info.magnolia.module.delta
Class ConditionalDelegateTask

java.lang.Object
  info.magnolia.module.delta.AbstractTask
      info.magnolia.module.delta.ConditionalDelegateTask

All Implemented Interfaces:

Task

Direct Known Subclasses:

ChildrenExistsDelegateTask, IsInstallSamplesTask, NodeCheckDelegateTask, NodeExistsDelegateTask

public abstract class ConditionalDelegateTask
extends AbstractTask

A task that delegates to another if a condition is true, or to an optional other if it is false. TODO : get descriptions from delegate + a description of the condition ?

Version:

$Revision: $ ($Author: $)

Author:

gjoseph

Field Summary

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

log

Constructor Summary

protected	ConditionalDelegateTask(String taskName, String taskDescription, Task ifTrue)
	ConditionalDelegateTask(String taskName, String taskDescription, Task ifTrue, Task ifFalse)

Method Summary

protected abstract boolean	condition(InstallContext installContext)
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.

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

ConditionalDelegateTask

protected ConditionalDelegateTask(String taskName,
                                  String taskDescription,
                                  Task ifTrue)

ConditionalDelegateTask

public ConditionalDelegateTask(String taskName,
                               String taskDescription,
                               Task ifTrue,
                               Task ifFalse)

Method Detail

execute

public void execute(InstallContext ctx)
             throws TaskExecutionException

Description copied from interface: Task

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.

Throws:

TaskExecutionException

condition

protected abstract boolean condition(InstallContext installContext)
                              throws TaskExecutionException

Throws:

TaskExecutionException