Tales from the dark side: Eight lessons from the Java world

A short talk given privately to engineers at work. Perhaps later I'll expand it.

Transcript

2. Tales from the dark side Eight lessons from the Java world
3. • • • • • • • • Think big.
4. • • • • • • • • The client is inherently untrusted.
5. • • • • • • • • The client is inherently untrusted. account = Account(params[:account])
6. • • • • • • • • Standardize libraries.
7. • • • • • • • • Use concrete interfaces.
8. • • • • • • • • Isolate dependencies.
9. • • • • • • • • Isolate dependencies. bundle install --path vendor/bundle
10. • • • • • • • • Hierarchy is your friend.
11. • • • • • • • • Don’t be afraid of threads.
12. • • • • • • • • Use real singletons.
13. • • • • • • • • Use real singletons. Logger.debug(“OHAI”)
14. • • • • • • • • Use real singletons. class MyLogger include Singleton def debug(*args) # stuff end end class BokBok def initialize(logger) @logger = logger end def eat_corn @logger.debug("NOM") # do stuff end end logger = MyLogger.instance bokbok = BokBok.new(logger)
15. fin
16. Thanks!
20. • • • • • • • • Profile your code
21. • • • • • • • • Concurrency Threads, dammit!
22. • • • • • • • • You can get a long way with single inheritance
23. • • • • • • • • Stop putting code in your HTML