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| General Question - File Data Structures ? |
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| djharte |
 Posted: Thu Oct 03, 2002 3:03 am Post subject: General Question - File Data Structures ? |
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Apprentice
Joined: 02 Oct 2002
Posts: 26
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I was wondering if anyone could let me know the best way to approach this problem. I want a user on a remote system to be able to chose files (e.g. zip) using a servlet (webClient ?) and then connect to the workflow and send over the files, where during the first activity the files would be copied to the file system. Then I would perform various operations on the files in subsequent activities.
I am not sure how to pass files as paramaters, e.g. from the webClient to the workflow and then have them saved.
If anyone could point me in the right direction it would be greatly appreciated.
David |
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| amittalekar |
| Posted: Thu Oct 03, 2002 4:37 am Post subject: |
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Disciple
Joined: 03 Apr 2002
Posts: 166
Location: VA, USA
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It is not at all a good idea to store the entire file in the datastructure. It is
always better to have less data in the datastructure.
In your case what u can do is create a process and add the activities u want to do in that. Instead of entire file just store the file name or any other unique indentifier of the file in the datastructure. |
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| jmac |
| Posted: Thu Oct 03, 2002 5:00 am Post subject: |
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Jedi Knight
Joined: 27 Jun 2001
Posts: 3081
Location: EmeriCon, LLC
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If I am understanding you correctly I would suggest the following:
Activity 1 displays the appropriate directory structure and allows the user to select the file(s). The names of these files are stored in the output container and mapped to activity 2.
Activity 2 accesses the files and copies them. From there you go on to whatever it is you want this instance to do.
GOOD LUCK
_________________
John McDonald
RETIRED |
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| djharte |
| Posted: Mon Oct 07, 2002 7:07 am Post subject: Update and views on Workflow |
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Apprentice
Joined: 02 Oct 2002
Posts: 26
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Yep,
This is basically what I did, when the process starts, it calls a JSP, this then allows the user to choose a file. Next the user's data is directed to a servlet (outside the workflow) which uploads the file to the system. and then we go back into the first program/activity in the workflow. A bit messy really.....
I have to say, I am a little disappointed with the product, admitidly I still probably only know a fraction of its functionality but it is very difficult to find information on how to do simple things, from setup to programming.
Also, does anyone know if its possible to pass around user defined types, or where there is an example on how to use binary data datastructures between activities ??
Cheers
Dave |
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| jmac |
| Posted: Mon Oct 07, 2002 7:57 am Post subject: |
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Jedi Knight
Joined: 27 Jun 2001
Posts: 3081
Location: EmeriCon, LLC
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Dave:
I find JSPs to be extremely messy.... I never use them anymore, I use XML/XSL to format my web pages and write one class per activity which contains an "onCheckout() and onCheckin()" that will do any pre/post processing that is necessary.
You need your own viewer, in which you implement the checkoutWorkItemResponse method. Here you simply invoke the proper on Checkout() method based on the Activity name... You also write your own checkin method in a command handler and from there you can ivoke the proper onCheckin method, again based on actitivy name. This works for me, and I don't end up doing all of the redirection to other servlets.
_________________
John McDonald
RETIRED |
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