ConnectionSpecConnectionFactoryAdapter (Spring Framework) - Spring Framework 1.2.9 API 文档英文版

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org.springframework.jca.cci.connection
Class ConnectionSpecConnectionFactoryAdapter

java.lang.Object
  org.springframework.jca.cci.connection.DelegatingConnectionFactory
      org.springframework.jca.cci.connection.ConnectionSpecConnectionFactoryAdapter

All Implemented Interfaces:: Serializable, Referenceable, ConnectionFactory, InitializingBean

public class ConnectionSpecConnectionFactoryAdapter
extends DelegatingConnectionFactory
extends DelegatingConnectionFactory

An adapter for a target ConnectionFacory, applying the given ConnectionSpec to every standard getConnection() call, that is, implicitly invoking getConnection(ConnectionSpec) on the target. All other methods simply delegate to the corresponding methods of the target ConnectionFactory.

Can be used to proxy a target JNDI ConnectionFactory that does not have a ConnectionSpec configured. Client code can work with the ConnectionFactory without passing in a ConnectionSpec on every getConnection() call.

In the following example, client code can simply transparently work with the preconfigured "myConnectionFactory", implicitly accessing "myTargetConnectionFactory" with the specified user credentials.

 <bean id="myTargetConnectionFactory" class="org.springframework.jndi.JndiObjectFactoryBean">
   <property name="jndiName"><value>java:comp/env/cci/mycf</value></property>
 </bean>

 <bean id="myConnectionFactory" class="org.springframework.jca.cci.connection.ConnectionSpecConnectionFactoryAdapter">
   <property name="targetConnectionFactory"><ref bean="myTargetConnectionFactory"/></property>
   <property name="connectionSpec">
     <bean class="your.resource.adapter.ConnectionSpecImpl">
       <property name="username"><value>myusername</value></property>
       <property name="password"><value>mypassword</value></property>
     </bean>
   </property>
 </bean>

If the "connectionSpec" is empty, this proxy will simply delegate to the standard getConnection() method of the target ConnectionFactory. This can be used to keep a UserCredentialsConnectionFactoryAdapter bean definition just for the option of implicitly passing in a ConnectionSpec if a particular target ConnectionFactory requires it.

Since:: 1.2
Author:: Juergen Hoeller
See Also:: getConnection(), Serialized Form

Constructor Summary

ConnectionSpecConnectionFactoryAdapter()


Method Summary

protected Connection doGetConnection(ConnectionSpec spec)
          This implementation delegates to the getConnection(ConnectionSpec) method of the target ConnectionFactory, passing in the specified user credentials.

Connection getConnection()
          Determine whether there is currently a thread-bound ConnectionSpec, using it if available, falling back to the statically specified "connectionSpec" property else.

void removeConnectionSpecFromCurrentThread()
          Remove any ConnectionSpec for this proxy from the current thread.

void setConnectionSpec(ConnectionSpec connectionSpec)
          Set the ConnectionSpec that this adapter should use for retrieving Connections.

void setConnectionSpecForCurrentThread(ConnectionSpec spec)
          Set a ConnectionSpec for this proxy and the current thread.

Methods inherited from class org.springframework.jca.cci.connection.DelegatingConnectionFactory

afterPropertiesSet, getConnection, getMetaData, getRecordFactory, getReference, getTargetConnectionFactory, setReference, setTargetConnectionFactory

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Summary
`ConnectionSpecConnectionFactoryAdapter()`

Method Summary
`protected Connection`	`doGetConnection(ConnectionSpec spec)` This implementation delegates to the `getConnection(ConnectionSpec)` method of the target ConnectionFactory, passing in the specified user credentials.
`Connection`	`getConnection()` Determine whether there is currently a thread-bound ConnectionSpec, using it if available, falling back to the statically specified "connectionSpec" property else.
`void`	`removeConnectionSpecFromCurrentThread()` Remove any ConnectionSpec for this proxy from the current thread.
`void`	`setConnectionSpec(ConnectionSpec connectionSpec)` Set the ConnectionSpec that this adapter should use for retrieving Connections.
`void`	`setConnectionSpecForCurrentThread(ConnectionSpec spec)` Set a ConnectionSpec for this proxy and the current thread.

Methods inherited from class org.springframework.jca.cci.connection.DelegatingConnectionFactory
`afterPropertiesSet, getConnection, getMetaData, getRecordFactory, getReference, getTargetConnectionFactory, setReference, setTargetConnectionFactory`

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

Constructor Detail

ConnectionSpecConnectionFactoryAdapter

public ConnectionSpecConnectionFactoryAdapter()

Method Detail

setConnectionSpec

public void setConnectionSpec(ConnectionSpec connectionSpec)

Set the ConnectionSpec that this adapter should use for retrieving Connections. Default is none.

setConnectionSpecForCurrentThread

public void setConnectionSpecForCurrentThread(ConnectionSpec spec)

Set a ConnectionSpec for this proxy and the current thread. The given ConnectionSpec will be applied to all subsequent getConnection() calls on this ConnectionFactory proxy.

This will override any statically specified "connectionSpec" property.

Parameters:: spec - the ConnectionSpec to apply
See Also:: removeConnectionSpecFromCurrentThread()

removeConnectionSpecFromCurrentThread

public void removeConnectionSpecFromCurrentThread()

Remove any ConnectionSpec for this proxy from the current thread. A statically specified ConnectionSpec applies again afterwards.

See Also:: setConnectionSpecForCurrentThread(javax.resource.cci.ConnectionSpec)

getConnection

public final Connection getConnection()
                               throws ResourceException

Determine whether there is currently a thread-bound ConnectionSpec, using it if available, falling back to the statically specified "connectionSpec" property else.

Specified by:: getConnection in interface ConnectionFactory
Overrides:: getConnection in class DelegatingConnectionFactory

Throws:: ResourceException
See Also:: doGetConnection(javax.resource.cci.ConnectionSpec)

doGetConnection

protected Connection doGetConnection(ConnectionSpec spec)
                              throws ResourceException

This implementation delegates to the getConnection(ConnectionSpec) method of the target ConnectionFactory, passing in the specified user credentials. If the specified username is empty, it will simply delegate to the standard getConnection() method of the target ConnectionFactory.

Parameters:: spec - the ConnectionSpec to apply
Returns:: the Connection
Throws:: ResourceException
See Also:: ConnectionFactory.getConnection(javax.resource.cci.ConnectionSpec), ConnectionFactory.getConnection()