go to post Alexey Maslov · Oct 1, 2020 Nick,May I ask you: where did this magic number (201772B865) come from?
go to post Alexey Maslov · Sep 30, 2020 Whenever I return "useful" value from a method I regret it afterward. E.g. set square=##class(mathCls).squareTriangle(a, b, c) What if something went wrong, e.g. actual parameters (a, b, c) are invalid? I need some sign of it, so I'm forced to add some kind of status code. Let it be of %Status type. So, the caller's code is getting more complex: set square=##class(mathCls).squareTriangle(a, b, c, .sc) if $$$ISERR(sc) $$$ThrowStatus(sc) In contrast, when the status code is returned, it is not getting significantly complex: $$$TOE(sc,##class(mathCls).squareTriangle(a, b, c, .square)) Besides, if each method returns status (even when it is always $$$OK), the whole code is looking more consistent and does not need modification if some of its methods get new behavior and able to return some error status as well.
go to post Alexey Maslov · Sep 30, 2020 Doing finalization like this you are rejecting your previous point to use $$$qoe(...).
go to post Alexey Maslov · Sep 30, 2020 Acting this way, you are just quitting your method on error. What if your method needs finalization? Both approaches have been discussed above (try/catch or $ztrap/$etrap) allow it easily.
go to post Alexey Maslov · Sep 29, 2020 Evgeny,Is it a question: try/catch (or another way of error handling) or %Status? If we try to follow some solid design principles, each method should perform only one function, have only one way to exit from, and should inform the caller whether it succeded. So, we should use both. Extending your sample: ClassMethod solid1(parameter, ...) as %Status { set sc=$$$OK try { $$$TOE(sc,##class(x.y).a()) $$$TOE(sc,##class(x.y).b()) ... $$$TOE(sc,obj.NormalMethod(parameter)) ... } catch e { // error handling set sc=e.AsStatus() } // finally... common finalization for both (good or bad) cases return sc } One could write it in another fashion, e.g. ClassMethod solid2(parameter, ...) as %Status { set sc=$$$OK new $estack,$etrap set $etrap="if $estack=0 goto errProc" set sc=##class(x.y).a()) if 'sc goto solid2Q set sc=##class(x.y).b()) if 'sc goto solid2Q ... set sc=obj.NormalMethod(parameter) if 'sc goto solid2Q ... solid2Q // finally... common finalization for both (good or bad) cases return sc errProc // common error handler // error handling set sc=$$$ERROR(5001,"solid2 failed: "_$ze) goto solid2Q } Which version is better? If we don't need individual error handling of ##class(x.y).a(), ##class(x.y).b(), etc calls, I'd prefer solid1. Otherwise, solid2 seems to be more flexible: it's easy to add some extra processing of each call return. To achieve the same flexibility in solid1, we are to cover each call in an individual try-catch pair, making the coding style too heavy.
go to post Alexey Maslov · Sep 11, 2020 ...as much as possible avoid the need to use subscript level mapping (SLM) to manage growth of a single global across multiple databases. Ray, may I ask you: why should we avoid it?
go to post Alexey Maslov · Sep 11, 2020 Several ##class can be eliminated, making the code shorter and readable writable better: ClassMethod CRUDUser(id, name) As %String { q:'$d(name) "Name required" s x=$classmethod("Data.User",$s($g(id)="":"%New",1:"%OpenId"),$g(id)) q:'x "User not found" s x.Name=name q $s(x.%Save()=1:"User saved",1:"Error saving") }
go to post Alexey Maslov · Sep 4, 2020 Nigel,I'm OK with the answers given by Eduard and Danny. After moving to VS Code situation with snippets would be even better.Thank you again.
go to post Alexey Maslov · Sep 4, 2020 Thank you, Nigel. Multi-line macros don't meet my needs. What I really need are fillable patterns (templates), to prompt developers on writing methods (functions) descriptions in a standardized manner, something like this: /// -------------------------------------------------------------------------------------------- /// Method purpose /// /// **Arguments** /// /// #. *pArg1*: /// #. *pArg2*: /// /// **Returns** /// /// /// **Notes** /// /// /// **Call sample** /// :: /// /// ; code line 1 /// ; code line 2 ///
go to post Alexey Maslov · Sep 2, 2020 Daniel,Not talking about whether $zerror/$ztrap is good or bad, false positives and negatives can be avoided if use it right way. The well-known pattern is as follows: rouA set $ze="",$zt="rouAerr" ... set sc=$$funB() if 'sc quit sc ... quit sc rouAerr set $zt="" ; that's of great importance! set sc=$$$ERROR(5002,$ze) ; just a sample of processing $ze... quit sc funB() set $ze="",$zt="funBerr" ; while not neccessary, local $ztrap can be defined ... quit sc funBerr set $zt="" set sc=$$$ERROR(5002,$ze) quit sc
go to post Alexey Maslov · Sep 2, 2020 I am not putting my hopes on GBLOCKCOPY due to its limitations This precaution sounds strange in your context: if you are simply copying a set of globals that are actively being modified, you will get an unpredictable result nevertheless the utility you choose. To make a consistent copy, one should apply journal records or (if copying to another Cache instance) use some cross-system technique, such as Mirroring or Shadowing, while both require Multi-Server cache.key. If you tell us more about the task you are trying to solve, we'd advise you better.
go to post Alexey Maslov · Jul 31, 2020 Public recognition by developer level Other vendors from your list have some kind of developer certification as well. E.g., https://docs.microsoft.com/en-us/learn/certifications/Or you meant something else, didn't you?
go to post Alexey Maslov · Jul 23, 2020 it is a part of admin-panel of our web-application I guessed it was not ad hoc writing ;) Even with some universal tool like your admin panel, you can generate only those tasks which code you preliminary prepared with d code.Write() commands. The reasons of preparing code this way in this very case are still unclear for me: I can hardly imagine extra functionality you can add to the traditional approach demonstrated in Evgeny's reply.
go to post Alexey Maslov · Jul 23, 2020 Alexandr, why did you prefer generating the task class instead of just writing it in some text editor? Looks like overkill for such a small task.
go to post Alexey Maslov · Jul 21, 2020 Yes, it's possible. You can use %SYS.Task for a Task API. Its methods and properties are well documented in its superclass %SYS.TaskSuper.
go to post Alexey Maslov · Jun 16, 2020 Yone, if you really moving the files every day, you don't need to check the date: there are no old files in your in-folders, because they have been deleted with mv (move) command. Most pieces of software which does the similar tasks (e-mail clients and servers, SMS processors, etc) do it this way, moving files rather than just copying them. The simpler the better, isn't it?
go to post Alexey Maslov · Jun 15, 2020 Please look athttps://cedocs.intersystems.com/latest/csp/documatic/%25CSP.Documatic.cls?APP=1&CLASSNAME=%25SYSTEM.Licensequery ConnectionAppList() The data source is the license server. The license server maintains counts of ISC.Appname license sections but does not manage other application license sections. Usage of other license sections can be examined with the ApplicationUserList query which returns license use for all applications on the current Cache instance. "...other application license sections" is just our case, so ISC licence server can't help much.
go to post Alexey Maslov · Jun 15, 2020 Eduard, If you are still interested: Application licensing doesn't support distributed license accounting; it was the stopper for us as our largest customer is running Cache based application (SP.ARM's HIS qMS) in distributed environment.
go to post Alexey Maslov · Jun 11, 2020 I'd like cm that stands for community. Everybody knows that we are all developers here, so this is not of great need to be reminded. Just IMHO :)