Module: Redis::Keys

Defined in:
lib/redis/keys.rb

Instance Method Summary collapse

Instance Method Details

#redis_DEL(*keys) ⇒ Object 



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# File 'lib/redis/keys.rb', line 91

def redis_DEL *keys
  count = 0
  keys.each do |key|
    count += 1  if @database.has_key? key
    @database.delete key
  end
  count
end

#redis_EXISTS(key) ⇒ Object 



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# File 'lib/redis/keys.rb', line 111

def redis_EXISTS key
  @database.has_key? key
end

#redis_EXPIRE(key, seconds) ⇒ Object 



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# File 'lib/redis/keys.rb', line 115

def redis_EXPIRE key, seconds
  @database.expire key, redis_pos_i(seconds)
end

#redis_EXPIREAT(key, timestamp) ⇒ Object 



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# File 'lib/redis/keys.rb', line 119

def redis_EXPIREAT key, timestamp
  @database.expire_at key, redis_pos_i(timestamp)
end

#redis_KEYS(pattern) ⇒ Object 



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# File 'lib/redis/keys.rb', line 9

def redis_KEYS pattern
  @database.reduce([]) do |memo, key_val|
    key = key_val[0]
    memo.push key if File.fnmatch(pattern, key)
    memo
  end
end

#redis_MOVE(key, db) ⇒ Object 



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# File 'lib/redis/keys.rb', line 144

def redis_MOVE key, db
  raise unless @database.has_key? key
  raise if @databases[redis_i db].has_key? key
  @databases[redis_i db][key] = @database[key]
  @database.delete key
  true
rescue
  false
end

#redis_PERSIST(key) ⇒ Object 



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# File 'lib/redis/keys.rb', line 123

def redis_PERSIST key
  @database.persist key
end

#redis_RANDOMKEY ⇒ Object 



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# File 'lib/redis/keys.rb', line 4

def redis_RANDOMKEY
  return nil if @database.empty?
  @database.random_key
end

#redis_RENAME(key, newkey) ⇒ Object 



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# File 'lib/redis/keys.rb', line 131

def redis_RENAME key, newkey
  raise 'key and newkey are identical' if key == newkey
  raise 'key not found' unless @database.has_key? key
  @database[newkey] = @database[key]
  @database.delete key
end

#redis_RENAMENX(key, newkey) ⇒ Object 



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# File 'lib/redis/keys.rb', line 138

def redis_RENAMENX key, newkey
  return false if @database.has_key? newkey
  redis_RENAME key, newkey
  true
end

#redis_SORT(key, *args) ⇒ Object 



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# File 'lib/redis/keys.rb', line 17

def redis_SORT key, *args
  record = @database[key] || []
  sort = 'ASC'
  gets = []
  alpha = false
  by = by_hash = offset = count = store = nil
  until args.empty?
    arg = args.shift
    case arg.upcase
    when 'LIMIT'
      offset = args.shift.to_i
      count = args.shift.to_i
    when 'ASC'
      sort = 'ASC'
    when 'DESC'
      sort = 'DESC'
    when 'ALPHA'
      alpha = true
    when 'STORE'
      store = args.shift
    when 'GET'
      gets << args.shift
    when 'BY'
      by, by_hash = args.shift.split '->', 2
    else
      raise "#{arg} bad argument"
    end
  end
  result = record.sort do |a, b|
    if by
      a = @database[by.sub /\*/, a]
      a = a[by_hash] if by_hash
      b = @database[by.sub /\*/, b]
      b = b[by_hash] if by_hash
    end
    if alpha
      a = a.to_s
      b = b.to_s
    else
      a = a.to_f
      b = b.to_f
    end
    if sort == 'DESC'
      b <=> a
    else
      a <=> b
    end
  end
  unless gets.empty?
    original = result
    result = []
    original.each do |r|
      gets.each do |g|
        get, get_hash = g.split('->', 2)
        r = @database[get.sub /\*/, r] unless get == '#'
        r = r[get_hash] if get_hash
        result << r
      end
    end
  end
  if count and offset
    result = result[offset,count]
  elsif count
    result = result[0,count]
  elsif offset
    result = result[offset..-1]
  end
  if Array === result[0]
    result = result.collect {|r| r.first}
  end
  @database[store] = result if store
  result
end

#redis_TTL(key) ⇒ Object 



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# File 'lib/redis/keys.rb', line 127

def redis_TTL key
  @database.ttl key
end

#redis_TYPE(key) ⇒ Object 



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# File 'lib/redis/keys.rb', line 100

def redis_TYPE key
  case @database[key]
  when String, Numeric; 'string'
  when Array; 'list'
  when Set; 'set'
  when ZSet; 'zset'
  when Hash; 'hash'
  else 'unknown'
  end
end