Add hexagonal architecture presentation

[iluwatar]

As part of issue #197 I made a presentation about Hexagonal Architecture pattern with remark.js. If this is ok, I thought we could use similar method for all the pattern presentations.

[iluwatar]

@npathai @markusmo3 please review.

[markusmo3]

Heya there,
had a quick look through and noticed some things.

• Is the presentation intended to be a readme broken up into smaller pieces? Or more like a blogpost? (I'm already thinking about how we could generate those presentation automatically >.<)
• Maybe it would be nice to also show the class diagram? Im not sure what the usage for such a presentation is, to just show the existence of such pattern or to explain it in detail?
• The slides are kinda neutral, a little "clinical" (thats a german saying, im not sure it conveys the meaning) Does remark.js have themes?

I think of presentations as a more personal thing. Having one is nice to start from, but i wouldn't want to just present a direct copy to a crowd.

All in all, nice work. I didnt even know such a nice thing as remark.js existed before 👍

[iluwatar]

Thank you for the comments.

Is the presentation intended to be a readme broken up into smaller pieces? Or more like a blogpost? (I'm already thinking about how we could generate those presentation automatically >.<)

I thought about it while doing this, but I think the presentations need a bit different angle and can't be autogenerated from the content we already have. So yes, it has some bits from the README.md and then some new content.

Maybe it would be nice to also show the class diagram? Im not sure what the usage for such a presentation is, to just show the existence of such pattern or to explain it in detail?

Good point. I agree that for some patterns showing the class diagram makes sense but for this large architectural pattern I chose to leave it out.

The slides are kinda neutral, a little "clinical" (thats a german saying, im not sure it conveys the meaning) Does remark.js have themes?

Yes, I used the default styles and agree that it looks clinical. I'll look into this.

[Tschis]

@iluwatar are you looking into this for other patterns? Since you did some manual work, as @markusmo3 suggested, it might get outdated if we don't have means of automatically updating it.

[iluwatar]

At the moment I'm not working on this but we are accepting pull request for presentations. We have selected remarkjs as the technology but otherwise it is manual work. I believe it can't be automated for good results. See https://github.com/iluwatar/java-design-patterns/wiki/01.-How-to-contribute for instuctions.