org.apache.jackrabbit.mk.store
Class CopyingGC

java.lang.Object
  org.apache.jackrabbit.mk.store.CopyingGC

All Implemented Interfaces:

RevisionProvider, RevisionStore

public class CopyingGC
extends Object
implements RevisionStore

Revision garbage collector that copies reachable revisions from a "from" revision store to a "to" revision store. It assumes that both stores share the same blob store. In the current design, the head revision and all the nodes it references are reachable.

Constructor Summary

CopyingGC(RevisionStore rsFrom, RevisionStore rsTo)
Create a new instance of this class.

Method Summary

void	gc()
ChildNodeEntriesMap	getCNEMap(Id id)
StoredCommit	getCommit(Id id)
StoredCommit	getHeadCommit()
Id	getHeadCommitId()
Id	getId(NodeState node) Adapts the given NodeState to the corresponding identifier.
StoredNode	getNode(Id id)
NodeState	getNodeState(StoredNode node) Adapts the given StoredNode to a corresponding NodeState instance.
StoredNode	getRootNode(Id commitId)
void	lockHead() Lock the head.
Id	putCNEMap(ChildNodeEntriesMap map)
Id	putHeadCommit(MutableCommit commit) Put a new head commit.
Id	putNode(MutableNode node)
void	unlockHead() Unlock the head.

Methods inherited from class java.lang.Object

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

Constructor Detail

CopyingGC

public CopyingGC(RevisionStore rsFrom,
                 RevisionStore rsTo)

Create a new instance of this class.

Parameters:

rsFrom - from store

rsTo - to store

Method Detail

gc

public void gc()

getNodeState

public NodeState getNodeState(StoredNode node)

Description copied from interface: RevisionProvider

Adapts the given StoredNode to a corresponding NodeState instance.

Specified by:

getNodeState in interface RevisionProvider

Parameters:

node - stored node instance

Returns:

node state adapter

getId

public Id getId(NodeState node)

Description copied from interface: RevisionProvider

Adapts the given NodeState to the corresponding identifier.

Specified by:

getId in interface RevisionProvider

Parameters:

node - node state

Returns:

node identifier

getNode

public StoredNode getNode(Id id)
                   throws NotFoundException,
                          Exception

Specified by:

getNode in interface RevisionProvider

Throws:

NotFoundException

Exception

getCommit

public StoredCommit getCommit(Id id)
                       throws NotFoundException,
                              Exception

Specified by:

getCommit in interface RevisionProvider

Throws:

NotFoundException

Exception

getCNEMap

public ChildNodeEntriesMap getCNEMap(Id id)
                              throws NotFoundException,
                                     Exception

Specified by:

getCNEMap in interface RevisionProvider

Throws:

NotFoundException

Exception

getRootNode

public StoredNode getRootNode(Id commitId)
                       throws NotFoundException,
                              Exception

Specified by:

getRootNode in interface RevisionProvider

Throws:

NotFoundException

Exception

getHeadCommit

public StoredCommit getHeadCommit()
                           throws Exception

Specified by:

getHeadCommit in interface RevisionProvider

Throws:

Exception

getHeadCommitId

public Id getHeadCommitId()
                   throws Exception

Specified by:

getHeadCommitId in interface RevisionProvider

Throws:

Exception

putNode

public Id putNode(MutableNode node)
           throws Exception

Specified by:

putNode in interface RevisionStore

Throws:

Exception

putCNEMap

public Id putCNEMap(ChildNodeEntriesMap map)
             throws Exception

Specified by:

putCNEMap in interface RevisionStore

Throws:

Exception

lockHead

public void lockHead()

Description copied from interface: RevisionStore

Lock the head. Must be called prior to putting a new head commit.

Specified by:

lockHead in interface RevisionStore

See Also:

RevisionStore.putHeadCommit(MutableCommit)

putHeadCommit

public Id putHeadCommit(MutableCommit commit)
                 throws Exception

Description copied from interface: RevisionStore

Put a new head commit. Must be called while holding a lock on the head.

Specified by:

putHeadCommit in interface RevisionStore

Parameters:

commit - commit

Returns:

head commit id

Throws:

Exception - if an error occurs

See Also:

RevisionStore.lockHead()

unlockHead

public void unlockHead()

Description copied from interface: RevisionStore

Unlock the head.

Specified by:

unlockHead in interface RevisionStore