Posts by Eduard Lebedyuk on InterSystems Developer Community

Question

Eduard Lebedyuk · Sep 8, 2019

Is there a way to set null in dynamic object without using %Set methods?

I have this method and I need to set NULL as, well, null and not string.

ClassMethod node(name) [ CodeMode = expression ]
{
{
    "name":(name),
    "content":($case(##class(%Dictionary.ClassDefinition).%ExistsId(name), $$$YES:"mycontent", $$$NO:"NULL"))
}
}

#InterSystems IRIS

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Question

Eduard Lebedyuk · Sep 8, 2019

SQL condition in SELECT query

I'm writing "Finder"-like dialog and need to get list of BPL classes.

The query is dependent on current "path" - it outputs all BPLs in the current path (if any) and all sub-packages which contains BPLs.

So far I have this query:

#Business Process (BPL) #Ensemble

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Question

Eduard Lebedyuk · Aug 28, 2019

Run code on Business Process start

I want to execute initialization code on the start of my business process.

I thought OnInit is a way to go, but apparently not - ^dbg global remains empty:

Class Test.BP Extends Ens.BusinessProcess
{
Method OnInit() As %Status
{
    Set ^dbg = 1
    Quit $$$OK
}
}

Ideas?

#Business Process (BPL) #Ensemble

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Question

Eduard Lebedyuk · Aug 26, 2019

Best way of setting request stream property from BPL?

I have BPL BP and BO.

To call BO I need to populate the stream property of the request message.

What's the best way to do it?

#Beginner #Business Operation #Business Process (BPL) #Ensemble

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Question

Eduard Lebedyuk · Aug 17, 2019

Difference in JavaGateway handling of %GlobalBinaryStream / byte[] between InterSystems IRIS 2018.1.2 and 2019.1

I have two local instances:

IRIS for Windows (x86-64) 2018.1.2 (Build 626_3U) Wed Jun 12 2019 19:07:59 EDT
IRIS for Windows (x86-64) 2019.1 (Build 510U) Thu Mar 14 2019 14:13:37 EDT

I'm using Java Gateway to talk to external system.

Both instances are using the same:

jar
generated class
java version

They are calling the same method with this java signature:

#Java #InterSystems IRIS

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Discussion

Eduard Lebedyuk · Jul 31, 2019

CodeGolf: FizzBuzz

Let's have a round of CodeGolf!

As usual the goal is to write the shortest solution for a specified problem.

Today we have one of the classics: FizzBuzz.

Write a program that prints the numbers from 1 to 100.

But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”.

For numbers which are multiples of both three and five print “FizzBuzz”

#Code Snippet #Caché

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Question

Eduard Lebedyuk · Jul 23, 2019

DeepSeeWeb add markers to line chart

I have this fact table

CheckTime	Error	Marker (1 or 0)
2019-01-01 00:01:00	1	0
2019-01-01 00:02:00	5	1
2019-01-01 00:03:00	2	0

And the cube which is pretty much 1:1.

I have build an MDX:

#Analytics #Analyzer #InterSystems IRIS BI (DeepSee)

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Question

Eduard Lebedyuk · Jul 19, 2019

Can I determine inside Ensemble Job that Ensemble tries to shut down the job

From inside Business Service (OnProcessInput method specifically) I want to determine if Ensemble tries to shut down the job.

Is it possible? How?

#Business Operation #Business Process (BPL) #Business Service #System Administration #Ensemble

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Article

Eduard Lebedyuk · Jul 16, 2019 4m read

Classes, tables and globals - how it all works?

When I describe InterSystems IRIS to more technically-minded people, I always start with how it is a multimodel DBMS at its core.

In my opinion that is its main advantage (on the DBMS side). And the data is stored only once. You just choose the access API you want to use.

#Beginner #Best Practices #Globals #Object Data Model #Relational Tables #SQL #InterSystems IRIS

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Question

Eduard Lebedyuk · Jun 8, 2019

Set environment variable from terminal

How do I set environment variable for current process?

set env = "MYVAR"
set s = $ZF(-1,"export " _ env _ "=2048m")
set val = $system.Util.GetEnviron(env)
zw val

Returns val="" because $zf(-1) spawns new process.

#Red Hat Enterprise Linux (RHEL) #System Administration #Caché

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Question

Eduard Lebedyuk · Jun 7, 2019

Different XML projections for the same class

I have one persistent, xml-enabled class.
I need to convert objects of this class to XML.
However I need to project each object in different ways (depending on
where I send it), for example:

Different list of attributes are projected
Attributes have different names
...

Is there a way to do that with XML Adaptor?

#ObjectScript #SOAP #XML #Caché

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Question

Eduard Lebedyuk · May 29, 2019

Send request to BP on production start

How do I send request on production start?

Here's what I got so far in my production class:

ClassMethod OnStart(pTimeStarted As %String) As %Status
{
    job ..InitialTraining()
    quit 1
}

lassMethod InitialTraining() As %Status
{
    hang 5
    set sc = ##class(EnsLib.Testing.Service).SendTestRequest(...)
    quit sc
}

Is there a better way without hang, etc?

#Business Process (BPL) #Ensemble

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Question

Eduard Lebedyuk · May 17, 2019

Is there a way to get [ Internal, Private ] property?

I have a class defined like this:

Class test.ABC Extends %RegisteredObject   {

Property myProp As %Binary [ Internal, Private ];

}

Is there a way to get a value of myProp from outside of the object?

I can't modify or extend the class obviously.

#Object Data Model #ObjectScript #Caché

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Article

Eduard Lebedyuk · Apr 23, 2019 1m read

Python Gateway Part II: Installation

This series of articles would cover Python Gateway for InterSystems Data Platforms. Execute Python code and more from InterSystems IRIS. This project brings you the power of Python right into your InterSystems IRIS environment:

#AI #Languages #Machine Learning #Python #InterSystems IRIS

Open Exchange app

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Question

Eduard Lebedyuk · Apr 15, 2019

CacheGlobalOrder example to iterate over global and get data

I managed to use CacheGlobalOrder to iterate over global and return the next subscript:

#C++ #Callout #Caché

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Question

Eduard Lebedyuk · Apr 15, 2019

Iterate over %List/$lb in C

I'm using callin to get global values.

Here's a simple function to get string value from global and return it:

#Beginner #C++ #Callout #Caché

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Article

Eduard Lebedyuk · Apr 12, 2019 1m read

Python Gateway Part I: Introduction

This series of articles would cover Python Gateway for InterSystems Data Platforms. Leverage modern AI/ML tools and execute Python code and more from InterSystems IRIS. This project brings you the power of Python right into your InterSystems IRIS environment:

#AI #Best Practices #Languages #Machine Learning #Python #InterSystems IRIS

Open Exchange app

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Question

Eduard Lebedyuk · Apr 8, 2019

Can datatype redefine getter/setter?

I have a lot of string properties, which need custom but similar Getters and Setters.

Currently I'm generating Getter and Setter in class generation code but that expands class definition.

Is there a way to specify custom datatype which would generate custom getters and setters?

#Beginner #Object Data Model #Caché

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Article

Eduard Lebedyuk · Apr 8, 2019 4m read

Should we use computers?

The titular question was quite relevant and often discussed some thirty years ago. The thought went: “Sure, there are industries where computers are the norm, but in my industry we got just fine so far, the benefits are questionable, problems innumerable and unsolved. Can we continue as before or should we embrace this new technology?”

Today, everyone asks the same question but about Machine Learning and Artificial Intelligence. The doubts are the same – lack of expertise, lack of known path, perceived irrelevancy to the industry.

Yet, as before, the correct, even the only possible answer is a resounding yes. Read on to find out why.

#AI #Machine Learning #InterSystems IRIS

Open Exchange app

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Question

Eduard Lebedyuk · Apr 4, 2019

Remove last element from $lb property

How can I remove elements from $lb property? Specifically last element?
$list does not work with $lb properties.
$listupdate can't remove elements
The only solution I found is a temp variable and $list, but isn't there something better?

#Beginner #Code Snippet #ObjectScript #Caché #InterSystems IRIS

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