Module: Roma::Command::Definition::ClassMethods

Defined in:
lib/roma/command/command_definition.rb

Defined Under Namespace

Classes: CommandContext, CommandParams, StoredData

Instance Method Summary collapse

Instance Method Details

#def_command_with_key(cmd, forward = :one_line, &block) ⇒ Object

def_write_command_with_key



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# File 'lib/roma/command/command_definition.rb', line 168

def def_command_with_key(cmd, forward = :one_line, &block)
  define_method "ev_#{cmd}" do |s|
    return send_data("CLIENT_ERROR does not find key\r\n") if s.length < 2
    begin
      params = CommandParams.new
      params.key, params.hash_name = s[1].split("\e")
      params.hash_name ||= @defhash
      params.digest = Digest::SHA1.hexdigest(params.key).hex % @rttable.hbits
      params.vn = @rttable.get_vnode_id(params.digest)
      params.nodes = @rttable.search_nodes_for_write(params.vn)
      if params.nodes[0] != @nid
        if forward == :one_line
          return forward_and_one_line_receive(params.nodes[0], s)
        elsif  forward == :multi_line
          return forward_and_multi_line_receive(params.nodes[0], s)
        end
      end
      stored = StoredData.new
      unless @storages[params.hash_name]
        return send_data("SERVER_ERROR #{params.hash_name} does not exists.\r\n")
      end

      stored.vn, stored.last, stored.clk, stored.expt, stored.value =
        @storages[params.hash_name].get_raw(params.vn, params.key, params.digest)
      stored = nil if stored.vn == nil || Time.now.to_i > stored.expt
      ctx = CommandContext.new(s, params, stored)
      instance_exec(ctx, &block)
    rescue ClientErrorException => e
      send_data("CLIENT_ERROR #{e.message}\r\n")
    rescue ServerErrorException => e
      send_data("SERVER_ERROR #{e.message}\r\n")
    rescue LocalJumpError => e
      @log.warn("#{e} #{$@}")
      e.exit_value
    end
  end
end

#def_command_with_key_value(cmd, idx_of_val_len, forward = :one_line, &block) ⇒ Object

def_read_command_with_key_value



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# File 'lib/roma/command/command_definition.rb', line 323

def def_command_with_key_value(cmd, idx_of_val_len, forward = :one_line, &block)
  define_method "ev_#{cmd}" do |s|
    return send_data("CLIENT_ERROR does not find key\r\n") if s.length < 2
    begin
      params = CommandParams.new
      params.key, params.hash_name = s[1].split("\e")
      params.hash_name ||= @defhash
      params.digest = Digest::SHA1.hexdigest(params.key).hex % @rttable.hbits
      params.vn = @rttable.get_vnode_id(params.digest)
      params.nodes = @rttable.search_nodes_for_write(params.vn)
      params.value = read_bytes(s[idx_of_val_len].to_i)
      read_bytes(2)
      if params.nodes[0] != @nid
        if forward == :one_line
          return forward_and_one_line_receive(params.nodes[0], s, params.value)
        elsif  forward == :multi_line
          return forward_and_multi_line_receive(params.nodes[0], s, params.value)
        end
      end
      stored = StoredData.new
      unless @storages[params.hash_name]
        return send_data("SERVER_ERROR #{params.hash_name} does not exists.\r\n")
      end

      stored.vn, stored.last, stored.clk, stored.expt, stored.value =
        @storages[params.hash_name].get_raw(params.vn, params.key, params.digest)
      stored = nil if stored.vn == nil || Time.now.to_i > stored.expt
      ctx = CommandContext.new(s, params, stored)
      instance_exec(ctx, &block)
    rescue ClientErrorException => e
      send_data("CLIENT_ERROR #{e.message}\r\n")
    rescue ServerErrorException => e
      send_data("SERVER_ERROR #{e.message}\r\n")
    rescue LocalJumpError => e
      @log.warn("#{e} #{$@}")
      e.exit_value
    end
  end
end

#def_command_with_relay(cmd, &block) ⇒ Object 



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# File 'lib/roma/command/command_definition.rb', line 15

def def_command_with_relay(cmd, &block)
  # check a duplicated command definition in a same scope
  if public_method_defined? "ev_#{cmd}".to_sym
    raise "ev_#{cmd} already defined."
  end

  # define a command receiver
  define_method "ev_#{cmd}" do |s|
    begin
      res = {}
      res[@stats.ap_str] = instance_exec(s, &block)
      # command relay
      res.merge! broadcast_cmd("r#{cmd} #{s[1..-1].join(' ')}\r\n")
      send_data("#{res}\r\n")
    rescue ClientErrorException => e
      send_data("CLIENT_ERROR #{e.message}\r\n")
    rescue ServerErrorException => e
      send_data("SERVER_ERROR #{e.message}\r\n")
    rescue LocalJumpError => e
      @log.warn("#{e} #{$@}")
      e.exit_value
    end
  end

  # define a relaid command receiver
  define_method "ev_r#{cmd}" do |s|
    begin
      send_data("#{instance_exec(s, &block)}\r\n")
    rescue ClientErrorException => e
      send_data("CLIENT_ERROR #{e.message}\r\n")
    rescue ServerErrorException => e
      send_data("SERVER_ERROR #{e.message}\r\n")
    rescue LocalJumpError => e
      @log.warn("#{e} #{$@}")
      e.exit_value
    end
  end
end

#def_read_command_with_key(cmd, forward = :one_line, &block) ⇒ Object 



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# File 'lib/roma/command/command_definition.rb', line 58

def def_read_command_with_key(cmd, forward = :one_line, &block)
  define_method "ev_#{cmd}" do |s|
    return send_data("CLIENT_ERROR does not find key\r\n") if s.length < 2
    begin
      params = CommandParams.new
      params.key, params.hash_name = s[1].split("\e")
      params.hash_name ||= @defhash
      params.digest = Digest::SHA1.hexdigest(params.key).hex % @rttable.hbits
      params.vn = @rttable.get_vnode_id(params.digest)
      params.nodes = @rttable.search_nodes_for_write(params.vn)
      if params.nodes[0] != @nid
        if forward == :one_line
          return forward_and_one_line_receive(params.nodes[0], s)
        elsif  forward == :multi_line
          return forward_and_multi_line_receive(params.nodes[0], s)
        end
      end
      stored = StoredData.new
      unless @storages[params.hash_name]
        return send_data("SERVER_ERROR #{params.hash_name} does not exists.\r\n")
      end

      stored.vn, stored.last, stored.clk, stored.expt, stored.value =
        @storages[params.hash_name].get_raw(params.vn, params.key, params.digest)
      stored = nil if stored.vn == nil || Time.now.to_i > stored.expt
      ctx = CommandContext.new(s, params, stored)
      instance_exec(ctx, &block)
      @stats.read_count += 1
    rescue ClientErrorException => e
      send_data("CLIENT_ERROR #{e.message}\r\n")
    rescue ServerErrorException => e
      send_data("SERVER_ERROR #{e.message}\r\n")
    rescue LocalJumpError => e
      @log.warn("#{e} #{$@}")
      e.exit_value
    end
  end
end

#def_read_command_with_key_value(cmd, idx_of_val_len, forward = :one_line, &block) ⇒ Object

def_write_command_with_key_value



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# File 'lib/roma/command/command_definition.rb', line 281

def def_read_command_with_key_value(cmd, idx_of_val_len, forward = :one_line, &block)
  define_method "ev_#{cmd}" do |s|
    return send_data("CLIENT_ERROR does not find key\r\n") if s.length < 2
    begin
      params = CommandParams.new
      params.key, params.hash_name = s[1].split("\e")
      params.hash_name ||= @defhash
      params.digest = Digest::SHA1.hexdigest(params.key).hex % @rttable.hbits
      params.vn = @rttable.get_vnode_id(params.digest)
      params.nodes = @rttable.search_nodes_for_write(params.vn)
      params.value = read_bytes(s[idx_of_val_len].to_i)
      read_bytes(2)
      if params.nodes[0] != @nid
        if forward == :one_line
          return forward_and_one_line_receive(params.nodes[0], s, params.value)
        elsif  forward == :multi_line
          return forward_and_multi_line_receive(params.nodes[0], s, params.value)
        end
      end
      stored = StoredData.new
      unless @storages[params.hash_name]
        return send_data("SERVER_ERROR #{params.hash_name} does not exists.\r\n")
      end

      stored.vn, stored.last, stored.clk, stored.expt, stored.value =
        @storages[params.hash_name].get_raw(params.vn, params.key, params.digest)
      stored = nil if stored.vn == nil || Time.now.to_i > stored.expt
      ctx = CommandContext.new(s, params, stored)

      instance_exec(ctx, &block)
      @stats.read_count += 1
    rescue ClientErrorException => e
      send_data("CLIENT_ERROR #{e.message}\r\n")
    rescue ServerErrorException => e
      send_data("SERVER_ERROR #{e.message}\r\n")
    rescue LocalJumpError => e
      @log.warn("#{e} #{$@}")
      e.exit_value
    end
  end
end

#def_write_command_with_key(cmd, forward = :one_line, &block) ⇒ Object

def_read_command_with_key



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# File 'lib/roma/command/command_definition.rb', line 97

def def_write_command_with_key(cmd, forward = :one_line, &block)
  define_method "ev_#{cmd}" do |s|
    return send_data("CLIENT_ERROR does not find key\r\n") if s.length < 2
    begin
      params = CommandParams.new
      params.key, params.hash_name = s[1].split("\e")
      params.hash_name ||= @defhash
      params.digest = Digest::SHA1.hexdigest(params.key).hex % @rttable.hbits
      params.vn = @rttable.get_vnode_id(params.digest)
      params.nodes = @rttable.search_nodes_for_write(params.vn)
      if params.nodes[0] != @nid
        if forward == :one_line
          return forward_and_one_line_receive(params.nodes[0], s)
        elsif  forward == :multi_line
          return forward_and_multi_line_receive(params.nodes[0], s)
        end
      end
      stored = StoredData.new
      unless @storages[params.hash_name]
        return send_data("SERVER_ERROR #{params.hash_name} does not exists.\r\n")
      end

      stored.vn, stored.last, stored.clk, stored.expt, stored.value =
        @storages[params.hash_name].get_raw(params.vn, params.key, params.digest)
      stored = nil if stored.vn == nil || Time.now.to_i > stored.expt
      if stored && @stats.wb_command_map.key?("#{cmd}__prev".to_sym)
        Roma::WriteBehindProcess::push(params.hash_name,
                                       @stats.wb_command_map["#{cmd}__prev".to_sym],
                                       params.key, stored.value)
      end
      ctx = CommandContext.new(s, params, stored)

      ret = instance_exec(ctx, &block)
      if ret.instance_of? Array
        flg, expt, value, count, msg = ret
        ret = @storages[ctx.params.hash_name].set(ctx.params.vn, 
                                                  ctx.params.key,
                                                  ctx.params.digest,
                                                  expt,
                                                  value)
        if count == :write
          @stats.write_count += 1
        elsif count == :delete
          @stats.delete_count += 1
        end

        if ret
          if @stats.wb_command_map.key?(cmd.to_sym)
            Roma::WriteBehindProcess::push(ctx.params.hash_name,
                                           @stats.wb_command_map[cmd.to_sym],
                                           ctx.params.key, ret[4])
          end
          redundant(ctx.params.nodes[1..-1], ctx.params.hash_name,
                    ctx.params.key, ctx.params.digest, ret[2],
                    expt, ret[4])
          send_data("#{msg}\r\n")
        else
          send_data("NOT_#{msg}\r\n")
        end
      end
    rescue ClientErrorException => e
      send_data("CLIENT_ERROR #{e.message}\r\n")
    rescue ServerErrorException => e
      send_data("SERVER_ERROR #{e.message}\r\n")
    rescue LocalJumpError => e
      @log.warn("#{e} #{$@}")
      e.exit_value
    end
  end
end

#def_write_command_with_key_value(cmd, idx_of_val_len, forward = :one_line, &block) ⇒ Object

def_command_with_key



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# File 'lib/roma/command/command_definition.rb', line 206

def def_write_command_with_key_value(cmd, idx_of_val_len, forward = :one_line, &block)
  define_method "ev_#{cmd}" do |s|
    return send_data("CLIENT_ERROR does not find key\r\n") if s.length < 2
    begin
      params = CommandParams.new
      params.key, params.hash_name = s[1].split("\e")
      params.hash_name ||= @defhash
      params.digest = Digest::SHA1.hexdigest(params.key).hex % @rttable.hbits
      params.vn = @rttable.get_vnode_id(params.digest)
      params.nodes = @rttable.search_nodes_for_write(params.vn)
      params.value = read_bytes(s[idx_of_val_len].to_i)
      read_bytes(2)
      if params.nodes[0] != @nid
        if forward == :one_line
          return forward_and_one_line_receive(params.nodes[0], s, params.value)
        elsif  forward == :multi_line
          return forward_and_multi_line_receive(params.nodes[0], s, params.value)
        end
      end
      stored = StoredData.new
      unless @storages[params.hash_name]
        return send_data("SERVER_ERROR #{params.hash_name} does not exists.\r\n")
      end

      stored.vn, stored.last, stored.clk, stored.expt, stored.value =
        @storages[params.hash_name].get_raw(params.vn, params.key, params.digest)
      stored = nil if stored.vn == nil || Time.now.to_i > stored.expt

      if stored && @stats.wb_command_map.key?("#{cmd}__prev".to_sym)
        Roma::WriteBehindProcess::push(params.hash_name,
                                       @stats.wb_command_map["#{cmd}__prev".to_sym],
                                       params.key, stored.value)
      end

      ctx = CommandContext.new(s, params, stored)
      
      ret = instance_exec(ctx, &block)
      if ret.instance_of? Array
        flg, expt, value, count, msg = ret
        ret = @storages[ctx.params.hash_name].set(ctx.params.vn, 
                                                  ctx.params.key,
                                                  ctx.params.digest,
                                                  expt,
                                                  value)
        if count == :write
          @stats.write_count += 1
        elsif count == :delete
          @stats.delete_count += 1
        end

        if ret
          if @stats.wb_command_map.key?(cmd.to_sym)
            Roma::WriteBehindProcess::push(ctx.params.hash_name,
                                           @stats.wb_command_map[cmd.to_sym],
                                           ctx.params.key, ret[4])
          end
          redundant(ctx.params.nodes[1..-1], ctx.params.hash_name, 
                    ctx.params.key, ctx.params.digest, ret[2], 
                    expt, ret[4])
          send_data("#{msg}\r\n")
        else
          send_data("NOT_#{msg}\r\n")
        end
      end
    rescue ClientErrorException => e
      send_data("CLIENT_ERROR #{e.message}\r\n")
    rescue ServerErrorException => e
      send_data("SERVER_ERROR #{e.message}\r\n")
    rescue LocalJumpError => e
      @log.warn("#{e} #{$@}")
      e.exit_value
    end
  end
end