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Announcement
· Dec 3, 2018
DC October-November 2018 release

Hi Community!

As you know or maybe guess we keep working on making Developer Community a better place for you, developers on InterSystems Data Platforms.

And here is the release on what we did in October-November.

Key visible enhancements:

better monthly digests,

InterSystems Best Practices,

Speed up mailings.

And a lot of small, but nice things - check the details inside.

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Hi fellow developers!

Curious if you guys use CreatedAt and LastUpdated properties in your classes?

Created to stamp when the record was created and LastUpdated when it was last updated. Where it can be useful - almost everywhere )) I find it convenient in records sorting (e.g. by creation or last update), in sync (with other systems), and so on, for better analytics.

Do you use it all the time for all the classes?

If don't, why not? What do you use instead?

What property type do you use - %TimeStamp? %DateTime?

What is the best practice to have CreatedAt filled automatically during creation and LastUpdated on every successful save (guess it could be in %OnSave)?

Please share your experience /thoughts?

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RabbitMQ is a message broker that allows producers (those who send a data message) and consumers (those who receive a data message) to establish asynchronous, real-time, and high-performance massive data flows. RabbitMQ supports AMQP (Advanced Message Queuing Protocol), an open standard application layer protocol.
The main reasons to employ RabbitMQ include the following:

  • You can improve the performance of the applications using an asynchronous approach.
  • It lets you decouple and reduce dependencies between services, microservices, and applications with the help of a data message mediator, meaning that there is no need for producers and consumers of exchanged data to know each other.
  • It allows the long-running processing of sent data (with the results) to be delivered after utilizing a response queue.
  • It helps you migrate from monolithic to microservices, where microservices exchange data via Rabbit in a decoupled and asynchronous way.
  • It offers reliability and resilience by making it possible for messages to be stored and forwarded. A message can be delivered multiple times until it is processed.
  • Message queueing is the key to scaling your application. As the workload increases, you will only have to add more workers to handle the queues faster.
  • It works well with data streaming applications.
  • It is beneficial for IoT applications.
  • It is a must for Bots’ communication.

Open Exchange app
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Hi,

I tried to create what is know as a "class variable". As far as I understand the only analogy to class variables would be the "class parameters".

I tried to use a class parameter but I cannot change its value at runtime.

Parameter STATUSES = {{}};

Property repr As %String;

Method %OnNew(repr) As %Status
{
w ##class(Test...).#STATUSES
w ..#STATUSES

...

}

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Hi ,

I receive xml as incoming request , I convert that into HL7 in my business process class as below

Set tSC = $CLASSMETHOD("myDTL","Transform", .pRequest,.dtlRes)

then , I am sending the dtlRes which is a HL7 message to a router "TEST_ROUTER"

in the router , I am checking for HL7.{MSH:9.2} , where I am getting below error :

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Question
· Dec 4, 2023
Custom Application Metric

I made a custom application metric, imported it to the USER namespace and used:

set status = ##class(SYS.Monitor.SAM.Config).Add.ApplicationClass("historymonitor.errorSensor", "USER")

to add it. When I do 'w status' it returns 1 so it is added but I still can't see the custom metric in the api/monitor/metrics endpoint. Even though I added %DB_USER in the application roles for api/monitor.

Does anyone know where the problem might be that the metrics endpoint still doesn't show my metric?

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Question
· Apr 17, 2023
Refreshing Combo

Hi Guys

How can I refresh a dataCombo after saving a new element in it?

I've the following dataCombo and after saving a new element I would like to fresh and reload that data in it?

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I have an operation using $ZF this operation ran and did not error but the job has been active and it can not be stopped I have tried stopping it from the front end and through the terminal using ##class(ENSLIB.Job).%New() Stop method. Now my production will not update even if I add a new item to the production I cannot update the item is there a way to force stop this job.

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Ok, I am attempting to clarify the required use of the RESIZE command, when you have a UNIVERSE or a UNIDATA DB attached to Cache. Traditional UNIVERSE / UNIDATA databases 'require' that hashed files be re-sized according to historic use, to prevent file overflow (aka. performance issues). It is not clear if that requirement is fully eliminated by attaching one of these databases to Cache. It is clear that, if you do not allocate 'enough' space on Cache for the database 'as a whole', that is a problem.

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Hi

Is there a way to generate an MD5 checksum of a file by performing a checksum against the file's parts? We potentially have to process large files and therefore cannot keep the entire file in memory. From what I understand checksum related logic is typically stateful, allowing file data to be passed through sequentially, however it appears cache script offers only stateless functions offering a simple method of generating a single checksum hash from a single string (or stream), correct me if I'm wrong?

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Hello Community!

A new challenge has arrived for you: The Third InterSystems Technical Article writing contest in Spanish is here!

🏆 3rd Technical Articles Contest in Spanish 🏆

Description of the contest: Write an article in Spanish in the Developer Community, on any topic related to InterSystems technology.

Duration: from May 6 to June 2, 2024.

Prizes for all participants: Everyone who publishes an article in Spanish (In the Spanish Community) during the contest period will receive a prize.

Main prize: LEGO Ferrari Daytona SP3 / Magic Gringotts™ Bank - Collector's Edition.

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