Class: Grok::Discovery
- Inherits:
-
Object
- Object
- Grok::Discovery
- Defined in:
- lib/grok/pure/discovery.rb
Instance Attribute Summary collapse
-
#logger ⇒ Object
Returns the value of attribute logger.
Instance Method Summary collapse
-
#discover(text) ⇒ Object
def initialize.
-
#initialize(grok) ⇒ Discovery
constructor
A new instance of Discovery.
Constructor Details
#initialize(grok) ⇒ Discovery
Returns a new instance of Discovery.
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# File 'lib/grok/pure/discovery.rb', line 8 def initialize(grok) @grok = grok @logger = Cabin::Channel.new @logger.subscribe(Logger.new(STDOUT)) @logger.level = :warn end |
Instance Attribute Details
#logger ⇒ Object
Returns the value of attribute logger.
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# File 'lib/grok/pure/discovery.rb', line 6 def logger @logger end |
Instance Method Details
#discover(text) ⇒ Object
def initialize
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# File 'lib/grok/pure/discovery.rb', line 15 def discover(text) text = text.clone # TODO(sissel): Sort patterns by complexity, most complex first. # - For each pattern, compile it in a grok by itself. # - Make a dictionary of { "name" => Grok } for each pattern # - Sort groks by complexity of the Grok#expanded_pattern groks = {} @grok.patterns.each do |name, expression| grok = Grok.new # Copy in the same grok patterns from the parent grok.patterns.merge!(@grok.patterns) grok.compile("%{#{name}}") groks[name] = grok end patterns = groks.sort { |a, b| compare(a, b) } done = false while !done done = true # will reset this if we are not done later. patterns.each do |name, grok| # Skip patterns that lack complexity (SPACE, NOTSPACE, DATA, etc) next if complexity(grok.) < 20 m = grok.match(text) # Skip non-matches next unless m part = text[m.start ... m.end] # Only include things that have word boundaries (not just words) next if part !~ /.\b./ # Skip over parts that appear to include %{pattern} already next if part =~ /%{[^}+]}/ acting = true text[m.start ... m.end] = "%{#{name}}" # Start the loop over again done = false break end end return text end |