Class: Redis::Namespace
- Inherits:
-
Object
- Object
- Redis::Namespace
- Defined in:
- lib/redis/namespace.rb,
lib/redis/namespace/version.rb
Constant Summary collapse
- NAMESPACED_COMMANDS =
The following tables define how input parameters and result values should be modified for the namespace.
COMMANDS is a hash. Each key is the name of a command and each value is a two element array.
The first element in the value array describes how to modify the arguments passed. It can be one of:
nil Do nothing. :first Add the namespace to the first argument passed, e.g. GET key => GET namespace:key :all Add the namespace to all arguments passed, e.g. MGET key1 key2 => MGET namespace:key1 namespace:key2 :exclude_first Add the namespace to all arguments but the first, e.g. :exclude_last Add the namespace to all arguments but the last, e.g. BLPOP key1 key2 timeout => BLPOP namespace:key1 namespace:key2 timeout :exclude_options Add the namespace to all arguments, except the last argument, if the last argument is a hash of options. ZUNIONSTORE key1 2 key2 key3 WEIGHTS 2 1 => ZUNIONSTORE namespace:key1 2 namespace:key2 namespace:key3 WEIGHTS 2 1 :alternate Add the namespace to every other argument, e.g. MSET key1 value1 key2 value2 => MSET namespace:key1 value1 namespace:key2 value2 :sort Add namespace to first argument if it is non-nil Add namespace to second arg's :by and :store if second arg is a Hash Add namespace to each element in second arg's :get if second arg is a Hash; forces second arg's :get to be an Array if present. :eval_style Add namespace to each element in keys argument (via options hash or multi-args) :scan_style Add namespace to :match option, or supplies "#{namespace}:*" if not present.
The second element in the value array describes how to modify the return value of the Redis call. It can be one of:
nil Do nothing. :all Add the namespace to all elements returned, e.g. key1 key2 => namespace:key1 namespace:key2
{ "append" => [ :first ], "bitcount" => [ :first ], "bitop" => [ :exclude_first ], "blpop" => [ :exclude_last, :first ], "brpop" => [ :exclude_last, :first ], "brpoplpush" => [ :exclude_last ], "debug" => [ :exclude_first ], "decr" => [ :first ], "decrby" => [ :first ], "del" => [ :all ], "dump" => [ :first ], "exists" => [ :first ], "expire" => [ :first ], "expireat" => [ :first ], "eval" => [ :eval_style ], "evalsha" => [ :eval_style ], "get" => [ :first ], "getbit" => [ :first ], "getrange" => [ :first ], "getset" => [ :first ], "hset" => [ :first ], "hsetnx" => [ :first ], "hget" => [ :first ], "hincrby" => [ :first ], "hincrbyfloat" => [ :first ], "hmget" => [ :first ], "hmset" => [ :first ], "hdel" => [ :first ], "hexists" => [ :first ], "hlen" => [ :first ], "hkeys" => [ :first ], "hscan" => [ :first ], "hscan_each" => [ :first ], "hvals" => [ :first ], "hgetall" => [ :first ], "incr" => [ :first ], "incrby" => [ :first ], "incrbyfloat" => [ :first ], "keys" => [ :first, :all ], "lindex" => [ :first ], "linsert" => [ :first ], "llen" => [ :first ], "lpop" => [ :first ], "lpush" => [ :first ], "lpushx" => [ :first ], "lrange" => [ :first ], "lrem" => [ :first ], "lset" => [ :first ], "ltrim" => [ :first ], "mapped_hmset" => [ :first ], "mapped_hmget" => [ :first ], "mapped_mget" => [ :all, :all ], "mapped_mset" => [ :all ], "mapped_msetnx" => [ :all ], "mget" => [ :all ], "monitor" => [ :monitor ], "move" => [ :first ], "mset" => [ :alternate ], "msetnx" => [ :alternate ], "object" => [ :exclude_first ], "persist" => [ :first ], "pexpire" => [ :first ], "pexpireat" => [ :first ], "pfadd" => [ :first ], "pfcount" => [ :all ], "pfmerge" => [ :all ], "psetex" => [ :first ], "psubscribe" => [ :all ], "pttl" => [ :first ], "publish" => [ :first ], "punsubscribe" => [ :all ], "rename" => [ :all ], "renamenx" => [ :all ], "restore" => [ :first ], "rpop" => [ :first ], "rpoplpush" => [ :all ], "rpush" => [ :first ], "rpushx" => [ :first ], "sadd" => [ :first ], "scard" => [ :first ], "scan" => [ :scan_style, :second ], "scan_each" => [ :scan_style, :all ], "sdiff" => [ :all ], "sdiffstore" => [ :all ], "set" => [ :first ], "setbit" => [ :first ], "setex" => [ :first ], "setnx" => [ :first ], "setrange" => [ :first ], "sinter" => [ :all ], "sinterstore" => [ :all ], "sismember" => [ :first ], "smembers" => [ :first ], "smove" => [ :exclude_last ], "sort" => [ :sort ], "spop" => [ :first ], "srandmember" => [ :first ], "srem" => [ :first ], "sscan" => [ :first ], "sscan_each" => [ :first ], "strlen" => [ :first ], "subscribe" => [ :all ], "sunion" => [ :all ], "sunionstore" => [ :all ], "ttl" => [ :first ], "type" => [ :first ], "unsubscribe" => [ :all ], "zadd" => [ :first ], "zcard" => [ :first ], "zcount" => [ :first ], "zincrby" => [ :first ], "zinterstore" => [ :exclude_options ], "zrange" => [ :first ], "zrangebyscore" => [ :first ], "zrank" => [ :first ], "zrem" => [ :first ], "zremrangebyrank" => [ :first ], "zremrangebyscore" => [ :first ], "zrevrange" => [ :first ], "zrevrangebyscore" => [ :first ], "zrevrank" => [ :first ], "zscan" => [ :first ], "zscan_each" => [ :first ], "zscore" => [ :first ], "zunionstore" => [ :exclude_options ], "[]" => [ :first ], "[]=" => [ :first ] }
- TRANSACTION_COMMANDS =
{ "discard" => [], "exec" => [], "multi" => [], "unwatch" => [ :all ], "watch" => [ :all ], }
- HELPER_COMMANDS =
{ "auth" => [], "disconnect!" => [], "echo" => [], "ping" => [], "time" => [], }
- ADMINISTRATIVE_COMMANDS =
{ "bgrewriteaof" => [], "bgsave" => [], "config" => [], "dbsize" => [], "flushall" => [], "flushdb" => [], "info" => [], "lastsave" => [], "quit" => [], "randomkey" => [], "save" => [], "script" => [], "select" => [], "shutdown" => [], "slaveof" => [], }
- DEPRECATED_COMMANDS =
[ ADMINISTRATIVE_COMMANDS ].compact.reduce(:merge)
- COMMANDS =
[ NAMESPACED_COMMANDS, TRANSACTION_COMMANDS, HELPER_COMMANDS, ADMINISTRATIVE_COMMANDS, ].compact.reduce(:merge)
- Enumerator =
Support 1.8.7 by providing a namespaced reference to Enumerable::Enumerator
Enumerable::Enumerator
- VERSION =
'1.5.3'
Instance Attribute Summary collapse
- #namespace(desired_namespace = nil) ⇒ Object
-
#redis ⇒ Object
readonly
Returns the value of attribute redis.
-
#warning ⇒ Object
Returns the value of attribute warning.
Instance Method Summary collapse
- #call_with_namespace(command, *args, &block) ⇒ Object
- #client ⇒ Object
- #deprecations? ⇒ Boolean
- #eval(*args) ⇒ Object
- #exec ⇒ Object
-
#initialize(namespace, options = {}) ⇒ Namespace
constructor
A new instance of Namespace.
- #inspect ⇒ Object
- #keys(query = nil) ⇒ Object
- #method_missing(command, *args, &block) ⇒ Object
- #multi(&block) ⇒ Object
- #pipelined(&block) ⇒ Object
-
#respond_to?(command, include_private = false) ⇒ Boolean
emulate Ruby 1.9+ and keep respond_to_missing? logic together.
- #respond_to_missing?(command, include_all = false) ⇒ Boolean
- #self_respond_to? ⇒ Object
-
#type(key) ⇒ Object
Ruby defines a now deprecated type method so we need to override it here since it will never hit method_missing.
- #warning? ⇒ Boolean
Constructor Details
#initialize(namespace, options = {}) ⇒ Namespace
Returns a new instance of Namespace.
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# File 'lib/redis/namespace.rb', line 235 def initialize(namespace, = {}) @namespace = namespace @redis = [:redis] || Redis.current @warning = !!.fetch(:warning) do !ENV['REDIS_NAMESPACE_QUIET'] end @deprecations = !!.fetch(:deprecations) do ENV['REDIS_NAMESPACE_DEPRECATIONS'] end end |
Dynamic Method Handling
This class handles dynamic methods through the method_missing method
#method_missing(command, *args, &block) ⇒ Object
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# File 'lib/redis/namespace.rb', line 304 def method_missing(command, *args, &block) normalized_command = command.to_s.downcase if ADMINISTRATIVE_COMMANDS.include?(normalized_command) # administrative commands usage is deprecated and will be removed in 2.0 # redis-namespace cannot safely apply a namespace to their effects. return super if deprecations? if warning? warn("Passing '#{normalized_command}' command to redis as is; " + "administrative commands cannot be effectively namespaced " + "and should be called on the redis connection directly; " + "passthrough has been deprecated and will be removed in " + "redis-namespace 2.0 (at #{call_site})" ) end call_with_namespace(command, *args, &block) elsif COMMANDS.include?(normalized_command) call_with_namespace(command, *args, &block) elsif @redis.respond_to?(normalized_command) && !deprecations? # blind passthrough is deprecated and will be removed in 2.0 # redis-namespace does not know how to handle this command. # Passing it to @redis as is, where redis-namespace shows # a warning message if @warning is set. if warning? warn("Passing '#{command}' command to redis as is; blind " + "passthrough has been deprecated and will be removed in " + "redis-namespace 2.0 (at #{call_site})") end @redis.send(command, *args, &block) else super end end |
Instance Attribute Details
#namespace(desired_namespace = nil) ⇒ Object
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# File 'lib/redis/namespace.rb', line 287 def namespace(desired_namespace = nil) if desired_namespace yield Redis::Namespace.new(desired_namespace, :redis => @redis) end @namespace end |
#redis ⇒ Object (readonly)
Returns the value of attribute redis.
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# File 'lib/redis/namespace.rb', line 232 def redis @redis end |
#warning ⇒ Object
Returns the value of attribute warning.
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# File 'lib/redis/namespace.rb', line 233 def warning @warning end |
Instance Method Details
#call_with_namespace(command, *args, &block) ⇒ Object
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# File 'lib/redis/namespace.rb', line 358 def call_with_namespace(command, *args, &block) handling = COMMANDS[command.to_s.downcase] if handling.nil? fail("Redis::Namespace does not know how to handle '#{command}'.") end (before, after) = handling # Modify the local *args array in-place, no need to copy it. args.map! {|arg| clone_args(arg)} # Add the namespace to any parameters that are keys. case before when :first args[0] = add_namespace(args[0]) if args[0] when :all args = add_namespace(args) when :exclude_first first = args.shift args = add_namespace(args) args.unshift(first) if first when :exclude_last last = args.pop unless args.length == 1 args = add_namespace(args) args.push(last) if last when :exclude_options if args.last.is_a?(Hash) last = args.pop args = add_namespace(args) args.push(last) else args = add_namespace(args) end when :alternate args.each_with_index { |a, i| args[i] = add_namespace(a) if i.even? } when :sort args[0] = add_namespace(args[0]) if args[0] if args[1].is_a?(Hash) [:by, :store].each do |key| args[1][key] = add_namespace(args[1][key]) if args[1][key] end args[1][:get] = Array(args[1][:get]) args[1][:get].each_index do |i| args[1][:get][i] = add_namespace(args[1][:get][i]) unless args[1][:get][i] == "#" end end when :eval_style # redis.eval() and evalsha() can either take the form: # # redis.eval(script, [key1, key2], [argv1, argv2]) # # Or: # # redis.eval(script, :keys => ['k1', 'k2'], :argv => ['arg1', 'arg2']) # # This is a tricky + annoying special case, where we only want the `keys` # argument to be namespaced. if args.last.is_a?(Hash) args.last[:keys] = add_namespace(args.last[:keys]) else args[1] = add_namespace(args[1]) end when :scan_style = (args.last.kind_of?(Hash) ? args.pop : {}) [:match] = add_namespace(.fetch(:match, '*')) args << if block original_block = block block = proc { |key| original_block.call rem_namespace(key) } end end # Dispatch the command to Redis and store the result. result = @redis.send(command, *args, &block) # Don't try to remove namespace from a Redis::Future, you can't. return result if result.is_a?(Redis::Future) # Remove the namespace from results that are keys. case after when :all result = rem_namespace(result) when :first result[0] = rem_namespace(result[0]) if result when :second result[1] = rem_namespace(result[1]) if result end result end |
#client ⇒ Object
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# File 'lib/redis/namespace.rb', line 254 def client @redis.client end |
#deprecations? ⇒ Boolean
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# File 'lib/redis/namespace.rb', line 246 def deprecations? @deprecations end |
#eval(*args) ⇒ Object
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# File 'lib/redis/namespace.rb', line 300 def eval(*args) call_with_namespace(:eval, *args) end |
#exec ⇒ Object
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# File 'lib/redis/namespace.rb', line 296 def exec call_with_namespace(:exec) end |
#inspect ⇒ Object
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# File 'lib/redis/namespace.rb', line 338 def inspect "<#{self.class.name} v#{VERSION} with client v#{Redis::VERSION} "\ "for #{@redis.id}/#{@namespace}>" end |
#keys(query = nil) ⇒ Object
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# File 'lib/redis/namespace.rb', line 271 def keys(query = nil) call_with_namespace(:keys, query || '*') end |
#multi(&block) ⇒ Object
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# File 'lib/redis/namespace.rb', line 275 def multi(&block) if block_given? namespaced_block(:multi, &block) else call_with_namespace(:multi) end end |
#pipelined(&block) ⇒ Object
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# File 'lib/redis/namespace.rb', line 283 def pipelined(&block) namespaced_block(:pipelined, &block) end |
#respond_to?(command, include_private = false) ⇒ Boolean
emulate Ruby 1.9+ and keep respond_to_missing? logic together.
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# File 'lib/redis/namespace.rb', line 267 def respond_to?(command, include_private=false) super or respond_to_missing?(command, include_private) end |
#respond_to_missing?(command, include_all = false) ⇒ Boolean
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# File 'lib/redis/namespace.rb', line 343 def respond_to_missing?(command, include_all=false) normalized_command = command.to_s.downcase case when DEPRECATED_COMMANDS.include?(normalized_command) !deprecations? when COMMANDS.include?(normalized_command) true when !deprecations? && redis.respond_to?(command, include_all) true else defined?(super) && super end end |
#self_respond_to? ⇒ Object
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# File 'lib/redis/namespace.rb', line 264 alias_method :self_respond_to?, :respond_to? |
#type(key) ⇒ Object
Ruby defines a now deprecated type method so we need to override it here since it will never hit method_missing
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# File 'lib/redis/namespace.rb', line 260 def type(key) call_with_namespace(:type, key) end |
#warning? ⇒ Boolean
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# File 'lib/redis/namespace.rb', line 250 def warning? @warning end |