Module: Rodbot::Db::Redis

Includes:
Memoize
Defined in:
lib/rodbot/db/redis.rb

Overview

Database adapter for Redis

All keys are implicitly nested inside the “rodbot:…” namespace to allow using one and the same Redis db for more than just Rodbot.

Examples:

Enable in config/rodbot.rb

db 'redis://localhost:6379/10'

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Memoize

included

Class Method Details

.extended ⇒ Object 



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# File 'lib/rodbot/db/redis.rb', line 16

def self.extended(*)
  require 'redis'
end

Instance Method Details

#delete(*key) ⇒ Object 



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# File 'lib/rodbot/db/redis.rb', line 30

def delete(*key)
  get(*key).tap do
    db.del(skey(*key))
  end
end

#flush ⇒ Object 



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# File 'lib/rodbot/db/redis.rb', line 45

def flush
  db.flushdb
  self
end

#get(*key) ⇒ Object 



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# File 'lib/rodbot/db/redis.rb', line 26

def get(*key)
  deserialize(db.get(skey(*key)))
end

#scan(*key) ⇒ Object 



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# File 'lib/rodbot/db/redis.rb', line 36

def scan(*key)
  cursor, result = 0, []
  loop do
    cursor, keys = db.scan(cursor, match: skey(*key))
    result.append(*keys)
    break result if cursor == '0'
  end.map { _1[7..] }
end

#set(*key, expires_in: nil, &block) ⇒ Object 



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# File 'lib/rodbot/db/redis.rb', line 20

def set(*key, expires_in: nil, &block)
  block.call((get(*key) unless block.arity.zero?)).tap do |value|
    db.set(skey(*key), serialize(value), ex: expires_in)
  end
end