info.magnolia.module.delta
Class AbstractConditionalRepositoryTask

java.lang.Object
  info.magnolia.module.delta.AbstractTask
      info.magnolia.module.delta.AbstractRepositoryTask
          info.magnolia.module.delta.AbstractConditionalRepositoryTask

All Implemented Interfaces:

Task

public abstract class AbstractConditionalRepositoryTask
extends AbstractRepositoryTask

An abstract implementation of a RepositoryTask that only needs to be executed when a specific node is not found in the repository. Can be used to easily create self-check tasks for mandatory configuration.

Version:

$Id$

Constructor Summary

AbstractConditionalRepositoryTask(String name, String description)

Method Summary

void	execute(InstallContext ctx) A good-citizen task should execute itself responsibly: it should know what to do in case of problems: for instance, fixable or irrelevant issues should usually just be logged used the InstallContext methods, when the user can fix them later on.
abstract String	getCheckedPath() Returns a path in a repository in the form repository:path (e.g.

Methods inherited from class info.magnolia.module.delta.AbstractRepositoryTask

doExecute

Methods inherited from class info.magnolia.module.delta.AbstractTask

getDescription, getName, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractConditionalRepositoryTask

public AbstractConditionalRepositoryTask(String name,
                                         String description)

Parameters:

name - task name

description - task description

Method Detail

getCheckedPath

public abstract String getCheckedPath()

Returns a path in a repository in the form repository:path (e.g. config:server/activation) that will checked. Only if such path doesn't exist, doExecute() will be called.

Returns:

repository:path string

execute

public void execute(InstallContext ctx)
             throws TaskExecutionException

A good-citizen task should execute itself responsibly: it should know what to do in case of problems: for instance, fixable or irrelevant issues should usually just be logged used the InstallContext methods, when the user can fix them later on. The task could also potentially do backups of nodes it needs to modify extensively, so the user could refer to the backups in case of problem. In the event of an unrecoverable issue, the Task could also throw a TaskExecutionException, knowing that will cancel the whole module's installation, update and startup. If a TaskExecutionException must be thrown, keep in mind that the exception message will still be shown to the end user, so try to keep them human readable.

Specified by:

execute in interface Task

Overrides:

execute in class AbstractRepositoryTask

Throws:

TaskExecutionException