Class ProxyConnection

java.lang.Object

clazzfish.jdbc.ProxyConnection

All Implemented Interfaces:

InvocationHandler

public class ProxyConnection
extends Object
implements InvocationHandler

This is a dynamic proxy for a JDBC connection which monitors together with the ConnectionMonitor the different newInstance() and close() call.

Note: This class was moved in 2018 from the PatternTesting project to here.

Since:

0.9

Author:

oliver (ob@aosd.de)

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ProxyConnection(Connection connection)	Instantiates a new proxy connection.

Method Summary

Modifier and Type	Method	Description
StackTraceElement[]	getCaller()	Gets the stacktrace of the caller.
Connection	getConnection()	Gets the wrapped connection.
Object	invoke(Object proxy, Method method, Object[] args)	Invokes the orginal Connection method and puts a wrapper around Statement and PreparedStatement to support monitoring.
static Connection	newInstance(Connection connection)	Creates a new proxy instance for the given connection.
String	toString()	To string.

Methods inherited from class java.lang.Object

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

Constructor Details

ProxyConnection

protected ProxyConnection(Connection connection)

Instantiates a new proxy connection. This constructor is called from newInstance(Connection) which is of no interest for us. We want to store the real caller so we ignore the ProxyConnection class but also the ProxyDriver class (ProxyDriver also calls this constructor indirectly) and other classes.

Parameters:

connection - the connection where this class acts as proxy

Method Details

newInstance

public static Connection newInstance(Connection connection)

Creates a new proxy instance for the given connection.

Parameters:

connection - the connection

Returns:

the connection

invoke

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

Invokes the orginal Connection method and puts a wrapper around Statement and PreparedStatement to support monitoring.

TODO: CallableStatement is not yet wrapped.

Specified by:

invoke in interface InvocationHandler

Parameters:

proxy - the proxy

method - the method

args - the args

Returns:

the object

Throws:

Throwable - the throwable

See Also:

• InvocationHandler.invoke(Object, Method, Object[])

getConnection

public Connection getConnection()

Gets the wrapped connection.

Returns:

the connection

getCaller

public StackTraceElement[] getCaller()

Gets the stacktrace of the caller.

Returns:

the caller stacktrace

toString

public String toString()

To string.

Overrides:

toString in class Object

Returns:

the string

See Also:

• Object.toString()