customplugins

Class MethodCountConnectionPlugin

java.lang.Object

customplugins.MethodCountConnectionPlugin

All Implemented Interfaces:

IConnectionPlugin, ITransactionContextHandler

public class MethodCountConnectionPlugin
extends java.lang.Object
implements IConnectionPlugin

This connection plugin counts the total number of executed JDBC methods throughout the lifespan of the current connection.

All connection plugins must implement the IConnectionPlugin interface. Since all the connection plugins are chained together, the prior connection plugin needs to invoke the next plugin. Once registered, every connection will create an instance of this connection plugin.

Constructor Summary

Constructors

Constructor and Description
MethodCountConnectionPlugin(IConnectionPlugin nextPlugin, Log logger)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	execute(java.lang.Class<?> methodInvokeOn, java.lang.String methodName, java.util.concurrent.Callable<?> executeJdbcMethod, java.lang.Object[] args) All method calls related to the connection object will be passed to this method as Callable<?> executeJdbcMethod.
void	openInitialConnection(ConnectionUrl connectionUrl)
void	releaseResources() This method is called when the connection closes.
void	transactionBegun() Called when the driver has been told by the server that a transaction is now in progress (when one has not been currently in progress).
void	transactionCompleted() Called when the driver has been told by the server that a transaction has completed, and no transaction is currently in progress.

Methods inherited from class java.lang.Object

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

Constructor Detail

MethodCountConnectionPlugin

public MethodCountConnectionPlugin(IConnectionPlugin nextPlugin,
                                   Log logger)

Method Detail

execute

public java.lang.Object execute(java.lang.Class<?> methodInvokeOn,
                                java.lang.String methodName,
                                java.util.concurrent.Callable<?> executeJdbcMethod,
                                java.lang.Object[] args)
                         throws java.lang.Exception

All method calls related to the connection object will be passed to this method as Callable<?> executeJdbcMethod. This includes methods that may be called frequently, such as:

• ResultSet.next()
• ResultSet.getString(int)

Specified by:

execute in interface IConnectionPlugin

Throws:

java.lang.Exception

transactionBegun

public void transactionBegun()

Description copied from interface: ITransactionContextHandler

Called when the driver has been told by the server that a transaction is now in progress (when one has not been currently in progress).

Specified by:

transactionBegun in interface ITransactionContextHandler

transactionCompleted

public void transactionCompleted()

Description copied from interface: ITransactionContextHandler

Called when the driver has been told by the server that a transaction has completed, and no transaction is currently in progress.

Specified by:

transactionCompleted in interface ITransactionContextHandler

openInitialConnection

public void openInitialConnection(ConnectionUrl connectionUrl)
                           throws java.sql.SQLException

Specified by:

openInitialConnection in interface IConnectionPlugin

Throws:

java.sql.SQLException

releaseResources

public void releaseResources()

This method is called when the connection closes. If this connection plugin has any background threads this is the time to clean up these dangling resources. However, you can also perform other steps you wish before closing the plugin. This sample outputs all the aggregated information during this step.

Specified by:

releaseResources in interface IConnectionPlugin