Class: Ruote::MongoDbStorage

Inherits:
Object
  • Object
show all
Includes:
MonitorMixin, StorageBase
Defined in:
lib/ruote-mongodb/mongodb_storage.rb

Constant Summary collapse

@@collection_prefix = 
"ruote_"
@@encoded_dollar_sign = 
"~#~"

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ MongoDbStorage

Returns a new instance of MongoDbStorage.



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# File 'lib/ruote-mongodb/mongodb_storage.rb', line 12

def initialize(options={})
  super()
  db_config = {"host"=>"localhost", "port"=>27017, "database"=>"Ruote"}
  options = options.dup
  if environment = options.delete(:environment)
    all_db_config=
      File.open(options.delete(:config) || 'config/database.yml','r') do |f|
        YAML.load(f)
      end

    raise "no configuration for environment: #{environment}" unless env_config = all_db_config[environment]
    db_config.merge!(env_config)
  end
  #args take precedent over config
  db_config.merge! options.delete(:connection) if options[:connection]

  @db = Mongo::Connection.new(db_config['host'], db_config['port']).
	db(db_config['database'])
  if db_config['username'] && db_config['password']
    @db.authenticate(db_config['username'], db_config['password'])
  end

  unless get('configurations','engine')
    put(options.merge('type'=>'configurations', '_id'=>'engine')) 
  end
end

Instance Method Details

#add_type(type) ⇒ Object 



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# File 'lib/ruote-mongodb/mongodb_storage.rb', line 143

def add_type(type)
  synchronize do
    get_collection(type).create_index("_id")
  end
end

#close_connection ⇒ Object 



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# File 'lib/ruote-mongodb/mongodb_storage.rb', line 39

def close_connection()
  @db.connection.close()
end

#delete(doc) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/ruote-mongodb/mongodb_storage.rb', line 83

def delete(doc)
  drev = doc['_rev']
  raise ArgumentError.new("can't delete doc without _rev") unless drev
  synchronize do
    raise "doc must have a type" unless doc['type']
    prev = get(doc['type'], doc['_id'])
    return true if prev.nil?
    doc['_rev'] ||= 0
    if prev['_rev'] == drev
      get_collection(doc['type']).remove("_id" => doc["_id"])
      nil
    else
      prev
    end
  end
end

#get(type, key) ⇒ Object 



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# File 'lib/ruote-mongodb/mongodb_storage.rb', line 75

def get(type, key)
  synchronize do
    doc = get_collection(type).find_one("_id" => key)
    from_mongo doc if doc
    doc
  end
end

#get_many(type, key = nil, opts = {}) ⇒ Object 



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# File 'lib/ruote-mongodb/mongodb_storage.rb', line 100

def get_many(type, key=nil, opts={})
  synchronize do
    return get_collection(type).count if opts[:count]
    criteria = {}
    find_opts = {}
    find_opts[:limit] = opts[:limit] if opts[:limit]
    find_opts[:skip] = opts[:skip] if opts[:skip]
    find_opts[:sort] = ["_id", opts[:descending] ? :descending : :ascending]
    if key
      id_criteria = Array(key).map do |k|
        case k.class.to_s
        when "String" then "!#{k}$"
        when "Regexp" then k.source
        else k.to_s
        end
      end
      criteria = {"_id" => /#{id_criteria.join "|"}/}
    end
    docs = get_collection(type).find(criteria, find_opts).to_a
    docs.each do |doc|
      from_mongo doc
    end
    docs
  end
end

#ids(type) ⇒ Object 



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# File 'lib/ruote-mongodb/mongodb_storage.rb', line 126

def ids(type)
  synchronize do
    result = get_collection(type).find({}, {:fields=>["_id"]}).map do |row|
      row["_id"].to_s
    end
    result.sort
  end
end

#purge! ⇒ Object 



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# File 'lib/ruote-mongodb/mongodb_storage.rb', line 135

def purge!
  synchronize do
    @db.collection_names.each do |name| 
      @db.drop_collection(name) if name =~ /^#{@@collection_prefix}/
    end
  end
end

#purge_type!(type) ⇒ Object 



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# File 'lib/ruote-mongodb/mongodb_storage.rb', line 149

def purge_type!(type)
  synchronize do
    @db.drop_collection(@@collection_prefix + type)
  end
end

#put(doc, opts = {}) ⇒ Object 



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# File 'lib/ruote-mongodb/mongodb_storage.rb', line 43

def put(doc, opts={})
  synchronize do
    raise "doc must have a type" unless doc['type']
    raise "doc must have an ID" unless doc['_id']
    pre = get(doc['type'], doc['_id'])

    if pre && pre['_rev'] != doc['_rev']
      return pre
    end

    if pre.nil? && doc['_rev']
      return true
    end

    doc = if opts[:update_rev]
            doc['_rev'] = pre ? pre['_rev'] : -1
            doc
          else
            doc.merge('_rev' => doc['_rev'] || -1)
          end

    doc['put_at'] = Ruote.now_to_utc_s
    doc['_rev'] = doc['_rev'] + 1

    encoded_doc = Rufus::Json.dup(doc)
    to_mongo encoded_doc
    get_collection(doc['type']).save(encoded_doc)

    nil
  end
end