Class: Zermelo::Backends::InfluxDB

Inherits:
Object
  • Object
show all
Includes:
Zermelo::Backend
Defined in:
lib/zermelo/backends/influxdb.rb

Instance Method Summary collapse

Methods included from Zermelo::Backend

#add, #clear, #delete, #escape_key_name, #get, #index_keys, #lock, #move, #purge, #safe_value, #set, #unescape_key_name

Instance Method Details

#abort_transaction ⇒ Object 



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# File 'lib/zermelo/backends/influxdb.rb', line 111

def abort_transaction
  return false unless @in_transaction
  @in_transaction = false
  @changes = []
end

#begin_transaction ⇒ Object 



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# File 'lib/zermelo/backends/influxdb.rb', line 98

def begin_transaction
  return false if @in_transaction
  @in_transaction = true
  @changes = []
end

#commit_transaction ⇒ Object 



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# File 'lib/zermelo/backends/influxdb.rb', line 104

def commit_transaction
  return false unless @in_transaction
  apply_changes(@changes)
  @in_transaction = false
  @changes = []
end

#exists?(key) ⇒ Boolean

TODO get filter calling this instead of using same logic



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# File 'lib/zermelo/backends/influxdb.rb', line 32

def exists?(key)
  return if key.id.nil?
  class_key = attr_key.klass.send(:class_key)
  Zermelo.influxdb.query("SELECT id FROM /#{class_key}\\/.*/ LIMIT 1").size > 0
end

#filter(ids_key, associated_class, callback_target_class = nil, callback_target_id = nil, callbacks = nil, sort_order = nil) ⇒ Object 



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# File 'lib/zermelo/backends/influxdb.rb', line 24

def filter(ids_key, associated_class, callback_target_class = nil,
           callback_target_id = nil, callbacks = nil, sort_order = nil)

  Zermelo::Filters::InfluxDB.new(self, ids_key, associated_class,
    callback_target_class, callback_target_id, callbacks, sort_order)
end

#get_multiple(*attr_keys) ⇒ Object

nb: does lots of queries, should batch, but ensuring single operations are correct for now



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# File 'lib/zermelo/backends/influxdb.rb', line 40

def get_multiple(*attr_keys)
  attr_keys.inject({}) do |memo, attr_key|
    class_key = attr_key.klass.send(:class_key)
    begin
    records = Zermelo.influxdb.query("SELECT #{attr_key.name} FROM " +
      "\"#{class_key}/#{attr_key.id}\" LIMIT 1")["#{class_key}/#{attr_key.id}"]
    rescue ::InfluxDB::Error => ide
      raise unless
        /^Field #{attr_key.name} doesn't exist in series #{class_key}\/#{attr_key.id}$/ === ide.message

      records = []
    end
    value = (records && !records.empty?) ? records.first[attr_key.name.to_s] : nil

    memo[class_key] ||= {}
    memo[class_key][attr_key.id] ||= {}

    memo[class_key][attr_key.id][attr_key.name.to_s] = if value.nil?
      case attr_key.type
      when :list
        []
      when :hash
        {}
      when :set
        Set.new
      else nil
      end
    else
      case attr_key.type
      when :string
        value.to_s
      when :integer
        value.to_i
      when :float
        value.to_f
      when :timestamp
        Time.at(value.to_f)
      when :boolean
        case value
        when TrueClass
          true
        when FalseClass
          false
        when String
          'true'.eql?(value.downcase)
        else
          nil
        end
      when :list, :hash
        value
      when :set
        Set.new(value)
      end
    end
    memo
  end
end

#key_to_backend_key(key) ⇒ Object 



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# File 'lib/zermelo/backends/influxdb.rb', line 20

def key_to_backend_key(key)
  "TODO"
end