org.springframework.orm.jdo
Class LocalPersistenceManagerFactoryBean

java.lang.Object
  extended byorg.springframework.orm.jdo.LocalPersistenceManagerFactoryBean
All Implemented Interfaces:
DisposableBean, FactoryBean, InitializingBean

public class LocalPersistenceManagerFactoryBean
extends Object
implements FactoryBean, InitializingBean, DisposableBean

FactoryBean that creates a local JDO PersistenceManager instance. Behaves like a PersistenceManagerFactory instance when used as bean reference, e.g. for JdoTemplate's "persistenceManagerFactory" property. Note that switching to a JndiObjectFactoryBean or a bean-style PersistenceManagerFactory instance is just a matter of configuration!

The typical usage will be to register this as singleton factory (for a certain underlying data source) in an application context, and give bean references to application services that need it.

Configuration settings can either be read from a properties file, specified as "configLocation", or completely via this class. Properties specified as "jdoProperties" here will override any settings in a file.

This PersistenceManager handling strategy is most appropriate for applications that solely use JDO for data access. In this case, JdoTransactionManager is much more convenient than setting up your JDO implementation for JTA transactions (which might involve JCA).

As alternative to the properties-driven approach that this FactoryBean offers (which is analogous to using the standard JDOHelper class with a Properties object that is populated with standard JDO properties), you can set up an instance of your PersistenceManagerFactory implementation class directly.

Like a DataSource, a PersistenceManagerFactory is encouraged to support bean-style configuration, which makes it very easy to set up as Spring-managed bean. The implementation class becomes the bean class; the remaining properties are applied as bean properties (starting with lower-case characters, in contrast to the respective JDO properties).

For example, in case of JPOX:

 <bean id="persistenceManagerFactory" class="org.jpox.PersistenceManagerFactoryImpl" destroy-method="close">
   <property name="connectionFactory"><ref bean="dataSource"/></property>
   <property name="nontransactionalRead"><value>true</value></property>
 </bean>
 

Note that such direct setup of a PersistenceManagerFactory implementation is the only way to pass an external connection factory (i.e. a JDBC DataSource) into a JDO instance. With the standard properties-driven approach, you can only use an internal connection pool or a JNDI DataSource.

The "close" method is standardized as of JDO 1.0.1; don't forget to specify it as "destroy-method" for any PersistenceManagerFactory instance. Note that this FactoryBean will automatically invoke "close" for the PersistenceManagerFactory it creates, without any special configuration.

Since:
03.06.2003
Author:
Juergen Hoeller
See Also:
JdoAccessor.setPersistenceManagerFactory(javax.jdo.PersistenceManagerFactory), JdoTransactionManager.setPersistenceManagerFactory(javax.jdo.PersistenceManagerFactory), JndiObjectFactoryBean, JDOHelper.getPersistenceManagerFactory(java.util.Properties), PersistenceManagerFactory.setConnectionFactory(java.lang.Object), PersistenceManagerFactory.close()

Field Summary
protected  Log logger
           
 
Constructor Summary
LocalPersistenceManagerFactoryBean()
           
 
Method Summary
 void afterPropertiesSet()
          Initialize the PersistenceManagerFactory for the given location.
 void destroy()
          Close the PersistenceManagerFactory on context shutdown.
 Object getObject()
          Return the singleton PersistenceManagerFactory.
 Class getObjectType()
          Return the type of object that this FactoryBean creates, or null if not known in advance.
 boolean isSingleton()
          Is the bean managed by this factory a singleton or a prototype?
protected  javax.jdo.PersistenceManagerFactory newPersistenceManagerFactory(Properties props)
          Subclasses can override this to perform custom initialization of the PersistenceManagerFactory instance, creating it via the given Properties that got prepared by this LocalPersistenceManagerFactoryBean The default implementation invokes JDOHelper's getPersistenceManagerFactory.
 void setConfigLocation(Resource configLocation)
          Set the location of the JDO properties config file, for example as classpath resource "classpath:kodo.properties".
 void setJdoProperties(Properties jdoProperties)
          Set JDO properties, like "javax.jdo.PersistenceManagerFactoryClass".
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

logger

protected final Log logger
Constructor Detail

LocalPersistenceManagerFactoryBean

public LocalPersistenceManagerFactoryBean()
Method Detail

setConfigLocation

public void setConfigLocation(Resource configLocation)
Set the location of the JDO properties config file, for example as classpath resource "classpath:kodo.properties".

Note: Can be omitted when all necessary properties are specified locally via this bean.


setJdoProperties

public void setJdoProperties(Properties jdoProperties)
Set JDO properties, like "javax.jdo.PersistenceManagerFactoryClass".

Can be used to override values in a JDO properties config file, or to specify all necessary properties locally.


afterPropertiesSet

public void afterPropertiesSet()
                        throws IllegalArgumentException,
                               IOException,
                               javax.jdo.JDOException
Initialize the PersistenceManagerFactory for the given location.

Specified by:
afterPropertiesSet in interface InitializingBean
Throws:
IllegalArgumentException - in case of illegal property values
IOException - if the properties could not be loaded from the given location
javax.jdo.JDOException - in case of JDO initialization errors

newPersistenceManagerFactory

protected javax.jdo.PersistenceManagerFactory newPersistenceManagerFactory(Properties props)
Subclasses can override this to perform custom initialization of the PersistenceManagerFactory instance, creating it via the given Properties that got prepared by this LocalPersistenceManagerFactoryBean

The default implementation invokes JDOHelper's getPersistenceManagerFactory. A custom implementation could prepare the instance in a specific way, or use a custom PersistenceManagerFactory implementation.

Parameters:
props - Properties prepared by this LocalPersistenceManagerFactoryBean
Returns:
the PersistenceManagerFactory instance
See Also:
JDOHelper.getPersistenceManagerFactory(java.util.Properties)

getObject

public Object getObject()
Return the singleton PersistenceManagerFactory.

Specified by:
getObject in interface FactoryBean
Returns:
an instance of the bean (should never be null)

getObjectType

public Class getObjectType()
Description copied from interface: FactoryBean
Return the type of object that this FactoryBean creates, or null if not known in advance. This allows to check for specific types of beans without instantiating objects, for example on autowiring.

For a singleton, this should try to avoid singleton creation as far as possible; it should rather estimate the type in advance. For prototypes, returning a meaningful type here is advisable too.

This method can be called before this FactoryBean has been fully initialized. It must not rely on state created during initialization; of course, it can still use such state if available.

NOTE: Autowiring will simply ignore FactoryBeans that return null here. Therefore it is highly recommended to implement this method properly, using the current state of the FactoryBean.

Specified by:
getObjectType in interface FactoryBean
Returns:
the type of object that this FactoryBean creates, or null if not known at the time of the call
See Also:
ListableBeanFactory.getBeansOfType(java.lang.Class)

isSingleton

public boolean isSingleton()
Description copied from interface: FactoryBean
Is the bean managed by this factory a singleton or a prototype? That is, will getObject() always return the same object?

The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there.

Specified by:
isSingleton in interface FactoryBean
Returns:
if this bean is a singleton

destroy

public void destroy()
Close the PersistenceManagerFactory on context shutdown.

Specified by:
destroy in interface DisposableBean


Copyright (C) 2003-2004 The Spring Framework Project.