Class: Grafana::GraphiteDatasource

Inherits:
AbstractDatasource show all
Defined in:
lib/grafana/graphite_datasource.rb

Overview

Implements the interface to graphite datasources.

Instance Attribute Summary

Attributes inherited from AbstractDatasource

#model

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from AbstractDatasource

build_instance, #category, #id, inherited, #initialize, #name, #replace_variables, #type, #uid

Constructor Details

This class inherits a constructor from Grafana::AbstractDatasource

Class Method Details

.handles?(model) ⇒ Boolean

Returns:

  • (Boolean)

See Also:



7
8
9
10
 
# File 'lib/grafana/graphite_datasource.rb', line 7

def self.handles?(model)
  tmp = new(model)
  tmp.type == 'graphite'
end

Instance Method Details

#default_variable_format ⇒ Object

See Also:



40
41
42
 
# File 'lib/grafana/graphite_datasource.rb', line 40

def default_variable_format
    'glob'
end

#raw_query_from_panel_model(panel_query_target) ⇒ Object

See Also:



35
36
37
 
# File 'lib/grafana/graphite_datasource.rb', line 35

def raw_query_from_panel_model(panel_query_target)
  panel_query_target['target']
end

#request(query_description) ⇒ Object

:raw_query needs to contain a Graphite query as String

Raises:

See Also:



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
# File 'lib/grafana/graphite_datasource.rb', line 14

def request(query_description)
  raise MissingSqlQueryError if query_description[:raw_query].nil?

  request = {
    body: URI.encode_www_form('from': DateTime.strptime(query_description[:from], '%Q').strftime('%H:%M_%Y%m%d'),
                              'until': DateTime.strptime(query_description[:to], '%Q').strftime('%H:%M_%Y%m%d'),
                              'format': 'json',
                              'target': replace_variables(query_description[:raw_query], query_description[:variables])),
    content_type: 'application/x-www-form-urlencoded',
    request: Net::HTTP::Post
  }

  webrequest = query_description[:prepared_request]
  webrequest.relative_url = "/api/datasources/proxy/#{id}/render"
  webrequest.options.merge!(request)

  result = webrequest.execute(query_description[:timeout])
  preformat_response(result.body)
end