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DelegatingDataSource (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.jdbc.datasource
Class DelegatingDataSource

java.lang.Object
  org.springframework.jdbc.datasource.DelegatingDataSource

All Implemented Interfaces:

Wrapper, CommonDataSource, DataSource, InitializingBean

Direct Known Subclasses:

LazyConnectionDataSourceProxy, TransactionAwareDataSourceProxy, UserCredentialsDataSourceAdapter

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public class DelegatingDataSource
extends Object
implements DataSource, InitializingBean

JDBC DataSource implementation that delegates all calls to a given target DataSource.

This class is meant to be subclassed, with subclasses overriding only those methods (such as getConnection()) that should not simply delegate to the target DataSource.

Since:

1.1

Author:

Juergen Hoeller

See Also:

getConnection()

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Constructor Summary
DelegatingDataSource()           Create a new DelegatingDataSource.
DelegatingDataSource(DataSource targetDataSource)           Create a new DelegatingDataSource.

 

Method Summary
void	afterPropertiesSet()           Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
Connection	getConnection()
Connection	getConnection(String username, String password)
int	getLoginTimeout()
PrintWriter	getLogWriter()
DataSource	getTargetDataSource()           Return the target DataSource that this DataSource should delegate to.
boolean	isWrapperFor(Class iface)
void	setLoginTimeout(int seconds)
void	setLogWriter(PrintWriter out)
void	setTargetDataSource(DataSource targetDataSource)           Set the target DataSource that this DataSource should delegate to.
Object	unwrap(Class iface)

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

DelegatingDataSource

public DelegatingDataSource()

Create a new DelegatingDataSource.

See Also:

setTargetDataSource(javax.sql.DataSource)

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DelegatingDataSource

public DelegatingDataSource(DataSource targetDataSource)

Create a new DelegatingDataSource.

Parameters:

targetDataSource - the target DataSource

Method Detail

setTargetDataSource

public final void setTargetDataSource(DataSource targetDataSource)

Set the target DataSource that this DataSource should delegate to.

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getTargetDataSource

public DataSource getTargetDataSource()

Return the target DataSource that this DataSource should delegate to.

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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

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getConnection

public Connection getConnection()
                         throws SQLException

Specified by:

getConnection in interface DataSource

Throws:

SQLException

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getConnection

public Connection getConnection(String username,
                                String password)
                         throws SQLException

Specified by:

getConnection in interface DataSource

Throws:

SQLException

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getLogWriter

public PrintWriter getLogWriter()
                         throws SQLException

Specified by:

getLogWriter in interface CommonDataSource

Throws:

SQLException

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setLogWriter

public void setLogWriter(PrintWriter out)
                  throws SQLException

Specified by:

setLogWriter in interface CommonDataSource

Throws:

SQLException

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getLoginTimeout

public int getLoginTimeout()
                    throws SQLException

Specified by:

getLoginTimeout in interface CommonDataSource

Throws:

SQLException

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setLoginTimeout

public void setLoginTimeout(int seconds)
                     throws SQLException

Specified by:

setLoginTimeout in interface CommonDataSource

Throws:

SQLException

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unwrap

public Object unwrap(Class iface)
              throws SQLException

Specified by:

unwrap in interface Wrapper

Throws:

SQLException

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isWrapperFor

public boolean isWrapperFor(Class iface)
                     throws SQLException

Specified by:

isWrapperFor in interface Wrapper

Throws:

SQLException

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