org.apache.jackrabbit.core.persistence.obj
Class ObjectPersistenceManager

java.lang.Object
  org.apache.jackrabbit.core.persistence.AbstractPersistenceManager
      org.apache.jackrabbit.core.persistence.obj.ObjectPersistenceManager

All Implemented Interfaces:

PersistenceManager

public class ObjectPersistenceManager
extends AbstractPersistenceManager

ObjectPersistenceManager is a FileSystem-based PersistenceManager that persists ItemState and NodeReferences objects using a simple custom binary serialization format (see Serializer).

Constructor Summary

ObjectPersistenceManager()
Creates a new ObjectPersistenceManager instance.

Method Summary

void	close() Closes the persistence manager.
protected void	destroy(NodeReferences refs) Destroy a node references object.
protected void	destroy(NodeState state) Destroy a node state.
protected void	destroy(PropertyState state) Destroy a property state.
boolean	exists(NodeId id) Checks whether the identified node exists.
boolean	exists(PropertyId id) Checks whether the identified property exists.
boolean	existsReferencesTo(NodeId id) Checks whether references of the identified target node exist.
void	init(PMContext context) Initializes the persistence manager.
NodeState	load(NodeId id) Load the persistent members of a node state.
PropertyState	load(PropertyId id) Load the persistent members of a property state.
NodeReferences	loadReferencesTo(NodeId id) Load the persisted references to the node with the given identifier.
protected void	store(NodeReferences refs) Store a references object.
protected void	store(NodeState state) Store a node state.
protected void	store(PropertyState state) Store a property state.

Methods inherited from class org.apache.jackrabbit.core.persistence.AbstractPersistenceManager

checkConsistency, createNew, createNew, store

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectPersistenceManager

public ObjectPersistenceManager()

Creates a new ObjectPersistenceManager instance.

Method Detail

init

public void init(PMContext context)
          throws Exception

Initializes the persistence manager. The persistence manager is permanently bound to the given context, and any required external resources are acquired.

An appropriate exception is thrown if the persistence manager initialization fails for whatever reason. In this case the state of the persistence manager is undefined and the instance should be discarded.

Parameters:

context - persistence manager context

Throws:

Exception - if the persistence manager initialization failed

close

public void close()
           throws Exception

Closes the persistence manager. The consistency of the persistent storage is guaranteed and all acquired resources are released. It is an error to invoke any methods on a closed persistence manager, and implementations are free to enforce this constraint by throwing IllegalStateExceptions in such cases.

An appropriate exception is thrown if the persistence manager could not be closed properly. In this case the state of the persistence manager is undefined and the instance should be discarded.

Throws:

Exception - if the persistence manager failed to close properly

load

public NodeState load(NodeId id)
               throws NoSuchItemStateException,
                      ItemStateException

Load the persistent members of a node state.

Parameters:

id - node id

Returns:

loaded node state

Throws:

NoSuchItemStateException - if the node state does not exist

ItemStateException - if another error occurs

load

public PropertyState load(PropertyId id)
                   throws NoSuchItemStateException,
                          ItemStateException

Load the persistent members of a property state.

Parameters:

id - property id

Returns:

loaded property state

Throws:

NoSuchItemStateException - if the property state does not exist

ItemStateException - if another error occurs

loadReferencesTo

public NodeReferences loadReferencesTo(NodeId id)
                                throws NoSuchItemStateException,
                                       ItemStateException

Load the persisted references to the node with the given identifier.

Parameters:

id - reference target node id

Throws:

NoSuchItemStateException - if the target node does not exist

ItemStateException - if another error occurs

store

protected void store(NodeState state)
              throws ItemStateException

Store a node state. Subclass responsibility.

Specified by:

store in class AbstractPersistenceManager

Parameters:

state - node state to store

Throws:

ItemStateException - if an error occurs

store

protected void store(PropertyState state)
              throws ItemStateException

Store a property state. Subclass responsibility.

Specified by:

store in class AbstractPersistenceManager

Parameters:

state - property state to store

Throws:

ItemStateException - if an error occurs

store

protected void store(NodeReferences refs)
              throws ItemStateException

Store a references object. Subclass responsibility.

Specified by:

store in class AbstractPersistenceManager

Parameters:

refs - references object to store

Throws:

ItemStateException - if an error occurs

destroy

protected void destroy(NodeState state)
                throws ItemStateException

Destroy a node state. Subclass responsibility.

Specified by:

destroy in class AbstractPersistenceManager

Parameters:

state - node state to destroy

Throws:

ItemStateException - if an error occurs

destroy

protected void destroy(PropertyState state)
                throws ItemStateException

Destroy a property state. Subclass responsibility.

Specified by:

destroy in class AbstractPersistenceManager

Parameters:

state - property state to destroy

Throws:

ItemStateException - if an error occurs

destroy

protected void destroy(NodeReferences refs)
                throws ItemStateException

Destroy a node references object. Subclass responsibility.

Specified by:

destroy in class AbstractPersistenceManager

Parameters:

refs - node references object to destroy

Throws:

ItemStateException - if an error occurs

exists

public boolean exists(PropertyId id)
               throws ItemStateException

Checks whether the identified property exists.

Parameters:

id - property id

Returns:

true if the property exists, false otherwise

Throws:

ItemStateException - on persistence manager errors

exists

public boolean exists(NodeId id)
               throws ItemStateException

Checks whether the identified node exists.

Parameters:

id - node id

Returns:

true if the node exists, false otherwise

Throws:

ItemStateException - on persistence manager errors

existsReferencesTo

public boolean existsReferencesTo(NodeId id)
                           throws ItemStateException

Checks whether references of the identified target node exist.

Parameters:

id - target node id

Returns:

true if the references exist, false otherwise

Throws:

ItemStateException - on persistence manager errors