I think it's too obvious to say that a singleton is an anti-pattern as there are tons of articles about that (singleton being an anti-pattern). However, more often than not, the question is how to define global things without a singleton; and the answer to that is not obvious for many of us. There are several examples: a database connection pool, a repository, a configuration map, etc. They all naturally seem to be "global"; but what do we do with them?

Continue...