Posts by Nikita Savchenko on InterSystems Developer Community

This discussion is open to anyone who use or know about WebTerminal project. It is a result of a long story of the project development, testing and maintaining.

#Caché #Terminal #ObjectScript #Frontend

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Nikita Savchenko · Mar 30, 2017

How to Output Binary Data with REST

Hello!

My goal is to serve files using REST classes only (no filesystem should be used), and I am a halfway far from it.

What I am succeeded in, is serving character files (html/css/javascript/etc) using the next approach:

#Object Data Model #ObjectScript #REST API #Caché

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Nikita Savchenko · Jan 1, 2017

Is it Possible to Change the Current Device to be Terminal?

Hello community!

After reading a lot near InterSystems's Jobs and Terminal I/O documentation sections multiple times, I still does not understand one concept.

Maybe this question will be kind of incorrect, but please take it as is: is it possible to change the current device to be terminal device?

Let me explain what I want to achieve.

#Caché #Terminal

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Nikita Savchenko · Nov 5, 2016

How to log out from a web application?

Hello!

The question I have today is the next. Suppose I have this simple class describing the REST application:

#Caché #SOAP

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Nikita Savchenko · Nov 2, 2016

Startup Tag^Routine property for UnknownUser

Hello community!

I am trying to set up Startup Tag^Routine field for the UnknownUser as follows:

And my simple routine is the next:

#Caché #Terminal #Access control #System Administration

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Nikita Savchenko · Aug 24, 2016

Caché Installation Unique Identifier

Hello community!

Is there any method/property/way in Caché to obtain something like unique identifier for installed Caché system? The idea is to get the identifier that will differ on any other installation/machine/etc, but will forever remain the same for the current installation, even if $zv changes (in case of update) or any data is removed from the database.

#Caché #ObjectScript

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Nikita Savchenko · Jun 14, 2016

Get variables list

Hello!

In Caché there is a way to print all current variables using write command without arguments:

USER>set Einstein = 1879
USER>set Mozart = 1756
USER>write
Einstein=1879
Mozart=1756

But is there a way to get a list of this variables? I am looking for something that would return value like $LB("Einstein", "Mozart") for this case.

Thanks!

#Caché #ObjectScript

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Nikita Savchenko · Jun 6, 2016

Is there a way to reassign $ZPARENT JOBbed process variable when parent process terminates?

Hello!

I have a WebSocket application which spawns new process using JOB command.

Sometimes WebSocket connection can be terminated, and in the meantime I need to hold spawned process alive until it can be associated with the new WebSocket connection. (Do not suggest serializing process state here instead please)

#ObjectScript #Caché

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Nikita Savchenko · Jun 1, 2016

What is the best way to serialize object/list/array/etc to string?

Hello!

Are there any short ways of serializing COS entity to the string? I am searching for something like .$toJSON() , but I need Caché 2013.* support.

The one way I supposed to work is to use $listbuild:

set str = $LISTTOSTRING($LB(1,2,3,",",5))
set list = $LISTFROMSTRING(str,",")
zw list
list=$lb("1","2","3","","","5")

#Caché #ObjectScript

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