Class: U3d::LogAnalyzer
- Inherits:
-
Object
- Object
- U3d::LogAnalyzer
- Defined in:
- lib/u3d/log_analyzer.rb
Overview
Analyzes log by filtering output along a set of rules rubocop:disable ClassLength, PerceivedComplexity, BlockNesting
Constant Summary collapse
- RULES_PATH =
File.('../../../config/log_rules.json', __FILE__)
- MEMORY_SIZE =
10
Instance Method Summary collapse
-
#initialize ⇒ LogAnalyzer
constructor
A new instance of LogAnalyzer.
- #load_rules ⇒ Object
- #parse_line(line) ⇒ Object
Constructor Details
#initialize ⇒ LogAnalyzer
Returns a new instance of LogAnalyzer.
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# File 'lib/u3d/log_analyzer.rb', line 33 def initialize @lines_memory = Array.new(MEMORY_SIZE) @active_phase = nil @active_rule = nil @context = {} @rule_lines_buffer = [] @generic_rules, @phases = load_rules end |
Instance Method Details
#load_rules ⇒ Object
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# File 'lib/u3d/log_analyzer.rb', line 42 def load_rules generic_rules = {} phases = {} data = JSON.parse(File.read(rules_path)) if data['GENERAL'] && data['GENERAL']['active'] data['GENERAL']['rules'].each do |rn, r| generic_rules[rn] = r if parse_rule(r) end end data.delete('GENERAL') data.each do |name, phase| # Phase parsing next unless phase['active'] next if phase['phase_start_pattern'].nil? phase['phase_start_pattern'] = Regexp.new phase['phase_start_pattern'] phase['phase_end_pattern'] = Regexp.new phase['phase_end_pattern'] if phase['phase_end_pattern'] phase.delete('comment') # Rules parsing temp_rules = {} unless phase['silent'] == true phase['rules'].each do |rn, r| temp_rules[rn] = r if parse_rule(r) end end phase['rules'] = temp_rules phases[name] = phase end return generic_rules, phases end |
#parse_line(line) ⇒ Object
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# File 'lib/u3d/log_analyzer.rb', line 74 def parse_line(line) # Insert new line and remove last stored line @lines_memory.push(line).shift # Check if phase is changing @phases.each do |name, phase| next if name == @active_phase next unless line =~ phase['phase_start_pattern'] finish_phase if @active_phase @active_phase = name UI.verbose("--- Beginning #{name} phase ---") break end apply_ruleset = lambda do |ruleset, header| # Apply the active rule if @active_rule && ruleset[@active_rule] rule = ruleset[@active_rule] pattern = rule['end_pattern'] # Is it the end of the rule? if line =~ pattern unless @rule_lines_buffer.empty? @rule_lines_buffer.each do |l| UI.send(rule['type'], "[#{header}] " + l) end end if rule['end_message'] != false if rule['end_message'] match = line.match(pattern) params = match.names.map(&:to_sym).zip(match.captures).to_h = inject(rule['end_message'], params: params) else = line.chomp end = "[#{header}] " + UI.send(rule['type'], ) end @active_rule = nil @context.clear @rule_lines_buffer.clear # It's not the end of the rules, should the line be stored? elsif rule['store_lines'] match = false if rule['ignore_lines'] rule['ignore_lines'].each do |pat| if line =~ pat match = true break end end end @rule_lines_buffer << line.chomp unless match end end # If there is no active rule, try to apply a new one if @active_rule.nil? ruleset.each do |rn, r| pattern = r['start_pattern'] next unless line =~ pattern @active_rule = rn if r['end_pattern'] match = line.match(pattern) @context = match.names.map(&:to_sym).zip(match.captures).to_h if r['fetch_line_at_index'] || r['fetch_first_line_not_matching'] if r['fetch_line_at_index'] fetched_line = @lines_memory.reverse[r['fetch_line_at_index']] else fetched_line = nil @lines_memory.reverse.each do |l| match = false r['fetch_first_line_not_matching'].each do |pat| next unless l =~ pat match = true break end next if match fetched_line = l break end end if fetched_line if r['fetched_line_pattern'] match = fetched_line.match(r['fetched_line_pattern']) @context.merge!(match.names.map(&:to_sym).zip(match.captures).to_h) end if r['fetched_line_message'] != false = if r['fetched_line_message'] inject(r['fetched_line_message']) else fetched_line.chomp end = "[#{header}] " + UI.send(r['type'], ) end end end if r['start_message'] != false = if r['start_message'] inject(r['start_message']) else line.chomp end = "[#{header}] " + UI.send(r['type'], ) end break end end end if @active_phase apply_ruleset.call(@phases[@active_phase]['rules'], @active_phase) finish_phase if @phases[@active_phase]['phase_end_pattern'] && @phases[@active_phase]['phase_end_pattern'] =~ line end apply_ruleset.call(@generic_rules, 'GENERAL') end |