InterSystems FAQ rubric

The ^%GCMP utility can be used to compare the contents of two globals.

For example, to compare ^test and ^test in the USER and SAMPLES namespaces, it would look like this:
*In the example below, 700 identical globals are created in the two namespaces, and the contents of one of them is changed to make it the detection target.

USER>kill^test
USER>for i=1:1:100 { forj=1:1:7 { set^test(i,j)="Test"_i } }
 
USER>zn"samples"// change namespace to SAMPLES
SAMPLES>kill^test
SAMPLES>for i=1:1:100 { forj=1:1:7 { set^test(i,j)="Test"_i } }
 
SAMPLES>set

I’ve been exploring options for connecting Google Cloud Pub/Sub with InterSystems IRIS/HealthShare, but I noticed that IRIS doesn’t seem to ship with any native inbound/outbound adapters for Pub/Sub. Out of the box, IRIS offers adapters for technologies like Kafka, HTTP, FTP, and JDBC, which are great for many use cases, but Pub/Sub appears to be missing from the list.

Has anyone here implemented such an integration successfully?

For example:

• Would it make sense to leverage IRIS’s Business Service + REST API adapter to connect to Google’s Pub/Sub REST endpoints?
• Or perhaps use an intermediate

I joined InterSystems less than a year ago. Diving into ObjectScript and IRIS was exciting, but also full of small surprises that tripped me up at the beginning. In this article I collect the most common mistakes I, and many new colleagues, make, explain why they happen, and show concrete examples and practical fixes. My goal is to help other new developers save time and avoid the same bumps in the road.

1. Getting lost among system classes and where to start

The issue: ObjectScript/IRIS ships with many system classes and packages (%Library, %SYS, %Persistent, %SQL, etc.).

Introduction

HL7 messages often contain multiple repeating segments such as NTE, AL1, OBX, ZTX, DG1, and others. These segments sometimes require individual processing and routing to different downstream systems. This technical paper introduces a configurable template designed to automate the splitting of these repeating HL7 segments, improving message handling and integration efficiency.

One of the most common kinds of integration we are asked to do is emailing. One of the most typical email services our customers use is Microsoft’s Office 365. After setting up the right configuration on the Microsoft side, we can email from IRIS with two HTTP requests. By the end of this article, we will be able to send an email with an attachment through our Microsoft 365 service!

Microsoft’s REST API, called Graph, allows you to do a lot of things within Microsoft’s various apps, and it is precisely what we will employ to send our email.

Hello Community

The InitialExpression keyword values does not to set default values for properties in classes that extend %CSP.Page, unlike in other class types such as %Persistent or %RegisteredObject, where it works as expected during object instantiation (typically via %New()).

1. Is %CSP.Page instantiated using %New() under the hood, or does it use a different initialization mechanism?
2. Are there specific limitations or behaviors in CSP pages that prevent InitialExpression from working as expected?

Thank you!

The utility returns the desired values from the text and display the multiple values if exists based on starting and ending string.

Class Test.Utility.FunctionSet Extends %RegisteredObject
{

/// W !,##class(Test.Utility.FunctionSet).ExtractValues("Some random text VALUE=12345; some other VALUE=2345; more text VALUE=345678;","VALUE=",";")
 

ClassMethod ExtractValues(text As %String, startStr As %String, endStr As %String) As %String
{    //Initialize Valriables
   Set values = ""
   Set start = 1
   
   While start '= 0 {
 Set start = $FIND(text, startStr, start)
 IF start = 0 { QUIT }
     Set end = $FIND

Finishing my previous example for multiple IRIS instances, I tried
to compose a local single instance version.  The step from the external
Python app to a version using embedded Python seemed to be obvious.
This was a wrong assumption, as some Python libraries just refused installation
into my local Windows-based environment.

Your Mission

Let's pretend for a moment that you're an international action spy who's dedicated your life to keeping the people of the world safe from danger. You recieve the following mission:

Good day, Agent IRIS,

We're sorry for interrupting your vacation in the Bahamas, but we just received word from our London agent that a "time bomb" is set to detonate in a highly populated area in Los Angeles. Our sources say that the "time bomb" is set to trigger at 3:14 PM this afternoon.

Hurry, the people are counting on you!

The Problem

You rush to your feet and get ready to head to Los Angeles,

Actually, I want to know specific production component status. I used "Ens.Config.Production" to get the status of component. But it will return only the component enabled/disabled. Anyone is having any Idea to get the specific production component status?

Hi,

so we introduced GIT in our workflow and we exported all files with $SYSTEM.OBJ.ExportUDL

Everything fine so far. But for some reason the export adds an extra line for classes (Routines are OK as far as I can see):

On Serverside it isn't there

The Problem is now that when we checkout a branch and a class changed we automatically compile it from the repository to a namespace that is made for the developer. E.g. DEV_001, DEV_002 and so on. 

Now when the class get's compiled the objectscript plugin replaces the local version with the version that the server compiled, so the last line get's

A benefit of using Doxygenerate is that Doxygen does more than just HTML output. Tweak the Doxyfile that tells Doxygen what to do and you can easily create a PDF. Our example MARINA application yielded a 524-page PDF. Here's what page 94 looks like:

You can browse the whole file here.

In the screenshot above, notice how we only get details of the superclass that is part of the app (AuditHistory). The primary superclass, %Library.SerialObject, is shown faded and with no details of what BankDetails inherits from it.

With another tweak to the Doxyfile we can show full inheritance detail in a 586-pag

InterSystems FAQ rubric

If you want to raise an arbitrary custom error in a TRY block, you can pass an exception with a throw as follows. In the following example, a custom error is raised if Stcount is less than 1.

Class User.Test
{

ClassMethod ExceptionTest()
 {
    try
    {
      // : some codesif (Stcount<1) {
          throw##class(%Exception.General).%New("User-defined error", "5001", "location", "Data at location error")
          // User-created errors are 5001 and above
      }
    }
    catch ex
    {
      write"Errors #", ex.Code, ": ", ex.Name, " : ",

Hi folks!

Sometimes, when designing a class method and feeding it with more and more useful features, very soon the number of parameters can reach 10 and even more.

It becomes pretty difficult for users of useful methods to remember the position of the important parameter, and it is very easy to misuse the position and transfer the wrong value to the wrong parameter.

Here is an example of such a method (I asked GPT to create a method with 20 params):

ClassMethod GenerateReportWith20Params(
    pTitle As%String = "",
    pAuthor As%String = "",
    pDate As%String = "",            // e.g. 2025-09-03
    pCompany As%String = "",
    pDepartment As%String = "",
    pVersion As%String = "1.0",
    pFormat As%String = "pdf",       // pdf|html|docx
    pIncludeCharts As%Boolean = 1,
    pIncludeSummary As%Boolean = 1,
    pIncludeAppendix As%Boolean = 0,
    pConfidentiality As%String = "Public",
    pLanguage As%String = "en",
    pReviewers As%String = "",       // CSV, e.g. "Alice,Bob"
    pApprover As%String = "",
    pLogoPath As%String = "",
    pWatermarkText As%String = "",
    pColorScheme As%String = "default",
    pPageSize As%String = "A4",
    pOrientation As%String = "Portrait",
    pOutputPath As%String = "report.pdf"
) As%Status
{

// implementation
}

InterSystems IRIS interoperability production development involves using or writing various types of components. They include services (which handle incoming data), processes (which deal with the data flow and logic), and operations (which manage outgoing data or requests). Messages flowing through those components constantly require being adapted to consuming applications. Therefore,Data transformations are by far the most common component in interoperability productions.

In the early stages of data transformation development, thetest tool from the Management Portal becomes quite handy.

I had a need for a Filter, but did not want to recreate the wheel by creating another Data Lookup Table, so instead I created a Linked Table that points to a MS SQL Table outside of IRIS.

Once I had the Linked Table, I created a Class Method Function that would query the Linked Table and return a 1 if a result came back.

ClassMethod CheckPDMProviderType(pInput As%String) As%Boolean
{
    set ExtDisplay = ""
 		&sql(SELECT SecurityGroup_k INTO :ExtDisplay
        FROM osuwmc_CPD_SQL.Ref_SecurityGroup WHERE PDMExtDisplay = 1AND SecurityGroup_k = :pInput)
    if ExtDisplay = "" {
        q

Hi,

I need a custom operation on patient type that will receive a business identifier and will search them and for each paient it will return a $everything for all the found patients written with object script

Hello,

I'm trying to get the Reply Action Code to work with the error message text.

I have this ACK:

MSH|^~\&|APP|FACIL|||20250821143621||ACK|CUEACK_20250821143621|P|2.4
MSA|AE||Failed to queue message

This is some of the Action Codes I've tried:

• E*Failed to queue message=S
• E*Failed=S
• E*"Failed to queue message"=S
• :E*Failed to queue message=S
• :?E*Failed to queue message=S

It's not suspending the message however.

What am I doing wrong?

Thank you

I’m pleased to announce the release of tree-sitter-objectscript, a new open-source tree-sitter grammar that brings first-class ObjectScript support to modern editors. If you caught the preview at READY ’25, you’ll be glad to know it’s now up on Github:

https://github.com/intersystems/tree-sitter-objectscript

What Does It Provide?

• Fast & Precise Parsing: A powerful grammar for ObjectScript, enabling real-time syntax parsing, smart highlighting, and structural editing in modern code editors.
• Polyglot-Awareness: ObjectScript .cls files often embed SQL, HTML, Python, JavaScript, JSON, CSS, XML, and

While starting with Intersystems IRIS or Cache, developers often encounter three core concepts: Dynamic Objects, Globals & Relational Table. Each has its role in building scalable and maintainable solutions. In this article, we'll walk through practical code examples, highlight best practices, and show how these concepts tie together. 

1. Working with Dynamic Objects:

Dynamic objects (%DynamicObject and %DynamicArray) allow developers to manipulate JSON-like structures directly in Objectscript. They are especially useful for modern applications that need to parse, transform or generate JSON.

Exam

Hi folks!

Consider I have a class "X.Y.Z"

What is the SQL table name for it? How can I obtain it via ObjectScript? 

A quick search doesn't show any methods and properties. Documentation is a bit "wrong" here saying that the SQL table name is the same. It will be at least 'x_y.z'.

Any help is very appreciated!)

Dynamic Entities (objects and arrays) in IRIS are incredibly useful in situations where you are having to transform JSON data into an Object Model for storage to the database, such as in REST API endpoints hosted within IRIS. This is because these dynamic objects and arrays can easily serve as a point of conversion from one data structure to the other.

Dynamic Objects

Dynamic Objects are very similar to the standard ObjectScript object model you get when you create a new instance of a class object, but with some key differences:

• Dynamic objects have no real type, other than being a

Introduction

What's in a name? That which we call a rose
By any other name would smell as sweet

William Shakespeare, "Romeo & Juliet"

In this article, we will describe a set of naming conventions for ObjectScript code.

Hello
I want to get the property of a class, sorted by order in storage.

I know we can use
 

Set definition = ##class(%Dictionary.ClassDefinition).%OpenId(className)
        Set listProperty = definition.Properties
        For ii = 1:1:listProperty.Count(){
                    write listProperty.GetAt(ii).Name

But using GetAt sorts the results alphabetically.

Example :

Class Test.classExtends (%SerialObject, %XML.Adaptor, %JSON.Adaptor)
{

    Property tiers As%String;Property journal As%String;
}

listProperty.GetAt(1).Name = "journal" and listProperty.GetAt(2).Name = "tiers"

Bu

This article is a continuation of the IRIS JSON project and features additional methods and insights.

Let's continue with the instance methods

%GetTypeOf(Key)

This instance method is used to determine the JSON data type of the %DynamicObject or %DynamicArray.

It returns one of the following strings:

USER>Set array = [1,"test",true,12.3256

This great article sparked some recent private discussion, and I'd like to share some of my own thoughts from it.
The motivating concern boils down to: Why do we need coding rules or conventions at all? What happened to the wonderful era of the Renaissance artist-programmer forging their own path, prior to being supplanted by the craftsman and now (even worse) by AI?
In short, there are a few reasons why coding standards/guidelines are useful, and the Renaissance artist-programmer is not entirely gone.

Reason 1: These days, when you’re training a true novice artist, you start out by having them

Hi Everyone,
Please suggest/share best practices and sample questions that would help me to secure InterSystems HL7 specialist Certification.

I have a custom Buffer class which is designed to capture written/printed statements to the device, to be able to transform the captured text to string or stream type. I have used this in ObjectScript to capture ObjectScript write statements and return a string. I would like to try to use this with a [ Language = python ] method as follows. This class will be called by a scheduled task.

/// ObjectScript code which initializes buffer to capture statements written in nested method callClassMethod CollectStringFromBuffer() 
{
    set buffer = ##class(CustomClass.Buffer).%New()
    do

Hello, how are you?

First of all thanks for your time reading this question.

We are investigating how to validate the indexes of a global. We have read:

https://docs.intersystems.com/irisforhealth20251/csp/docbook/DocBook.UI…

And:

https://docs.intersystems.com/irisforhealth20251/csp/documatic/%25CSP.D…

We want to validate the inxedes of the global titled "Ens.Util.LogD". We have executed on the ObjectScript terminal, on the desired namespace:

ESBSSCC>set tSC =

Reviewing my published packages, I identified a nasty bug in IRIS Native API

• There is a method in  %Net.DB.Iris named function ()
• It's equivalent to  ObjectScript $$label^routine(param) 
• It used to work fine 2 years ago, when I published my command-line-extension packages
• Now it is broken since at least 1 year and throws <PROTECT>
• I identified it for ObjecScript, Java, Python, Node.js
• It is reported as WRC# 1002589
• For all 4 cases, I also verified a workaround
  • Instead of calling an ObjectScript Function you call a Classmethod
  • It's by %Net.DB.Iris ClassMethodValue(...)
  • And you have