# Asking for help again about my thread debug

**URL:** <https://www.ruby-forum.com/t/asking-for-help-again-about-my-thread-debug/229055>\
**Category:** Rails\
**Created:** [May 13, 2006, 5:49pm UTC](https://www.ruby-forum.com/t/asking-for-help-again-about-my-thread-debug/229055 "2006-05-13T17:49:26Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![charlie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/d6d6ee/32.png) [@charlie](https://www.ruby-forum.com/u/charlie)\
**Post date:** [May 13, 2006, 5:49pm UTC](https://www.ruby-forum.com/t/asking-for-help-again-about-my-thread-debug/229055/1 "2006-05-13T17:49:26Z")

</div>

As [http://www.ruby-forum.com/topic/65495](http://www.ruby-forum.com/topic/65495) has shown,I have drawn into  
trouble about my thread debugging for some days,and need help to solve  
it urgently!

This thread problem comes from the design requirements that my web  
application will get the rss feeds read which are generated by the web  
application itself.  
[Feedtools question - Rails - Ruby-Forum](http://www.ruby-forum.com/topic/63984) has shown my code,and the key code  
is the following:

@feed =  
FeedTools::Feed.open(“[http://localhost:3000/feeds/userrss/#{params[:id]}](http://localhost:3000/feeds/userrss/#%7Bparams%5B:id%5D%7D)”)

userrss is the controller to generate rss feeds:  
class FeedsController \< ApplicationController  
def userrss  
@user = User.find\_by\_id(params[:id])  
@articles = @user.articles(:all,:order =\> ‘updated\_at desc’)  
@feed = FeedTools::Feed.new  
@feed.title = “#{@user.login}”  
@feed.author = “#{@user.login}”  
@feed.link = “[http://localhost:3000](http://localhost:3000)”  
@articles.each do|@article|  
@feed\_item = FeedTools::FeedItem.new  
@feed\_item.link =  
“[http://localhost:3000/articles/view/#{@article.id}](http://localhost:3000/articles/view/#%7B@article.id%7D)”  
@feed\_item.content = “#{@article.body}”  
@feed.entries \<\< @feed\_item  
end  
end  
end

The above code can not work because of the thread problem:a controller  
will not return until it got the response from another controller.  
When I use Webrick webserver,If I change the value of  
@@allow\_concurrency of Actionpack,it can work,but will not If I deploy  
the web application using Apache+scgi. Currently my operating system is  
windows,what should i do to conquer this thread question,i have no idea  
but a silly scheme:

To use two web server on one computer with different http request  
port,for example Apache of 80 and Webrick of 3000,and then deploy the  
web application under both Apache and Webrick with:  
@feed =  
FeedTools::Feed.open(“[http://localhost:3000/feeds/userrss/#{params[:id]}](http://localhost:3000/feeds/userrss/#%7Bparams%5B:id%5D%7D)”)  
which the request of [http://localhost:3000/feeds/userrss/#{params[:id]}](http://localhost:3000/feeds/userrss/#%7Bparams%5B:id%5D%7D)  
will cause the Webrick to process it.

Very confused and urgent,Thanks!!!

Charlie

---

<div class="post-metadata">

**Author:** ![charlie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/d6d6ee/32.png) [@charlie](https://www.ruby-forum.com/u/charlie)\
**Post date:** [May 13, 2006, 5:54pm UTC](https://www.ruby-forum.com/t/asking-for-help-again-about-my-thread-debug/229055/2 "2006-05-13T17:54:01Z")

</div>

charlie wrote:

> As [Thread question - Rails - Ruby-Forum](http://www.ruby-forum.com/topic/65495) has shown,I have drawn into  
> trouble about my thread debugging for some days,and need help to solve  
> it urgently!
> 
> This thread problem comes from the design requirements that my web  
> application will get the rss feeds read which are generated by the web  
> application itself.  
> [Feedtools question - Rails - Ruby-Forum](http://www.ruby-forum.com/topic/63984) has shown my code,and the key code  
> is the following:  
> I didn’t follow your original problem thread, so I’m not sure if this  
> was suggested and ruled out. Why not cache the rss feed when you  
> generate it, and read the cached file rather than trying to connect back  
> into the app? That would avoid threading completely…

---

<div class="post-metadata">

**Author:** ![charlie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/d6d6ee/32.png) [@charlie](https://www.ruby-forum.com/u/charlie)\
**Post date:** [May 13, 2006, 8:13pm UTC](https://www.ruby-forum.com/t/asking-for-help-again-about-my-thread-debug/229055/3 "2006-05-13T20:13:04Z")

</div>

On May 13, 2006, at 9:07 AM, charlie wrote:

> I just use the example of generating feeds of articles to explain the  
> thread problem more explicitly,in fact,the web application is more  
> complicated,and in many cases the feeds will be first accessed by the  
> web application itself,it has a compex logic–the design requires  
> that…
> 
> Alex Y. wrote:

Charlie-

```
To make this happen you need to get two rails backends running.

```

Since you’re on windows lighttpd/fcgi is not an option. But You can  
run lighttpd/mongrel on windowsw. You set up lighttpd to proxy  
requests to two mongrel servers running. This way you can do exactly  
what you are trying to do.

```
But from looking at what you are trying to do i think you may be

```

approaching it from the wrong angle. Why do you need to make a http  
requests to your own application? why not just make a way to get the  
same data from within your app without making an http request? Give  
me some more details and maybe I can help you come up with a better  
way of doing this then the extra http requests. After all rails is an  
integrated environment, and you should be able to find a way to do  
what you want without the extr http request.

-Ezra

---

<div class="post-metadata">

**Author:** ![charlie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/d6d6ee/32.png) [@charlie](https://www.ruby-forum.com/u/charlie)\
**Post date:** [May 13, 2006, 6:07pm UTC](https://www.ruby-forum.com/t/asking-for-help-again-about-my-thread-debug/229055/4 "2006-05-13T18:07:25Z")

</div>

I just use the example of generating feeds of articles to explain the  
thread problem more explicitly,in fact,the web application is more  
complicated,and in many cases the feeds will be first accessed by the  
web application itself,it has a compex logic–the design requires  
that…

Alex Y. wrote:

> charlie wrote:
> 
> > As [Thread question - Rails - Ruby-Forum](http://www.ruby-forum.com/topic/65495) has shown,I have drawn into  
> > trouble about my thread debugging for some days,and need help to solve  
> > it urgently!
> > 
> > This thread problem comes from the design requirements that my web  
> > application will get the rss feeds read which are generated by the web  
> > application itself.  
> > [Feedtools question - Rails - Ruby-Forum](http://www.ruby-forum.com/topic/63984) has shown my code,and the key code  
> > is the following:  
> > I didn’t follow your original problem thread, so I’m not sure if this  
> > was suggested and ruled out. Why not cache the rss feed when you  
> > generate it, and read the cached file rather than trying to connect back  
> > into the app? That would avoid threading completely…

---

<div class="post-metadata">

**Author:** ![charlie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/d6d6ee/32.png) [@charlie](https://www.ruby-forum.com/u/charlie)\
**Post date:** [May 13, 2006, 9:07pm UTC](https://www.ruby-forum.com/t/asking-for-help-again-about-my-thread-debug/229055/5 "2006-05-13T21:07:58Z")

</div>

I wonder if it would help to write some stand-alone ruby script to  
generate  
the feeds, then have your userrss action run the script using command  
expansion? And then when you read the feed you can have

@feed = FeedTools::Feed.open(RAILS\_ROOT + ‘/whatever/feed-generator.rb’)

Instead of

@feed =  
FeedTools::Feed.open(“[http://localhost:3000/feeds/userrss/#{params[:id]}](http://localhost:3000/feeds/userrss/#%7Bparams%5B:id%5D%7D)”)

If you go this route, be sure to add “require ‘config/environment’” to  
your  
standalone script so you can access your models.

I agree that it seems like you shouldn’t have to make an extra HTTP  
request.  
I tried googling “command line rails” to see if there were any way to  
interact with controllers from the command line, but I didn’t find  
anything.  
I’m sure there’s a way to do it though.

---

<div class="post-metadata">

**Author:** ![charlie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/d6d6ee/32.png) [@charlie](https://www.ruby-forum.com/u/charlie)\
**Post date:** [May 15, 2006, 5:11am UTC](https://www.ruby-forum.com/t/asking-for-help-again-about-my-thread-debug/229055/6 "2006-05-15T05:11:38Z")

</div>

On May 13, 2006, at 9:30 PM, charlie wrote:

> to say,inside the web application,there is an rss reader to read feeds  
> both from inside and outside. The feeds from inside are for the  
> friends’  
> published information, and I think this kind of style can give a good  
> experience for users.

Charlie-

```
Maybe you should consider caching the users rss feeds to disk using

```

caches\_page. Then use an observer to expire and rebuild the cache  
when one of the rss feeds gets updated. This way you could just read  
the other users rss feeds from within your app just by reading it off  
disk with render :file =\> ‘/other/users/feed.xml’.

```
For external websites a you can still use http even with only one

```

webrick or mongrel or whatever process running your rails app. And it  
wouldn’t block when you need to show users other rss feeds from  
within your app.

Cheers-  
-Ezra

---

<div class="post-metadata">

**Author:** ![charlie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/d6d6ee/32.png) [@charlie](https://www.ruby-forum.com/u/charlie)\
**Post date:** [May 14, 2006, 6:30am UTC](https://www.ruby-forum.com/t/asking-for-help-again-about-my-thread-debug/229055/7 "2006-05-14T06:30:29Z")

</div>

Hi,Ezra  
Let me explain some details about my web application.  
In my web app,users can register and publish their information such as  
books to be sold,dvd,…  
These information can be generated as rss feeds and read by any others.  
Another characteristic special is that the users registered can have  
friends that are also registered users.There is a panel to read their  
friends’ rss information together with other foreign rss feeds-- that is  
to say,inside the web application,there is an rss reader to read feeds  
both from inside and outside. The feeds from inside are for the friends’  
published information, and I think this kind of style can give a good  
experience for users.

Ezra Z. wrote:

> But from looking at what you are trying to do i think you may be  
> approaching it from the wrong angle. Why do you need to make a http  
> requests to your own application? why not just make a way to get the  
> same data from within your app without making an http request? Give  
> me some more details and maybe I can help you come up with a better  
> way of doing this then the extra http requests. After all rails is an  
> integrated environment, and you should be able to find a way to do  
> what you want without the extr http request.
> 
> -Ezra