org.springframework.orm.jpa.persistenceunit
Class DefaultPersistenceUnitManager

java.lang.Object
  org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager

All Implemented Interfaces:

Aware, InitializingBean, ResourceLoaderAware, LoadTimeWeaverAware, PersistenceUnitManager

public class DefaultPersistenceUnitManager
extends Object
implements PersistenceUnitManager, ResourceLoaderAware, LoadTimeWeaverAware, InitializingBean

Default implementation of the PersistenceUnitManager interface. Used as internal default by LocalContainerEntityManagerFactoryBean.

Supports standard JPA scanning for persistence.xml files, with configurable file locations, JDBC DataSource lookup and load-time weaving.

The default XML file location is classpath*:META-INF/persistence.xml, scanning for all matching files in the class path (as defined in the JPA specification). DataSource names are by default interpreted as JNDI names, and no load time weaving is available (which requires weaving to be turned off in the persistence provider).

Since:

2.0

Author:

Juergen Hoeller

See Also:

setPersistenceXmlLocations(java.lang.String...), setDataSourceLookup(org.springframework.jdbc.datasource.lookup.DataSourceLookup), setLoadTimeWeaver(org.springframework.instrument.classloading.LoadTimeWeaver), LocalContainerEntityManagerFactoryBean.setPersistenceUnitManager(org.springframework.orm.jpa.persistenceunit.PersistenceUnitManager)

Field Summary

static String	DEFAULT_PERSISTENCE_XML_LOCATION Default location of the persistence.xml file: "classpath*:META-INF/persistence.xml".
static String	ORIGINAL_DEFAULT_PERSISTENCE_UNIT_NAME
static String	ORIGINAL_DEFAULT_PERSISTENCE_UNIT_ROOT_LOCATION Default location for the persistence unit root URL: "classpath:", indicating the root of the class path.

Constructor Summary

DefaultPersistenceUnitManager()

Method Summary

void	afterPropertiesSet() Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
DataSourceLookup	getDataSourceLookup() Return the JDBC DataSourceLookup that provides DataSources for the persistence provider, resolving data source names in persistence.xml against Spring-managed DataSource instances.
DataSource	getDefaultDataSource() Return the JDBC DataSource that the JPA persistence provider is supposed to use for accessing the database if none has been specified in persistence.xml.
LoadTimeWeaver	getLoadTimeWeaver() Return the Spring LoadTimeWeaver to use for class instrumentation according to the JPA class transformer contract.
protected MutablePersistenceUnitInfo	getPersistenceUnitInfo(String persistenceUnitName) Return the specified PersistenceUnitInfo from this manager's cache of processed persistence units, keeping it in the cache (i.e.
PersistenceUnitPostProcessor[]	getPersistenceUnitPostProcessors() Return the PersistenceUnitPostProcessors to be applied to each PersistenceUnitInfo that has been parsed by this manager.
protected boolean	isPersistenceUnitOverrideAllowed() Return whether an override of a same-named persistence unit is allowed.
PersistenceUnitInfo	obtainDefaultPersistenceUnitInfo() Obtain the default PersistenceUnitInfo from this manager.
PersistenceUnitInfo	obtainPersistenceUnitInfo(String persistenceUnitName) Obtain the specified PersistenceUnitInfo from this manager.
protected void	postProcessPersistenceUnitInfo(MutablePersistenceUnitInfo pui) Hook method allowing subclasses to customize each PersistenceUnitInfo.
void	preparePersistenceUnitInfos() Prepare the PersistenceUnitInfos according to the configuration of this manager: scanning for persistence.xml files, parsing all matching files, configuring and post-processing them.
void	setDataSourceLookup(DataSourceLookup dataSourceLookup) Specify the JDBC DataSourceLookup that provides DataSources for the persistence provider, resolving data source names in persistence.xml against Spring-managed DataSource instances.
void	setDataSources(Map<String,DataSource> dataSources) Specify the JDBC DataSources that the JPA persistence provider is supposed to use for accessing the database, resolving data source names in persistence.xml against Spring-managed DataSources.
void	setDefaultDataSource(DataSource defaultDataSource) Specify the JDBC DataSource that the JPA persistence provider is supposed to use for accessing the database if none has been specified in persistence.xml.
void	setDefaultPersistenceUnitName(String defaultPersistenceUnitName) Specify the name of the default persistence unit, if any.
void	setDefaultPersistenceUnitRootLocation(String defaultPersistenceUnitRootLocation) Set the default persistence unit root location, to be applied if no unit-specific persistence unit root could be determined.
void	setLoadTimeWeaver(LoadTimeWeaver loadTimeWeaver) Specify the Spring LoadTimeWeaver to use for class instrumentation according to the JPA class transformer contract.
void	setMappingResources(String... mappingResources) Specify one or more mapping resources (equivalent to <mapping-file> entries in persistence.xml) for the default persistence unit.
void	setPackagesToScan(String... packagesToScan) Set whether to use Spring-based scanning for entity classes in the classpath instead of using JPA's standard scanning of jar files with persistence.xml markers in them.
void	setPersistenceUnitPostProcessors(PersistenceUnitPostProcessor... postProcessors) Set the PersistenceUnitPostProcessors to be applied to each PersistenceUnitInfo that has been parsed by this manager.
void	setPersistenceXmlLocation(String persistenceXmlLocation) Specify the location of the persistence.xml files to load.
void	setPersistenceXmlLocations(String... persistenceXmlLocations) Specify multiple locations of persistence.xml files to load.
void	setResourceLoader(ResourceLoader resourceLoader) Set the ResourceLoader that this object runs in.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_PERSISTENCE_XML_LOCATION

public static final String DEFAULT_PERSISTENCE_XML_LOCATION

Default location of the persistence.xml file: "classpath*:META-INF/persistence.xml".

See Also:

Constant Field Values

ORIGINAL_DEFAULT_PERSISTENCE_UNIT_ROOT_LOCATION

public static final String ORIGINAL_DEFAULT_PERSISTENCE_UNIT_ROOT_LOCATION

Default location for the persistence unit root URL: "classpath:", indicating the root of the class path.

See Also:

Constant Field Values

ORIGINAL_DEFAULT_PERSISTENCE_UNIT_NAME

public static final String ORIGINAL_DEFAULT_PERSISTENCE_UNIT_NAME

See Also:

Constant Field Values

Constructor Detail

DefaultPersistenceUnitManager

public DefaultPersistenceUnitManager()

Method Detail

setPersistenceXmlLocation

public void setPersistenceXmlLocation(String persistenceXmlLocation)

Specify the location of the persistence.xml files to load. These can be specified as Spring resource locations and/or location patterns.

Default is "classpath*:META-INF/persistence.xml".

setPersistenceXmlLocations

public void setPersistenceXmlLocations(String... persistenceXmlLocations)

Specify multiple locations of persistence.xml files to load. These can be specified as Spring resource locations and/or location patterns.

Default is "classpath*:META-INF/persistence.xml".

Parameters:

persistenceXmlLocations - an array of Spring resource Strings identifying the location of the persistence.xml files to read

setDefaultPersistenceUnitRootLocation

public void setDefaultPersistenceUnitRootLocation(String defaultPersistenceUnitRootLocation)

Set the default persistence unit root location, to be applied if no unit-specific persistence unit root could be determined.

Default is "classpath:", that is, the root of the current class path (nearest root directory). To be overridden if unit-specific resolution does not work and the class path root is not appropriate either.

setDefaultPersistenceUnitName

public void setDefaultPersistenceUnitName(String defaultPersistenceUnitName)

Specify the name of the default persistence unit, if any. Default is "default".

Primarily applied to a scanned persistence unit without persistence.xml. Also applicable to selecting a default unit from several persistence units available.

See Also:

setPackagesToScan(java.lang.String...), obtainDefaultPersistenceUnitInfo()

setPackagesToScan

public void setPackagesToScan(String... packagesToScan)

Set whether to use Spring-based scanning for entity classes in the classpath instead of using JPA's standard scanning of jar files with persistence.xml markers in them. In case of Spring-based scanning, no persistence.xml is necessary; all you need to do is to specify base packages to search here.

Default is none. Specify packages to search for autodetection of your entity classes in the classpath. This is analogous to Spring's component-scan feature (ClassPathBeanDefinitionScanner).

setMappingResources

public void setMappingResources(String... mappingResources)

Specify one or more mapping resources (equivalent to <mapping-file> entries in persistence.xml) for the default persistence unit. Can be used on its own or in combination with entity scanning in the classpath, in both cases avoiding persistence.xml.

Note that mapping resources must be relative to the classpath root, e.g. "META-INF/mappings.xml" or "com/mycompany/repository/mappings.xml", so that they can be loaded through ClassLoader.getResource.

See Also:

setPackagesToScan(java.lang.String...)

setDataSources

public void setDataSources(Map<String,DataSource> dataSources)

Specify the JDBC DataSources that the JPA persistence provider is supposed to use for accessing the database, resolving data source names in persistence.xml against Spring-managed DataSources.

The specified Map needs to define data source names for specific DataSource objects, matching the data source names used in persistence.xml. If not specified, data source names will be resolved as JNDI names instead (as defined by standard JPA).

See Also:

MapDataSourceLookup

setDataSourceLookup

public void setDataSourceLookup(DataSourceLookup dataSourceLookup)

Specify the JDBC DataSourceLookup that provides DataSources for the persistence provider, resolving data source names in persistence.xml against Spring-managed DataSource instances.

Default is JndiDataSourceLookup, which resolves DataSource names as JNDI names (as defined by standard JPA). Specify a BeanFactoryDataSourceLookup instance if you want DataSource names to be resolved against Spring bean names.

Alternatively, consider passing in a map from names to DataSource instances via the "dataSources" property. If the persistence.xml file does not define DataSource names at all, specify a default DataSource via the "defaultDataSource" property.

See Also:

JndiDataSourceLookup, BeanFactoryDataSourceLookup, setDataSources(java.util.Map), setDefaultDataSource(javax.sql.DataSource)

getDataSourceLookup

public DataSourceLookup getDataSourceLookup()

Return the JDBC DataSourceLookup that provides DataSources for the persistence provider, resolving data source names in persistence.xml against Spring-managed DataSource instances.

setDefaultDataSource

public void setDefaultDataSource(DataSource defaultDataSource)

Specify the JDBC DataSource that the JPA persistence provider is supposed to use for accessing the database if none has been specified in persistence.xml.

In JPA speak, a DataSource passed in here will be uses as "nonJtaDataSource" on the PersistenceUnitInfo passed to the PersistenceProvider, provided that none has been registered before.

See Also:

PersistenceUnitInfo.getNonJtaDataSource()

getDefaultDataSource

public DataSource getDefaultDataSource()

Return the JDBC DataSource that the JPA persistence provider is supposed to use for accessing the database if none has been specified in persistence.xml.

setPersistenceUnitPostProcessors

public void setPersistenceUnitPostProcessors(PersistenceUnitPostProcessor... postProcessors)

Set the PersistenceUnitPostProcessors to be applied to each PersistenceUnitInfo that has been parsed by this manager.

Such post-processors can, for example, register further entity classes and jar files, in addition to the metadata read in from persistence.xml.

getPersistenceUnitPostProcessors

public PersistenceUnitPostProcessor[] getPersistenceUnitPostProcessors()

Return the PersistenceUnitPostProcessors to be applied to each PersistenceUnitInfo that has been parsed by this manager.

setLoadTimeWeaver

public void setLoadTimeWeaver(LoadTimeWeaver loadTimeWeaver)

Specify the Spring LoadTimeWeaver to use for class instrumentation according to the JPA class transformer contract.

It is not required to specify a LoadTimeWeaver: Most providers will be able to provide a subset of their functionality without class instrumentation as well, or operate with their VM agent specified on JVM startup.

In terms of Spring-provided weaving options, the most important ones are InstrumentationLoadTimeWeaver, which requires a Spring-specific (but very general) VM agent specified on JVM startup, and ReflectiveLoadTimeWeaver, which interacts with an underlying ClassLoader based on specific extended methods being available on it (for example, interacting with Spring's TomcatInstrumentableClassLoader).

NOTE: As of Spring 2.5, the context's default LoadTimeWeaver (defined as bean with name "loadTimeWeaver") will be picked up automatically, if available, removing the need for LoadTimeWeaver configuration on each affected target bean. Consider using the context:load-time-weaver XML tag for creating such a shared LoadTimeWeaver (autodetecting the environment by default).

Specified by:

setLoadTimeWeaver in interface LoadTimeWeaverAware

Parameters:

loadTimeWeaver - the LoadTimeWeaver instance (never null)

See Also:

InstrumentationLoadTimeWeaver, ReflectiveLoadTimeWeaver, TomcatInstrumentableClassLoader

getLoadTimeWeaver

public LoadTimeWeaver getLoadTimeWeaver()

Return the Spring LoadTimeWeaver to use for class instrumentation according to the JPA class transformer contract.

setResourceLoader

public void setResourceLoader(ResourceLoader resourceLoader)

Description copied from interface: ResourceLoaderAware

Set the ResourceLoader that this object runs in.

This might be a ResourcePatternResolver, which can be checked through instanceof ResourcePatternResolver. See also the ResourcePatternUtils.getResourcePatternResolver method.

Invoked after population of normal bean properties but before an init callback like InitializingBean's afterPropertiesSet or a custom init-method. Invoked before ApplicationContextAware's setApplicationContext.

Specified by:

setResourceLoader in interface ResourceLoaderAware

Parameters:

resourceLoader - ResourceLoader object to be used by this object

See Also:

ResourcePatternResolver, ResourcePatternUtils.getResourcePatternResolver(org.springframework.core.io.ResourceLoader)

afterPropertiesSet

public void afterPropertiesSet()

Description copied from interface: InitializingBean

Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).

This method allows the bean instance to perform initialization only possible when all bean properties have been set and to throw an exception in the event of misconfiguration.

Specified by:

afterPropertiesSet in interface InitializingBean

preparePersistenceUnitInfos

public void preparePersistenceUnitInfos()

Prepare the PersistenceUnitInfos according to the configuration of this manager: scanning for persistence.xml files, parsing all matching files, configuring and post-processing them.

PersistenceUnitInfos cannot be obtained before this preparation method has been invoked.

See Also:

obtainDefaultPersistenceUnitInfo(), obtainPersistenceUnitInfo(String)

getPersistenceUnitInfo

protected final MutablePersistenceUnitInfo getPersistenceUnitInfo(String persistenceUnitName)

Return the specified PersistenceUnitInfo from this manager's cache of processed persistence units, keeping it in the cache (i.e. not 'obtaining' it for use but rather just accessing it for post-processing).

This can be used in postProcessPersistenceUnitInfo(org.springframework.orm.jpa.persistenceunit.MutablePersistenceUnitInfo) implementations, detecting existing persistence units of the same name and potentially merging them.

Parameters:

persistenceUnitName - the name of the desired persistence unit

Returns:

the PersistenceUnitInfo in mutable form, or null if not available

postProcessPersistenceUnitInfo

protected void postProcessPersistenceUnitInfo(MutablePersistenceUnitInfo pui)

Hook method allowing subclasses to customize each PersistenceUnitInfo.

The default implementation delegates to all registered PersistenceUnitPostProcessors. It is usually preferable to register further entity classes, jar files etc there rather than in a subclass of this manager, to be able to reuse the post-processors.

Parameters:

pui - the chosen PersistenceUnitInfo, as read from persistence.xml. Passed in as MutablePersistenceUnitInfo.

See Also:

setPersistenceUnitPostProcessors(org.springframework.orm.jpa.persistenceunit.PersistenceUnitPostProcessor...)

isPersistenceUnitOverrideAllowed

protected boolean isPersistenceUnitOverrideAllowed()

Return whether an override of a same-named persistence unit is allowed.

Default is false. May be overridden to return true, for example if postProcessPersistenceUnitInfo(org.springframework.orm.jpa.persistenceunit.MutablePersistenceUnitInfo) is able to handle that case.

obtainDefaultPersistenceUnitInfo

public PersistenceUnitInfo obtainDefaultPersistenceUnitInfo()

Description copied from interface: PersistenceUnitManager

Obtain the default PersistenceUnitInfo from this manager.

Specified by:

obtainDefaultPersistenceUnitInfo in interface PersistenceUnitManager

Returns:

the PersistenceUnitInfo (never null)

obtainPersistenceUnitInfo

public PersistenceUnitInfo obtainPersistenceUnitInfo(String persistenceUnitName)

Description copied from interface: PersistenceUnitManager

Obtain the specified PersistenceUnitInfo from this manager.

Specified by:

obtainPersistenceUnitInfo in interface PersistenceUnitManager

Parameters:

persistenceUnitName - the name of the desired persistence unit

Returns:

the PersistenceUnitInfo (never null)