Hey InterSystems Community!

This is probably far-fetched - is there a way to get notified/get a piece of code triggered whenever the state of a global changes?

Now what could I possibly want with that? Quite simple! I would like to forward the content of a global (in this case the "FSLog" global written by the FHIR implementation) while adding timestamps to it - to create some sort of file-based logging for it.

 

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Hi,

I wonder why IRIS seems to have its on way to deal with order or operations such as the example in the title. This affects regular arithmetic operations but of course conditions in various statements.

Even after years of COS development, I still get caught by these tiny frustrating details and it is absolutely annoying when you are writing APIs that some some maths.

 

Here is an example:

 

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Question
Joe Brun · Nov 26, 2020
10000 clients simultaneously

How InterSystems solutions handle C10k connections? ( https://en.wikipedia.org/wiki/C10k_problem )
For example, I want to create a social network on InterSystems platform.
In the scenario client (browser) => CSP Gateway => Cache can the Cache handle a large number of clients at the same time?
Quick analysis shows that CSP Gateway for each request opens a new TCP connection to Cache SuperServer (port 1972) allocating CSP session and license slot.

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Hi.

Is it possible to convert the object of type %SerialObject to $List form? I'm using embedded class in unique index and I want to use autogenerated method Open to  access the object - parameter should be in $List form...

 

Tnx.

Regards,

Matjaž

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Question
Mikhail Khomenko · Nov 1, 2021
Globals export exclusion

Hello everyone,
I'd like to export Ensemble globals, but without Ensemble messages, this way:

^^database>s list("Ens*.gbl,'Ens.Message*.gbl")=""
^^database>write $SYSTEM.OBJ.Export(.list, "/tmp/globals.xml")

Documentation says that it could be done by adding an apostrophe, but it doesn't work for me - all Ens* globals are still exported.
What I'm doing wrong? Thanks!

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Question
Yuri Marx · Jun 29, 2020
Get Property MaxLen

Set cdef = ##class(%Dictionary.ClassDefinition).%OpenId(table)
Set count = cdef.Properties.Count()
For i = 1:1:count {
      Write cdef.Properties.GetAt(i).Name, " ", cdef.Properties.GetAt(i).Type, "",  <MY QUESTION>,!
}
 

How can I do to get maxlen?

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Hi community,

I need to write an SQL query  to fetch a random record from a table, that table has millions of data.

In postgresql, for example, there is a RANDOM() function to do something like that:

SELECT column FROM table
ORDER BY RANDOM()
LIMIT 1

Is it possible to do something like that in Caché?

Thanks in advance

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Hi,

NodeJs(v0.10.0) to Intersystems Cache2014( using cache0100.node)  network connection Not working .

This is error msg i'm getting

"{ ErrorMessage: 'Error loading Cache Library: _SYSTEMcache.dll; Error Code : 126 (The specified module could not be found.)',
  ErrorCode: 1009,
  ok: 0 } "

My Code ->

user.open({ip_address:"127.0.0.1",tcp_port:57772,username: "_SYSTEM",password: "SYS",namespace: "USER"},function(err,res){

    console.log("Error : ",err);console.log("Result : ",res);

    if(!err){

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Question
Azezur Rahman · Oct 16, 2020
IRIS Download issue.

Hello there community, 

As I am interested in taking part in the  Full Stack Development for IRIS, I tried to download the Software and get hands on experience with it. 

The registration went well, but unfortunately I only got a mail with regard to the download but the Software did not get downloaded. 

I need the help of you experts please. 

Am I doing something wrong or did I just miss some thing or some steps in between these that needs to be fulfilled? 

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IRIS use MIRROR to ensure the continuous operation of the hospital business, but MIRROR synchronization data does not contain (web application configuration information, task plans, sql gateway, etc.), about the synchronization of such information do we have a better solution to solve this problem?

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Question
Delab guz · Feb 11
Driver odbc performance

Hello,

I'm using the InterSystems Iris odbc driver (DriverODBCVer=02.10) to get data from Iris table but it is slow.

Is there any options to improve performance ? Increase the packet size ?

Change to do in odbcinst.ini / odbc.ini to make it quicker ?

 

Thanks

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Hi all

I've been looking into how to convert some images with IRIS and saw some recommendations on the forums around using image magick.

However I can't seem to get this working using ZF100 and on windows server and I'm wondering if I'm missing something really obvious as I've not used IRIS to call third party applications before.

If I run via a Windows CLI on the server, it works fine, e.g:

magick "D:\1221701739_20190716134351965_1_0.jpg" -resize 640x480 "D:\1221701739_20190716134351965_1_TEST.jpg

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I would like to know if there is a way of having a callback or something similar, on persistent classes that is always called after the execution of the operation (failed or successfull).

%OnOpen is executed prior to the action, and there is no post callback

%OnAfterDelete and %OnAfterSave are executed after a successfull operation

 

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I'm trying to write a method that runs an OS command with $zf(-100,"/ASYNC") and then waits for it to finish before returning, but I can't figure out how to check if the child process (in $zchild) is still running. $System.Process.State($zchild) always returns "RUN" even once the child process is gone. Is there some better way to check this, short of running another OS-specific command and processing the output (which is just really annoying and unelegant)?

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We have a requirement to write to an AWS S3 bucket from Cache.

We haven't upgrade to IRIS yet, but are looking at doing so in the future. This requirement cannot wait for the upgrade to happen, unfortunately.

 

Will appreciate if any one can share any example code, that enables cache to write to an AWS S3 bucket? 

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Question
Blaise ZARKA · Dec 19, 2019
%New error handling

Hi,

On a persistent class, I have defined an %OnNew method that validate some properties with appropriate status code for each kind of error.
Question is: how do you catch the specific error when %New is called on this class?

Surrounding %New method with a try-catch not seems to work.

Thanks

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In my Business Operation I need to execute a bookkeeping method every X seconds.

How can I do that?

There are two workarounds (I dislike both):

  1. Execute bookkeeping on process start - but there might be no requests at all
  2. Create a BS that sends messages to BO every X seconds - it makes production more complex and also queues might not guarantee that the method is executed on schedule.

Thoughts?

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