Class: Druid::DataSource
- Inherits:
-
Object
- Object
- Druid::DataSource
- Defined in:
- lib/druid/data_source.rb
Defined Under Namespace
Classes: Error
Instance Attribute Summary collapse
-
#dimensions ⇒ Object
readonly
Returns the value of attribute dimensions.
-
#metrics ⇒ Object
readonly
Returns the value of attribute metrics.
-
#name ⇒ Object
readonly
Returns the value of attribute name.
-
#uri ⇒ Object
readonly
Returns the value of attribute uri.
Instance Method Summary collapse
-
#initialize(name, uri) ⇒ DataSource
constructor
A new instance of DataSource.
- #metadata ⇒ Object
- #metadata!(opts = {}) ⇒ Object
- #post(query) ⇒ Object
Constructor Details
#initialize(name, uri) ⇒ DataSource
Returns a new instance of DataSource.
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# File 'lib/druid/data_source.rb', line 9 def initialize(name, uri) @name = name.split('/').last uri = uri.sample if uri.is_a?(Array) if uri.is_a?(String) @uri = URI(uri) else @uri = uri end end |
Instance Attribute Details
#dimensions ⇒ Object (readonly)
Returns the value of attribute dimensions.
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# File 'lib/druid/data_source.rb', line 7 def dimensions @dimensions end |
#metrics ⇒ Object (readonly)
Returns the value of attribute metrics.
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# File 'lib/druid/data_source.rb', line 7 def metrics @metrics end |
#name ⇒ Object (readonly)
Returns the value of attribute name.
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# File 'lib/druid/data_source.rb', line 7 def name @name end |
#uri ⇒ Object (readonly)
Returns the value of attribute uri.
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# File 'lib/druid/data_source.rb', line 7 def uri @uri end |
Instance Method Details
#metadata ⇒ Object
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# File 'lib/druid/data_source.rb', line 19 def @metadata ||= end |
#metadata!(opts = {}) ⇒ Object
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# File 'lib/druid/data_source.rb', line 23 def (opts = {}) = "#{@uri.path}datasources/#{name}" if opts[:interval] from, to = opts[:interval] from = from.respond_to?(:iso8601) ? from.iso8601 : ISO8601::DateTime.new(from).to_s to = to.respond_to?(:iso8601) ? to.iso8601 : ISO8601::DateTime.new(to).to_s += "?interval=#{from}/#{to}" end req = Net::HTTP::Get.new() response = Net::HTTP.new(uri.host, uri.port).start do |http| http.open_timeout = 10 # if druid is down fail fast http.read_timeout = nil # we wait until druid is finished http.request(req) end if response.code != '200' raise "Request failed: #{response.code}: #{response.body}" end MultiJson.load(response.body) end |
#post(query) ⇒ Object
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# File 'lib/druid/data_source.rb', line 56 def post(query) query = query.query if query.is_a?(Druid::Query::Builder) query = Query.new(MultiJson.load(query)) if query.is_a?(String) query.dataSource = name req = Net::HTTP::Post.new(uri.path, { 'Content-Type' => 'application/json' }) req.body = query.to_json response = Net::HTTP.new(uri.host, uri.port).start do |http| http.open_timeout = 10 # if druid is down fail fast http.read_timeout = nil # we wait until druid is finished http.request(req) end if response.code != '200' # ignore GroupBy cache issues and try again without cached results if query.context.useCache != false && response.code == "500" && response.body =~ /Cannot have a null result!/ query.context.useCache = false return self.post(query) end raise Error.new(response) end MultiJson.load(response.body) end |