Package org.apache.tomcat.jdbc.pool

Class ProxyConnection

java.lang.Object

org.apache.tomcat.jdbc.pool.JdbcInterceptor

org.apache.tomcat.jdbc.pool.ProxyConnection

All Implemented Interfaces:

InvocationHandler

public class ProxyConnection
extends JdbcInterceptor

A ProxyConnection object is the bottom most interceptor that wraps an object of type PooledConnection. The ProxyConnection intercepts three methods:

• Connection.close() - returns the connection to the pool. May be called multiple times.
• Object.toString() - returns a custom string for this object
• PooledConnection.getConnection() - returns the underlying connection

By default method comparisons is done on a String reference level, unless the PoolConfiguration.setUseEquals(boolean) has been called with a true argument.

Field Summary

Fields

Modifier and Type	Field	Description
protected PooledConnection	connection
protected ConnectionPool	pool

Fields inherited from class org.apache.tomcat.jdbc.pool.JdbcInterceptor

CLOSE_VAL, EQUALS_VAL, GETCONNECTION_VAL, HASHCODE_VAL, ISCLOSED_VAL, ISVALID_VAL, ISWRAPPERFOR_VAL, properties, TOSTRING_VAL, UNWRAP_VAL

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ProxyConnection(ConnectionPool parent, PooledConnection con, boolean useEquals)

Method Summary

Modifier and Type	Method	Description
PooledConnection	getConnection()
PooledConnection	getDelegateConnection()
ConnectionPool	getParentPool()
ConnectionPool	getPool()
Object	invoke(Object proxy, Method method, Object[] args)	Gets invoked each time an operation on Connection is invoked.
boolean	isClosed()
boolean	isWrapperFor(Class<?> iface)
void	reset(ConnectionPool parent, PooledConnection con)	Gets called each time the connection is borrowed from the pool This means that if an interceptor holds a reference to the connection the interceptor can be reused for another connection.
void	setConnection(PooledConnection connection)
void	setPool(ConnectionPool pool)
String	toString()
Object	unwrap(Class<?> iface)

Methods inherited from class org.apache.tomcat.jdbc.pool.JdbcInterceptor

compare, compare, disconnected, getNext, getProperties, isUseEquals, poolClosed, poolStarted, setNext, setProperties, setUseEquals

Methods inherited from class java.lang.Object

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

Field Details

connection

protected PooledConnection connection

pool

protected ConnectionPool pool

Constructor Details

ProxyConnection

protected ProxyConnection(ConnectionPool parent,
 PooledConnection con,
 boolean useEquals)

Method Details

getConnection

public PooledConnection getConnection()

setConnection

public void setConnection(PooledConnection connection)

getPool

public ConnectionPool getPool()

setPool

public void setPool(ConnectionPool pool)

reset

public void reset(ConnectionPool parent,
 PooledConnection con)

Description copied from class: JdbcInterceptor

Gets called each time the connection is borrowed from the pool This means that if an interceptor holds a reference to the connection the interceptor can be reused for another connection.
This method may be called with null as both arguments when we are closing down the connection.

Specified by:

reset in class JdbcInterceptor

Parameters:

parent - - the connection pool owning the connection

con - - the pooled connection

isWrapperFor

public boolean isWrapperFor(Class<?> iface)

unwrap

public Object unwrap(Class<?> iface)
              throws SQLException

Throws:

SQLException

invoke

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

Description copied from class: JdbcInterceptor

Gets invoked each time an operation on Connection is invoked.

Specified by:

invoke in interface InvocationHandler

Overrides:

invoke in class JdbcInterceptor

Throws:

Throwable

isClosed

public boolean isClosed()

getDelegateConnection

public PooledConnection getDelegateConnection()

getParentPool

public ConnectionPool getParentPool()

toString

public String toString()

Overrides:

toString in class Object