Posts by Nikita Savchenko on InterSystems Developer Community

Discussion

Nikita Savchenko · Dec 12, 2019

Package Manager for InterSystems: the Design Question to All Engineers

Hello, InterSystems community!

Lately, you have probably heard of the new InterSystems Package Manager - ZPM. If you're familiar with it or with such package managers as NPM, Dep, pip/PyPI, etc. or just know what is it all about -- this question is for you! The question I want to arise is actually a system design question, or, in other words, "how should ZPM implement it".

#InterSystems Package Manager (IPM) #ObjectScript #Caché #InterSystems IRIS

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Article

Nikita Savchenko · Feb 12, 2019 13m read

How to Develop InterSystems Applications in Your Favorite IDE

ˮ This is one of my articles which was never published in English. Let's fix it!

#Development Environment #Frontend #JavaScript #JSON #Node.js #ObjectScript #UI Development #InterSystems IRIS #Open Exchange

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Article

Nikita Savchenko · Jan 5, 2019 6m read

Explore Text Data with InterSystems iKnow Entity Browser

#Analytics #API #Frontend #Graph #Open Source #Visualization #InterSystems Natural Language Processing (NLP, iKnow) #InterSystems IRIS #Open Exchange

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Question

Nikita Savchenko · Nov 26, 2017

What is the Best Way to Rename Persistent Classes which Already have Data?

Hello!

Suppose I have a package with classes which I want to rename. All these classes are persistent and they already have a lot of data stored.

The best I can think of to do is the following:

#Object Data Model #ObjectScript #Caché

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Question

Nikita Savchenko · Nov 12, 2017

How to Get Old %Persistent Object Properties in %OnBeforeSave?

I am trying to make Caché perform certain actions depending on whether a particular property of the object was changed using triggers.

For example, say I have this class:

#Object Data Model #ObjectScript #Caché

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Question

Nikita Savchenko · Jun 15, 2017

WebTerminal Over Telnet Is Possible. Should It Born? (v5) Open Discussion.

This post is originally posted on GitHub.

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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Question

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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Announcement

Nikita Savchenko · Jan 19, 2017

Caché WebTerminal v4 Release

Greetings, InterSystems community!

I am pleased to announce that the web terminal project, Caché WebTerminal version 4 gets its release! After long period of enhancing this web application from 2013, it came to the version 4, which features major stability and security improvements, intelligent autocomplete and syntax highlighting, convenient SQL mode and a lot of other useful features.

The goal of this article is to spread the knowledge about this project over the InterSystems community.

#Development Environment #JavaScript #ObjectScript #System Administration #Terminal #Tools #Frontend #Caché #Open Exchange

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Question

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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Question

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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Question

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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Question

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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Question

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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Question

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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Question

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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Article

Nikita Savchenko · May 9, 2016 1m read

After publishing a saved draft, the post date should be the date of publishing

Hello developer community developers!

Thanks for all of features you create.

I encourage the one simple issue again and again when posting articles. Would be happy if it get fixed.

When publishing an article draft, the date of the post should be the date of publishing, but not the date when the draft was created.

#DC Feedback

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Article

Nikita Savchenko · May 6, 2016 8m read

Installing Caché Applications Using Class Projections

Greetings! This article describes yet another simple way of creating installers for the solutions based on InterSystems Caché. The topic covers applications, which can be installed or completely removed from Caché with one action only. If you are still documenting installation instructions that have more than one step to do to install your application — it’s high time you automated this process.

#Compiler #Deployment #Object Data Model #Terminal #Caché

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Article

Nikita Savchenko · Apr 1, 2016 6m read

ObjectScript Class Explorer - Exploring ObjectScript Classes in the UML Notation

Hello!

This article is a small overview of a tool that helps to understand classes and their structure inside the InterSystems products: from IRIS to Caché, Ensemble, HealthShare.

In short, it visualizes a class or an entire package, shows the relations between classes and provides all the possible information to developers and team leads without making them go to Studio and examine the code there.

If you are learning InterSystems products, reviewing projects a lot or just interested in something new in InterSystems Technology solutions — you are more than welcome to read the overview of ObjectScript Class Explorer!

#Best Practices #Object Data Model #ObjectScript #Tools #Visualization #Caché #Ensemble #HealthShare #InterSystems IRIS #Open Exchange

Open Exchange app

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