java.lang.Object | ||
↳ | org.springframework.orm.jdo.JdoAccessor | |
↳ | org.springframework.orm.jdo.JdoInterceptor |
This interceptor binds a new JDO PersistenceManager to the thread before a method call, closing and removing it afterwards in case of any method outcome. If there already is a pre-bound PersistenceManager (e.g. from JdoTransactionManager, or from a surrounding JDO-intercepted method), the interceptor simply participates in it.
Application code must retrieve a JDO PersistenceManager via the
PersistenceManagerFactoryUtils.getPersistenceManager
method,
to be able to detect a thread-bound PersistenceManager. It is preferable to use
getPersistenceManager
with allowCreate=false, if the code relies on
the interceptor to provide proper PersistenceManager handling. Typically, the code
will look like as follows:
public void doSomeDataAccessAction() { PersistenceManager pm = PersistenceManagerFactoryUtils.getPersistenceManager(this.pmf, false); ... }
Note that this interceptor automatically translates JDOExceptions, via
delegating to the PersistenceManagerFactoryUtils.convertJdoAccessException
method that converts them to exceptions that are compatible with the
org.springframework.dao
exception hierarchy (like JdoTemplate does).
This can be turned off if the raw exceptions are preferred.
This class can be considered a declarative alternative to JdoTemplate's callback approach. The advantages are:
The drawback is the dependency on interceptor configuration. However, note that this interceptor is usually not necessary in scenarios where the data access code always executes within transactions. A transaction will always have a thread-bound PersistenceManager in the first place, so adding this interceptor to the configuration just adds value when fine-tuning PersistenceManager settings like the flush mode - or when relying on exception translation.
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Inherited Fields | |||||||||||
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From class
org.springframework.orm.jdo.JdoAccessor
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Public Constructors | |||||||||||
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Public Methods | |||||||||||
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Set whether to convert any JDOException raised to a Spring DataAccessException,
compatible with the
org.springframework.dao exception hierarchy. |
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Inherited Methods | |||||||||||
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From class
org.springframework.orm.jdo.JdoAccessor
| |||||||||||
From class
java.lang.Object
| |||||||||||
From interface
org.springframework.beans.factory.InitializingBean
|
Set whether to convert any JDOException raised to a Spring DataAccessException,
compatible with the org.springframework.dao
exception hierarchy.
Default is "true". Turn this flag off to let the caller receive raw exceptions as-is, without any wrapping.