In our last lesson, we added a relationship between 2 persistent classes. We are clearly going to need to start creating REST Services to expose CRUD operations for each of these classes, but before we do that, we should really finish defining our linkages. We added code to our Widget toJSON to spool off related Accessory data, so we should really do the reciprocal and allow Accessories to return all Widgets that are compatible.
As many of you, our partners, are more widely using modern UI frameworks to create client front-end, you may have encountered a question, "So how do I secure my data when I just finished developing all new fancy browser based client experience?"
The answer is easy. Use a standard, proven OAuth2 and OpenID!
"OK, but how can I do it? I have never done it before."
No problem, just have a look here, if your client is Angular (not AngularJS) based, there is a demo project available for you to review and get inspired!
It was my answer to the question appeared in GoogleGroups. And when I answered there I figured out that it might worth to post an article and to add some light on how Unicode is stored in Caché.
I needed to pass through a file with Ensemble but the operation wasn't writing some filenames as given because the EnsLib.File.PassthroughOperation 'sanitizes' filenames removing characters that are not valid on some operating systems; 09000655_AEDC_C3344059_A/E_Martin Browne_09000655_201706221018.pdf 09000655_AEDC_C3344059_A#47E_Martin_Browne_09000655_201706221018.pdf
In our last lesson, we implemented a new REST Service to allow us to perform CRU operations on Widgets, and refactored our Controllers to allow the page setup to be decouple from the content.
A practical guide to using the tools PERFMON and MONLBL.
Introduction
When investigating performance problems, I often use the utilities ^PERFMON and ^%SYS.MONLBL to identify exactly where in the application pieces of code are taking a long time to execute.
On the back of my recent post on writing bug-less code I wanted to raise a few suggestions (to ISC) that would help prevent certain types of bugs at compile time. I've probably missed a few, but these are the main ones in my mind. Please contribute more suggestions.
Btw, these also serve as potential gotchas for new COS developers.
This is a translation of the following article. Thanks @Evgeny Shvarov for the help in translation.
Let's assume that you wrote a program that shows "Hello World!", for example:
write "Hello, World!"
The program works and everyone is happy.
With time, however, your program becomes more complex, gets more features and you eventually need to show the same string in different languages. Moreover you don't know the number and names of these languages.
The spoiler below contains a description of how the task of multi-language localization is solved in Caché.
Every row-and-column intersection contains exactly one value from the applicable domain (and nothing else).
The same value can be atomic or non-atomic depending on the purpose of this value. For example, “4286” can be
atomic, if its denotes “a credit card’s PIN code” (if it’s broken down or reshuffled, it is of no use any longer)
non-atomic, if it’s just a “sequence of numbers” (the value still makes sense if broken down into several parts or reshuffled)
This article explores the standard methods of increasing the performance of SQL queries involving the following types of fields: string, date, simple list (in the $LB format), "list of <...>" and "array of <...>".
In the previous article, I have demonstrated a simple way to record data changes. At this time I have changed the "Audit Abstract Class" which is responsible for recording audit data and the data structure where the audit log will be recorded.
I have changed the data structure to a parent and child structure where there will be two tables to record the "transaction" and the "fields its values" changed on that transaction.
A request came from a customer to estimate how long it would take to encrypt a database with cvencrypt utility.
This question is a little bit like how long is a piece of string — it depends. But its an interesting question. The answer primarily depends on the performance of CPU and storage on the target platform the customer is using, so the answer is more about coming up with a simple methodology that can be used to benchmark the CPU and storage while running cvencrypt.
This should be an overview over a subject that pops up over several places in online documentation mostly as remarks and never as dedicated chapter.
Once upon a time ... No it's not a fairy tale. In the beginning of Caché (and before) you had your partition to run your code. Part of that partition was a space with all your local variables nicely sorted by %,A,..Z,a,...z
In last week's discussion we created a simple graph based on the data input from one file. Now, as we all know, sometimes we have multiple different datafiles to parse and correlate. So this week we are going to load additional perfmon data and learn how to plot that into the same graph.
Since we might want to use our generated graphs in reports or on a webpage, we'll also look into ways to export the generated graphs.
A feature I recently used in working on ISC internal applications is the ability to send emails on behalf of someone. This is useful when generating system notifications from an application when you want some of them to show up as being from a specific person, perhaps posting comments on a work ticket.
In my case I was updating our facilities work order system for tracking requests. Normally all notification emails are sent from the same noreply email address. I wanted to change that so comments added from the original requester would show up as being from them and stand out.
Last week saw the launch of the InterSystems IRIS Data Platform in sunny California.
For the engaging eXPerience Labs (XP-Labs) training sessions, my first customer and favourite department (Learning Services), was working hard assisting and supporting us all behind the scene.
Twilio is a great tool for programmatically initiating and managing phone calls. In this example we'll go over basic account setup, create a Cache Class to manage our interaction with the Twilio API, and initiate a phone call from the Cache Terminal.
The full Class used in this example is available on GitHub as well.
a.k.a.. "The World of Widgets Returns!" or "Paternity leave damages Instructional Series momentum"
In our last lesson, we combined 2 separate classes to appear as the same property. We now have the ability to Update our Widget catalog, but what if we want to Create a Widget? Thankfully, we've already done 90% of what we need, just by implementing Edits
offers the latest features and bug fixes. It now updates your installation of Atelier to build 1.1.291 for Mac, Windows, Red Hat and SUSE. Here’s an account of what’s recently been improved:
Caché will not change the cryptographic settings in an existing TLS configuration when you upgrade. This means that unless you've updated them yourself, you're still using the values from the very first version you started using SSL in.
Hello again and welcome to the Part 3 - Using the SQL API!
If you have been wondering about how to use SQL along with Frontier, you came to the right place. That's because since Frontier wraps the common Caché SQL API within it's own, you need to use the API provided from it. But you don't need to worry about its learning curve, because the Frontier SQL API is really simple.
By views
XDATA is used for a whole host of ISC libraries to store things like Zen pages, BPL logic and DTL transformations.
