Resident control add-ins

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One of the most common questions I get asked about Control Add-ins is whether you can make a control add-in be always present and able to respond to your calls from AL. In other words: can you have a resident control add-in that you can invoke from anywhere in your AL code.

I’ve done a lot about control add-ins. However, I’ve never done resident control add-ins for real; all I know about them is pure theory and then some playing I did at various points of time. Still, this is an interesting topic that I wanted to address some way or other.

So, yesterday I did a live session about it.

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A couple of ideas for HttpClient

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When invoking any REST web services, a lot of AL code mostly looks like this:

procedure CallRESTFoo()
var
    Client: HttpClient;
    Response: HttpResponseMessage;
    Body: Text;
    Json: JsonObject;
begin
    Client.Get('https://foo.bar/', Response);
    Response.Content.ReadAs(Body);
    Json.ReadFrom(Body);
    // Process JSON body of the response...
end;

Of course, there are more things there, like headers or perhaps calling HTTP POST (or another method) instead of GET, but when you strip it down to the bones, the chunk above is what remains.

Today’s post is a follow up for my HttpClient Patterns live session on http://vjeko.live/ and as I promised, I am providing the text-only version for those who prefer reading to watching.

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Schedule for the period ahead

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Happy New Year everyone, with a little delay. I was busy in the first two weeks of this year preparing and delivering the “Leveraging Git” webinar. It turned out to be quite a success, but it also prevented me from doing my live session last Friday.

But this short break doesn’t mean I am not going to get busy with my blog and live blog again. This is what’s coming up.

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Fun with Interfaces: Testing

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Oh how much fun we had today on my live stream, it’s just amazing. First, all the viewers had fun of waiting for me to go live for nearly an hour, and then at some point I managed to unplug my reflector. Perks of live streaming 😁

First of all, I would like to – once again – apologize to everyone who waited for me to go live. I’ll explain in the end of this blog what really happened. For now, let’s go on-topic.

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