Class: Mu::Xtractr::Views
- Inherits:
-
Object
- Object
- Mu::Xtractr::Views
- Defined in:
- lib/mu/xtractr/views.rb,
lib/mu/xtractr/test/tc_views.rb
Overview
tutorial on how Map/Reduce works.
Defined Under Namespace
Class Method Summary collapse
-
.count(xtractr, field, url, opts = {}) ⇒ Object
:nodoc:.
-
.sum(xtractr, kfield, vfield, url, opts = {}) ⇒ Object
:nodoc:.
Class Method Details
.count(xtractr, field, url, opts = {}) ⇒ Object
:nodoc:
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# File 'lib/mu/xtractr/views.rb', line 140 def self.count xtractr, field, url, opts={} # :nodoc: field = Field.new(xtractr, field) if field.is_a? String name = field.name.gsub /^(pkt|flow)\./, '' _opts = opts.dup _opts[:r] = <<-EOS ({ map: function(_pf) { _pf.values("#{name}", function(_value) { if (_value) { if (typeof(_value) === 'string') { if (_value.length > 1024) { _value = _value.slice(0,1024); } } emit(_value, 1); } }); }, reduce: function(_key, _values) { return sum(_values); } }) EOS result = xtractr.json url, _opts result['rows'].map do |row| Views::Count.new(xtractr, field, row['key'], row['value']) end.sort { |a, b| b.count <=> a.count } end |
.sum(xtractr, kfield, vfield, url, opts = {}) ⇒ Object
:nodoc:
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# File 'lib/mu/xtractr/views.rb', line 169 def self.sum xtractr, kfield, vfield, url, opts={} # :nodoc: kfield = Field.new(xtractr, kfield) if kfield.is_a? String vfield = Field.new(xtractr, vfield) if vfield.is_a? String kname = kfield.name.gsub /^(pkt|flow)\./, '' vname = vfield.name.gsub /^(pkt|flow)\./, '' _opts = opts.dup _opts[:r] = <<-EOS ({ map: function(_pf) { var _key = _pf["#{kname}"]; if (_key) { if (typeof(_key) === 'string') { if (_key.length > 1024) { _key = _key.slice(0,1024); } } _pf.values("#{vname}", function(_val) { if (typeof(_val) === 'number') { emit(_key, _val); } }); } }, reduce: function(_key, _values) { return sum(_values); } }) EOS result = xtractr.json url, _opts result['rows'].map do |row| Views::Sum.new(xtractr, kfield, row['key'], row['value']) end.sort { |a, b| b.sum <=> a.sum } end |