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#Caché

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InterSystems Caché is a multi-model DBMS and application server. See more details here.

Documentation.

Hello everyone. I have some problem with selecting my own globals from namespace. My task is select only globals created by me. Follow my code, I get all globals from given namespace.

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WebSockets look to be supported reasonably well in Cache. I have yet to use them in production so I am wondering how well it has worked for other developers.

In particular what happens when the browser does not support WebSockets, or when a firewall blocks the connection.

Have you had to write your own long polling fall-back?

I've read the documentation and found this interesting article...

https://community.intersystems.com/post/asynchronous-websockets-quick-tutorial

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Question
· Apr 24, 2017
Connect PRTG to Cache

I am trying to set up a sensor in PRTG to connect to Cache, specifically the ens_util.log, so that I can have a live feed of my error count. I am having trouble getting the sensor to log in to Cache. Has anyone had any luck getting PRTG to connect on the database level? Thanks!

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We have multiple server and multiple namespace.

I have a script having sql query which fetch data from current namespace of a server.

If I want to run the same query on different server to fetch data, but I want to run that script on just one server for all server.

Please let me know how can I proceed.

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Question
· Jun 2, 2017
Decoding Base64 PDF File

Hello, I am writing some cache code that will pick up a PDF file, Base64 encode the contents and then send on to a third party system within a Long String (via their API). I have been testing this and discovered that the PDFs do not open within the supplier system (I get an error saying that it hasn't been decoded correctly). I wanted to prove that the issue does not lie with the way that I have Base64 encoded it within Ensemble, and therefore as a test wanted to Encode the PDF stream, then decode the stream and write out to a new file.

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Good day, I would like to find out the size of Caché ObjectScript variable in order to guarantee that my program will not leak, equally in terminal and Caché globals. For example how huge number I can store in that variable ? And what happen in Caché when variable will leak ? How is this behavior treated? (how much memory is reserved for common variable?)

Thanks in advance for your answers.

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Hi,

I have a situation where I write a character stream to a file. The file content gets signed and the signature is sent to a service provider together with the file content.

The signing is done using openssl.

This works perfectly on a dev PC, which is runnning Windows and has a little-endian architecture.

The problem is as soon as I do this on the server, which has a big-endian architecture, the signed value is incorrect according to the service provider.

The content is signed using RSA SHA256 with PSS padding.

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Question
· Jul 23, 2017
Check if class exists

There is method:

$System.OBJ.New( ClassName As %String = "" )

If class with name ClassName exists - everything is OK.

But, when class does not exist, there is error - <CLASS DOES NOT EXIST>

How can I check before calling $System.OBJ.New() if class witn name ClassName exists?

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Let's say I have this property:

Property FavoriteColors As List Of %String;

I heed to convert it to JSON using SQL or at least without object access (so direct global access).

What's the fastest way to do that?

I thought about JSON_ARRAY and JSON_ARRAYAGG sql functions but they don't do that.

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Hi, I work on my application and I want to develop rules for extracting values from my database but i've any idea:

I want to order my records by the most recent timestamps values with profile_id and biometric type as keys, after comparing them with my personal program date (when the timestamp > at my fixed date : an alert message is sent to the patient)

you find here the attached screenshots for my to databases. thank's

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I have an xml file that I read into objects and I am trying to print that file back in nested xml anyone with idea on how that can be achieved or where I can read in order to achieve this, here is an example of what I am trying to do.

From this

<Root>
  <FamilyMembers>
  <familyName>
  </familyName>
  <Name>
  </Name>
  <Age>
  </Age>
  <Employment>
  </Employment>
  </FamilyMembers>
</Root>

To this

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There is a finite list of date formats that users want to use to enter a date in a form. These formats include single digits for month and day and double digits for year. The field is represented by a dateText control.

How would one get to allow a dateText control to accept multiple date formats ? I see only 3 listed here, do those include using single digits for month and day ?

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