Class StatementFacade.StatementProxy

java.lang.Object

org.apache.tomcat.jdbc.pool.StatementFacade.StatementProxy

All Implemented Interfaces:

InvocationHandler

Enclosing class:

StatementFacade

protected class StatementFacade.StatementProxy
extends Object
implements InvocationHandler

Proxy for a SQL statement. Refuses calls once the borrow that created it has ended, and seals every result set the statement hands back.

Field Summary

Fields

Modifier and Type	Field	Description
protected final Object	connection	The pooled connection the statement was created from, as reported by Statement.getConnection().
protected Object	delegate	The delegated statement, nulled once a close has been forwarded.
protected final String	query	The SQL query text.

Constructor Summary

Constructors

Constructor	Description
StatementProxy(Object parent, String query, Object connection)	Constructs a StatementProxy.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
int	hashCode()
Object	invoke(Object proxy, Method method, Object[] args)
String	toString()

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

delegate

protected volatile Object delegate

The delegated statement, nulled once a close has been forwarded. A handle can be closed from a thread other than the one invoking on it, so the field is read by more threads than the one that nulls it and, like the borrow-ended flag, must be volatile to reach them at all.

query

protected final String query

The SQL query text.

connection

protected final Object connection

The pooled connection the statement was created from, as reported by Statement.getConnection(). It is the handle the application borrowed, so it stops working once that borrow has been returned, while the driver's own connection would have gone on serving whoever borrowed the connection next.

Constructor Details

StatementProxy

public StatementProxy(Object parent,
 String query,
 Object connection)

Constructs a StatementProxy.

Parameters:

parent - the parent statement

query - the SQL query text

connection - the pooled connection the statement was created from

Method Details

invoke

public Object invoke(Object proxy,
 Method method,
 Object[] args)
              throws Throwable

Specified by:

invoke in interface InvocationHandler

Throws:

Throwable

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object