Package cz.cvut.kbss.jopa.sessions

Class ServerSession

java.lang.Object

cz.cvut.kbss.jopa.sessions.AbstractSession

cz.cvut.kbss.jopa.sessions.ServerSession

All Implemented Interfaces:

ConfigurationHolder, MetamodelProvider, Wrapper

public class ServerSession
extends AbstractSession
implements Wrapper

The ServerSession is the primary interface for accessing the ontology.

It manages an accessor object, which performs the queries.

Field Summary

Fields inherited from class cz.cvut.kbss.jopa.sessions.AbstractSession

configuration

Constructor Summary

Constructors

Constructor	Description
ServerSession(OntologyStorageProperties storageProperties, Configuration configuration, MetamodelImpl metamodel)

Method Summary

Modifier and Type	Method	Description
protected ConnectionWrapper	acquireConnection()	Acquires connection to the underlying ontology storage.
UnitOfWork	acquireUnitOfWork(Configuration configuration)	Acquires a UnitOfWork instance to perform transactional operations.
void	close()	Close the server session and all connections to the underlying data source.
CriteriaBuilder	getCriteriaBuilder()	Gets a CriteriaBuilder instance for building Criteria API queries.
CacheManager	getLiveObjectCache()	Get the current live object cache.
MetamodelImpl	getMetamodel()	Gets the metamodel
boolean	isEntityType(Class<?> cls)	Checks whether the specified class is an entity type.
void	transactionFinished(EntityTransaction t)
void	transactionStarted(EntityTransaction t, AbstractEntityManager em)
<T> T	unwrap(Class<T> cls)	Unwraps implementation of the specified class.

Methods inherited from class cz.cvut.kbss.jopa.sessions.AbstractSession

getConfiguration

Methods inherited from class java.lang.Object

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

Methods inherited from interface cz.cvut.kbss.jopa.sessions.MetamodelProvider

getNamedQueryManager, getResultSetMappingManager

Constructor Details

ServerSession

public ServerSession(OntologyStorageProperties storageProperties,
 Configuration configuration,
 MetamodelImpl metamodel)

Method Details

acquireUnitOfWork

public UnitOfWork acquireUnitOfWork(Configuration configuration)

Acquires a UnitOfWork instance to perform transactional operations.

Returns:

UnitOfWork instance

acquireConnection

protected ConnectionWrapper acquireConnection()

Description copied from class: AbstractSession

Acquires connection to the underlying ontology storage.

Specified by:

acquireConnection in class AbstractSession

Returns:

Connection

getLiveObjectCache

public CacheManager getLiveObjectCache()

Description copied from class: AbstractSession

Get the current live object cache.

This manager represents the second level cache.

Specified by:

getLiveObjectCache in class AbstractSession

Returns:

Second level cache manager

transactionStarted

public void transactionStarted(EntityTransaction t,
 AbstractEntityManager em)

transactionFinished

public void transactionFinished(EntityTransaction t)

close

public void close()

Close the server session and all connections to the underlying data source.

getMetamodel

public MetamodelImpl getMetamodel()

Description copied from interface: MetamodelProvider

Gets the metamodel

Specified by:

getMetamodel in interface MetamodelProvider

Returns:

Metamodel

isEntityType

public boolean isEntityType(Class<?> cls)

Description copied from interface: MetamodelProvider

Checks whether the specified class is an entity type.

Specified by:

isEntityType in interface MetamodelProvider

Parameters:

cls - The class to check

Returns:

Whether type is managed

getCriteriaBuilder

public CriteriaBuilder getCriteriaBuilder()

Description copied from class: AbstractSession

Gets a CriteriaBuilder instance for building Criteria API queries.

Specified by:

getCriteriaBuilder in class AbstractSession

Returns:

Criteria query builder

unwrap

public <T> T unwrap(Class<T> cls)

Description copied from interface: Wrapper

Unwraps implementation of the specified class.

Specified by:

unwrap in interface Wrapper

Parameters:

cls - The class of the object to be returned

Returns:

An instance of the specified class