org.jboss.cache.buddyreplication
Class BuddyFqnTransformer

java.lang.Object
  org.jboss.cache.commands.AbstractVisitor
      org.jboss.cache.buddyreplication.BuddyFqnTransformer

All Implemented Interfaces:

Visitor

public class BuddyFqnTransformer
extends AbstractVisitor

For each command the fqns are chnaged such that they are under the current buddy group's backup subtree (e.g., /_buddy_backup_/my_host:7890/) rather than the root (/).

Since:

2.2

Author:

Mircea.Markus@jboss.com

Field Summary

static String	BUDDY_BACKUP_SUBTREE
static Fqn<String>	BUDDY_BACKUP_SUBTREE_FQN

Constructor Summary

BuddyFqnTransformer(String buddyGroupName)

BuddyFqnTransformer(String buddyGroupName, CommandsFactory cf)

Method Summary

static Fqn	getActualFqn(Fqn fqn)
static Fqn	getBackupFqn(org.jgroups.Address dataOwnerAddress, Fqn origFqn) Utility method that retrieves a buddy backup Fqn given the actual Fqn of some data and the data owner's Address.
Fqn	getBackupFqn(Fqn originalFqn) Assumes the backup Fqn if the current instance is the data owner.
static Fqn	getBackupFqn(Fqn buddyGroupRoot, Fqn origFqn) Utility method that retrieves a buddy backup Fqn given the actual Fqn of some data and the backup subtree for the buddy group in question
static Fqn	getBackupFqn(String buddyGroupName, Fqn origFqn) Utility method that retrieves a buddy backup Fqn given the actual Fqn of some data and the buddy group name.
static Fqn<String>	getBackupRoot(org.jgroups.Address dataOwner)
static Fqn	getBackupRootFromFqn(Fqn fqn) Returns the buddy backp root portion of a given Fqn, provided it is a backup Fqn.
static Fqn<String>	getDeadBackupRoot(org.jgroups.Address dataOwner) Returns the backup root of a dead data owner
static String	getGroupNameFromAddress(org.jgroups.Address address)
static boolean	isBackupFqn(Fqn name)
static boolean	isDeadBackupFqn(Fqn name) Tests whether a given Fqn belongs to a dead backup region.
static boolean	isDeadBackupRoot(Fqn f)
List<ReversibleCommand>	transformBatch(List<ReversibleCommand> toTransform)
Object	visitCommitCommand(InvocationContext ctx, CommitCommand commitCommand) Visits a CommitCommand.
Object	visitCreateNodeCommand(InvocationContext ctx, CreateNodeCommand command) Visits a CreateNodeCommand.
Object	visitEvictFqnCommand(InvocationContext ctx, EvictCommand command) Visits a EvictCommand.
Object	visitExistsNodeCommand(InvocationContext ctx, ExistsCommand command) Visits a RemoteExistsCommand.
Object	visitGetChildrenNamesCommand(InvocationContext ctx, GetChildrenNamesCommand command) Visits a GetChildrenNamesCommand.
Object	visitGetDataMapCommand(InvocationContext ctx, GetDataMapCommand command) Visits a GetDataMapCommand.
Object	visitGetKeysCommand(InvocationContext ctx, GetKeysCommand command) Visits a GetKeysCommand.
Object	visitGetKeyValueCommand(InvocationContext ctx, GetKeyValueCommand command) Visits a GetKeyValueCommand.
Object	visitGetNodeCommand(InvocationContext ctx, GetNodeCommand command) Visits a GetNodeCommand.
Object	visitGravitateDataCommand(InvocationContext ctx, GravitateDataCommand command) Visits a GravitateDataCommand.
Object	visitInvalidateCommand(InvocationContext ctx, InvalidateCommand command) Visits a InvalidateCommand.
Object	visitMoveCommand(InvocationContext ctx, MoveCommand command) Visits a MoveCommand.
Object	visitOptimisticPrepareCommand(InvocationContext ctx, OptimisticPrepareCommand command) Visits a OptimisticPrepareCommand.
Object	visitPrepareCommand(InvocationContext ctx, PrepareCommand command) Visits a PrepareCommand.
Object	visitPutDataMapCommand(InvocationContext ctx, PutDataMapCommand command) Visits a PutDataMapCommand.
Object	visitPutKeyValueCommand(InvocationContext ctx, PutKeyValueCommand command) Visits a PutKeyValueCommand.
Object	visitRemoveDataCommand(InvocationContext ctx, RemoveDataCommand command) Visits a RemoveDataCommand.
Object	visitRemoveKeyCommand(InvocationContext ctx, RemoveKeyCommand command) Visits a RemoveKeyCommand.
Object	visitRemoveNodeCommand(InvocationContext ctx, RemoveNodeCommand command) Visits a RemoveNodeCommand.
Object	visitRollbackCommand(InvocationContext ctx, RollbackCommand command) Visits a RollbackCommand.

Methods inherited from class org.jboss.cache.commands.AbstractVisitor

handleDefault, visitCollection

Methods inherited from class java.lang.Object

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

Field Detail

BUDDY_BACKUP_SUBTREE

public static final String BUDDY_BACKUP_SUBTREE

See Also:

Constant Field Values

BUDDY_BACKUP_SUBTREE_FQN

public static final Fqn<String> BUDDY_BACKUP_SUBTREE_FQN

Constructor Detail

BuddyFqnTransformer

public BuddyFqnTransformer(String buddyGroupName)

BuddyFqnTransformer

public BuddyFqnTransformer(String buddyGroupName,
                           CommandsFactory cf)

Method Detail

visitCommitCommand

public Object visitCommitCommand(InvocationContext ctx,
                                 CommitCommand commitCommand)
                          throws Throwable

Description copied from interface: Visitor

Visits a CommitCommand.

Specified by:

visitCommitCommand in interface Visitor

Overrides:

visitCommitCommand in class AbstractVisitor

Parameters:

ctx - invocation context

commitCommand - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitPutDataMapCommand

public Object visitPutDataMapCommand(InvocationContext ctx,
                                     PutDataMapCommand command)
                              throws Throwable

Description copied from interface: Visitor

Visits a PutDataMapCommand.

Specified by:

visitPutDataMapCommand in interface Visitor

Overrides:

visitPutDataMapCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitPutKeyValueCommand

public Object visitPutKeyValueCommand(InvocationContext ctx,
                                      PutKeyValueCommand command)
                               throws Throwable

Description copied from interface: Visitor

Visits a PutKeyValueCommand.

Specified by:

visitPutKeyValueCommand in interface Visitor

Overrides:

visitPutKeyValueCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitRemoveNodeCommand

public Object visitRemoveNodeCommand(InvocationContext ctx,
                                     RemoveNodeCommand command)
                              throws Throwable

Description copied from interface: Visitor

Visits a RemoveNodeCommand.

Specified by:

visitRemoveNodeCommand in interface Visitor

Overrides:

visitRemoveNodeCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitRemoveDataCommand

public Object visitRemoveDataCommand(InvocationContext ctx,
                                     RemoveDataCommand command)
                              throws Throwable

Description copied from interface: Visitor

Visits a RemoveDataCommand.

Specified by:

visitRemoveDataCommand in interface Visitor

Overrides:

visitRemoveDataCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitEvictFqnCommand

public Object visitEvictFqnCommand(InvocationContext ctx,
                                   EvictCommand command)
                            throws Throwable

Description copied from interface: Visitor

Visits a EvictCommand.

Specified by:

visitEvictFqnCommand in interface Visitor

Overrides:

visitEvictFqnCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitInvalidateCommand

public Object visitInvalidateCommand(InvocationContext ctx,
                                     InvalidateCommand command)
                              throws Throwable

Description copied from interface: Visitor

Visits a InvalidateCommand.

Specified by:

visitInvalidateCommand in interface Visitor

Overrides:

visitInvalidateCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitRemoveKeyCommand

public Object visitRemoveKeyCommand(InvocationContext ctx,
                                    RemoveKeyCommand command)
                             throws Throwable

Description copied from interface: Visitor

Visits a RemoveKeyCommand.

Specified by:

visitRemoveKeyCommand in interface Visitor

Overrides:

visitRemoveKeyCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitGetDataMapCommand

public Object visitGetDataMapCommand(InvocationContext ctx,
                                     GetDataMapCommand command)
                              throws Throwable

Description copied from interface: Visitor

Visits a GetDataMapCommand.

Specified by:

visitGetDataMapCommand in interface Visitor

Overrides:

visitGetDataMapCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitExistsNodeCommand

public Object visitExistsNodeCommand(InvocationContext ctx,
                                     ExistsCommand command)
                              throws Throwable

Description copied from interface: Visitor

Visits a RemoteExistsCommand.

Specified by:

visitExistsNodeCommand in interface Visitor

Overrides:

visitExistsNodeCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitGetKeyValueCommand

public Object visitGetKeyValueCommand(InvocationContext ctx,
                                      GetKeyValueCommand command)
                               throws Throwable

Description copied from interface: Visitor

Visits a GetKeyValueCommand.

Specified by:

visitGetKeyValueCommand in interface Visitor

Overrides:

visitGetKeyValueCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitGetNodeCommand

public Object visitGetNodeCommand(InvocationContext ctx,
                                  GetNodeCommand command)
                           throws Throwable

Description copied from interface: Visitor

Visits a GetNodeCommand.

Specified by:

visitGetNodeCommand in interface Visitor

Overrides:

visitGetNodeCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitGetKeysCommand

public Object visitGetKeysCommand(InvocationContext ctx,
                                  GetKeysCommand command)
                           throws Throwable

Description copied from interface: Visitor

Visits a GetKeysCommand.

Specified by:

visitGetKeysCommand in interface Visitor

Overrides:

visitGetKeysCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitGetChildrenNamesCommand

public Object visitGetChildrenNamesCommand(InvocationContext ctx,
                                           GetChildrenNamesCommand command)
                                    throws Throwable

Description copied from interface: Visitor

Visits a GetChildrenNamesCommand.

Specified by:

visitGetChildrenNamesCommand in interface Visitor

Overrides:

visitGetChildrenNamesCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitMoveCommand

public Object visitMoveCommand(InvocationContext ctx,
                               MoveCommand command)
                        throws Throwable

Description copied from interface: Visitor

Visits a MoveCommand.

Specified by:

visitMoveCommand in interface Visitor

Overrides:

visitMoveCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitGravitateDataCommand

public Object visitGravitateDataCommand(InvocationContext ctx,
                                        GravitateDataCommand command)
                                 throws Throwable

Description copied from interface: Visitor

Visits a GravitateDataCommand.

Specified by:

visitGravitateDataCommand in interface Visitor

Overrides:

visitGravitateDataCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitPrepareCommand

public Object visitPrepareCommand(InvocationContext ctx,
                                  PrepareCommand command)
                           throws Throwable

Description copied from interface: Visitor

Visits a PrepareCommand.

Specified by:

visitPrepareCommand in interface Visitor

Overrides:

visitPrepareCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitRollbackCommand

public Object visitRollbackCommand(InvocationContext ctx,
                                   RollbackCommand command)
                            throws Throwable

Description copied from interface: Visitor

Visits a RollbackCommand.

Specified by:

visitRollbackCommand in interface Visitor

Overrides:

visitRollbackCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitOptimisticPrepareCommand

public Object visitOptimisticPrepareCommand(InvocationContext ctx,
                                            OptimisticPrepareCommand command)
                                     throws Throwable

Description copied from interface: Visitor

Visits a OptimisticPrepareCommand.

Specified by:

visitOptimisticPrepareCommand in interface Visitor

Overrides:

visitOptimisticPrepareCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitCreateNodeCommand

public Object visitCreateNodeCommand(InvocationContext ctx,
                                     CreateNodeCommand command)
                              throws Throwable

Description copied from interface: Visitor

Visits a CreateNodeCommand.

Specified by:

visitCreateNodeCommand in interface Visitor

Overrides:

visitCreateNodeCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

getBackupFqn

public Fqn getBackupFqn(Fqn originalFqn)

Assumes the backup Fqn if the current instance is the data owner.

transformBatch

public List<ReversibleCommand> transformBatch(List<ReversibleCommand> toTransform)
                                       throws Throwable

Throws:

Throwable

getBackupFqn

public static Fqn getBackupFqn(org.jgroups.Address dataOwnerAddress,
                               Fqn origFqn)

Utility method that retrieves a buddy backup Fqn given the actual Fqn of some data and the data owner's Address.

Parameters:

dataOwnerAddress - the JGroups Address of the data owner

origFqn - the original Fqn

Returns:

a backup Fqn

getBackupFqn

public static Fqn getBackupFqn(String buddyGroupName,
                               Fqn origFqn)

Utility method that retrieves a buddy backup Fqn given the actual Fqn of some data and the buddy group name.

Parameters:

buddyGroupName - the buddy group name

origFqn - the original Fqn

Returns:

a backup Fqn

getBackupFqn

public static Fqn getBackupFqn(Fqn buddyGroupRoot,
                               Fqn origFqn)

Utility method that retrieves a buddy backup Fqn given the actual Fqn of some data and the backup subtree for the buddy group in question

Parameters:

buddyGroupRoot - the subtree under which data for a particular buddy is backed up

origFqn - the original Fqn

Returns:

a backup Fqn

isBackupFqn

public static boolean isBackupFqn(Fqn name)

getActualFqn

public static Fqn getActualFqn(Fqn fqn)

isDeadBackupFqn

public static boolean isDeadBackupFqn(Fqn name)

Tests whether a given Fqn belongs to a dead backup region.

Parameters:

name - fqn to test

Returns:

true if the fqn is a part of a dead backup region; false otherwise.

getBackupRoot

public static Fqn<String> getBackupRoot(org.jgroups.Address dataOwner)

Parameters:

dataOwner - owner of a data set

Returns:

a backup root for a given data owner

getDeadBackupRoot

public static Fqn<String> getDeadBackupRoot(org.jgroups.Address dataOwner)

Returns the backup root of a dead data owner

Parameters:

dataOwner - owner of data

Returns:

Fqn of dead data owner's root

isDeadBackupRoot

public static boolean isDeadBackupRoot(Fqn f)

getGroupNameFromAddress

public static String getGroupNameFromAddress(org.jgroups.Address address)

getBackupRootFromFqn

public static Fqn getBackupRootFromFqn(Fqn fqn)

Returns the buddy backp root portion of a given Fqn, provided it is a backup Fqn. If it is not a backup Fqn, Fqn.ROOT is returned.

Parameters:

fqn - fqn