Rename the Foreach Loop Container “FOREACH File in SourceFolder”:ĭouble-click the Foreach Loop Container to open the editor. In fact, you could do everything I’m showing you in this demo using a single Script Task.ĭrag a Foreach Loop Container from the SSIS Toolbox onto the Control Flow surface. Please realize you can accomplish the same thing using an SSIS Script Task and a little. One is more “SSIS-y,” the other is more “script-y.” I’m going to show you the “SSIS-y” way. We will use the SourceFolder parameter to set our directory to “watch” for a file. Rename the default SSIS Package SnifferPackage.dtsx: An SSIS PackageĬreate an SSIS Project named SnifferDemo: When it’s time to test, I will copy the file from the staging directory and paste it into the data directory. I’ve placed my file in a staging directory: I created LeonardsAndPets.csv, shown above. Sniffer Demoīegin by creating a file that contains some data. I can hear you thinking, “What does a sniffer do, Andy?” I’m glad you asked! The sniffer executes every now and then, checks for some condition – like the presence of a file in a directory – logs what it finds, and then responds accordingly. You can use a pattern I call the Sniffer Design Pattern.
#OPEN SOURCE FILEWATCHER HOW TO#
The Snifferīut what if all you really know is SSIS? Maybe you don’t know how to write a service maybe you don’t have time to learn.
If you really, really need to start loading the contents of a file within milliseconds of its arrival, please write a service. I’ve seen way too many memory leaks to feel comfortable with an SSIS package running forever. Have you seen the SSIS File Watcher demos where a developer puts an SSIS package in an infinite loop while it waits for a file to show up in a directory? It’s a popular pattern, especially when files are FTP’d (or SFTP’d) to enterprises for processing.
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