Package org.infinispan.commands.control

Class LockControlCommand

java.lang.Object

org.infinispan.commands.tx.AbstractTransactionBoundaryCommand

org.infinispan.commands.control.LockControlCommand

All Implemented Interfaces:

FlagAffectedCommand, CacheRpcCommand, ReplicableCommand, TopologyAffectedCommand, TracedCommand, TransactionBoundaryCommand, VisitableCommand, RemoteLockCommand, TransactionalRemoteLockCommand

public class LockControlCommand
extends AbstractTransactionBoundaryCommand
implements FlagAffectedCommand, TopologyAffectedCommand, TransactionalRemoteLockCommand

LockControlCommand is a command that enables distributed locking across infinispan nodes.

For more details refer to: https://jira.jboss.org/jira/browse/ISPN-70 https://jira.jboss.org/jira/browse/ISPN-48

Since:

4.0

Author:

Vladimir Blagojevic (vblagoje@redhat.com), Mircea.Markus@jboss.com

Nested Class Summary

Nested classes/interfaces inherited from interface org.infinispan.commands.VisitableCommand

VisitableCommand.LoadType

Field Summary

Fields

Modifier and Type	Field	Description
static final int	COMMAND_ID

Fields inherited from class org.infinispan.commands.tx.AbstractTransactionBoundaryCommand

cacheName, globalTx

Constructor Summary

Constructors

Constructor	Description
LockControlCommand(Object key, ByteString cacheName, long flags, GlobalTransaction gtx)
LockControlCommand(Collection<?> keys, ByteString cacheName, long flags, GlobalTransaction gtx)
LockControlCommand(ByteString cacheName)

Method Summary

Modifier and Type	Method	Description
Object	acceptVisitor(InvocationContext ctx, Visitor visitor)	Accept a visitor, and return the result of accepting this visitor.
RemoteTxInvocationContext	createContext(ComponentRegistry componentRegistry)	It creates the transaction context.
boolean	equals(Object o)
byte	getCommandId()	Used by marshallers to convert this command into an id for streaming.
long	getFlagsBitSet()
Object	getKeyLockOwner()	It returns the lock owner of the key.
Collection<Object>	getKeys()
Collection<?>	getKeysToLock()	It returns a Collection with the keys to be lock.
Object	getSingleKey()
int	hashCode()
boolean	hasSkipLocking()	It checks if this command should acquire locks.
boolean	hasZeroLockAcquisition()
CompletionStage<?>	invokeAsync(ComponentRegistry registry)	Invoke the command asynchronously.
boolean	isUnlock()
boolean	multipleKeys()
void	readFrom(ObjectInput input)	Reads this instance from the stream written by ReplicableCommand.writeTo(ObjectOutput).
void	setFlagsBitSet(long bitSet)	Set the flags, replacing any existing flags.
void	setGlobalTransaction(GlobalTransaction gtx)
void	setUnlock(boolean unlock)
String	toString()
void	writeTo(ObjectOutput output)	Writes this instance to the ObjectOutput.

Methods inherited from class org.infinispan.commands.tx.AbstractTransactionBoundaryCommand

getCacheName, getGlobalTransaction, getOrigin, getTopologyId, invalidRemoteTxReturnValue, isReturnValueExpected, loadType, markTransactionAsRemote, setOrigin, setTopologyId, visitRemoteTransaction

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.infinispan.commands.FlagAffectedCommand

addFlags, getFlags, hasAllFlags, hasAnyFlag

Methods inherited from interface org.infinispan.commands.ReplicableCommand

canBlock, invoke, invokeAsync, isReturnValueExpected, isSuccessful, logThrowable

Methods inherited from interface org.infinispan.commands.TopologyAffectedCommand

getTopologyId, setTopologyId

Methods inherited from interface org.infinispan.commands.TracedCommand

getOperationName, getSpanAttributes, setSpanAttributes

Methods inherited from interface org.infinispan.commands.VisitableCommand

init, loadType

Field Details

COMMAND_ID

public static final int COMMAND_ID

See Also:

• Constant Field Values

Constructor Details

LockControlCommand

public LockControlCommand(ByteString cacheName)

LockControlCommand

public LockControlCommand(Collection<?> keys,
 ByteString cacheName,
 long flags,
 GlobalTransaction gtx)

LockControlCommand

public LockControlCommand(Object key,
 ByteString cacheName,
 long flags,
 GlobalTransaction gtx)

Method Details

setGlobalTransaction

public void setGlobalTransaction(GlobalTransaction gtx)

getKeys

public Collection<Object> getKeys()

multipleKeys

public boolean multipleKeys()

getSingleKey

public Object getSingleKey()

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

invokeAsync

public CompletionStage<?> invokeAsync(ComponentRegistry registry)
                               throws Throwable

Description copied from interface: CacheRpcCommand

Invoke the command asynchronously.

This method replaces ReplicableCommand.invoke() for remote execution. The default implementation and ReplicableCommand.invoke() will be removed in future versions.

Specified by:

invokeAsync in interface CacheRpcCommand

Overrides:

invokeAsync in class AbstractTransactionBoundaryCommand

Throws:

Throwable

createContext

public RemoteTxInvocationContext createContext(ComponentRegistry componentRegistry)

Description copied from interface: TransactionalRemoteLockCommand

It creates the transaction context.

Specified by:

createContext in interface TransactionalRemoteLockCommand

Returns:

the TxInvocationContext.

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.

writeTo

public void writeTo(ObjectOutput output)
             throws IOException

Description copied from interface: ReplicableCommand

Writes this instance to the ObjectOutput.

Specified by:

writeTo in interface ReplicableCommand

Overrides:

writeTo in class AbstractTransactionBoundaryCommand

Parameters:

output - the stream.

Throws:

IOException - if an error occurred during the I/O.

readFrom

public void readFrom(ObjectInput input)
              throws IOException,
ClassNotFoundException

Description copied from interface: ReplicableCommand

Reads this instance from the stream written by ReplicableCommand.writeTo(ObjectOutput).

Specified by:

readFrom in interface ReplicableCommand

Overrides:

readFrom in class AbstractTransactionBoundaryCommand

Parameters:

input - the stream to read.

Throws:

IOException - if an error occurred during the I/O.

ClassNotFoundException - if it tries to load an undefined class.

isUnlock

public boolean isUnlock()

setUnlock

public void setUnlock(boolean unlock)

equals

public boolean equals(Object o)

Overrides:

equals in class AbstractTransactionBoundaryCommand

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractTransactionBoundaryCommand

toString

public String toString()

Overrides:

toString in class AbstractTransactionBoundaryCommand

getFlagsBitSet

public long getFlagsBitSet()

Specified by:

getFlagsBitSet in interface FlagAffectedCommand

Returns:

The command flags. Flags can be modified with FlagAffectedCommand.setFlagsBitSet(long), FlagAffectedCommand.addFlags(long) and FlagAffectedCommand.addFlags(long) methods.

setFlagsBitSet

public void setFlagsBitSet(long bitSet)

Description copied from interface: FlagAffectedCommand

Set the flags, replacing any existing flags.

Specified by:

setFlagsBitSet in interface FlagAffectedCommand

getKeysToLock

public Collection<?> getKeysToLock()

Description copied from interface: RemoteLockCommand

It returns a Collection with the keys to be lock.

It may return an empty collection if no keys needs to be locked independently of the return value of RemoteLockCommand.hasSkipLocking(). It may contains duplicated keys and null is not a valid return value.

Specified by:

getKeysToLock in interface RemoteLockCommand

Returns:

a Collection of keys to lock.

getKeyLockOwner

public Object getKeyLockOwner()

Description copied from interface: RemoteLockCommand

It returns the lock owner of the key.

Usually, in transaction caches it is the GlobalTransaction and in non-transactional caches the CommandInvocationId.

Specified by:

getKeyLockOwner in interface RemoteLockCommand

Returns:

the lock owner of the key.

hasZeroLockAcquisition

public boolean hasZeroLockAcquisition()

Specified by:

hasZeroLockAcquisition in interface RemoteLockCommand

Returns:

it the locks should be acquire with 0 (zero) acquisition timeout.

hasSkipLocking

public boolean hasSkipLocking()

Description copied from interface: RemoteLockCommand

It checks if this command should acquire locks.

Specified by:

hasSkipLocking in interface RemoteLockCommand

Returns:

true if locks should be acquired for the keys in RemoteLockCommand.getKeysToLock().