org.springframework.jdbc.datasource

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Java Source Code / Java Documentation » J2EE » spring framework 2.5 » org.springframework.jdbc.datasource 
org.springframework.jdbc.datasource
Provides a utility class for easy DataSource access, a PlatformTransactionManager for a single DataSource, and various simple DataSource implementations.
Java Source File NameTypeComment
AbstractDataSource.javaClass Abstract base class for Spring's javax.sql.DataSource implementations, taking care of the padding.
ConnectionHandle.javaInterface Simple interface to be implemented by handles for a JDBC Connection.
ConnectionHolder.javaClass Connection holder, wrapping a JDBC Connection.
ConnectionProxy.javaInterface Subinterface of java.sql.Connection to be implemented by Connection proxies.
DataSourceTransactionManager.javaClassorg.springframework.transaction.PlatformTransactionManager implementation for a single JDBC javax.sql.DataSource .
DataSourceUtils.javaClass Helper class that provides static methods for obtaining JDBC Connections from a javax.sql.DataSource .
DelegatingDataSource.javaClass JDBC javax.sql.DataSource implementation that delegates all calls to a given target javax.sql.DataSource .
DriverManagerDataSource.javaClass Simple implementation of the standard JDBC DataSource interface, configuring a plain old JDBC Driver via bean properties, and returning a new Connection for every getConnection call.

NOTE: This class is not an actual connection pool; it does not actually pool Connections. It just serves as simple replacement for a full-blown connection pool, implementing the same standard interface, but creating new Connections on every call.

Useful for test or standalone environments outside of a J2EE container, either as a DataSource bean in a corresponding ApplicationContext or in conjunction with a simple JNDI environment.

IsolationLevelDataSourceAdapter.javaClass An adapter for a target javax.sql.DataSource , applying the current Spring transaction's isolation level (and potentially specified user credentials) to every getConnection call.
JdbcTransactionObjectSupport.javaClass Convenient base class for JDBC-aware transaction objects. Can contain a ConnectionHolder , and implements the org.springframework.transaction.SavepointManager interface based on that ConnectionHolder.

Allows for programmatic management of JDBC 3.0 java.sql.Savepoint Savepoints .

LazyConnectionDataSourceProxy.javaClass Proxy for a target DataSource, fetching actual JDBC Connections lazily, i.e.
SimpleConnectionHandle.javaClass Simple implementation of the ConnectionHandle interface, containing a given JDBC Connection.
SingleConnectionDataSource.javaClass Implementation of SmartDataSource that wraps a single Connection which is not closed after use.
SmartDataSource.javaInterface Extension of the javax.sql.DataSource interface, to be implemented by special DataSources that return JDBC Connections in an unwrapped fashion.

Classes using this interface can query whether or not the Connection should be closed after an operation.

TransactionAwareDataSourceProxy.javaClass Proxy for a target JDBC javax.sql.DataSource , adding awareness of Spring-managed transactions.
UserCredentialsDataSourceAdapter.javaClass An adapter for a target JDBC javax.sql.DataSource , applying the specified user credentials to every standard getConnection() call, implicitly invoking getConnection(username, password) on the target. All other methods simply delegate to the corresponding methods of the target DataSource.

Can be used to proxy a target JNDI DataSource that does not have user credentials configured.

WebSphereDataSourceAdapter.javaClassDataSource implementation that delegates all calls to a WebSphere target DataSource , typically obtained from JNDI, applying a current isolation level and/or current user credentials to every Connection obtained from it.

Uses IBM-specific API to get a JDBC Connection with a specific isolation level (and read-only flag) from a WebSphere DataSource (IBM code example). Supports the transaction-specific isolation level exposed by org.springframework.transaction.support.TransactionSynchronizationManager.getCurrentTransactionIsolationLevel . It's also possible to specify a default isolation level, to be applied when the current Spring-managed transaction does not define a specific isolation level.

Usage example, defining the target DataSource as an inner-bean JNDI lookup (of course, you can link to any WebSphere DataSource through a bean reference):

 <bean id="myDataSource" class="org.springframework.jdbc.datasource.WebSphereDataSourceAdapter">
 <property name="targetDataSource">
 <bean class="org.springframework.jndi.JndiObjectFactoryBean">
 <property name="jndiName" value="jdbc/myds"/>
 </bean>
 </property>
 </bean>
Thanks to Ricardo Olivieri for submitting the original implementation of this approach!
author:
   Juergen Hoeller
author:
   Lari Hotari
author:
   Ricardo N.
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