org.objectweb.cjdbc.driver.connectpolicy
Class RandomConnectPolicy

java.lang.Object
  org.objectweb.cjdbc.driver.connectpolicy.AbstractControllerConnectPolicy
      org.objectweb.cjdbc.driver.connectpolicy.RandomConnectPolicy

public class RandomConnectPolicy

extends AbstractControllerConnectPolicy

This class defines a RandomConnectPolicy used when the C-JDBC URL has the following form: jdbc:cjdbc://node1,node2,node3/myDB?preferredController=random

Version:

1.0

Author:

Emmanuel Cecchet

Field Summary

private java.util.ArrayList	availableControllerList
private java.util.Random	rand

Fields inherited from class org.objectweb.cjdbc.driver.connectpolicy.AbstractControllerConnectPolicy

controllerList, debugLevel, suspectedControllers

Constructor Summary

RandomConnectPolicy(ControllerInfo[] controllerList, long retryIntervalInMs, int debugLevel)
Creates a new RandomConnectPolicy object

Method Summary

ControllerInfo	getController() Get a controller using the implementation specific policy
void	removeControllerFromSuspectList(ControllerInfo controller) Remove the specified controller from the list of suspect controllers
void	suspectControllerOfFailure(ControllerInfo controllerInfo) Add the controller to the list of suspects.

Methods inherited from class org.objectweb.cjdbc.driver.connectpolicy.AbstractControllerConnectPolicy

finalize, getControllerList, getSuspectedControllers, isSuspectedOfFailure, setControllerList

Methods inherited from class java.lang.Object

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

Field Detail

rand

private java.util.Random rand

availableControllerList

private java.util.ArrayList availableControllerList

Constructor Detail

RandomConnectPolicy

public RandomConnectPolicy(ControllerInfo[] controllerList,
                           long retryIntervalInMs,
                           int debugLevel)

Creates a new RandomConnectPolicy object

Parameters:

controllerList - list of controller from C-JDBC url

retryIntervalInMs - Interval in milliseconds before retrying to re-connect to a controller that has failed

debugLevel - the debug level to use

See Also:

CjdbcUrl.DEBUG_LEVEL_OFF

Method Detail

removeControllerFromSuspectList

public void removeControllerFromSuspectList(ControllerInfo controller)

Description copied from class: AbstractControllerConnectPolicy

Remove the specified controller from the list of suspect controllers

Overrides:

removeControllerFromSuspectList in class AbstractControllerConnectPolicy

Parameters:

controller - the controller to remove from the list

See Also:

AbstractControllerConnectPolicy.removeControllerFromSuspectList(org.objectweb.cjdbc.driver.ControllerInfo)

suspectControllerOfFailure

public void suspectControllerOfFailure(ControllerInfo controllerInfo)

Description copied from class: AbstractControllerConnectPolicy

Add the controller to the list of suspects.

Overrides:

suspectControllerOfFailure in class AbstractControllerConnectPolicy

Parameters:

controllerInfo - the controller suspected of failure

See Also:

AbstractControllerConnectPolicy.suspectControllerOfFailure(org.objectweb.cjdbc.driver.ControllerInfo)

getController

public ControllerInfo getController()
                             throws NoMoreControllerException

Description copied from class: AbstractControllerConnectPolicy

Get a controller using the implementation specific policy

Specified by:

getController in class AbstractControllerConnectPolicy

Returns:

ControllerInfo of the selected controller

Throws:

NoMoreControllerException - if no controller in the controller list is reachable

See Also:

AbstractControllerConnectPolicy.getController()