Class: Redis
- Inherits:
-
Object
- Object
- Redis
- Defined in:
- lib/redis.rb,
lib/pipeline.rb
Direct Known Subclasses
Defined Under Namespace
Classes: Pipeline
Constant Summary collapse
- ERR =
"-".freeze
- OK =
'OK'.freeze
- SINGLE =
'+'.freeze
- BULK =
'$'.freeze
- MULTI =
'*'.freeze
- INT =
':'.freeze
Instance Attribute Summary collapse
-
#server ⇒ Object
readonly
Returns the value of attribute server.
Instance Method Summary collapse
- #[](key) ⇒ Object
- #[]=(key, val) ⇒ Object
- #bgsave ⇒ Object
- #bulk_reply ⇒ Object
- #decr(key, decrement = nil) ⇒ Object
- #delete(key) ⇒ Object
- #expire(key, expiry = nil) ⇒ Object
- #fetch(len) ⇒ Object
- #flush_all ⇒ Object
- #flush_db ⇒ Object
- #get(key) ⇒ Object
- #get_reply ⇒ Object
- #get_response ⇒ Object
- #host ⇒ Object
- #incr(key, increment = nil) ⇒ Object
- #info ⇒ Object
-
#initialize(opts = {}) ⇒ Redis
constructor
A new instance of Redis.
- #integer_reply ⇒ Object
- #key?(key) ⇒ Boolean
- #keys(glob) ⇒ Object
- #last_save ⇒ Object
- #list_index(key, index) ⇒ Object
- #list_length(key) ⇒ Object
- #list_range(key, start, ending) ⇒ Object
- #list_rm(key, count, value) ⇒ Object
- #list_set(key, index, val) ⇒ Object
- #list_trim(key, start, ending) ⇒ Object
- #mget(*keys) ⇒ Object
- #monitor ⇒ Object
- #multi_bulk ⇒ Object
- #pipelined {|pipeline| ... } ⇒ Object
- #pop_head(key) ⇒ Object
- #pop_tail(key) ⇒ Object
- #port ⇒ Object
- #push_head(key, string) ⇒ Object
- #push_tail(key, string) ⇒ Object
- #quit ⇒ Object
- #randkey ⇒ Object
- #read(length = read_proto) ⇒ Object
- #read_proto ⇒ Object
- #read_socket ⇒ Object
- #rename(oldkey, newkey) ⇒ Object
- #rename!(oldkey, newkey) ⇒ Object
- #select_db(index) ⇒ Object
- #set(key, val, expiry = nil) ⇒ Object
- #set_add(key, member) ⇒ Object
- #set_count(key) ⇒ Object
- #set_delete(key, member) ⇒ Object
- #set_diff(*keys) ⇒ Object
- #set_diff_store(destkey, *keys) ⇒ Object
- #set_inter_store(destkey, *keys) ⇒ Object
- #set_intersect(*keys) ⇒ Object
- #set_member?(key, member) ⇒ Boolean
- #set_members(key) ⇒ Object
- #set_union(*keys) ⇒ Object
- #set_union_store(destkey, *keys) ⇒ Object
- #set_unless_exists(key, val) ⇒ Object
- #single_line ⇒ Object
- #sort(key, opts = {}) ⇒ Object
- #status_code_reply ⇒ Object
- #to_s ⇒ Object
- #type?(key) ⇒ Boolean
- #with_socket_management(server, &block) ⇒ Object
- #write(data) ⇒ Object
Constructor Details
#initialize(opts = {}) ⇒ Redis
Returns a new instance of Redis.
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# File 'lib/redis.rb', line 22 def initialize(opts={}) @opts = {:host => 'localhost', :port => '6379', :db => 0}.merge(opts) $debug = @opts[:debug] @db = @opts[:db] @server = Server.new(@opts[:host], @opts[:port], (@opts[:timeout]||10)) end |
Instance Attribute Details
#server ⇒ Object (readonly)
Returns the value of attribute server.
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# File 'lib/redis.rb', line 19 def server @server end |
Instance Method Details
#[](key) ⇒ Object
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# File 'lib/redis.rb', line 193 def [](key) get(key) end |
#[]=(key, val) ⇒ Object
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# File 'lib/redis.rb', line 415 def []=(key, val) set(key,val) end |
#bgsave ⇒ Object
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# File 'lib/redis.rb', line 106 def bgsave write "BGSAVE\r\n" get_response == OK end |
#bulk_reply ⇒ Object
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# File 'lib/redis.rb', line 124 def bulk_reply begin x = read puts "bulk_reply read value is #{x.inspect}" if $debug return x rescue => e puts "error in bulk_reply #{e}" if $debug nil end end |
#decr(key, decrement = nil) ⇒ Object
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# File 'lib/redis.rb', line 216 def decr(key, decrement=nil) if decrement write "DECRBY #{key} #{decrement}\r\n" else write "DECR #{key}\r\n" end get_response end |
#delete(key) ⇒ Object
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# File 'lib/redis.rb', line 188 def delete(key) write "DEL #{key}\r\n" get_response == 1 end |
#expire(key, expiry = nil) ⇒ Object
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# File 'lib/redis.rb', line 427 def expire(key, expiry=nil) write("EXPIRE #{key} #{expiry}\r\n") get_response == 1 end |
#fetch(len) ⇒ Object
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# File 'lib/redis.rb', line 142 def fetch(len) with_socket_management(@server) do |socket| len = [0, len.to_i].max res = socket.read(len + 2) res = res.chomp if res res end end |
#flush_all ⇒ Object
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# File 'lib/redis.rb', line 91 def flush_all ensure_retry do puts "Warning!\nFlushing *ALL* databases!\n5 Seconds to Hit ^C!" trap('INT') {quit; return false} sleep 5 write "FLUSHALL\r\n" get_response == OK end end |
#flush_db ⇒ Object
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# File 'lib/redis.rb', line 86 def flush_db write "FLUSHDB\r\n" get_response == OK end |
#get(key) ⇒ Object
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# File 'lib/redis.rb', line 197 def get(key) write "GET #{key}\r\n" get_response end |
#get_reply ⇒ Object
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# File 'lib/redis.rb', line 405 def get_reply begin r = read(1) raise RedisError if (r == "\r" || r == "\n") rescue RedisError retry end r end |
#get_response ⇒ Object
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# File 'lib/redis.rb', line 450 def get_response begin rtype = get_reply rescue => e raise RedisError, e.inspect end puts "reply_type is #{rtype.inspect}" if $debug case rtype when SINGLE single_line when BULK bulk_reply when MULTI multi_bulk when INT integer_reply when ERR raise RedisError, single_line else raise RedisError, "Unknown response.." end end |
#host ⇒ Object
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# File 'lib/redis.rb', line 43 def host @opts[:host] end |
#incr(key, increment = nil) ⇒ Object
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# File 'lib/redis.rb', line 207 def incr(key, increment=nil) if increment write "INCRBY #{key} #{increment}\r\n" else write "INCR #{key}\r\n" end get_response end |
#info ⇒ Object
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# File 'lib/redis.rb', line 111 def info info = {} write("INFO\r\n") x = get_response x.each do |kv| k,v = kv.split(':', 2) k,v = k.chomp, v = v.chomp info[k.to_sym] = v end info end |
#integer_reply ⇒ Object
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# File 'lib/redis.rb', line 473 def integer_reply Integer(read_proto) end |
#key?(key) ⇒ Boolean
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# File 'lib/redis.rb', line 183 def key?(key) write "EXISTS #{key}\r\n" get_response == 1 end |
#keys(glob) ⇒ Object
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# File 'lib/redis.rb', line 159 def keys(glob) write "KEYS #{glob}\r\n" get_response.split(' ') end |
#last_save ⇒ Object
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# File 'lib/redis.rb', line 101 def last_save write "LASTSAVE\r\n" get_response.to_i end |
#list_index(key, index) ⇒ Object
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# File 'lib/redis.rb', line 280 def list_index(key, index) write "LINDEX #{key} #{index}\r\n" get_response end |
#list_length(key) ⇒ Object
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# File 'lib/redis.rb', line 230 def list_length(key) write "LLEN #{key}\r\n" case i = get_response when -2 raise RedisError, "key: #{key} does not hold a list value" else i end end |
#list_range(key, start, ending) ⇒ Object
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# File 'lib/redis.rb', line 270 def list_range(key, start, ending) write "LRANGE #{key} #{start} #{ending}\r\n" get_response end |
#list_rm(key, count, value) ⇒ Object
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# File 'lib/redis.rb', line 285 def list_rm(key, count, value) write "LREM #{key} #{count} #{value.to_s.size}\r\n#{value}\r\n" case num = get_response when -1 raise RedisError, "key: #{key} does not exist" when -2 raise RedisError, "key: #{key} does not hold a list value" else num end end |
#list_set(key, index, val) ⇒ Object
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# File 'lib/redis.rb', line 265 def list_set(key, index, val) write "LSET #{key} #{index} #{val.to_s.size}\r\n#{val}\r\n" get_response == OK end |
#list_trim(key, start, ending) ⇒ Object
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# File 'lib/redis.rb', line 275 def list_trim(key, start, ending) write "LTRIM #{key} #{start} #{ending}\r\n" get_response end |
#mget(*keys) ⇒ Object
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# File 'lib/redis.rb', line 202 def mget(*keys) write "MGET #{keys.join(' ')}\r\n" get_response end |
#monitor ⇒ Object
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# File 'lib/redis.rb', line 63 def monitor with_socket_management(@server) do |socket| trap("INT") { puts "\nGot ^C! Dying!"; exit } write "MONITOR\r\n" puts "Now Monitoring..." socket.read(12) loop do x = socket.gets puts x unless x.nil? end end end |
#multi_bulk ⇒ Object
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# File 'lib/redis.rb', line 392 def multi_bulk res = read_proto puts "mb res is #{res.inspect}" if $debug list = [] Integer(res).times do vf = get_response puts "curren vf is #{vf.inspect}" if $debug list << vf puts "current list is #{list.inspect}" if $debug end list end |
#pipelined {|pipeline| ... } ⇒ Object
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# File 'lib/redis.rb', line 29 def pipelined pipeline = Pipeline.new(self) yield pipeline pipeline.finish end |
#pop_head(key) ⇒ Object
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# File 'lib/redis.rb', line 255 def pop_head(key) write "LPOP #{key}\r\n" get_response end |
#pop_tail(key) ⇒ Object
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# File 'lib/redis.rb', line 260 def pop_tail(key) write "RPOP #{key}\r\n" get_response end |
#port ⇒ Object
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# File 'lib/redis.rb', line 39 def port @opts[:port] end |
#push_head(key, string) ⇒ Object
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# File 'lib/redis.rb', line 250 def push_head(key, string) write "LPUSH #{key} #{string.to_s.size}\r\n#{string.to_s}\r\n" get_response end |
#push_tail(key, string) ⇒ Object
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# File 'lib/redis.rb', line 245 def push_tail(key, string) write "RPUSH #{key} #{string.to_s.size}\r\n#{string.to_s}\r\n" get_response end |
#quit ⇒ Object
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# File 'lib/redis.rb', line 76 def quit write "QUIT\r\n" end |
#randkey ⇒ Object
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# File 'lib/redis.rb', line 225 def randkey write "RANDOMKEY\r\n" get_response end |
#read(length = read_proto) ⇒ Object
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# File 'lib/redis.rb', line 151 def read(length = read_proto) with_socket_management(@server) do |socket| res = socket.read(length) puts "read is #{res.inspect}" if $debug res end end |
#read_proto ⇒ Object
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# File 'lib/redis.rb', line 494 def read_proto with_socket_management(@server) do |socket| if res = socket.gets x = res.chomp puts "read_proto is #{x.inspect}\n\n" if $debug x.to_i end end end |
#read_socket ⇒ Object
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# File 'lib/redis.rb', line 486 def read_socket with_socket_management(@server) do |socket| while res = socket.read(8096) break if res.size != 8096 end end end |
#rename(oldkey, newkey) ⇒ Object
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# File 'lib/redis.rb', line 169 def rename(oldkey, newkey) write "RENAMENX #{oldkey} #{newkey}\r\n" case get_response when -1 raise RedisRenameError, "source key: #{oldkey} does not exist" when 0 raise RedisRenameError, "target key: #{oldkey} already exists" when -3 raise RedisRenameError, "source and destination keys are the same" when 1 true end end |
#rename!(oldkey, newkey) ⇒ Object
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# File 'lib/redis.rb', line 164 def rename!(oldkey, newkey) write "RENAME #{oldkey} #{newkey}\r\n" get_response end |
#select_db(index) ⇒ Object
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# File 'lib/redis.rb', line 80 def select_db(index) @db = index write "SELECT #{index}\r\n" get_response end |
#set(key, val, expiry = nil) ⇒ Object
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# File 'lib/redis.rb', line 420 def set(key, val, expiry=nil) write("SET #{key} #{val.to_s.size}\r\n#{val}\r\n") s = get_response == OK return expire(key, expiry) if s && expiry s end |
#set_add(key, member) ⇒ Object
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# File 'lib/redis.rb', line 297 def set_add(key, member) write "SADD #{key} #{member.to_s.size}\r\n#{member}\r\n" case get_response when 1 true when 0 false when -2 raise RedisError, "key: #{key} contains a non set value" end end |
#set_count(key) ⇒ Object
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# File 'lib/redis.rb', line 321 def set_count(key) write "SCARD #{key}\r\n" case i = get_response when -2 raise RedisError, "key: #{key} contains a non set value" else i end end |
#set_delete(key, member) ⇒ Object
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# File 'lib/redis.rb', line 309 def set_delete(key, member) write "SREM #{key} #{member.to_s.size}\r\n#{member}\r\n" case get_response when 1 true when 0 false when -2 raise RedisError, "key: #{key} contains a non set value" end end |
#set_diff(*keys) ⇒ Object
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# File 'lib/redis.rb', line 368 def set_diff(*keys) write "SDIFF #{keys.join(' ')}\r\n" Set.new(get_response) end |
#set_diff_store(destkey, *keys) ⇒ Object
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# File 'lib/redis.rb', line 373 def set_diff_store(destkey, *keys) write "SDIFFSTORE #{destkey} #{keys.join(' ')}\r\n" get_response end |
#set_inter_store(destkey, *keys) ⇒ Object
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# File 'lib/redis.rb', line 353 def set_inter_store(destkey, *keys) write "SINTERSTORE #{destkey} #{keys.join(' ')}\r\n" get_response end |
#set_intersect(*keys) ⇒ Object
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# File 'lib/redis.rb', line 348 def set_intersect(*keys) write "SINTER #{keys.join(' ')}\r\n" Set.new(get_response) end |
#set_member?(key, member) ⇒ Boolean
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# File 'lib/redis.rb', line 331 def set_member?(key, member) write "SISMEMBER #{key} #{member.to_s.size}\r\n#{member}\r\n" case get_response when 1 true when 0 false when -2 raise RedisError, "key: #{key} contains a non set value" end end |
#set_members(key) ⇒ Object
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# File 'lib/redis.rb', line 343 def set_members(key) write "SMEMBERS #{key}\r\n" Set.new(get_response) end |
#set_union(*keys) ⇒ Object
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# File 'lib/redis.rb', line 358 def set_union(*keys) write "SUNION #{keys.join(' ')}\r\n" Set.new(get_response) end |
#set_union_store(destkey, *keys) ⇒ Object
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# File 'lib/redis.rb', line 363 def set_union_store(destkey, *keys) write "SUNIONSTORE #{destkey} #{keys.join(' ')}\r\n" get_response end |
#set_unless_exists(key, val) ⇒ Object
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# File 'lib/redis.rb', line 432 def set_unless_exists(key, val) write "SETNX #{key} #{val.to_s.size}\r\n#{val}\r\n" get_response == 1 end |
#single_line ⇒ Object
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# File 'lib/redis.rb', line 477 def single_line buff = "" while buff[-2..-1] != "\r\n" buff << read(1) end puts "single_line value is #{buff[0..-3].inspect}" if $debug buff[0..-3] end |
#sort(key, opts = {}) ⇒ Object
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# File 'lib/redis.rb', line 378 def sort(key, opts={}) cmd = "SORT #{key}" cmd << " BY #{opts[:by]}" if opts[:by] cmd << " GET #{opts[:get]}" if opts[:get] cmd << " INCR #{opts[:incr]}" if opts[:incr] cmd << " DEL #{opts[:del]}" if opts[:del] cmd << " DECR #{opts[:decr]}" if opts[:decr] cmd << " #{opts[:order]}" if opts[:order] cmd << " LIMIT #{opts[:limit].join(' ')}" if opts[:limit] cmd << "\r\n" write(cmd) get_response end |
#status_code_reply ⇒ Object
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# File 'lib/redis.rb', line 437 def status_code_reply begin res = read_proto if res.index('-') == 0 raise RedisError, res else true end rescue RedisError raise RedisError end end |
#to_s ⇒ Object
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# File 'lib/redis.rb', line 35 def to_s "#{host}:#{port}" end |
#type?(key) ⇒ Boolean
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# File 'lib/redis.rb', line 240 def type?(key) write "TYPE #{key}\r\n" get_response end |
#with_socket_management(server, &block) ⇒ Object
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# File 'lib/redis.rb', line 47 def with_socket_management(server, &block) begin block.call(server.socket) #Timeout or server down rescue Errno::ECONNRESET, Errno::EPIPE, Errno::ECONNREFUSED => e server.close puts "Client (#{server.inspect}) disconnected from server: #{e.inspect}\n" if $debug retry #Server down rescue NoMethodError => e puts "Client (#{server.inspect}) tryin server that is down: #{e.inspect}\n Dying!" if $debug raise Errno::ECONNREFUSED #exit end end |
#write(data) ⇒ Object
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# File 'lib/redis.rb', line 135 def write(data) with_socket_management(@server) do |socket| puts "writing: #{data}" if $debug socket.write(data) end end |