Log every interaction with the system

[mam10eks]

Every Interaction with the system (no matter which) needs to be logged in a centralized way. Since this is a cross cutting concern, a preferred way to solve this issue would be aspect oriented programming.

Please note that we could change the scope of the ticket in any way. The things that I have mentioned here is only what first comes to my mind and should serve as a discussion base for determining the real scope of what is to be done in the ticket!

Basically, the goal if this ticket is a single aspect, which:

• logs response times and request headers and accesed resources for every request
• attaches a session cookie to every user
• logs:
  • which queries executed a user
  • did a user some pagination for a query
  • which results are clicked by a user
  • which results are showed to the user
  • which recommendations are showed to the user
  • which recommendation are clicked by the user
• the preferred way to solve this is:
  • do everything on the server
  • dont expect the user is executing javascript
  • hence rely completely on default browser headers like referrer
• Maybe we could use some fancy tools (e.g. not only a single rdbms) like event sourcing (apache kafka, rabbit mq) or stuff like that (that would be really interesting :) )

[mam10eks]

I will do this until next monday (20.11.2017)