Class: ROC::Store::TransientStore

Inherits:
ROCStore
  • Object
show all
Includes:
ObjectInitializers
Defined in:
lib/roc/store/transient_store.rb

Constant Summary collapse

KEYSPACES = 
{}
MDSPACES = 
{}

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from ObjectInitializers

#class_for_key, #find, #init, #init_float, #init_hash, #init_integer, #init_list, #init_lock, #init_set, #init_sorted_set, #init_string, #init_time

Constructor Details

#initialize(name = nil) ⇒ TransientStore

Returns a new instance of TransientStore.



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# File 'lib/roc/store/transient_store.rb', line 13

def initialize(name=nil)
  if name.nil?
    @keyspace = {}
    @mdspace = {}
  else
    @name = name.to_s
    TransientStore::KEYSPACES[@name] ||= {}
    TransientStore::MDSPACES[@name] ||= {}
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(*args) ⇒ Object (protected)

end of redis methods



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# File 'lib/roc/store/transient_store.rb', line 1431

def method_missing(*args)
  puts "unimplemented: #{args}"
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/roc/store/transient_store.rb', line 11

def name
  @name
end

Instance Method Details

#append(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 306

def append(key, val)
  if self.exists(key)
    with_type(key, 'string') do
      self.keyspace[key.to_s] << val.to_s
    end
  else
    self.set(key, val)
  end
  self.strlen(key)
end

#blpop ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 640

def blpop
  raise "blocking methods not implemented"
end

#brpop ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 644

def brpop
  raise "blocking methods not implemented"
end

#brpoplpush ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 648

def brpoplpush
  raise "blocking methods not implemented"
end

#call(method_name, *args) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 64

def call(method_name, *args)
  if @multi_mode
    @multi_calls << [method_name, *args]
    'QUEUED'
  else
    self.send method_name, *args
  end
end

#decr(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 412

def decr(key)
  self.incrby(key, -1)
end

#decrby(key, by) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 416

def decrby(key, by)
  self.incrby(key, -by)
end

#del(*keys) ⇒ Object

All keys



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# File 'lib/roc/store/transient_store.rb', line 77

def del(*keys)
  keys.each{|key| expunge_if_expired(key)}
  i = 0
  keys.each do |key|
    if self.exists(key)
      self.expunge(key)
      i += 1
    end
  end
  if keys.size > 1
    true
  else
    i
  end
end

#discard ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1258

def discard
  if @multi_mode
    @multi_mode = false
    @multi_calls = []          
  else
    raise "discard without a multi"
  end
end

#enable_eval ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1441

def enable_eval
  require 'roc/store/transient_eval'
  if !self.class.include?(ROC::Store::TransientEval)          
    self.class.send(:include, ROC::Store::TransientEval)
  end
end

#exec ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1244

def exec
  if @multi_mode
    ret = []
    @multi_mode = false
    @multi_calls.each do |call|
      ret << (self.call *call)
    end
    @multi_calls = []
    ret
  else
    raise "exec without a multi"
  end
end

#exists(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 93

def exists(key)
  expunge_if_expired(key)
  self.keyspace.has_key?(key.to_s)
end

#expire(key, secs) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 98

def expire(key, secs)
  self.expireat(key, ::Time.now.to_i + secs.to_i)
end

#expireat(key, epoch) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 102

def expireat(key, epoch)
  if self.exists(key)
    self.mdspace[key.to_s] ||= {}
    self.mdspace[key.to_s][:expire_at] = epoch.to_i
    true
  else
    false
  end
end

#flushdb ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1284

def flushdb
  if self.shared?
    TransientStore::KEYSPACES[self.name] = {}
    TransientStore::MDSPACES[self.name]  ={}
  else
    @keyspace = {}
    @mdspace = {}
  end
end

#get(key) ⇒ Object

Strings



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# File 'lib/roc/store/transient_store.rb', line 235

def get(key)
  with_type(key, 'string') do
    expunge_if_expired(key)  
    v = self.keyspace[key.to_s]
    v.nil? ? nil : v.dup
  end
end

#getbit(key, index) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/roc/store/transient_store.rb', line 317

def getbit(key, index)
  raise ArgumentError, 'setbit takes a non-negative index' unless index > 0

  bitstring = self.get(key).unpack('B*')[0]
  if index < bitstring.length
    if RUBY_VERSION.match(/^1\.8/)
      bitstring[index].chr.to_i
    else
      bitstring[index].to_i
    end
  else
    0
  end
end

#getrange(key, first_index, last_index) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 353

def getrange(key, first_index, last_index)
  if self.exists(key)
    with_type(key, 'string') do
      arr = self.keyspace[key.to_s].bytes.to_a[first_index..last_index]
      if arr
        arr.map{|c| c.chr}.join('')
      else
        ''
      end
    end
  else
    ''
  end
end

#getset(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 257

def getset(key, val)
  current_val = self.get(key)
  self.set(key, val)
  current_val
end

#hdel(key, field) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1184

def hdel(key, field)
  with_type(key, 'hash') do
    hsh = self.keyspace[key.to_s]
    ret = self.exists(key) && !!hsh.delete(field.to_s)
    if 0 == hsh.size
      self.del(key)
    end
    ret
  end
end

#hexists(key, field) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1126

def hexists(key, field)
  with_type(key, 'hash') do
    self.exists(key) && self.keyspace[key.to_s].has_key?(field.to_s)
  end
end

#hget(key, field) ⇒ Object

Hashes



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# File 'lib/roc/store/transient_store.rb', line 1114

def hget(key, field)
  with_type(key, 'hash') do
    expunge_if_expired(key)  
    hsh = self.keyspace[key.to_s]
    if !hsh.nil? && hsh.has_key?(field.to_s)
      hsh[field.to_s].dup
    else
      nil
    end
  end
end

#hgetall(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1149

def hgetall(key)
  with_type(key, 'hash') do
    hsh = self.keyspace[key.to_s]
    if hsh
      hsh.dup
    else
      {}
    end
  end
end

#hincrby(key, field, by) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1195

def hincrby(key, field, by)
  raise "value (#{by}) is not an integer" unless (by.is_a?(::Integer) || by.floor == by)
  val = self.hget(key, field)
  new_val = val.to_i + by.to_i
  self.hset(key, field, new_val)
  new_val
end

#hkeys(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1160

def hkeys(key)        
  if hsh = self.hgetall(key)
    hsh.keys
  else
    []
  end
end

#hlen(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1176

def hlen(key)        
  if hsh = self.hgetall(key)
    hsh.size
  else
    0
  end
end

#hmget(key, *fields) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1203

def hmget(key, *fields)
  fields.map{|f| self.hget(key, f)}        
end

#hmset(key, *pairs) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1207

def hmset(key, *pairs)
  i = 0
  while i < pairs.length
    self.hset(key, pairs[i], pairs[i+1])
    i += 2
  end
  true
end

#hset(key, field, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1132

def hset(key, field, val)
  with_type(key, 'hash') do
    f = field.to_s
    v = if val.is_a?(::String)
          val.dup
        else
          val.to_s
        end
    if !self.exists(key)
      self.keyspace[key.to_s] = {}
    end
    ret = !self.keyspace[key.to_s].has_key?(f)
    self.keyspace[key.to_s][f] = v
    ret
  end
end

#hsetnx(key, field, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1216

def hsetnx(key, field, val)
  if self.hexists(key, field)
    false
  else
    self.hset(key, field, val)
  end
end

#hvals(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1168

def hvals(key)        
  if hsh = self.hgetall(key)
    hsh.values
  else
    []
  end
end

#in_multi? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/roc/store/transient_store.rb', line 1267

def in_multi?
  !!@multi_mode
end

#incr(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 400

def incr(key)
  self.incrby(key, 1)
end

#incrby(key, by) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 404

def incrby(key, by)
  raise "value (#{by}) is not an integer" unless by.is_a?(::Integer)
  val = self.get(key)
  new_val = val.to_i + by
  self.set(key, new_val.to_s)
  new_val
end

#inspect ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1437

def inspect
  "<#{self.class} @name=#{self.name.inspect}>"
end

#keys(pattern = '*') ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 112

def keys(pattern='*')
  if '*' == pattern
    self.keyspace.keys
  else
    raise "patterns not implemented yet"
  end
end

#lindex(key, ind) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 520

def lindex(key, ind)
  with_type(key, 'list') do          
    if !self.exists(key)
      nil
    else
      v = self.keyspace[key.to_s][ind]
      v.nil? ? nil : v.dup
    end
  end
end

#linsert(key, where, pivot, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 614

def linsert(key, where, pivot, val)
  if !['before', 'after'].include?(where.to_s.downcase)
    raise ArgumentError "BEFORE or AFTER please"
  else
    if self.exists(key)
      ind = self.keyspace[key.to_s].index(pivot)
      if ind
        if 'after' == where
          ind +=1
        end
        v = if val.is_a?(::String)
              val.dup
            else
              val.to_s
            end
        self.keyspace[key.to_s].insert(ind, v)
        self.keyspace[key.to_s].size
      else
        -1
      end
    else
      0
    end
  end
end

#llen(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 434

def llen(key)
  with_type(key, 'list') do
    expunge_if_expired(key)  
    val = self.keyspace[key.to_s]
    if val.nil?
      0
    else
      val.size
    end
  end
end

#lpop(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 506

def lpop(key)
  with_type(key, 'list') do          
    if !self.exists(key)
      nil
    else
      val = self.keyspace[key.to_s].shift
      if 0 == self.llen(key)
        self.del(key)
      end
      val
    end
  end
end

#lpush(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 469

def lpush(key, val)
  with_type(key, 'list') do
    if !self.exists(key)
      self.keyspace[key.to_s] = []
    end
    v = if val.is_a?(::String)
          val.dup
        else
          val.to_s
        end
    self.keyspace[key.to_s].unshift(v)
    self.keyspace[key.to_s].size
  end
end

#lpushx(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 484

def lpushx(key, val)
  if self.exists(key)
    self.lpush(key, val)
  else
    0
  end
end

#lrange(key, start_index, stop_index) ⇒ Object

Lists



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# File 'lib/roc/store/transient_store.rb', line 422

def lrange(key, start_index, stop_index)
  with_type(key, 'list') do
    expunge_if_expired(key)  
    val = self.keyspace[key.to_s]
    if val.nil? || (start_index >= val.size) || ( (start_index < 0) && (stop_index < start_index) )
      []
    else
      val[start_index..stop_index] || [] ## never return nil -- happens if start_index is neg and before begining of list
    end
  end
end

#lrem(key, count, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 550

def lrem(key, count, val)
  with_type(key, 'list') do
    if self.exists(key)
      iterator = self.keyspace[key.to_s]
      limit = iterator.size
      reverse = false
      if count > 0
        limit = count
      elsif count < 0
        limit = count.abs
        iterator = iterator.reverse
        reverse = true
      end
      indexes_to_del = []
      v = val.to_s
      iterator.each_with_index do |test, i|
        if test == v
          if reverse
            indexes_to_del.unshift iterator.size - (i + 1)
          else
            indexes_to_del << i
          end
        end
        if indexes_to_del.size == limit
          break
        end
      end
      correction = 0
      indexes_to_del.each do |i| 
        self.keyspace[key.to_s].delete_at(i - correction)
        correction += 1
      end

      if 0 == self.llen(key)
        self.del(key)
      end

      indexes_to_del.size
    else
      0
    end
  end          
end

#lset(key, ind, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 531

def lset(key, ind, val)
  with_type(key, 'list') do
    expunge_if_expired(key)  
    arr = self.keyspace[key.to_s]
    if arr.nil?
      raise ArgumentError, "No such key: #{key}"
    elsif ((ind < 0) && (ind < -arr.size)) || (ind >= arr.size)
      raise ArgumentError, "index out of range: #{ind}"
    else
      v = if val.is_a?(::String)
            val.dup
          else
            val.to_s
          end
      self.keyspace[key.to_s][ind] = v
    end
  end
end

#ltrim(key, start_index, stop_index) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 594

def ltrim(key, start_index, stop_index)
  arr = self.lrange(key, start_index, stop_index)
  if 0 == arr.size
    self.del(key)
  else
    self.keyspace[key.to_s] = arr
  end
  true
end

#mget(*keys) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 263

def mget(*keys)
  keys.map{|k| self.get(k)}
end

#move(key, db) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/roc/store/transient_store.rb', line 120

def move(key, db)
  raise NotImplementedError
end

#mset(*pairs) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 267

def mset(*pairs)
  i=0
  while i < pairs.size
    self.set(pairs[i], pairs[i+1])
    i+=2
  end
  true
end

#msetnx(*pairs) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 285

def msetnx(*pairs)
  i=0
  any_exist = false
  while i < pairs.size
    if self.exists(pairs[i])
      any_exist = true
      break
    end
  end
  if !any_exist
    i=0
    while i < pairs.size
      self.set(pairs[i], pairs[i+1])
      i+=2
    end
    true
  else
    false
  end
end

#multi ⇒ Object

Transactions



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# File 'lib/roc/store/transient_store.rb', line 1226

def multi
  if @multi_mode
    raise "multi calls can't be nested"
  else
    @multi_mode = true
    @multi_calls = []
    if block_given?
      begin
        yield
      rescue Exception => e
        self.discard
        raise e
      end
      self.exec
    end
  end
end

#persist(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 124

def persist(key)
  if self.exists(key) && (md = self.mdspace[key.to_s]) && md.has_key?(:expire_at)
    md.delete(:expire_at)
    true
  else
    false
  end
end

#randomkey ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 133

def randomkey
  ks = self.keys
  ks[Kernel.rand(ks.size)]
end

#rename(key, newkey) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 138

def rename(key, newkey)
  if key.to_s == newkey.to_s
    raise ArgumentError, "keys are the same"
  elsif self.exists(key)
    self.keyspace[newkey.to_s] = self.keyspace.delete(key.to_s)
    true
  else
    raise ArgumentError, "no such key: #{key}"
  end
end

#renamenx(key, newkey) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 149

def renamenx(key, newkey)
  if key.to_s == newkey.to_s
    raise ArgumentError, "keys are the same"
  elsif self.exists(key)
    if self.exists(newkey)
      false
    else
      self.keyspace[newkey.to_s] = self.keyspace.delete(key.to_s)
      true
    end
  else
    raise ArgumentError, "no such key: #{key}"
  end
end

#rpop(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 492

def rpop(key)
  with_type(key, 'list') do          
    if !self.exists(key)
      nil
    else
      val = self.keyspace[key.to_s].pop  
      if 0 == self.llen(key)
        self.del(key)
      end
      val
    end
  end
end

#rpoplpush(source_key, dest_key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 604

def rpoplpush(source_key, dest_key)
  if self.exists(source_key)
    val = self.rpop(source_key)
    self.lpush(dest_key, val)
    val
  else
    nil
  end          
end

#rpush(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 446

def rpush(key, val)
  with_type(key, 'list') do
    if !self.exists(key)
      self.keyspace[key.to_s] = []
    end
    v = if val.is_a?(::String)
          val.dup
        else
          val.to_s
        end
    self.keyspace[key.to_s] << v
    self.keyspace[key.to_s].size
  end
end

#rpushx(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 461

def rpushx(key, val)
  if self.exists(key)
    self.rpush(key, val)
  else
    0
  end
end

#sadd(key, val) ⇒ Object

Set



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# File 'lib/roc/store/transient_store.rb', line 654

def sadd(key, val)
  with_type(key, 'set') do
    v = val.to_s
    if !self.exists(key)
      self.keyspace[key.to_s] = {}
    end
    if self.keyspace[key.to_s].has_key?(v)
      false
    else
      self.keyspace[key.to_s][v] = true
      true
    end
  end
end

#scard(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 669

def scard(key)
  with_type(key, 'set') do
    expunge_if_expired(key)  
    val = self.keyspace[key.to_s]
    if val.nil?
      0
    else
      val.size
    end
  end
end

#sdiff(*keys) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/roc/store/transient_store.rb', line 781

def sdiff(*keys)
  raise ArgumentError, 'sinter needs at least one key' unless keys.size > 0
  diff = self.smembers(keys.shift)
  while k = keys.shift
    diff = diff - self.smembers(k)
  end
  diff
end

#sdiffstore(key, *other_keys) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 802

def sdiffstore(key, *other_keys)
  vals = self.sdiff(*other_keys)
  vals.each{|v| self.sadd(key, v)}
  vals.size
end

#set(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 243

def set(key, val)
  with_type(key, 'string') do
    expunge_if_expired(key)
    v = if val.is_a?(::String)
          val.dup
        else
          val.to_s
        end
    self.keyspace[key.to_s] = v
    self.persist(key)
    true
  end
end

#setbit(key, index, value) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/roc/store/transient_store.rb', line 332

def setbit(key, index, value)
  raise ArgumentError, 'setbit takes a non-negative index' unless index > 0
  raise ArgumentError, 'setbit takes a 1 or 0 for the value' unless((0 == value) || (1 == value))

  bitstring = self.get(key).unpack('B*')[0]
  current_val = 0
  if index < bitstring.length
    current_val = if RUBY_VERSION.match(/^1\.8/)
                    bitstring[index].chr.to_i
                  else
                    bitstring[index].to_i
                  end
    bitstring[index] = value.to_s
  else
    bitstring << ('0' * (index - bitstring.length))
    bitstring << value.to_s
  end
  self.set(key, [bitstring].pack('B*'))
  current_val
end

#setnx(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 276

def setnx(key, val)
  if self.exists(key)
    false
  else
    self.set(key, val)
    true
  end
end

#setrange(key, start_index, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 368

def setrange(key, start_index, val)
  with_type(key, 'string') do
    expunge_if_expired(key)
    if start_index < 1
      raise "index out of range: #{start_index}"          
    end
    length = self.strlen(key)
    padding_length = start_index - length
    v = val.to_s
    if padding_length > 0            
      #self.keyspace[key.to_s][length, padding_length + v.length] = ("\u0000" * padding_length) + v
      self.keyspace[key.to_s][length, padding_length + v.length] = ("\000" * padding_length) + v
    else
      self.keyspace[key.to_s][start_index, v.length] = v
    end
    self.strlen(key)
  end
end

#shared? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/roc/store/transient_store.rb', line 24

def shared?
  !@name.nil?
end

#sinter(*keys) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/roc/store/transient_store.rb', line 772

def sinter(*keys)
  raise ArgumentError, 'sinter needs at least one key' unless keys.size > 0
  inter = self.smembers(keys.shift)
  while k = keys.shift
    inter = inter & self.smembers(k)
  end
  inter
end

#sinterstore(key, *other_keys) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 796

def sinterstore(key, *other_keys)
  vals = self.sinter(*other_keys)
  vals.each{|v| self.sadd(key, v)}
  vals.size
end

#sismember(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 710

def sismember(key, val)
  with_type(key, 'set') do
    expunge_if_expired(key)  
    hsh = self.keyspace[key.to_s]
    if hsh.nil?
     false
    else
      hsh.has_key?(val.to_s)
    end
  end
end

#smembers(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 681

def smembers(key)
  with_type(key, 'set') do
    expunge_if_expired(key)  
    val = self.keyspace[key.to_s]
    if val.nil?
     []
    else
      val.keys
    end
  end
end

#smove(source_key, dest_key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 750

def smove(source_key, dest_key, val)
  if self.exists(source_key)
    if self.srem(source_key, val)
      self.sadd(dest_key, val)
      true
    else
      false
    end
  else
    false
  end
end

#sort(key, *args) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 164

def sort(key, *args)
  opts = parse_sort_args(args)

  raise ":by not yet supported" if opts.has_key?(:by)
  raise ":get not yet supported" if opts.has_key?(:get)

  limit = opts[:limit]
  order = (opts[:order] || '').split(' ')
  store = opts[:store]
  
  md = self.mdspace[key.to_s]

  vals = if md.nil?
           []
         elsif 'list' == md[:type]
           self.lrange(key, 0, -1)
         elsif 'set' == md[:type]
           self.smembers(key)
         elsif 'zset' == md[:type]
           self.zrange(key, 0, -1)
         else
           raise TypeError, 'list, set or zset required'
         end
  
  sorter = if order.include?('alpha')
             if order.include?('desc')
               lambda{|a, b| b <=> a}
             else
               lambda{|a, b| a <=> b}
             end
           elsif order.include?('desc')
             lambda{|a, b| b.to_f <=> a.to_f}
           else
             lambda{|a, b| a.to_f <=> b.to_f}
           end

  vals.sort!{|a, b| sorter.call(a, b)}
  
  if limit
    vals = vals[*limit]
  end

  if store
    with_type(store, 'list') do
      self.keyspace[store.to_s] = vals
    end
  end

  vals
end

#spop(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 693

def spop(key)
  with_type(key, 'set') do
    expunge_if_expired(key)  
    hsh = self.keyspace[key.to_s]
    if hsh.nil?
     nil
    else
      val = hsh.keys.sort{Kernel.rand}[0]
      self.keyspace[key.to_s].delete(val)
      if 0 == self.keyspace[key.to_s].size
        self.del(key)              
      end
      val
    end
  end
end

#srandmember(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 738

def srandmember(key)
  with_type(key, 'set') do
    expunge_if_expired(key)  
    hsh = self.keyspace[key.to_s]
    if hsh.nil?
     nil
    else
      hsh.keys.sort{Kernel.rand}[0]
    end
  end
end

#srem(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 722

def srem(key, val)
  with_type(key, 'set') do
    expunge_if_expired(key)  
    hsh = self.keyspace[key.to_s]
    if hsh.nil?
     false
    else
      ret = !!hsh.delete(val.to_s)
      if 0 == hsh.size
        self.del(key)              
      end
      ret
    end
  end
end

#strlen(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 387

def strlen(key)
  val = self.get(key)
  if val.nil?
    0
  else
    if "".respond_to?(:bytesize)
      val.bytesize
    else
      val.length
    end
  end
end

#sunion(*keys) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/roc/store/transient_store.rb', line 763

def sunion(*keys)
  raise ArgumentError, 'sunion needs at least one key' unless keys.size > 0
  union = self.smembers(keys.shift)
  while k = keys.shift
    union = union | self.smembers(k)
  end
  union
end

#sunionstore(key, *other_keys) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 790

def sunionstore(key, *other_keys)
  vals = self.sunion(*other_keys)
  vals.each{|v| self.sadd(key, v)}
  vals.size
end

#ttl(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 215

def ttl(key)
  val = -1
  if self.exists(key)
    if (md = self.mdspace[key.to_s]) && (ea = md[:expire_at])
      val = ea - ::Time.now.to_i
    end
  end
  val
end

#type(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 225

def type(key)
  if md = self.mdspace[key.to_s]
    md[:type].dup
  else
    'none'
  end
end

#unwatch ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1279

def unwatch
  ## nothing, we are non concurrent
  true
end

#watch(*keys) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1271

def watch(*keys)
  if @multi_mode
    raise "watch inside multi not allowed"
  end
  ## nothing, we are non concurrent
  true
end

#zadd(key, score, val) ⇒ Object

Sorted Sets



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# File 'lib/roc/store/transient_store.rb', line 810

def zadd(key, score, val)
  with_type(key, 'zset') do
    s = if score.is_a?(Numeric)
          score
        elsif score.is_a?(::String)
          (score.index('.') ? score.to_f : score.to_i)
        else
          raise ArgumentError, "score is not numeric"
        end
    if !self.exists(key)
      self.keyspace[key.to_s] = {:map => {}, :list => []}
    end
    ret = true
    v = val.to_s
    if self.keyspace[key.to_s][:map].has_key?(v)
      ret = false
    end
    self.keyspace[key.to_s][:map][v] = s
    self.resort(key)
    ret
  end
end

#zcard(key) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 833

def zcard(key)
  with_type(key, 'zset') do
    expunge_if_expired(key)  
    val = self.keyspace[key.to_s]
    if val.nil?
      0
    else
      val[:list].size
    end
  end
end

#zcount(key, min, max) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 963

def zcount(key, min, max)
  self.zrangebyscore(key, min, max).size
end

#zincrby(key, by, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1005

def zincrby(key, by, val)
  score = self.zscore(key, val) || '0'
  new_score = (score.index('.') ? score.to_f : score.to_i) + by
  self.zadd(key, new_score, val)
  new_score.to_s
end

#zinterstore(key, *args) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/roc/store/transient_store.rb', line 1090

def zinterstore(key, *args)
  other_keys, opts = parse_zop_args(args)

  raise ArgumentError, 'zinterstore needs at least one key' unless other_keys.size > 0
  with_type(key, 'zset') do
    sorted_sets = other_keys.map{|k| self.keyspace[k.to_s]}.compact
    i = sorted_sets.pop
    if i
      weight_a = (opts.has_key?(:weights) ? opts[:weights].pop : 1)
      while ss = sorted_sets.pop
        weight_b = (opts.has_key?(:weights) ? opts[:weights].pop : 1)
        i = self.ss_intersect(i, ss, weight_a, weight_b, (opts.has_key?(:aggregate) ? opts[:aggregate] : 'sum')) ##@@ weights and agg
        weight_a = 1
      end
    else
      i = {:map => {}, :list => []}
    end
    self.keyspace[key.to_s] = i
    i[:list].size
  end
end

#zrange(key, start_index, stop_index, opts = nil) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 845

def zrange(key, start_index, stop_index, opts=nil)
  opts = parse_zrange_arg(opts)

  with_type(key, 'zset') do
    expunge_if_expired(key)  
    val = self.keyspace[key.to_s]
    if val.nil? || (start_index >= val[:list].size) || ( (start_index < 0) && (stop_index < start_index) )
      []
    else
      ## emulate redis -- a neg start index before beginning meams the beginning
      if (start_index < 0) && (-start_index > val[:list].size)
        start_index = 0
      end
      if opts[:with_scores] || opts[:withscores]
        ret = []
        val[:list][start_index..stop_index].each do |v|
          ret << v
          ret << val[:map][v].to_s
        end
        ret
      else
        val[:list][start_index..stop_index] || [] ## never return nil
      end
    end
  end
end

#zrangebyscore(key, min, max, *opts) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 896

def zrangebyscore(key, min, max, *opts)
  opts = parse_zscore_args(opts)

  with_type(key, 'zset') do
    expunge_if_expired(key)  
    val = self.keyspace[key.to_s]
    if val.nil?
      []
    else
      parse = lambda {|v|
        if v.is_a?(::String)
          if v[0] == '('[0]                  
            [v[1..v.length-1].to_i, false]
          elsif '+inf' == v
            [1.0/0, true]
          elsif '-inf' == v
            [-1.0/0, true]
          else
            [v.to_i, true]
          end
        else
          [v.to_i, true]
        end
        }
      min_int, min_incl = *parse.call(min)
      max_int, max_incl = *parse.call(max)

      ret = []

      pass = lambda { |v, op, incl, test|
        v.send( op + (incl ? '=' : ''), test)
      }

      val[:list].each do |v|
        if pass.call(val[:map][v], '>', min_incl, min_int) && pass.call(val[:map][v], '<', max_incl, max_int)
          ret << v
          if opts[:with_scores] || opts[:withscores]
            ret << val[:map][v].to_s
          end
        end
      end
      if opts.has_key?(:limit)
        limit = if opts[:with_scores] || opts[:withscores]
                  opts[:limit].map{|x| x * 2}
                else
                  opts[:limit]
                end
        ret[limit[0], limit[1]]
      else
        ret
      end
    end
  end
end

#zrank(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 967

def zrank(key, val)
  with_type(key, 'zset') do
    expunge_if_expired(key)  
    hsh = self.keyspace[key.to_s]
    if hsh.nil?
     nil
    else
      hsh[:list].index(val.to_s)
    end
  end
end

#zrem(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1012

def zrem(key, val)
  with_type(key, 'zset') do
    expunge_if_expired(key)  
    hsh = self.keyspace[key.to_s]
    if hsh.nil?
     false
    else
      if hsh[:map].delete(val.to_s)
        self.resort(key)
        if 0 == hsh[:list].size
          self.del(key)
        end
        true
      else
        false
      end
    end
  end
end

#zremrangebyrank(key, start, stop) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1049

def zremrangebyrank(key, start, stop)
  vals = self.zrange(key, start, stop)
  if vals.size > 0
    hsh = self.keyspace[key.to_s]
    vals.each do |val|
      hsh[:map].delete(val)
    end
    self.resort(key)
    if 0 == hsh[:list].size
      self.del(key)
    end
    vals.size
  else
    0
  end        
end

#zremrangebyscore(key, min, max) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 1032

def zremrangebyscore(key, min, max)
  vals = self.zrangebyscore(key, min, max)
  if vals.size > 0
    hsh = self.keyspace[key.to_s]
    vals.each do |val|
      hsh[:map].delete(val)
    end
    self.resort(key)
    if 0 == hsh[:list].size
      self.del(key)
    end
    vals.size
  else
    0
  end
end

#zrevrange(key, start_index, stop_index, opts = nil) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 872

def zrevrange(key, start_index, stop_index, opts=nil)
  opts = parse_zrange_arg(opts)

  with_type(key, 'zset') do
    expunge_if_expired(key)  
    val = self.keyspace[key.to_s]
    if val.nil? || (start_index >= val[:list].size) || ( (start_index < 0) && (stop_index < start_index) )
      []
    else
      list = val[:list].reverse
      if opts[:with_scores] || opts[:withscores]
        ret = []
        list[start_index..stop_index].each do |v|
          ret << v
          ret << val[:map][v].to_s
        end
        ret
      else
        list[start_index..stop_index]
      end
    end
  end
end

#zrevrangebyscore(key, max, min, *opts) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 951

def zrevrangebyscore(key, max, min, *opts)
  opts = parse_zscore_args(opts)

  limit = opts.delete(:limit)
  ret = self.zrangebyscore(key, min, max, opts).reverse
  if limit
    ret[limit[0], limit[1]]
  else
    ret
  end
end

#zrevrank(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 979

def zrevrank(key, val)
  r = self.zrank(key, val)
  if r
    self.keyspace[key.to_s][:list].size - (r + 1)
  else
    nil
  end
end

#zscore(key, val) ⇒ Object 



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# File 'lib/roc/store/transient_store.rb', line 988

def zscore(key, val)
  with_type(key, 'zset') do
    expunge_if_expired(key)  
    hsh = self.keyspace[key.to_s]
    if hsh.nil?
     nil
    else
      v = hsh[:map][val.to_s]
      if v
        v.to_s
      else
        nil
      end
    end
  end
end

#zunionstore(key, *args) ⇒ Object

craziness here is to support both the Ruby Redis gem args style and the raw redis args styl

Raises:

  • (ArgumentError) 


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# File 'lib/roc/store/transient_store.rb', line 1067

def zunionstore(key, *args)
  other_keys, opts = parse_zop_args(args)

  raise ArgumentError, 'zunionstore needs at least one key' unless other_keys.size > 0
  raise ArgumentError, 'mismatch weights count' unless (!opts.has_key?(:weights) || (opts[:weights].size == other_keys.size))
  with_type(key, 'zset') do
    sorted_sets = other_keys.map{|k| self.keyspace[k.to_s]}.compact
    u = sorted_sets.pop
    if u
      weight_a = (opts.has_key?(:weights) ? opts[:weights].pop : 1)
      while ss = sorted_sets.pop
        weight_b = (opts.has_key?(:weights) ? opts[:weights].pop : 1)
        u = self.ss_union(u, ss, weight_a, weight_b, (opts.has_key?(:aggregate) ? opts[:aggregate] : 'sum')) ##@@ weights and agg
        weight_a = 1
      end
    else
      u = {:map => {}, :list => []}
    end
      self.keyspace[key.to_s] = u
    u[:list].size
  end
end