org.mmbase.module.builders.vwms
Class Judas

java.lang.Object
  |
  +--org.mmbase.module.builders.vwms.Vwm
        |
        +--org.mmbase.module.builders.vwms.Judas

All Implemented Interfaces:

MMBaseObserver, java.lang.Runnable, VwmInterface, VwmProbeInterface

public class Judas

extends Vwm

implements MMBaseObserver

A VWM which determines which urls need to be reloaded (i.e. for caching). Part of the descisionmaking is based on periodic maintenance, part is based on relating how changes on nodes cause a change in a page. Both methods are currently heavily stuffed with code specific to the VPRO (hardcoded urls and builders).

Version:

10 Apr 2001

Author:

Daniel Ockeloen, Rico Jansen, Pierre van Rooden (javadocs)

Fields inherited from class org.mmbase.module.builders.vwms.Vwm

name, probe, sleeptime, Vwms, wvmnode

Constructor Summary

Judas()
Constructor for Judas

Method Summary

void	addURL(java.lang.String url) Adds a url to be scheduled for reload.
void	addURL(java.lang.String url, int priority) Adds a url to be scheduled for reload.
void	getEpisodes(int number)
void	getItems(int number)
void	getPeople(int number)
boolean	nodeChanged(java.lang.String machine, java.lang.String number, java.lang.String builder, java.lang.String ctype)
boolean	nodeLocalChanged(java.lang.String machine, java.lang.String number, java.lang.String builder, java.lang.String ctype) Called when a remote node is changed.
boolean	nodeRemoteChanged(java.lang.String machine, java.lang.String number, java.lang.String builder, java.lang.String ctype) Called when a local node is changed.
boolean	performTask(MMObjectNode taskNode) performTask: This method is called when a vwmtask activates.
boolean	probeCall() probeCall: This method is called every x minutes where x is the maintenancetime field of the vwm.
boolean	pushReload(java.lang.String url) Forces a reload and subsequent caching of a page.

Methods inherited from class org.mmbase.module.builders.vwms.Vwm

addClient, claim, debug, failed, getName, getVwmNode, init, parseProperties, performed, putTask, releaseClient, rollback, run, start, stop

Methods inherited from class java.lang.Object

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

Constructor Detail

Judas

public Judas()

Constructor for Judas

Method Detail

performTask

public boolean performTask(MMObjectNode taskNode)

performTask: This method is called when a vwmtask activates. The task that needs to be performed is determined by the tasks' name field.

Overrides:

performTask in class Vwm

Parameters:

taskNode - The current Vwmtasks node.

Returns:

true when the task can be found and task execution succeeds, false otherwise

probeCall

public boolean probeCall()

probeCall: This method is called every x minutes where x is the maintenancetime field of the vwm. The maintanancetime for this bot HAS TO BE 1 hour=3600 sec for the 3voor12 jukeboxes reload.

Overrides:

probeCall in class Vwm

Returns:

Always returns 'true'.

nodeRemoteChanged

public boolean nodeRemoteChanged(java.lang.String machine,
                                 java.lang.String number,
                                 java.lang.String builder,
                                 java.lang.String ctype)

Description copied from class: Vwm

Called when a local node is changed.

Specified by:

nodeRemoteChanged in interface MMBaseObserver

Overrides:

nodeRemoteChanged in class Vwm

Following copied from class: org.mmbase.module.builders.vwms.Vwm

Parameters:

machine - Name of the machine that changed the node.

number - Number of the changed node as a String

builder - type of the changed node

ctype - command type, 'c'=changed, 'd'=deleted', 'r'=relations changed, 'n'=new

Returns:

true if maintenance was performed, false (the default) otherwise

nodeLocalChanged

public boolean nodeLocalChanged(java.lang.String machine,
                                java.lang.String number,
                                java.lang.String builder,
                                java.lang.String ctype)

Description copied from class: Vwm

Called when a remote node is changed.

Specified by:

nodeLocalChanged in interface MMBaseObserver

Overrides:

nodeLocalChanged in class Vwm

Following copied from class: org.mmbase.module.builders.vwms.Vwm

Parameters:

machine - Name of the machine that changed the node.

number - Number of the changed node as a String

builder - type of the changed node

ctype - command type, 'c'=changed, 'd'=deleted', 'r'=relations changed, 'n'=new

Returns:

true if maintenance was performed, false (the default) otherwise

nodeChanged

public boolean nodeChanged(java.lang.String machine,
                           java.lang.String number,
                           java.lang.String builder,
                           java.lang.String ctype)

getEpisodes

public void getEpisodes(int number)

getItems

public void getItems(int number)

getPeople

public void getPeople(int number)

addURL

public void addURL(java.lang.String url)

Adds a url to be scheduled for reload. The url has to be a relative url eg. /3voor12/bla/index.shtml?123+456 . If no parameters are given, the url STILL has to have a '?' character eg. /3voor12/test.shtml? The urls are forwarded to a thread that schedules the reloads based on priority. Uses default priority for scheduling reload.

Parameters:

url - the url to reload

addURL

public void addURL(java.lang.String url,
                   int priority)

Adds a url to be scheduled for reload. The url has to be a relative url eg. /3voor12/bla/index.shtml?123+456 . If no parameters are given, the url STILL has to have a '?' character eg. /3voor12/test.shtml? The urls are forwarded to a thread that schedules the reloads based on priority.

Parameters:

url - the url to reload

priority - priority at which the url needs to be reloaded

pushReload

public boolean pushReload(java.lang.String url)

Forces a reload and subsequent caching of a page. The routine makes a change to a netfiles object, which causes the NetFileSrv builder to invoke the PageMaster VWM that handles the filechanges, in this case transfer of the file to a remote proxy (a mirror server).

Parameters:

url - Url of the page to reload

Returns:

true