Launching a background process
I am trying to write an application that will allow a user to launch a fairly long-running process (5-30 seconds). It should then allow the user to check the output of the process as it is generated. The output will only be needed for the user's current session so nothing needs to be stored long-term. I have two questions regarding how to accomplish this: 1. What is the best way to launch a background process such as this with a Pylons controller? 2. What is the best way to get the output of the background process back to the user? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-discuss@googlegroups.com To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en -~--~~~~--~~--~--~---
Launching a background process
I am trying to write an application that will allow a user to launch a fairly long-running process (5-30 seconds). It should then allow the user to check the output of the process as it is generated. The output will only be needed for the user's current session so nothing needs to be stored long-term. I have two questions regarding how to accomplish this: 1. What is the best way to launch a background process such as this with a Pylons controller? 2. What is the best way to get the output of the background process back to the user? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-discuss@googlegroups.com To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en -~--~~~~--~~--~--~---
Re: Launching a background process
On Jul 27, 2:07 pm, Dave Forgac tylerd...@gmail.com wrote: I am trying to write an application that will allow a user to launch a fairly long-running process (5-30 seconds). It should then allow the user to check the output of the process as it is generated. The output will only be needed for the user's current session so nothing needs to be stored long-term. I have two questions regarding how to accomplish this: 1. What is the best way to launch a background process such as this with a Pylons controller? 2. What is the best way to get the output of the background process back to the user? Often the better way of doing this is to run a separate persistent long running process which has an XML-RPC interface and have the web application communicate with the back end process using XML-RPC. This avoids all the mess that can often occur with forking off a web application process. The back end might then perform the work by using a thread pool which consumes the queued up requests. The XML-RPC interface would still be active and allow for monitoring of state of a queued work item, or even stopping it if worker thread has a way to be flagged through the record for the work item. Graham --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-discuss@googlegroups.com To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en -~--~~~~--~~--~--~---
Re: Launching a background process
On 7/27/09 8:40 AM, Graham Dumpleton wrote: On Jul 27, 2:07 pm, Dave Forgactylerd...@gmail.com wrote: I am trying to write an application that will allow a user to launch a fairly long-running process (5-30 seconds). It should then allow the user to check the output of the process as it is generated. The output will only be needed for the user's current session so nothing needs to be stored long-term. I have two questions regarding how to accomplish this: 1. What is the best way to launch a background process such as this with a Pylons controller? 2. What is the best way to get the output of the background process back to the user? Often the better way of doing this is to run a separate persistent long running process which has an XML-RPC interface and have the web application communicate with the back end process using XML-RPC. This avoids all the mess that can often occur with forking off a web application process. zc.async (see http://packages.python.org/zc.async/1.5.0/ ) might also be interesting. Wichert. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-discuss@googlegroups.com To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en -~--~~~~--~~--~--~---
