org.springframework.jdbc.datasource
Class WebSphereDataSourceAdapter

java.lang.Object
  org.springframework.jdbc.datasource.DelegatingDataSource
      org.springframework.jdbc.datasource.UserCredentialsDataSourceAdapter
          org.springframework.jdbc.datasource.IsolationLevelDataSourceAdapter
              org.springframework.jdbc.datasource.WebSphereDataSourceAdapter

All Implemented Interfaces:

Wrapper, CommonDataSource, DataSource, InitializingBean

public class WebSphereDataSourceAdapter
extends IsolationLevelDataSourceAdapter

DataSource 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 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!

Since:

2.0.3

Author:

Juergen Hoeller, Lari Hotari, Ricardo N. Olivieri

See Also:

com.ibm.websphere.rsadapter.JDBCConnectionSpec, com.ibm.websphere.rsadapter.WSDataSource#getConnection(com.ibm.websphere.rsadapter.JDBCConnectionSpec), TransactionSynchronizationManager.getCurrentTransactionIsolationLevel(), TransactionSynchronizationManager.isCurrentTransactionReadOnly()

Field Summary

protected Log

logger

Constructor Summary

WebSphereDataSourceAdapter()
This constructor retrieves the WebSphere JDBC connection spec API, so we can get obtain specific WebSphere Connections using reflection.

Method Summary

void	afterPropertiesSet() Checks that the specified 'targetDataSource' actually is a WebSphere WSDataSource.
protected Object	createConnectionSpec(Integer isolationLevel, Boolean readOnlyFlag, String username, String password) Create a WebSphere JDBCConnectionSpec object for the given charateristics.
protected Connection	doGetConnection(String username, String password) Builds a WebSphere JDBCConnectionSpec object for the current settings and calls WSDataSource.getConnection(JDBCConnectionSpec).

Methods inherited from class org.springframework.jdbc.datasource.IsolationLevelDataSourceAdapter

getCurrentIsolationLevel, getCurrentReadOnlyFlag, getIsolationLevel, setIsolationLevel, setIsolationLevelName

Methods inherited from class org.springframework.jdbc.datasource.UserCredentialsDataSourceAdapter

getConnection, getConnection, removeCredentialsFromCurrentThread, setCredentialsForCurrentThread, setPassword, setUsername

Methods inherited from class org.springframework.jdbc.datasource.DelegatingDataSource

getLoginTimeout, getLogWriter, getTargetDataSource, isWrapperFor, setLoginTimeout, setLogWriter, setTargetDataSource, unwrap

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

WebSphereDataSourceAdapter

public WebSphereDataSourceAdapter()

This constructor retrieves the WebSphere JDBC connection spec API, so we can get obtain specific WebSphere Connections using reflection.

Method Detail

afterPropertiesSet

public void afterPropertiesSet()

Checks that the specified 'targetDataSource' actually is a WebSphere WSDataSource.

Specified by:

afterPropertiesSet in interface InitializingBean

Overrides:

afterPropertiesSet in class DelegatingDataSource

doGetConnection

protected Connection doGetConnection(String username,
                                     String password)
                              throws SQLException

Builds a WebSphere JDBCConnectionSpec object for the current settings and calls WSDataSource.getConnection(JDBCConnectionSpec).

Overrides:

doGetConnection in class IsolationLevelDataSourceAdapter

Parameters:

username - the username to use

password - the password to use

Returns:

the Connection

Throws:

SQLException

See Also:

createConnectionSpec(java.lang.Integer, java.lang.Boolean, java.lang.String, java.lang.String), com.ibm.websphere.rsadapter.WSDataSource#getConnection(com.ibm.websphere.rsadapter.JDBCConnectionSpec)

createConnectionSpec

protected Object createConnectionSpec(Integer isolationLevel,
                                      Boolean readOnlyFlag,
                                      String username,
                                      String password)
                               throws SQLException

Create a WebSphere JDBCConnectionSpec object for the given charateristics.

The default implementation uses reflection to apply the given settings. Can be overridden in subclasses to customize the JDBCConnectionSpec object (JDBCConnectionSpec javadoc; IBM developerWorks article).

Parameters:

isolationLevel - the isolation level to apply (or null if none)

readOnlyFlag - the read-only flag to apply (or null if none)

username - the username to apply (null or empty indicates the default)

password - the password to apply (may be null or empty)

Throws:

SQLException - if thrown by JDBCConnectionSpec API methods

See Also:

com.ibm.websphere.rsadapter.JDBCConnectionSpec