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Question
· Mai 7

How to prevent reentrancy inside same process ?

#InterSystems IRIS

I use the following code to protect some code for being called by multiple processes at same time :

lock +^TEMP("FOO"):0 //don't wait
quit:'$test
//critical section
//...
lock -^TEMP("FOO")

This works between processes but it does not prevent the same process entering critical section twice.

How to do that, is there any lock option ? I would like it to behave as the lock in C# or Java.

It's OK for me to use something else than LOCK instruction (eg : signals)

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Article
· Mai 6 13m de lecture

IRIS iRacing

#Embedded Python #Surveillance #Python #InterSystems IRIS

 Hello IRIS Fans and Welcome to IRIS iRacing!

Here were going to take 3 laps of your time and demonstrate how I wired up my Racing SIM to IRIS for "As Real Time as It Gets" Metrics reporting.  I missed the window for the contest, which happens quite often, but I still ended up 3rd I think in the demo race in the video below.

Technical Salad

Below are the technical ingredients for this demonstration for a salad you can post on Instragram.

 
User.iRacing.cls


Dont forget to do a:

set tSC = ##class(SYS.Monitor.SAM.Config).AddApplicationClass("User.iRacing", "USER")

Then you should see your new metrics on the /api/monitor/metrics endpoint.


Notable here is my python setup on Windows:

cpf

[config]
LibPath=
MaxServerConn=1
MaxServers=2
Path=
PythonPath=c:\Python\Python313\python.exe
PythonRuntimeLibrary=C:\Python\Python313\python313.dll
PythonRuntimeLibraryVersion=3.13
UUIDv1RandomMac=0
bbsiz=-1
console=,


iris_site.py
 

def set_site_path(platform_name):
    sys.path = sys.path + __sitegetsitepackages(['C:\\Python\Python313'])    
    sys.path = sys.path + ["C:\\Python\Python313\\Lib"]

Racing SIM

Below is the SIM specifications, complete with Driver.

Gluing it all together, we have a rolling SIM emitting, scraping and serving up iRacing metrics suitable for real time display.

As Real Time as It Gets

The excuse I made for myself to derive some real value of sorts out of this was I have always wanted to be as agressive as possible with data reporting from the source to the exporter, clear through the Prometheus Scrape and the eventual dashboard.  The python sdk is wicked fast, as it reads from a memory mapped file while in session, and the other components can be configured to be agressive, but just are not by default and took some edits and daemon reloads.

In order to make this work, I found the following tweaks for necessary:

grafani.ini

min_refresh_interval = 1s

prometheus.yml
1s scrape
 

  - job_name: 'iracing'     # Override the global default and scrape targets from this job every 5 seconds.
    scrape_interval: 1s
    scrape_timeout: 1s     # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.
    static_configs:
      - targets: ['192.168.1.193:52773']
    metrics_path: '/api/monitor/metrics'

Dashboard

Newly added refresh rate can be added, and "Refresh Live Dashboards"  should be enabled.


At rest it doesnt look like much, as its designed to be real time, but a screenshot is in order to see the 5 panels.

 
Grafana Dash



Demo

The video shows us putting the Dashboard and scraping to work in a quick 3 lap shootout at Darlington Motor Speedway.

🏆 This is considered an InterSystems Best Practice

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Question
· Mai 6

Troubleshooting REST Operation

#ObjectScript #REST API #InterSystems IRIS for Health #Health Connect #InterSystems IRIS

I am trying to replicate a REST call that I am able to make via a Postman call within a EnsLib.REST.GenericOperation.

It's been a while since I have messed around with trying to make external REST calls. When I execute my REST call, tSC is coming back with an error and I am trying to pinpoint why. I tried turning on ISCLOG = 5 but when calling the REST Operation from the Testing tool it is not logging anything to the ISC log.

How do we see the RAW request being sent out to verify that my request is formatted properly? tSC is coming back with an error as the message displayed in the error is "Error in sending request to server"

Method PostSearchPerson(pRequest As COM.REST.Msg.Request.PostSearchPerson.PostSearchPersonRequest, Output pResponse As COM.REST.Msg.Response.PostSearchPerson.PostSearchPersonResponse) As %Status

{

    #dim tSC As %Status = $$$OK

    set tHTTPRequest = ##class(%Net.HttpRequest).%New()

    set tHTTPRequest.SSLConfiguration = ..Adapter.SSLConfig

    set tHTTPRequest.Https = 1

    set tHTTPRequest.WriteRawMode = 1

    set tHTTPRequest.Port = ..Adapter.HTTPPort

    do tHTTPRequest.SetHeader("Host", ..Adapter.HTTPServer)

    Do tHTTPRequest.SetHeader("Accept-Encoding","application/json")

    Do tHTTPRequest.SetHeader("Content-Type","application/json")

    Do tHTTPRequest.SetHeader("api-key",..ApiKey)

    do tHTTPRequest.EntityBody.Write()

    do tHTTPRequest.OutputHeaders()

    set tRequest = ##class(%DynamicObject).%New()

    set tRequest.searchString = pRequest.searchString

    set tPayload = tRequest.%ToJSON()



    set tURL=..Adapter.URL_"/persons/search"

    set tSC = tHTTPRequest.EntityBody.Write(tPayload)

    set tHTTPResponse = ##class(%Net.HttpResponse).%New()

    set tSC = ..Adapter.SendFormDataArray(.tHTTPResponse, "POST", tHTTPRequest, tURL, tPayload)

    if $$$ISERR(tSC) {

        set tSC = $$$ERROR($$$GeneralError, "Error in sending request to the server")

        quit tSC

    }

    set responseData = {}.%FromJSON(tHTTPResponse.Data)

    set pResponse = ##class(COM.REST.Msg.Response.PostSearchPerson.PostSearchPersonResponse).%New()

    set tSC =  pResponse.%JSONImport(responseData)



   quit tSC

}

Thanks

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Question
· Mai 6

Converting an HL7 message input into a JSON string in a txt file

#HL7 #JSON #Question clé #InterSystems IRIS for Health

Hi everyone,

I’m new to this community and could really use some help with creating a production in InterSystems IRIS for Health Community 2024.3. I have deployed my instance using Docker.
Here’s what I’m trying to do:

  1. Input: I have an HL7 file that is processed by the standard EnsLib.HL7.Service.FileService.
  2. DTL Transformation: I’ve created a DTL to transform the HL7 content into a custom class like this:
Class Demo.MyApp.Messages.JSONEvent5 Extends (%Persistent, %JSON.Adaptor)
{
Property rawpatientid As %String;
Property rawpatientfamilyname As %String;
Property rawpatientgivenname As %String;
Property rawpatientbirthdate As %String;
Property rawpatientgender As %String;
Property rawlocalisation As %String;
Property rawencounternumber As %String;
Property rawpractitionnerid As %String;
Property rawsiteid As %String;
}

This setup allows me to create my DTL with Demo.MyApp.Messages.JSONEvent5 as the target class.

However, I’m stuck after this step. I need to take the result of the DTL transformation and export it into a .txt file using a Business Operation, which will export the file in a specified folder.

I've read a lot about the JSON Adaptor, but I’m having trouble applying it in my case. I tried to create a custom Business Process that applies the DTL and then converts the result to a string using %JSONExportToString, but it’s not working as expected.

Could anyone share an example or guide me on how to properly set up this production ? I’d really appreciate any insights or recommendations.

Feel free to ask if you need more details.

Kind regards,

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