Re: Wait for File to Get Written
You could also use cfthread. Spawn the execution off into another thread, then use the cfthread join action to make current processing wait until the child thread is finished and rejoined. Put your logic to check for file existence in the child thread where the execution of the external app is. Then you have a timeout on the join so that it won't wait around forever. Might be a bit cleaner separation. Judah On Wed, May 30, 2012 at 9:55 AM, Mary Jo Sminkey wrote: > >>maybe use cfdirectory and look at 'dateLastModified' to wait for it to be >>2~5 old (so you know it has finished writing to it) > > Well, not sure that has any benefit by itself versus just checking if the > file exists. > > >>I would make a retry loop, say 5 times with a sleep in between >>and break out if file found > > Okay, yeah this is more the piece I was looking for, a way to find the file > quickly if it is there, while also ensuring that the page won't hang waiting > for it if it doesn't complete. Yeah, this should work nicely, thanks! > > Mary Jo > > > > > ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:351365 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Wait for File to Get Written
> If you just add a timeout to your cfexecute, CF will wait and > continue > when the legacy program is ready. Cool, yeah that looks like a good addition to this particular process. Mary Jo ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:351364 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Wait for File to Get Written
>maybe use cfdirectory and look at 'dateLastModified' to wait for it to be >2~5 old (so you know it has finished writing to it) Well, not sure that has any benefit by itself versus just checking if the file exists. >I would make a retry loop, say 5 times with a sleep in between >and break out if file found Okay, yeah this is more the piece I was looking for, a way to find the file quickly if it is there, while also ensuring that the page won't hang waiting for it if it doesn't complete. Yeah, this should work nicely, thanks! Mary Jo ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:351363 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Wait for File to Get Written
On Wed, May 30, 2012 at 1:03 AM, Mary Jo Sminkey wrote: > Basically I have situations where I need to wait for ColdFusion to finish > creating a file before displaying it. The legacy code I'm working with using > a cfexecute to run an executable file, and it uses this code snippet: > > If you just add a timeout to your cfexecute, CF will wait and continue when the legacy program is ready. Jochem -- Jochem van Dieten http://jochem.vandieten.net/ ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:351361 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Wait for File to Get Written
maybe use cfdirectory and look at 'dateLastModified' to wait for it to be 2~5 old (so you know it has finished writing to it) I would make a retry loop, say 5 times with a sleep in between and break out if file found On 30 May 2012 07:03, Mary Jo Sminkey wrote: > > I've run into this a number of times the last few months and couldn't find > anything in the archives that really seemed to address it. It's a common > enough issue that I'm sure people have dealt with it, and I'm curious what > solutions you might use. > > Basically I have situations where I need to wait for ColdFusion to finish > creating a file before displaying it. The legacy code I'm working with > using a cfexecute to run an executable file, and it uses this code snippet: > > > > > So basically it loops until it finds the file and then sends it down via a > cfcontent tag. > > I'm not particularly fond of this as if for any reason the executable > fails, you end up waiting for a timeout situation. In the past I've used a > sleep() to just pause the page but that's not particularly ideal either. > > Any better options, or maybe a combination of the two? > > > Mary Jo > > > > > ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:351360 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Wait for File to Get Written
I've run into this a number of times the last few months and couldn't find anything in the archives that really seemed to address it. It's a common enough issue that I'm sure people have dealt with it, and I'm curious what solutions you might use. Basically I have situations where I need to wait for ColdFusion to finish creating a file before displaying it. The legacy code I'm working with using a cfexecute to run an executable file, and it uses this code snippet: So basically it loops until it finds the file and then sends it down via a cfcontent tag. I'm not particularly fond of this as if for any reason the executable fails, you end up waiting for a timeout situation. In the past I've used a sleep() to just pause the page but that's not particularly ideal either. Any better options, or maybe a combination of the two? Mary Jo ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:351359 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
