S*STORE now return the cardinality of the resulting set

[redis.git] / client-libraries / ruby_2 / rubyredis.rb

diff --git a/client-libraries/ruby_2/rubyredis.rb b/client-libraries/ruby_2/rubyredis.rb
index a6a7408f40963f12c06b77cd8adcda44695396ca..38823206eac34372d2416508dab0bd8c460a8568 100644 (file)
--- a/client-libraries/ruby_2/rubyredis.rb
+++ b/client-libraries/ruby_2/rubyredis.rb
@@ -6,6 +6,19 @@
 # method_missing instead.
 
 require 'socket'
 # method_missing instead.
 
 require 'socket'

+require 'set'
+
+begin
+    if (RUBY_VERSION >= '1.9')
+        require 'timeout'
+        RedisTimer = Timeout
+    else
+        require 'system_timer'
+        RedisTimer = SystemTimer
+    end
+rescue LoadError
+    RedisTimer = nil
+end

 
 class RedisClient
     BulkCommands = {
 
 class RedisClient
     BulkCommands = {


@@ -14,13 +27,75 @@ class RedisClient
         "echo"=>true, "getset"=>true, "smove"=>true
     }
 
         "echo"=>true, "getset"=>true, "smove"=>true
     }
 

+    ConvertToBool = lambda{|r| r == 0 ? false : r}
+    ConvertToSet = lambda{|r| Set.new(r)}
+
+    ReplyProcessor = {
+        "exists" => ConvertToBool,
+        "sismember"=> ConvertToBool,
+        "sadd"=> ConvertToBool,
+        "srem"=> ConvertToBool,
+        "smove"=> ConvertToBool,
+        "move"=> ConvertToBool,
+        "setnx"=> ConvertToBool,
+        "del"=> ConvertToBool,
+        "renamenx"=> ConvertToBool,
+        "expire"=> ConvertToBool,
+        "smembers" => ConvertToSet,
+        "sinter" => ConvertToSet,
+        "sunion" => ConvertToSet,
+        "sdiff" => ConvertToSet,
+        "keys" => lambda{|r| r.split(" ")},
+        "info" => lambda{|r| 
+            info = {}
+            r.each_line {|kv|
+                k,v = kv.split(":",2).map{|x| x.chomp}
+                info[k.to_sym] = v
+            }
+            info
+        }
+    }
+
+    Aliases = {
+        "flush_db" => "flushdb",
+        "flush_all" => "flushall",
+        "last_save" => "lastsave",
+        "key?" => "exists",
+        "delete" => "del",
+        "randkey" => "randomkey",
+        "list_length" => "llen",
+        "push_tail" => "rpush",
+        "push_head" => "lpush",
+        "pop_tail" => "rpop",
+        "pop_head" => "lpop",
+        "list_set" => "lset",
+        "list_range" => "lrange",
+        "list_trim" => "ltrim",
+        "list_index" => "lindex",
+        "list_rm" => "lrem",
+        "set_add" => "sadd",
+        "set_delete" => "srem",
+        "set_count" => "scard",
+        "set_member?" => "sismember",
+        "set_members" => "smembers",
+        "set_intersect" => "sinter",
+        "set_intersect_store" => "sinterstore",
+        "set_inter_store" => "sinterstore",
+        "set_union" => "sunion",
+        "set_union_store" => "sunionstore",
+        "set_diff" => "sdiff",
+        "set_diff_store" => "sdiffstore",
+        "set_move" => "smove",
+        "set_unless_exists" => "setnx",
+        "rename_unless_exists" => "renamenx"
+    }
+

     def initialize(opts={})
     def initialize(opts={})

-        opts = {:host => 'localhost', :port => '6379', :db => 0}.merge(opts)
-        @host = opts[:host]
-        @port = opts[:port]
-        @db = opts[:db]
-        @sock = connect_to_server
-        call_command(["select",@db]) if @db != 0
+        @host = opts[:host] || '127.0.0.1'
+        @port = opts[:port] || 6379
+        @db = opts[:db] || 0
+        @timeout = opts[:timeout] || 0
+        connect_to_server

     end
 
     def to_s
     end
 
     def to_s


@@ -28,7 +103,36 @@ class RedisClient
     end
 
     def connect_to_server
     end
 
     def connect_to_server

-        TCPSocket.new(@host, @port, 0)
+        @sock = connect_to(@host,@port,@timeout == 0 ? nil : @timeout)
+        call_command(["select",@db]) if @db != 0
+    end
+
+    def connect_to(host, port, timeout=nil)
+        # We support connect() timeout only if system_timer is availabe
+        # or if we are running against Ruby >= 1.9
+        # Timeout reading from the socket instead will be supported anyway.
+        if @timeout != 0 and RedisTimer
+            begin
+                sock = TCPSocket.new(host, port, 0)
+            rescue Timeout::Error
+                @sock = nil
+                raise Timeout::Error, "Timeout connecting to the server"
+            end
+        else
+            sock = TCPSocket.new(host, port, 0)
+        end
+
+        # If the timeout is set we set the low level socket options in order
+        # to make sure a blocking read will return after the specified number
+        # of seconds. This hack is from memcached ruby client.
+        if timeout
+            secs = Integer(timeout)
+            usecs = Integer((timeout - secs) * 1_000_000)
+            optval = [secs, usecs].pack("l_2")
+            sock.setsockopt Socket::SOL_SOCKET, Socket::SO_RCVTIMEO, optval
+            sock.setsockopt Socket::SOL_SOCKET, Socket::SO_SNDTIMEO, optval
+        end
+        sock

     end
 
     def method_missing(*argv)
     end
 
     def method_missing(*argv)


@@ -36,44 +140,103 @@ class RedisClient
     end
 
     def call_command(argv)
     end
 
     def call_command(argv)

+        # this wrapper to raw_call_command handle reconnection on socket
+        # error. We try to reconnect just one time, otherwise let the error
+        # araise.
+        connect_to_server if !@sock
+        begin
+            raw_call_command(argv)
+        rescue Errno::ECONNRESET
+            @sock.close
+            connect_to_server
+            raw_call_command(argv)
+        end
+    end
+
+    def raw_call_command(argv)

         bulk = nil
         argv[0] = argv[0].to_s.downcase
         bulk = nil
         argv[0] = argv[0].to_s.downcase

+        argv[0] = Aliases[argv[0]] if Aliases[argv[0]]

         if BulkCommands[argv[0]]
         if BulkCommands[argv[0]]

-            bulk = argv[-1]
+            bulk = argv[-1].to_s

             argv[-1] = bulk.length
         end
         @sock.write(argv.join(" ")+"\r\n")
         @sock.write(bulk+"\r\n") if bulk
             argv[-1] = bulk.length
         end
         @sock.write(argv.join(" ")+"\r\n")
         @sock.write(bulk+"\r\n") if bulk

-        read_reply
+
+        # Post process the reply if needed
+        processor = ReplyProcessor[argv[0]]
+        processor ? processor.call(read_reply) : read_reply

     end
 
     def select(*args)
         raise "SELECT not allowed, use the :db option when creating the object"
     end
 
     end
 
     def select(*args)
         raise "SELECT not allowed, use the :db option when creating the object"
     end
 

+    def [](key)
+        get(key)
+    end
+
+    def []=(key,value)
+        set(key,value)
+    end
+
+    def sort(key, opts={})
+        cmd = []
+        cmd << "SORT #{key}"
+        cmd << "BY #{opts[:by]}" if opts[:by]
+        cmd << "GET #{[opts[:get]].flatten * ' GET '}" if opts[:get]
+        cmd << "#{opts[:order]}" if opts[:order]
+        cmd << "LIMIT #{opts[:limit].join(' ')}" if opts[:limit]
+        call_command(cmd)
+    end
+
+    def incr(key,increment=nil)
+        call_command(increment ? ["incrby",key,increment] :  ["incr",key])
+    end
+
+    def decr(key,decrement=nil)
+        call_command(decrement ? ["decrby",key,decrement] :  ["decr",key])
+    end
+

     def read_reply
     def read_reply

+        # We read the first byte using read() mainly because gets() is
+        # immune to raw socket timeouts.
+        begin
+            rtype = @sock.read(1)
+        rescue Errno::EAGAIN
+            # We want to make sure it reconnects on the next command after the
+            # timeout. Otherwise the server may reply in the meantime leaving
+            # the protocol in a desync status.
+            @sock = nil
+            raise Errno::EAGAIN, "Timeout reading from the socket"
+        end
+
+        raise Errno::ECONNRESET,"Connection lost" if !rtype

         line = @sock.gets
         line = @sock.gets

-        case line[0..0]
+        case rtype

         when "-"
         when "-"

-            raise line.strip
+            raise "-"+line.strip

         when "+"
         when "+"

-            line[1..-1].strip
+            line.strip

         when ":"
         when ":"

-            line[1..-1].to_i
+            line.to_i

         when "$"
         when "$"

-            bulklen = line[1..-1].to_i
+            bulklen = line.to_i

             return nil if bulklen == -1
             data = @sock.read(bulklen)
             @sock.read(2) # CRLF
             data
         when "*"
             return nil if bulklen == -1
             data = @sock.read(bulklen)
             @sock.read(2) # CRLF
             data
         when "*"

-            objects = line[1..-1].to_i
+            objects = line.to_i

             return nil if bulklen == -1
             res = []
             objects.times {
                 res << read_reply
             }
             res
             return nil if bulklen == -1
             res = []
             objects.times {
                 res << read_reply
             }
             res

+        else
+            raise "Protocol error, got '#{rtype}' as initial reply byte"

         end
     end
 end
         end
     end
 end