I am new to ensemble. I would like to know, whether there is any thing like filesystemwatcher in Cache/Ensemble. (Note : filesystemwatcher is in .Net)
My requirement is as follows, My Ensemble production (Business Process) will drop a file in a folder, in that folder a windows service will process the file and replace this file with a new file.
My Business process should wait till the new file is available in the folder and start resuming the process.
Please let me know if this is possible in Ensemble.
Yes - the File Inbound Adapter is most likely what you are looking for. See http://docs.intersystems.com/ens20141/csp/docbook/DocBook.UI.Page.cls?KEY=EFIL_inbound for details.
Related
I have a network path from AWS FSx (Already allowed Auditing from Folder's Advance Security Settings).
I need to log file Create/Delete/Edit on that network path from my server(Windows).
I tried to create a Custom view on Windows Event Viewer with event ID 4663.
But the problem is, that it shows logs from other folders as well.
I want to filter only the events from my network path and trigger a windows task, based on that Custom event view.
As it was a bit complicated to catch the detailed event from AWS, I changed the approach to accomplish my task.
I created a background worker to track all file changes in the given folder
using .Net Directory, File and FileSystemWatcher classes.
A cronjob runs every 3 hours to download a file using SFTP. The scheduled program is written in Perl and the module used is Net::SFTP::Foreign.
Can the Net::SFTP::Foreign download files that are only partially uploaded using SFTP?
If so, do we need to check the SFTP file modified date to check copy process completion?
Suppose a new file is uploading by someone in SFTP and he file upload/copy is in progress. If a download is attempted at the same time, do I need to code for the possibility of fetching only part of a file?
It's not a question of the SFTP client you use, that's irrelevant. It's how the SFTP server handles the situation.
Some SFTP servers may lock the file being uploaded, preventing you from accessing it, while it is still being uploaded. But most SFTP servers, particularly the common OpenSSH SFTP server, won't lock the file.
There's no generic solution to this problem. Checking for timestamp or size changes may work for you, but it's hardly reliable.
There are some common workarounds to the problem:
Have the uploader upload "done" file once upload finishes. Make your program wait for the "done" file to appear.
You can have dedicated "upload" folder and have the uploader (atomically) move the uploaded file to "done" folder. Make your program look to the "done" folder only.
Have a file naming convention for files being uploaded (".filepart") and have the uploader (atomically) rename the file after upload to its final name. Make your program ignore the ".filepart" files.
See (my) article Locking files while uploading / Upload to temporary file name for example of implementing this approach.
Also, some FTP servers have this functionality built-in. For example ProFTPD with its HiddenStores directive.
A gross hack is to periodically check for file attributes (size and time) and consider the upload finished, if the attributes have not changed for some time interval.
You can also make use of the fact that some file formats have clear end-of-the-file marker (like XML or ZIP). So you know, when you download an incomplete file.
For details, see my answer to SFTP file lock mechanism.
The easiest way to do that when the upload process is also under your control, is to upload files using temporal names (for instance, foo-20170809.tgz.temp) and once the upload finishes, rename then (Net::SFTP::Foreign::put method supports the atomic option which does just that). Then on the download side, filter out the files with names corresponding to temporal files.
Anyway, Net::SFTP::Foreign get and rget methods can be instructed to resume a transfer passing the option resume => 1.
Also, if you have full SSH access to the SFTP server, you could check if some other process is still writing to the file to be downloaded using fuser or some similar tool (though, note that even then, the file may be incomplete if for instance there is some network issue and the uploader needs to reconnect before resuming the transfer).
You can check the size of the file.
Connect to SFTP.
Check file size.
Sleep for 5/10 seconds.
Check file size again.
If size did not change, download the file, if the size changed do step 3.
I have UI, WCF and Workflow projects and each has a separate file to write the log. I changed autoFlush to false but it didn't make a difference.
Sounds like a concurrency issue. It will do that if it can't get a write lock on the file. Instead of failing, it will create a new guid prefixed file name.
Do you have multiple apps or multiple worker processes writing to the same file?
I'm trying to write event based ftp server that notifies me when some user uploads any file(users will never do any delete or other stuff, they just upload). Apache ftpServer with ftplets is what I need but it is java based and does not satisfy my environment. So what I'm planning to do is to run vsftpd and another process besides it which listens to IN_CLOSE_WRITE event. When vsftpd close the file descriptor after finishing file upload, my process will be notified and I will do some appropriate action. My questions are:
Is it possible that I miss any file upload?
Is it possible that IN_CLOSE_WRITE fired in other situations that I get inconsistent files instead of ready to use files?
if the incrond service crashes or is stopped you will loose notification during that time
IN_CLOSE_WRITE should work.
I've got a solution which I setup / cleanup using batch files ...
- there are a pair of MSMQ ports, send and receive, with another application on the end of the queues
I'm finding I can't properly stop the orchestration in the batch file ... the error is the send port is unenlisted
- I'm using the StopOrch.vbs script from the SDK samples
But I can go into BizTalk Admin Console and manually stop the orchestration with Full Terminate Ok
The setup / cleanup works Ok if I don't actually push any messages down the MSMQ queues
You might also take a look at the Microsoft.BizTalk.ExplorerOM.dll. It is contains business level objects that are pretty nice to interact with in .NET code. You can find the dll in the installation directory, mine is at: C:\Program Files (x86)\Microsoft BizTalk Server 2009\Developer Tools
Here is the MSDN documentation on it:
http://msdn.microsoft.com/en-us/library/microsoft.biztalk.explorerom(BTS.20).aspx
And a good high level walk through of its use:
http://geekswithblogs.net/claeyskurt/archive/2008/10/13/125815.aspx
Steve,
I would look at using a powershell script to handle terminating all the suspended messages and also shutdown the the orchestration the proper way. I believe there's a set of these scripts on codeplex if you search. Also look at the SDC MSBuilt components on complex for doing that as well.
-Bryan