Class: Readis::Inspect

Inherits:
Readis
  • Object
show all
Defined in:
lib/readis/inspect.rb

Constant Summary collapse

WHITELIST = 
%w[
  keys
  exists get hexists hget hgetall hkeys hlen hmget hvals
  info lindex llen lrange mget randomkey scard sdiff
  sinter sismember smembers srandmember strlen sunion
  ttl type zcard zcount zrange zrangebyscore zrank
  zrevrange zrevrangebyscore zrevrank zscore
]

Instance Method Summary collapse

Methods inherited from Readis

command_runner, #help, #options

Constructor Details

#initialize(*args) ⇒ Inspect

Returns a new instance of Inspect.



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# File 'lib/readis/inspect.rb', line 13

def initialize(*args)
  super
  @redis = Redis.new(:host => self.options[:host], :port => self.options[:port])
end

Instance Method Details

#execute_command(input_string) ⇒ Object 



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# File 'lib/readis/inspect.rb', line 53

def execute_command(input_string)
  parts = input_string.split(" ")
  redis_command = parts.shift
  
  if redis_command
    redis_command.downcase!
  end
  
  case redis_command
  when nil
    # do nothing
  when *WHITELIST
    @redis.send(redis_command, *parts)
  when "exit", "quit"
    exit
  else
    raise ArgumentError, "Unknown or unsupported command"
  end
end

#parser ⇒ Object 



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# File 'lib/readis/inspect.rb', line 18

def parser
  optparser = super
  optparser.banner = <<-BANNER

Usage: readis inspect [options]

  BANNER
  optparser
end

#run ⇒ Object 



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# File 'lib/readis/inspect.rb', line 28

def run
  loop do
    print "readis #{self.options[:host]}:#{self.options[:port]}> "
    input_string = gets.chomp
    # TODO: tab completion.  Example implementation in automatthew/flipper
    # https://github.com/automatthew/flipper/blob/master/lib/flipper.rb
    # Inititally, we should only try to complete using the list of command
    # names, but we may later consider adding keys, fields, member names, etc.
    # discovered through commands issued.
    begin
      out = execute_command(input_string)
      case out
      when nil
        # do nothing
      else
        # TODO: consider the formatting.  Do we want to mimic
        # the redis-cli output?
        puts out.inspect
      end
    rescue => error
      puts "Error: #{error.message}"
    end
  end
end