Solved

Need to monitor file activity (without scanning with FindFirst)

Posted on 2009-05-05
8
679 Views
Last Modified: 2013-11-23
I need to monitor and log file activity in a directory tree for a timesheets program. My old version simply scanned the entire tree and logged the file info that had changed (either created or modified). However, this is becoming unworkable due to the ever expanding tree. Is there a way to link into some notification mechanism so that my app could stop the periodic (and now time-consuming) scans. I'd like to have it behave like the Windows Explorer which somehow knows that a new file has been added to a folder and uses that notification to update its file list.
0
Comment
Question by:BradKilmer
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3
8 Comments
 
LVL 13

Expert Comment

by:ThievingSix
ID: 24311017
0
 

Author Comment

by:BradKilmer
ID: 24311287
Oops. I take it back. That's not what I'm looking to do. I downloaded and installed the TSHChangeNotify component and did a few file operations within Windows Explorer and they were logged as expected. I thought that was the answer; however, I was wanting to receive notifications whenever ANY application modified files within a specified tree. I want to log the name all files being created/deleted/modified by any app; the only event logged by this component when a non-shell file operation is performed is the UpdateDir (and that's only when you have the Windows Explorer opened to the folder where the affected files reside, and I've already observed 2 failures to log even that).
Still looking...
0
 
LVL 13

Expert Comment

by:ThievingSix
ID: 24311322
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:BradKilmer
ID: 24311665
That's closer. The events are fired when the specified changes occur (from any app), but I need to get the file names that trigger the change events; I can't see where the filename information is accessible at any point during the event processing. Therefore, I would still have to scan the directory tree being monitored to see what change triggered the event: scanning the directory tree brings me back to square one (that's what I'm trying to get away from). Thanks for your help, but I'm thinking that my best option is to optimize my existing code so that scans the directory tree in short bursts and stops locking up the main VCL thread for tens of seconds at a time; it doesn't have to scan that rapidly, just constantly.

Thanks
BK
0
 
LVL 13

Accepted Solution

by:
ThievingSix earned 500 total points
ID: 24311877
Alright, I got it!

http://www.torry.net/vcl/filedrv/notification/urdirmonitoring.zip

That download will give you the file DirMonitoring_d5.dpk. Open it to install the component.

For me the requires for it were not correct.

I saw:

requires
  vcl50,
  Vclx50;

I needed to remove the "50" from each for it to work. I ran the demo application and watched C:\ and renamed a file from the explorer and from another program. Should work.
0
 

Author Comment

by:BradKilmer
ID: 24315333
PERFECT!
Thanks!
BK
0

Featured Post

Migrating Your Company's PCs

To keep pace with competitors, businesses must keep employees productive, and that means providing them with the latest technology. This document provides the tips and tricks you need to help you migrate an outdated PC fleet to new desktops, laptops, and tablets.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…
This tutorial covers a step-by-step guide to install VisualVM launcher in eclipse.
The viewer will learn how to use and create new code templates in NetBeans IDE 8.0 for Windows.

688 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question