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Adding markers during project refresh [message #336577]

Wed, 24 June 2009 09:23

Eclipse User

Hi everyone,

I have to create markers on resources, the thing is that I find the
resources to associate with markers during a project refresh which I think
locks the resource for modifications (I get a ResourceException : the
resource tree is locked for modifications).

So I'd like to know if there's a way to unlock the resource tree for
modifications or if there's any other way to add visual informations in
java editors.

Thanks,

Julien

Re: Adding markers during project refresh [message #336613 is a reply to message #336577]

Thu, 25 June 2009 04:35

Eclipse User

Julien M. wrote:

> Hi everyone,

> I have to create markers on resources, the thing is that I find the
> resources to associate with markers during a project refresh which I think
> locks the resource for modifications (I get a ResourceException : the
> resource tree is locked for modifications).

> So I'd like to know if there's a way to unlock the resource tree for
> modifications or if there's any other way to add visual informations in
> java editors.

> Thanks,

> Julien

Julien, are you trying to create markers inside IResourceChangeListener ?
Listeners are not allowed to modify resources during the notification
except during PRE_BUILD and POST_BUILD type of events.Instead, you could
try scheduling a Job from the listener to create the desired markers.

Hitesh

Re: Adding markers during project refresh [message #336625 is a reply to message #336613]

Thu, 25 June 2009 10:01

Eclipse User

Thanks for your answer Hitesh.

The attempt to create markers is not inside an IResourceChangeListener but
is indirectly triggered by one.

I read the eclipse article about jobs
( http://www.eclipse.org/articles/Article-Concurrency/jobs-api .html) and
tried to create a job that waits 'till the resource allows modifications
but I get the following exception :
java.lang.NullPointerException
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:71)

I created a sub class of Job and put the following in the run method :

if( resource != null ){
IMarker m = null;
IResourceRuleFactory ruleFactory;
ruleFactory = ResourcesPlugin.getWorkspace().getRuleFactory();
ISchedulingRule rule = ruleFactory.createRule(resource);
IJobManager jobManager = Job.getJobManager();
try {
jobManager.beginRule(rule, monitor);
m = resource.createMarker(IMarker.PROBLEM);
m.setAttribute(IMarker.MESSAGE, "Test message");
} catch (CoreException e) {
e.printStackTrace();
}
finally{
jobManager.endRule(rule);
}
}

Any idea how I could get rid of the exception ?

Julien

Re: Adding markers during project refresh [message #336633 is a reply to message #336625]

Thu, 25 June 2009 11:14

Eclipse User

Silly me I was just returning null (...) thanks for the tip !

Now I need to get the line number and position of IField, IMethod and
IType. I think it's possible is there any other than using the AST/DOM API
?

Julien

Re: Adding markers during project refresh [message #336634 is a reply to message #336633]

Thu, 25 June 2009 11:25

Eclipse User

Julien M. wrote:
> Silly me I was just returning null (...) thanks for the tip !
>
> Now I need to get the line number and position of IField, IMethod and
> IType. I think it's possible is there any other than using the AST/DOM
> API ?
For declarations you can use the cheaper Java element API (see
org.eclipse.jdt.core.ISourceReference).

Dani
>
> Julien
>

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