org.modeshape.connector.store.jpa.model.simple
Class SimpleJpaRepository

java.lang.Object
  org.modeshape.graph.connector.map.MapRepository
      org.modeshape.connector.store.jpa.model.simple.SimpleJpaRepository

public class SimpleJpaRepository
extends MapRepository

Implementation of MapRepository for the Simple JPA connector model. This class exposes a map of workspace names to workspaces and each workspace provides a logical mapping of node UUIDs to nodes. The JpaNode class functions as an adapter between the persistent entity for nodes and the map repository interface for nodes.

This class differs slightly from the other MapRepository implementations in that it exists only within the lifetime of a single EntityManager (which itself is opened and closed within the lifetime of a single SimpleJpaConnection. The other map repository implementations all outlive any particular connection and generally survive for the lifetime of the ModeShape server.

Nested Class Summary

protected class	SimpleJpaRepository.JpaNode Adapter between the persistent entity for nodes and the map repository interface for nodes.
protected class	SimpleJpaRepository.LargeValueSerializer
protected class	SimpleJpaRepository.Workspace This class provides a logical mapping of UUIDs to nodes within a named workspace.

Field Summary

protected boolean	compressData
protected ExecutionContext	context
protected boolean	creatingWorkspacesAllowed
protected String	dialect
protected javax.persistence.EntityManager	entityManager
protected long	minimumSizeOfLargeValuesInBytes
protected NameFactory	nameFactory
protected Namespaces	namespaceEntities
protected PathFactory	pathFactory
protected Workspaces	workspaceEntities

Fields inherited from class org.modeshape.graph.connector.map.MapRepository

rootNodeUuid

Constructor Summary

SimpleJpaRepository(String sourceName, UUID rootNodeUuid, javax.persistence.EntityManager entityManager, ExecutionContext context, boolean compressData, boolean creatingWorkspacesAllowed, long minimumSizeOfLargeValuesInBytes, String dialect)

SimpleJpaRepository(String sourceName, UUID rootNodeUuid, String defaultWorkspaceName, String[] predefinedWorkspaceNames, javax.persistence.EntityManager entityManager, ExecutionContext context, boolean compressData, boolean creatingWorkspacesAllowed, long minimumSizeOfLargeValuesInBytes, String dialect)

Method Summary

protected boolean	collectGarbage() Collect and remove all records that are no longer needed in the database.
protected MapWorkspace	createWorkspace(ExecutionContext context, String name) Creates a new workspace with the given name containing only a root node.
MapWorkspace	getWorkspace(String name) Returns the workspace with the given name
Set<String>	getWorkspaceNames() Returns a list of the names of the currently created workspaces
MapRepositoryTransaction	startTransaction(boolean readonly) Begin a transaction, hinting whether the transaction will be used only to read the content.

Methods inherited from class org.modeshape.graph.connector.map.MapRepository

createWorkspace, createWorkspace, destroyWorkspace, getDefaultWorkspaceName, getRootNodeUuid, getSourceName, initialize

Methods inherited from class java.lang.Object

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

Field Detail

entityManager

protected final javax.persistence.EntityManager entityManager

workspaceEntities

protected final Workspaces workspaceEntities

namespaceEntities

protected final Namespaces namespaceEntities

context

protected final ExecutionContext context

pathFactory

protected final PathFactory pathFactory

nameFactory

protected final NameFactory nameFactory

compressData

protected final boolean compressData

creatingWorkspacesAllowed

protected final boolean creatingWorkspacesAllowed

minimumSizeOfLargeValuesInBytes

protected final long minimumSizeOfLargeValuesInBytes

dialect

protected final String dialect

Constructor Detail

SimpleJpaRepository

public SimpleJpaRepository(String sourceName,
                           UUID rootNodeUuid,
                           String defaultWorkspaceName,
                           String[] predefinedWorkspaceNames,
                           javax.persistence.EntityManager entityManager,
                           ExecutionContext context,
                           boolean compressData,
                           boolean creatingWorkspacesAllowed,
                           long minimumSizeOfLargeValuesInBytes,
                           String dialect)

SimpleJpaRepository

public SimpleJpaRepository(String sourceName,
                           UUID rootNodeUuid,
                           javax.persistence.EntityManager entityManager,
                           ExecutionContext context,
                           boolean compressData,
                           boolean creatingWorkspacesAllowed,
                           long minimumSizeOfLargeValuesInBytes,
                           String dialect)

Method Detail

createWorkspace

protected MapWorkspace createWorkspace(ExecutionContext context,
                                       String name)

Description copied from class: MapRepository

Creates a new workspace with the given name containing only a root node.

This method does NOT automatically add the newly created workspace to the workspace map or check to see if a workspace already exists in this repository with the same name.

Specified by:

createWorkspace in class MapRepository

Parameters:

context - the context in which the workspace is to be created

name - the name of the workspace

Returns:

the newly created workspace; may not be null

getWorkspace

public MapWorkspace getWorkspace(String name)

Description copied from class: MapRepository

Returns the workspace with the given name

Overrides:

getWorkspace in class MapRepository

Parameters:

name - the name of the workspace to return

Returns:

the workspace with the given name; may be null if no workspace with the given name exists

getWorkspaceNames

public Set<String> getWorkspaceNames()

Description copied from class: MapRepository

Returns a list of the names of the currently created workspaces

Overrides:

getWorkspaceNames in class MapRepository

Returns:

a list of the names of the currently created workspaces

startTransaction

public MapRepositoryTransaction startTransaction(boolean readonly)

Begin a transaction, hinting whether the transaction will be used only to read the content. If this is called, then the transaction must be either committed or rolled back.

Specified by:

startTransaction in class MapRepository

Parameters:

readonly - true if the transaction will not modify any content, or false if changes are to be made

Returns:

the transaction; never null

See Also:

MapRepository.startTransaction(boolean)

collectGarbage

protected boolean collectGarbage()

Collect and remove all records that are no longer needed in the database.

Returns:

true if all unused records could be deleted, or false if some unused records still remain (because removing them all would have been too time consuming or costly).