UniPg

Compatibility layer for pg and pg2.

Features

Switching between pg and pg2

UniPg automatically delegates to pg for OTP >= 23 and fallback to pg2 for OTP < 23.

Implicit scope, group creation.

• :pg.start_link(scope) is automatically called for scope access.
• :pg2.create(group) is automatically called for group access.

Calling scope/group creation everytime introduces performance penalty. But it's so small(< 10ns) that most applications can ignore it for programmers's convenience.

scope for pg2

Emulates pg's scope API for pg2.

Usage

iex(1)> UniPg.join(:scope1, :group1, [self()])
:ok
iex(2)> UniPg.get_members(:scope1, :group1)
[#PID<0.179.0>]
iex(3)> UniPg.which_groups(:scope1)        
[:group1]
iex(4)> UniPg.leave(:scope1, :group1, [self()])
:ok
iex(5)> UniPg.get_members(:scope1, :group1)    
[]

Installation

If available in Hex, the package can be installed by adding uni_pg to your list of dependencies in mix.exs:

def deps do
  [
    {:uni_pg, "~> 0.1.0"}
  ]
end