I'm a ASP.NET and ABAP developer. For years, I used RFC's to communicate with ASP.NET using SAP .NET Connector.
During the integrated tests, sometimes we need to debug a RFC that has been called from ASP.ENT, just because the bug we are facing does not happens at SE37.
So, everytime I needed to debug the RFC, I just inserted:
IF <<CONDITION>>. WHILE 1 EQ 1. BREAK-POINT. ENDWHILE. ENDIF.
By doing so, the program gets stuck. Then I go to SM50 and debug it.
I was wondering if there is any other way of doing this, because I don't like the idea of changing code in order to debug, or implementing some debug control functionality.
So, what do you do when you need to debug RFC's?
Thanks in advance!
I assume you are using a fairly recent version of sap (4.7+)
Do the following:
Get the username that makes the RFC call into SAP in ASP
Fire up SE37, go to the code section of your RFC
Look at the menu on top, click on 'Utilities'
Click on Settings
Go for the Debugging tab
Fill in the username that will make the call from ASP
Click IP Matching (otherwise a debug session appears for every time any user makes the call)
Session breakpoint active immediately is nice to click as well
Put your external breakpoint where you need it (click the icon with the stop sign and the little man)
Test your ASP connector
The breakpoint should come into effect, a debug window will pop up
You might not have the authorization to do this, if it doesnt work, use SU53 to find out what you're missing.
This should work.
Tricky .. can you elaborate what you mean by "the bug does not happen at se37"?
Does that mean that you cannot reproduce the data that leads to your problem or that the problem is specific to the fact that the function module is called via RFC?
Usually, you should be able to use se37 to start the function module, and there are some ways to record different data constellations to the function module. The behavior of the function module should be the same, regardles of being called from se37 or via RFC ...
When you call a RFM via SE37 you unknowingly use SAP selection screen.
In case you have a table with header-line
when invoked from RFC it might have header line "filled up"
In case you call same FM from RFC the header line in initial.
LOOP AT PT_JNC.
EXIT.
ENDLOOP.
or READ TABLE PT_JNC INDEX 1.
will help populate header line
This is a subtle difference.
Other simple differences are SAP uses YYYYMMDD date format and HH24MISS time
Regards
jnc at Kolkata
Related
I have a plan of writing a small command line tool that does the following (without getting into details):
Listen for input stream (a tail of some files)
Parse incoming data and update screen information real-time (like the top command does for example)
Untill the application is being quited (CTLR + C) it will be updating (not appending!) the information on the screen.
I prefer to work with the Symfony console.
Since they have for example the progress-bar I expect it to be doable, since the progress-bar does update the screen. (However, I don't need an actual progressbar).
Keep listening for an input stream and keep updating when information comes in is something I am not sure about to be possible in this manner.
I can't find enough information on how to do this. Does anyone know if this is possible and what components I would need to:
Listen for input stream and trigger an event when information comes in
Update screen information
Any help would be appreciated.
Update:
For now I built the tool without using any framework. I wrote it myself by using this "Listening for incoming streams" example and this "setting cursor position" example (and ofcourse this referenced overview of commands).
However I still would like to know whether and how this would be possible using Symfony's console components.
Again I come to you guys for your expertise and advice on an issue that I am having. I was wondering if any of you would know how to detect if a web page has been modified using VB.NET. I need to be able to set up a task which periodically (like once a week) scans the user inputted web pages and if the web page content has changed, I need to fire off an email to an individual that it has changed (not the exact location on the page itself). I'll be storing the HTTP status and of course the page data itself as well as the date of when it was last modified. Of course this needs to be very fault tolerant since it could be another week before the check runs again. Any help would be great. Thank you.
EDIT
New twist on this question sorry. I had more time to think about what we wanted. So... Detecting ANY change on a web page would be kind of silly since time dependent elements of the page would change every so often. Instead, what I would like to do is be able to detect the documents in the page. For instance if there are excel, word docs, or pdfs that get changed on that page. So, I'd run the hash on these documents then on some sort of schedule do a check to see if new documents have been added or if the old documents have been modified. Any suggestions on how to detect the documents embedded on the page and running the hash? Thanks again!
As I mentioned in a comment, this sort of job is what checksums (also known as hash functions) were designed for.
You code for will look something like this:
- for each webpage of interest
- pull webbpage
- calculate checksum of contents
- is current checksum different to last checksum?
- if yes, send email
- store new checksum and other appropriate data
The .Net framework has a number of checksums available. The two most popular are MD5 and sha1
In addition to the checksum option, there are also various Diff function that achieve this, and provide much more information than changed=true/false. This question has more info:
How to tell when a web page has changed by x% in VB.net?
In a recent project we are currently getting 12031 errors. here is the complete error:
Sys.WebForms.PageRequestManagerServerErrorException 12031
the status code returned from the
server was 12031
The problem is, this doesn't happen all the time and we are unable to reproduce the error on development environment.
We use AJAX in our application and this exception happens on every page once in a while.
I've found a post on SO with the same problem and tried changing maxRequestLength to "1" to see if I constantly get the same error but I don't. Instead, I'm getting
Maximum request length exceeded.
So I'm starting to think that it is not related to maxRequestLength. I'm actually out of ideas. I have a ScriptManager in my MasterPage and its AsyncPostBackTimeout="240". That is the same amount of time (give or take). I get the 12031 error after 3,5 minutes of "nothing". I'm logging one of the pages and by logging, I mean logging every section of the page like "Page_Load is called" "xyz is called" etc and I have like 15 spots on the page for this. After user clicks a button and ScriptManager tries to do its job, no postback occurs, no logging happens. It is like the page wants to do a postback but too old to do it. Tries this for around 3,5 minutes and fails with the given error.
Please, if you have any ideas, HELP ME OUT .
Thank you
That error almost certainly has nothing to do with the size of the response, AsyncPostBackTimeout, or maxRequestLength.
Connection resets are usually indicative of poor network connectivity or a server loaded down to its capacity limits. A few things you could try:
Inspect the Windows Event Log during the time(s) that the kiosks were known to have received the error. Look for any relevant errors or warnings.
If feasible, ask the kiosk staff to use something like Pingtest to test the quality of their local network connection at the time that they receive the error in your app.
Use a service like Pingdom to ensure that the server itself isn't intermittently losing connectivity.
This error may be due to the HTTP Runtime limitation of the maxRequestLength. The default value is 4096.
Try adding (or editing) the following entry in your Web.Config:
"<httpRuntime maxRequestLength="8192" />" (effectively allowing 8mb of data transmission, instead of the default 4mb).
Please not....You can set data as per you max request. 8192 is not the limit. Also you need to add Page.Form.Attributes.Add("enctype", "multipart/form-data"); in Page_Load event of the page.
You'll want to enter this in the System.Web configuration section.
How do I avoid getting a PageRequestManagerParserErrorException?
To start with, don't do anything from the preceding list! Here's a matching list of how to avoid a given error (when possible):
Calls to Response.Write():
Place an or similar control on your page and set its Text property. The added benefit is that your pages will be valid HTML. When using Response.Write() you typically end up with pages that contain invalid markup.
Response filters:
The fix might just be to not use the filter. They're not used very often anyway. If possible, filter things at the control level and not at the response level.
HttpModules:Same as response filters.
Server trace is enabled:
Use some other form of tracing, such as writing to a log file, the Windows event log, or a custom mechanism.
Calls to Server.Transfer():
I'm not really sure why people use Server.Transfer() at all. Perhaps it's a legacy thing from Classic ASP. I'd suggest using Response.Redirect() with query string parameters or cross-page posting.
Another way to avoid the parse error is to do a regular postback instead of an asynchronous postback. For example, if you have a button that absolutely must do a Server.Transfer(), make it do regular postbacks. There are a number of ways of doing this:
The easiest is to simply place the button outside of any UpdatePanels. Unfortunately the layout of your page might not allow for this.
Add a PostBackTrigger to your UpdatePanel that points at the button. This works great if the button is declared statically through markup on the page.
Call ScriptManager.RegisterPostBackControl() and pass in the button in question. This is the best solution for controls that are added dynamically, such as those inside a repeating template.
Good luck!
I have received this error before when we had a Barracuda Device sitting in front of our website. It was a maximum request length issue because Barracuda protects against overloading the request size. We removed the device temporarily and it solved the problem. Not sure if this is your problem.
I'm thinking of a architectural way of displaying messages in our application (Flex-Asp.NET-SqlServer), mostly messages that announce for instance a downtime.
Currently I was thinking of creating a table FlexMessage that holds the name of a message (based on that name I now where to put in Flex) and the value (the message itself). As a result however, someone will have to create these messages and also delete them when they are no longer valid. So, thinking further, I thought of creating messages having a startdate and enddate, so an interval in which they need to be displayed. Like this, someone could login to the management part and create a message that needs to be displayed from a certain date until a certain date.
I could also hardcode it in the Flex Application, but that would mean putting a new build online (of the swf) each time something changes with a certain message. No good idea I guess.
Is there a better way for this that I haven't thought about?
One way to do this is to place your messages in an RSS feed, then read that feed from the Flex application.
There is an example of how to do this here: http://www.artima.com/weblogs/viewpost.jsp?thread=23819
I've been quite impressed with dynamic data and how easy and quick it is to get a simple site up and running. I'm planning on using it for a simple internal HR admin site for registering people's skills/degrees/etc.
I've been watching the intro videos at www.asp.net/dynamicdata and one thing they never mention is how to handle concurrency control.
It seems that DD does not handle it right out of the box (unless there is some setting I haven't seen) as I manually generated a change conflict exception and the app failed without any user friendly message.
Anybody know if DD handles it out of the box? Or do you have to somehow build it into the site?
Concurrency is not handled out the of the box by DD.
One approach would be to implement this on the database side, by adding a "last updated" timestamp column (or other unique stamp, such as a GUID) to each table.
You then create an update trigger for each table. For each row being updated, is the "last updated" stamp passed in the same as the one on the row in the database?
If so, update the row, but give it a new "last updated" stamp.
If not, raise a specific "Data is out of date" exception.
On the client side, for each row you update, you'd need to refresh the "last updated" stamp.
In the client code you watch for the "Data is out of date" exception and display a helpful message to the user, asking them to refresh the data and re-submit their change.
Hope this helps.
All depends on the definition, what do you mean under "out of the box". Of cause you have to create a lot of code to handle concurrency, but some features help us to implement it.
My favorite model is "optimistic concurrency" based on rowversion datatype of SQL Server. It is like "last updated" timestamp, but you need not use any update trigger for each table. All updates of the corresponding "timestamp" column in your tables will be made automatically by SQL server at every update of data in the table row. I describes it in my old answer Concurrency handling of Sql transactrion. I hope it will be helpful for you.
I was of the impression the Dynamic data does the update on the underlying data source. Maybe you can specify the concurrency model (pessimistic/optimistic) on the data meta model that gets registered on the App_Init section. But you would probably get unable to save changes error, so by default would be pessimistic, last in loses....
Sorry to replay late. Yes DD is too strong when it come to fast development of project. Not only that it is base for .Net 4.0. DD is more enhance and have been included in .Net 4.0.
DD mostly work on Linq to sql. I will suggest you to have a look on that part.
In linq to SQl when you go to property of table you will find a property there which specify wheater to check the old value before updating new value. If you set that true I think your proble will get handle.
wish you best luck.
Let's learn from each other.
The solution given by Binary Worrier works and it's widely used on platforms providing a GUI to merge the changes (e.g. source control programs, wiki engines, etc). That way none of the users lose their changes. In the other hand, it requires much code or using external components or DLLs.
If you are not happy with that, another approach is just to lock the record that is being edited. Nobody else will be able to edit that record until the user commit the changes or his session expires. It has pros and cons but requires little code compared with the first option.