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From hitesh_jain <hitesh.m.j...@gmail.com>
Subject RE: problems getting the BackgroundEnvironment working within a thread
Date Wed, 14 Jan 2009 06:58:58 GMT

Hi,
 
I am using cocoon 2.1.11 and facing the similar problem of "The cocoon
protocol can not be used outside an environment" while resolving with
resolver.resolveURI("cocoon://test.xml").The code of resolveURI() is inside
a new thread. I tried to create the BackgroundEnvironment on the similar
lines as below inside the run() method of thread code. I have created a
class called Transformer extending
org.apache.cocoon.transformation.AbstractTransformer. With help of this
class i am able to get context by

context = ObjectModelHelper.getContext(objectModel);
and Logger by logger = transformer.getLogger();

So I am able to create BackgroundEnvironment(logger,context). But the
problem is i am no getting the manager(ComponentManager) instance to use
resolver = (SourceResolver) manager.lookup(SourceResolver.ROLE);

Can you help me here, in getting this manager instance?

Thanks & Regards,
Hitesh
 

Ard Schrijvers wrote:
> 
> 
>> 
>> Hi Ard,
>> 
>> Thanks for your answer. I hope you didn't go throw to much effort to
>> give me this answer because got is running a few hours back -it was a
>> real hard one to solve-. I didn't had the time to reports it back to
>> this mailing list. I will study you solution to see if I can 
>> improve my
>> own solution.
> 
> I did copy-paste of something I got so don't worry :-) 
> 
>> 
>> Thanks,
>> 
>> Marcel
>> 
>> 
>> 
>> -----Oorspronkelijk bericht-----
>> Van: Ard Schrijvers [mailto:a.schrijvers@hippo.nl] 
>> Verzonden: woensdag 28 december 2005 13:25
>> Aan: users@cocoon.apache.org
>> Onderwerp: RE: problems getting the BackgroundEnvironment 
>> working within
>> a thread
>> 
>> Hi Marcel,
>> 
>> first of all, I notice a lot of people lately having more or less the
>> same problem, including myself. I think it is way to hard in cocoon to
>> call pipelines which were initiated from some background things. 
>> 
>> Anyway, think you should do something like:
>> 
>> Make your class Contextualizable (which you probably already did)
>> 
>> 
>> private org.apache.cocoon.environment.Context environmentContext;
>> 
>> public void contextualize(Context ctx) throws ContextException
>>     {
>>         this.environmentContext =
>> (org.apache.cocoon.environment.Context)
>> ctx.get(Constants.CONTEXT_ENVIRONMENT_CONTEXT);
>> 
>>     }
>> 
>> You will need 
>> 
>> import org.apache.avalon.framework.context.Context;
>> import org.apache.avalon.framework.context.ContextException;
>> import org.apache.avalon.framework.context.Contextualizable;
>> 
>> and 
>> 
>> import org.apache.cocoon.Constants;
>> 
>> 
>> Now, when you want the SourceResolver, do someting like:
>> 
>> 	      BackgroundEnvironment env = null;
>>             Processor processor = null;
>>             Object key = null;
>> 
>>             try
>>             {
>>                 env = new BackgroundEnvironment(getLogger(),
>> environmentContext);
>>                 
>>                 try {
>>                     processor = (Processor)
>> manager.lookup(Processor.ROLE);
>>                 } catch (ServiceException e) {
>>                     throw new CascadingRuntimeException("Couldn't look
>> up the Processor",e);
>>                 }
>> 
>>                 env.startingProcessing();
>>                 
>>                 key = CocoonComponentManager.startProcessing(env);
>>                 CocoonComponentManager.enterEnvironment(env, new
>> WrapperComponentManager(manager), processor);
>>  
>>                 SourceResolver resolver = null;
>>                 try
>>                 {
>>                      
>>                     resolver = (SourceResolver)
>> manager.lookup(SourceResolver.ROLE);
>>   
>>                     Source inputSource =
>> resolver.resolveURI("cocoon://foo");
>>                     InputStream sourceStream =
>> inputSource.getInputStream();
>>                     try
>>                     {
>> 				// example what you could do with the
>> inputStream 
>>                         DefaultHandler doHandler = new 
>> DefaultHandler();
>>                         SourceUtil.toSAX(inputSource, doHandler);
>>                                                
>>                     }
>>                     catch (ProcessingException e)
>>                     {
>>                         e.printStackTrace();
>>                     }
>>                     finally
>>                     {
>>                         sourceStream.close();
>>                     }
>>                 }
>>                 catch (ServiceException e2)
>>                 {
>>                     // TODO Auto-generated catch block
>>                     e2.printStackTrace();
>>                 }
>>                 catch (MalformedURLException e1)
>>                 {
>>                     e1.printStackTrace();
>>                 }
>>                 catch (IOException e1)
>>                 {
>>                     e1.printStackTrace();
>>                 }
>>                 catch (SAXException e)
>>                 {
>>                     e.printStackTrace();
>>                 }
>>                 finally
>>                 {
>>                     if(resolver!=null)
>>                         manager.release(resolver);
>>                 }
>>             
>> 
>>             }
>>             catch (MalformedURLException e)
>>             {
>> 
>>                 e.printStackTrace();
>>             }
>>             finally
>>             {
>>                 CocoonComponentManager.leaveEnvironment();
>>                 CocoonComponentManager.endProcessing(env, key);
>>                 if (processor != null) {
>>                     manager.release(processor);
>>                 }
>>             }
>> 
>> Hope you can extract the parts you need,
>> 
>> AS
>> 
>> 
>> 
>> -----Original Message-----
>> From: Marcel Rouwenhorst [mailto:marcel.rouwenhorst@mobillion.nl]
>> Posted At: zaterdag 24 december 2005 11:11
>> Posted To: Cocoon User List
>> Conversation: problems getting the BackgroundEnvironment 
>> working within
>> a thread
>> Subject: problems getting the BackgroundEnvironment working within a
>> thread
>> 
>> 
>> Hi,
>>  
>> I'm currently working on a mail daemon that sends mail from an oracle
>> queue. (I don't want to use the cron block because it should be a
>> continues thread in de background). I created a new daemon thread with
>> the RunnableManager. This still works fine but when I want to call a
>> pipeline with the SourceResolver from within the run method I get an
>> exception that the cocoon protocol can't be used. 
>>  
>> I understood from some other mail in this mailing list that I should
>> make a 'fake' environment with the BackgroundEnvironment. I'm 
>> trying to
>> create a new instance of this class but that fails because I need a
>> context. If I implement Contextualizable I get a Context - an Avalon
>> context - but this one is incompatible with context - a Cocoon
>> environment context - that the BackgroundEnvironment needs. 
>>  
>> What am I doing wrong here? Any help is appreciated!
>>  
>> Thanks,
>> Marcel
>>  
>> 
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>> 
>> 
>> 
>> 
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>> 
> 
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> 

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