Compiler

Class Queries in InterSystems Caché is a useful tool that separates SQL queries from Caché Object Script code. Basically, it works like this: suppose that you want to use the same SQL query with different arguments in several different places.In this case you can avoid code duplication by declaring the query body as a class query and then calling this query by name. This approach is also convenient for custom queries, in which the task of obtaining the next row is defined by a developer. Sounds interesting? Then read on!

In this article I would like to tell you about macros in InterSystems Caché. A macro is a symbolic name that is replaced with a set of instructions during compilation. A macro can “unfold” in various instruction sets each time it is called, depending on the parameters passed to it and activated scenarios. This can be both static code and the result of ObjectScript execution. Let's take a look at how you can use them in your application.

Greetings! This article describes yet another simple way of creating installers for the solutions based on InterSystems Caché. The topic covers applications, which can be installed or completely removed from Caché with one action only. If you are still documenting installation instructions that have more than one step to do to install your application — it’s high time you automated this process. 

In most cases, if one class depends on another, the class compiler will detect this and determine the correct compilation order. For example:

The attached file contains an example of code generation using ObjectGenerators which builds a very simple homemade RuleEngine. 

Code generation is an excellent way of increasing performance moving run-time calculations to compile-time.

We could generate code creating routines or implemeting methods using ObjectGenerators. In this example we are using ObjectGenerators.

Update: Rule Engine is now on GitHub https://github.com/intersystems-ib/cache-iat-ruleengine

Hi all!

I'm developing a mini-framework to implement annotations in Cache. I want to support two kind of annotations: metadata and method decorators. I've got stuck trying to implement the second one.

Metadata

With metadata annotations I can add metadata to any kind of target. A target can be a method/classmethod, parameter, property and class.

For example:

Hi -

I'm trying to create a method that will automatically create something I can save and use later, which will let me automate data migration from one version of a class to the next.

I have just imported our Ensemble project (not a really big one, like two man-years) into my MacBook Air  Ensemble 2016.3 instance to test many things (document model, etc.), Atelier among the others.

The "Production view" is not here, and I miss it.

The opening of Diagram Editor for BP is pretty hidden. I would even like having a switch, which would default to the Diagram Editor. 

Anytime I click on the Open Diagram Editor, it waits for a while, ten produces an error and only then I can see the diagram.

When I try to compile through Atelier (Compile Project), I noticed that in compilation with error it returns this message 'Failed to read /api/atelier/v1/ ...':

No additional Atelier files to synchronize.
Compile failed: Failed to read /api/atelier/v1/ERP/action/compile?flags=ck
Compile failed: Failed to read /api/atelier/v1/ERP/action/compile?flags=ck
Compile failed: Failed to read /api/atelier/v1/ERP/action/compile?flags=ck
Compile failed: Failed to read /api/atelier/v1/ERP/action/compile?flags=ck

The class %Compiler.UDL.TextServices arrived in 2015.1, bringing us methods for exporting a class in UDL format (i.e. looking just like we're used to seeing it in Studio), and importing a UDL format definition back into a namespace. Some source control tools including our Deltanji are now able to use UDL format, resulting in diffs that are easier to understand.

"Help me, Obi Wan Kenobi"?

I’ve hit the wall. I’m a one person shop who wants to start developing Cache on a mac using Eclipse/Atelier, after using Studio for the last 5 years. I’ve installed the 1.1 beta plugin, watched 6 or 7 videos from the September conference, tried several times to work through the cheat sheets, only to have connection issues or compilation issues, so at this point, I’m feeling very frustrated. The videos were interesting, but generally didn’t work as tutorials for fundamental programming operations, for me.

Hi All,I got an error when i compile one class. the error was objects of class are (classname) instantiated in 1 processes.how can i recover the problem. my cache instance is Cache 5.0

Is there a way to enumerate the compilation status of a package?    

currently after deployment we are doing something like this to validate a successful load and compile of classes:

successful_compilation_count=`grep -a "Compilation finished successfully" output.log | wc -l`
successful_load_count=`grep -a "Load finished successfully" output.log | wc -l`

is there a method to do this where it is a little bit more elegant/dynamic without having to maintain counts for comparison ?

Hi, Community!

Please share your experience on code deployment on production site. Do you compile ObjectScript on Production? Is it OK? 

Or you only compile on Test site and copy cache.dat to a Production?