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#Beginner

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Beginner tag unites articles and questions for those who are getting started with InterSystems Data Platform

This is a beginner’s guide to the design of a “MicroService” implemented in Ensemble. “MicroService” is a popular phrase these days which has a broad interpretation. My interpretation is: “MicroService” is a “NoSQL Service”. A what? The answer is in the article.

We learnt what the difference is between SQL and NoSQL databases. For me the difference is nearly the same between a SOA Web Service and a “MicroService”. I am going to explain it through an example.

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Can anyone suggest suitable Cache ObjectScript syntax for open/use/read statements on a simple ms-dos text file.
I've tried various examples seen on the web but they appear to be implementation specific.
I used MSM MUMPS many years ago but am now retired & would like to write a few simple routines for my own amusement & mental challenge.
I am using the free Version of Cache (V 2017.1) on my Windows 10 PC. The installation file was CachePCkit_x64.exe
My apologies for this query being very basic.

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Article
· Feb 15, 2021 17m read
Four Database APIs

A concurrent session in IRIS:
SQL, Objects, REST, and GraphQL

Kazimir Malevich, "Athletes" (1932)

"But of course you don't understand! How can a person who has always traveled in a horse-drawn carriage understand the feelings and impressions of the express traveler or the pilot in the air?"

Kazimir Malevich (1916)

Introduction

We’ve already addressed the topic of why object/type representation is superior to SQL for implementing subject area models. And those conclusions and facts are as true now as they have ever been. So why should we take a step back and discuss technologies that drag abstractions back to the global level, where they had been in the pre-object and pre-type era? Why should we encourage the use of spaghetti code, which results in bugs that are hard to track down, and which relies only on virtuoso developer skills?

There are several arguments in favor of transmitting data via SQL/REST/GraphQL-based APIs as opposed to representing them as types/objects:

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Article
· Aug 1, 2019 3m read
Nested set model for ObjectScript

In many projects I was faced with storing hierarchical data (tree) in classes.
By tree, I mean such data, where each node has a parent node — an object of the same class.
Many examples of such data can be given. For example, a catalog in the online store. Suppose that this online store sells books, in this case, the category tree might look like this:

Open Exchange app
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Keywords: Jupyter Notebook, Tensorflow GPU, Keras, Deep Learning, MLP, and HealthShare

1. Purpose and Objectives

In previous"Part I" we have set up a deep learning demo environment. In this "Part II" we will test what we could do with it.

Many people at my age had started with the classic MLP (Multi-Layer Perceptron) model. It is intuitive hence conceptually easier to start with.

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The last time that I created a playground for experimenting with machine learning using Apache Spark and an InterSystems data platform, see Machine Learning with Spark and Caché, I installed and configured everything directly on my laptop: Caché, Python, Apache Spark, Java, some Hadoop libraries, to name a few. It required some effort, but eventually it worked.

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Question
· May 17, 2017
Soap Wizard

HI,

Please let us know the solution to the below error:

ERROR:#5388 - You do not have write permission on the database class .
%SOAP.WebClient is in , so class lock cannot be obtained .

Thanks,
Shobha

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Hello,

I am a beginner with Object Script and I hope anyone can help me solving my questions.

1. Is there a way to time a loop in Object Script?

2. My code leads to the following error, even though it executes the method.

Is there a way to ignore this specific error, so that I can repeat my code in a time loop over and over again without stopping?

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Here you have an easy way to write and execute COS code from your unix scripts. This way one does not need to write routines or even open Studio or Atelier. It can be an option for simple and small actions for instance things like installation tasks or compiling.

See sample bash script (compile.sh) to compile classes:

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Here I’ll walk you through the process of creating a simple Node/Express API and connect it to a InterSystems IRIS instance.

I won't go into much detail about how to work with any of the technologies I will mention in this tutorial but I will leave links, in case you want to learn more.

The objective here is to give you a practical guide on how to set up and connect a node.js back-end API to IRIS.

Before we get our hands dirty, make sure you have Node.js running on your machine. So I'll check:

Open Exchange app
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Hi,

I have very recently started to work with Ensemble and have both the 2014 and the 2017 version.

To learn, I have created a small test flow that takes an xml file using EnsLib.EDI.XML.Service.FileService, sends it to a Process that transforms it with xslt into another format, and then passes it onwards to a EnsLib.EDI.XML.Operation.FileOperation Business Operation.

This is the code that I have before and when sending it onwards:

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Atelier Users:

Has anyone found an Eclipse plug-in that provides the capability to connect to a Caché server and give the user a way to write SQL queries using the tables from that server? I'm picturing something like a "WinSQL"-client built as an Eclipse plugin.

I've found and tried the following, but I couldn't get it to connect to my local Caché instance.

http://eclipsesql.sourceforge.net/

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I'd like to have production specific settings for different environments (OTAP). I have set the system default settings on my production to override the default settings. However, this does not seem to work. It is my understanding that the system default settings override the settings I have set on the production (I thought I heard my Sales Engineer say this). However, reading the documentation I am not sure of this reading either. However, when I clear the values for the adapters on my production my system default settings are still not apply.

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The InterSystems Iris Fhirserver running on a Raspberry Pi Raspberry running as a FHIRserver

Raspberry running as FHIRserver

About a year ago I wrote some articles about the installation of the HAPI FHIRserver on a Raspberry Pi. At that time, I only knew the basics of the FHIR standard, little about the technology behind FHIR-servers and not much more about the Raspberry. By trying, failing, giving up and trying again I learned a lot.

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I have this local, containing a list of books of arbitrary length:

set books=2
set books(1, "author") = "Alice"
set books(1, "title") = "Hello"
set books(1, "pages") = "123"
set books(2, "author") = "Bob"
set books(2, "title") = "World"
set books(2, "pages") = "456"

And I want to generate this PDF (there could be more than two tables), each book is a separate table:

The header is always the same (Author, Title, Page) but the number of tables would be different.

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hi,

1. Created a class(test) and added a classmethod(checkdata).

2. Assigned a object with xml.

3. Created a new class for response and initialized in classmethod(checkdata).

4. Created a new class for request parsing with list of object parameter.

5. While parsing xml in request for list of object, the result count is "0". But the xml has value for "2" object list.

6. XML has follow:

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Ok so I am way outside of my comfort zone, and had to build an application using CSP to give users the ability to access SQL configuration tables. These SQL Configuration tables will affect the data that is sent to the downstream system.

I saw in the examples where we were able to import GIF's/IMAGES into the CSP folders to use as a reference in our CSP pages. My question is how do you do that? If I try to import through studio, it tells me the file is invalid.

Just trying to make it a little more user friendly then blocks on a page.

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Hi

Totally new to IRIS and Cache.

Trying to evaluate it and work out how we could use it.

As a standard application database. Object or relational etc. does not matter.

Issue is ObjectScript.

So:

1) Can we develop, maintain and use an IRIS database and never use ObjectScript i.e. use only Java, Python, C++ interfaces etc. (exactly which one does not matter)? Would that make designing and using the IRIS database more prone to inefficiency and error?

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I have a service that takes a file and pass it through to the production .While I am passing the file through I get the file stream and set it to a variable within my message and the variable is of type %Ens.StreamContainer. But after all processing and I need to write out my file to a pdf format The file gets written but is a corrupt file since I can not read it I have tried this with asimple pass through everything is fine .But here I do not know what I am doing wrong here is the operation code

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Hi.. I have an issue where we are using OAuth2.0 with the ZAUTHENTICATE routine. Once our token is validated we are using a users lan id (passed on the ID token) to find a software defined username in a Cache Global.

That is all working fine in ZAUTHENTICATE.. I am setting the software defined username in the Properties("Comment") array and wanting to reference it in the Rest Service Dispatch class.

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Article
· May 2, 2017 1m read
Atelier Tutorial Videos - Introduction

Greetings fellow Atelier users! To help new users get started, we are planning to make a list of video tutorials (e.g., how to create an Atelier project). The first one is "Introduction to Atelier", which is a brief tour of the Atelier user interface. We'd appreciate it if you could watch this video and let us know your comments. We'll be relying on your feedback to create more video tutorials to make it easier for new users to learn Atelier.

Please feel free to post your comments below. We look forward to hearing from you!

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Thanks for all replies in advance. In monitoring our audit log we are getting the error below. We have 4 different servers running CACHE 2014.1.1 and this is happening on all 4 of them. I have not been able to find what process is trying to logon but it is happening every 30 minutes. We have no user processes that are running so this has to be a CACHE process. Does anyone have an Ideal what could be running to cause this? What kind of trace can I run to determine what process is running it?

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I am using the EnsLib.RecordMap.Operation.BatchFileOperation to write a batch to a file but for some reason this has been working fine as of yesterday I had a problem with the cache databases filling up running out of memory so had to compact my database and gain space now when I run the operation I get the above error .Of course in my batch table there is no batch record with ID 1.The message is passed with the correct header information but still get this error any suggestions why?

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