstractDataCommand