Mark,

Good point on the output issue. I was thinking to make non-freezing output during the development but postponed this idea in favor of synchronous output (which is freezing browser until all the content renders). I will take this into account in future versions of WebTerminal.

CTRL-C for now works as a default combination for copying text. Unfortunately, after reading documentation a lot, I am still having no idea how to implement interrupt in WebTerminal. Technically speaking, I need to send the interrupt signal to a jobbed process somehow, but continue to execute it from, for example, some label in the COS code. Any help here is appreciated!

To track the interrupt enhancement, I have created this issue.

Hello Mark, thank you!

I did a little fast research and found that it is possible to make the behavior of printing long output similar to the standard Caché terminal (just to make terminal scroll and scroll through the text until the output stops). But how do you think, does it makes sense to replace this "freezing" behavior with always-scrolling output? In both cases, the output is not readable (normally readable). Maybe it makes more sense to display a floating message like "Output in progress..." when WebTerminal freezes for more than 1 second?

Would be glad to hear your opinion, thanks!

Thanks for hint, Edward, but how can I start using it? open 3564 use 3564 write ##class(%Library.Device).GetType() close 3564 command throws <NOTOPEN> exception.

I did log in exactly as I described:

When I come to the /playground/index page at first, Caché meets me with an authentication window, asking to enter my username and a password.

The output of the log is the next:

You're logged in as _SYSTEM
SessionId = xH9mWezT2o, NewSession = 1

Thank you!

Hello Bernd,

Yes, I did:

I tried %SaveData as documentation says as well, and this doesn't result as expected neither.

Wow, thanks, I thought that this routine will just be executed before the terminal session start and then the normal terminal session will happen.

Do you know is it possible to achieve this behavior? Thank you!

You're right, Class Explorer is supported from 2014.1.

Hello John!

This tool is available for Caché 2013.1+ versions (REST support).

Looks like exactly what was needed. Thank you, Timothy.

Thanks, Fabio!

Good to know about SPOOL device. Thank you! However, this method touches ^SPOOL global. Being set before the call, ^SPOOL global changes it's value, which is not secure for my needs.

P.S. Recently, Stuart gave me a complete answer. Thanks for your help!

Thank you,  Stuart!

I think this is a complete solution. I wrapped it to a class method and it works just as expected:

Results with

Nice! Will wonder if you have some sort of more-liner, which also saves and restores objects (orefs). But I believe it is not too useful.

Tricky. Good to know, thanks!

OK :) But how to use this variable name generator? :)

 set myNewVarName = ..GetNewVarName() // oops, no
 set @..GetNewVarName() = "" // now it's OK, but I need to call this function once more
 set @..GetNewVarName() = $ORDER(@@..GetNewVarName()) // oops, another variable names

Things get complicated here. I think we can stop on the solutions Michael and Timothy proposed.

Thanks!

Thank you, Timothy! This is good, but what if user specify ^||VariableNameList process-private variable before calling the method? The value will be lost:

USER>set ^||VariableNameList = "TempVal" zwrite ##class(Test.Class).GetVariablesByTimothy()
$lb("Einstein","Mozart")
USER>write ^||VariableNameList
...TempVal is now gone!...

Maybe there is no absolutely save method to get the variables list without touching/rewriting other variables or globals. I hope it is enough just to name temporary variables as no one suggests to name.

This is awesome. It works! Wondering how many things COS has.

But it also outputs variable x. I wrapped your code into the method, and that's what I got:

ClassMethod GetVariables() As %List
{
  set UndefinedSpecialList = $LB()
  set UndefinedSpecialInt = 0
  set Undefined = ""
  set Undefined = $ORDER(@Undefined)
  while (Undefined '= "") {
    quit:($ORDER(@Undefined) = "UndefinedSpecialList")
    set $LIST(UndefinedSpecialList, $INCREMENT(UndefinedSpecialInt)) = Undefined
    set Undefined = $ORDER(@Undefined)
  }
  return UndefinedSpecialList
}

It works awesome until user specify variables named UndefinedSpecialList, UndefinedSpecialInt and Undefined. I suppose user won't ever name variables this way, of course, but the method which will consider this is the winner.

Thank you Fabio! The problem with all of the methods in %ZEN.Auxiliary.jsonProvider is that it writes JSON string directly to the current device, not allowing to get the string itself. But nevertheless I did it by rewriting this method and creating a custom method, which returns a string instead of printing JSON to the device.

Thank you, Jon, it's good to know all the ways how this can be implemented.

OK! Edward, Dmitry, thank you. Will try the timeout approach.

Thanks, Dmitry, this is very close to what can be true. But to use this I need to interrupt WaitMsg method and check if the global exists each... Second? The one idea I come up with is to set timeout for that: set st = $system.Event.WaitMsg(, 1) if $LG(st,1)=0 {/*check if the process is gone and wait again*/} else {/*handle message*/} but is this the best way to do it? Are there any sort of registering trigger or system "interrupt" for this?

Thanks.

Apparently I reached another question now. How to terminate child process if the parent process is gone? WaitMsg method in $system.Event class does not return when the parent process terminates.

Oops. Thank you, it does not kill children process really.

In my application two processes already use interprocess communication. Child process rely on $ZPARENT variable. Is it possible to change it? Or the only way is to use custom variable to hold the parent's process ID?

Thanks for the tips! My use case is only to get the string, it doesn't matter printable or not.

I also tested that this works with nested lists, so everything is OK now:

Thanks John, the above terminal transcript is not correct showing what I wanted to show. I've fixed this.

Why can't you understand the purpose of this?

I can only transfer strings by some channel (f.e. interprocess communication). Now I need to send the array of strings (list, object, etc) from sender to receiver. To send this array, I must convert it to the string and then, after receiving, convert it back to array to read it's elements. How to do this in Caché 2013.*? The strings in array can contain any characters, so it is not possible to specify any delimiter character.

Finally I got why the question is pretty confusing for you. Just imagine, I didn't know that $lb() returns the simple string. I didn't know that I can write this string to file, read it from file, and then apply $LISTGET function to it. I didn't know $LISTGET function takes string type. I thought that $LIST is something more than just a string.

So the solution: