Class: Fluent::GrepCounterOutput
- Inherits:
-
Output
- Object
- Output
- Fluent::GrepCounterOutput
- Defined in:
- lib/fluent/plugin/out_grepcounter.rb
Constant Summary collapse
- REGEXP_MAX_NUM =
20
Instance Attribute Summary collapse
-
#counts ⇒ Object
Returns the value of attribute counts.
-
#last_checked ⇒ Object
Returns the value of attribute last_checked.
-
#matches ⇒ Object
Returns the value of attribute matches.
-
#saved_at ⇒ Object
Returns the value of attribute saved_at.
-
#saved_duration ⇒ Object
Returns the value of attribute saved_duration.
Instance Method Summary collapse
- #aggregate_proc(tag_proc) ⇒ Object
- #configure(conf) ⇒ Object
-
#emit(tag, es, chain) ⇒ Object
Called when new line comes.
-
#flush_emit(step) ⇒ Object
This method is the real one to emit.
- #generate_output(count, matches, tag = nil) ⇒ Object
-
#initialize ⇒ GrepCounterOutput
constructor
A new instance of GrepCounterOutput.
-
#load_status(file_path, count_interval) ⇒ Object
Load internal status from a file.
- #match(regexp, string) ⇒ Object
- #replace_invalid_byte(string) ⇒ Object
-
#save_status(file_path) ⇒ Object
Store internal status into a file.
- #shutdown ⇒ Object
- #start ⇒ Object
- #tag_proc ⇒ Object
-
#watcher ⇒ Object
thread callback.
Constructor Details
#initialize ⇒ GrepCounterOutput
Returns a new instance of GrepCounterOutput.
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 12 def initialize super require 'pathname' end |
Instance Attribute Details
#counts ⇒ Object
Returns the value of attribute counts.
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 42 def counts @counts end |
#last_checked ⇒ Object
Returns the value of attribute last_checked.
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 46 def last_checked @last_checked end |
#matches ⇒ Object
Returns the value of attribute matches.
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 43 def matches @matches end |
#saved_at ⇒ Object
Returns the value of attribute saved_at.
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 45 def saved_at @saved_at end |
#saved_duration ⇒ Object
Returns the value of attribute saved_duration.
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 44 def saved_duration @saved_duration end |
Instance Method Details
#aggregate_proc(tag_proc) ⇒ Object
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 250 def aggregate_proc(tag_proc) case @aggregate when 'all' Proc.new {|tag| :all } when 'in_tag' Proc.new {|tag| tag } when 'out_tag' Proc.new {|tag| tag_proc.call(tag) } end end |
#configure(conf) ⇒ Object
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 48 def configure(conf) super if @input_key @regexp = Regexp.compile(@regexp) if @regexp @exclude = Regexp.compile(@exclude) if @exclude end @regexps = {} (1..REGEXP_MAX_NUM).each do |i| next unless conf["regexp#{i}"] key, regexp = conf["regexp#{i}"].split(/ /, 2) raise Fluent::ConfigError, "regexp#{i} does not contain 2 parameters" unless regexp raise Fluent::ConfigError, "regexp#{i} contains a duplicated key, #{key}" if @regexps[key] @regexps[key] = Regexp.compile(regexp) end @excludes = {} (1..REGEXP_MAX_NUM).each do |i| next unless conf["exclude#{i}"] key, exclude = conf["exclude#{i}"].split(/ /, 2) raise Fluent::ConfigError, "exclude#{i} does not contain 2 parameters" unless exclude raise Fluent::ConfigError, "exclude#{i} contains a duplicated key, #{key}" if @excludes[key] @excludes[key] = Regexp.compile(exclude) end if @input_key and (!@regexps.empty? or !@excludes.empty?) raise Fluent::ConfigError, "Classic style `input_key`, and new style `regexpN`, `excludeN` can not be used together" end # to support obsolete options @tag ||= @output_tag @delimiter ||= @output_with_joined_delimiter # to support obsolete `threshold` and `comparator` options if @threshold.nil? and @less_than.nil? and @less_equal.nil? and @greater_than.nil? and @greater_equal.nil? @threshold = 1 end unless %w[>= <=].include?(@comparator) raise Fluent::ConfigError, "grepcounter: comparator allows >=, <=" end if @threshold case @comparator when '>=' @greater_equal = @threshold else @less_equal = @threshold end end if @tag.nil? and @add_tag_prefix.nil? and @remove_tag_prefix.nil? and @add_tag_suffix.nil? and @remove_tag_suffix.nil? and @remove_tag_slice.nil? @add_tag_prefix = 'count' # not ConfigError to support lower version compatibility end @tag_proc = tag_proc case @aggregate when 'all' raise Fluent::ConfigError, "grepcounter: `tag` must be specified with aggregate all" if @tag.nil? when 'tag' # obsolete @aggregate = 'in_tag' when 'in_tag' when 'out_tag' else raise Fluent::ConfigError, "grepcounter: aggregate allows all/in_tag/out_tag" end @aggregate_proc = aggregate_proc(@tag_proc) if @store_file f = Pathname.new(@store_file) if (f.exist? && !f.writable_real?) || (!f.exist? && !f.parent.writable_real?) raise Fluent::ConfigError, "#{@store_file} is not writable" end end @matches = {} @counts = {} @mutex = Mutex.new end |
#emit(tag, es, chain) ⇒ Object
Called when new line comes. This method actually does not emit
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 141 def emit(tag, es, chain) count = 0; matches = [] # filter out and insert es.each do |time,record| catch(:break_loop) do if key = @input_key value = record[key].to_s throw :break_loop if @regexp and !match(@regexp, value) throw :break_loop if @exclude and match(@exclude, value) matches << value # old style stores as an array of values else @regexps.each do |key, regexp| throw :break_loop unless match(regexp, record[key].to_s) end @excludes.each do |key, exclude| throw :break_loop if match(exclude, record[key].to_s) end matches << record # new style stores as an array of hashes, but how to utilize it? end count += 1 end end aggregate_key = @aggregate_proc.call(tag) # thread safe merge @counts[aggregate_key] ||= 0 @matches[aggregate_key] ||= [] @mutex.synchronize do @counts[aggregate_key] += count @matches[aggregate_key] += matches end chain.next rescue => e log.warn "grepcounter: #{e.class} #{e.} #{e.backtrace.first}" end |
#flush_emit(step) ⇒ Object
This method is the real one to emit
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 197 def flush_emit(step) time = Fluent::Engine.now flushed_counts, flushed_matches, @counts, @matches = @counts, @matches, {}, {} case @aggregate when 'all' count = flushed_counts[:all] matches = flushed_matches[:all] output = generate_output(count, matches) Fluent::Engine.emit(@tag, time, output) if output when 'out_tag' flushed_counts.keys.each do |out_tag| count = flushed_counts[out_tag] matches = flushed_matches[out_tag] output = generate_output(count, matches) if output Fluent::Engine.emit(out_tag, time, output) end end else # in_tag flushed_counts.keys.each do |tag| count = flushed_counts[tag] matches = flushed_matches[tag] output = generate_output(count, matches, tag) if output out_tag = @tag_proc.call(tag) Fluent::Engine.emit(out_tag, time, output) end end end end |
#generate_output(count, matches, tag = nil) ⇒ Object
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 229 def generate_output(count, matches, tag = nil) return nil if count.nil? return nil if count == 0 # ignore 0 because standby nodes receive no message usually return nil if @less_than and @less_than <= count return nil if @less_equal and @less_equal < count return nil if @greater_than and count <= @greater_than return nil if @greater_equal and count < @greater_equal output = {} output['count'] = count if @input_key output['message'] = @delimiter ? matches.join(@delimiter) : matches else # no 'message' field in the case of regexpN and excludeN end if tag output['input_tag'] = tag output['input_tag_last'] = tag.split('.').last end output end |
#load_status(file_path, count_interval) ⇒ Object
Load internal status from a file
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 339 def load_status(file_path, count_interval) return unless (f = Pathname.new(file_path)).exist? begin f.open('rb') do |f| stored = Marshal.load(f) if stored[:regexp] == @regexp and stored[:exclude] == @exclude and stored[:input_key] == @input_key if Fluent::Engine.now <= stored[:saved_at] + count_interval @counts = stored[:counts] @matches = stored[:matches] @saved_at = stored[:saved_at] @saved_duration = stored[:saved_duration] # skip the saved duration to continue counting @last_checked = Fluent::Engine.now - @saved_duration else log.warn "out_grepcounter: stored data is outdated. ignore stored data" end else log.warn "out_grepcounter: configuration param was changed. ignore stored data" end end rescue => e log.warn "out_grepcounter: Can't load store_file #{e.class} #{e.}" end end |
#match(regexp, string) ⇒ Object
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 294 def match(regexp, string) begin return regexp.match(string) rescue ArgumentError => e raise e unless e..index("invalid byte sequence in") == 0 string = replace_invalid_byte(string) retry end return true end |
#replace_invalid_byte(string) ⇒ Object
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 305 def replace_invalid_byte(string) = { invalid: :replace, undef: :replace, replace: '?' } original_encoding = string.encoding temporal_encoding = (original_encoding == Encoding::UTF_8 ? Encoding::UTF_16BE : Encoding::UTF_8) string.encode(temporal_encoding, original_encoding, ).encode(original_encoding) end |
#save_status(file_path) ⇒ Object
Store internal status into a file
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 315 def save_status(file_path) begin Pathname.new(file_path).open('wb') do |f| @saved_at = Fluent::Engine.now @saved_duration = @saved_at - @last_checked Marshal.dump({ :counts => @counts, :matches => @matches, :saved_at => @saved_at, :saved_duration => @saved_duration, :regexp => @regexp, :exclude => @exclude, :input_key => @input_key, }, f) end rescue => e log.warn "out_grepcounter: Can't write store_file #{e.class} #{e.}" end end |
#shutdown ⇒ Object
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 133 def shutdown super @watcher.terminate @watcher.join save_status(@store_file) if @store_file end |
#start ⇒ Object
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 127 def start super load_status(@store_file, @count_interval) if @store_file @watcher = Thread.new(&method(:watcher)) end |
#tag_proc ⇒ Object
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 261 def tag_proc tag_slice_proc = if @remove_tag_slice lindex, rindex = @remove_tag_slice.split('..', 2) if lindex.nil? or rindex.nil? or lindex !~ /^-?\d+$/ or rindex !~ /^-?\d+$/ raise Fluent::ConfigError, "out_grepcounter: remove_tag_slice must be formatted like [num]..[num]" end l, r = lindex.to_i, rindex.to_i Proc.new {|tag| ( = tag.split('.')[l..r]).nil? ? "" : .join('.') } else Proc.new {|tag| tag } end rstrip = Proc.new {|str, substr| str.chomp(substr) } lstrip = Proc.new {|str, substr| str.start_with?(substr) ? str[substr.size..-1] : str } tag_prefix = "#{rstrip.call(@add_tag_prefix, '.')}." if @add_tag_prefix tag_suffix = ".#{lstrip.call(@add_tag_suffix, '.')}" if @add_tag_suffix tag_prefix_match = "#{rstrip.call(@remove_tag_prefix, '.')}." if @remove_tag_prefix tag_suffix_match = ".#{lstrip.call(@remove_tag_suffix, '.')}" if @remove_tag_suffix tag_fixed = @tag if @tag if tag_prefix_match and tag_suffix_match Proc.new {|tag| "#{tag_prefix}#{rstrip.call(lstrip.call(tag_slice_proc.call(tag), tag_prefix_match), tag_suffix_match)}#{tag_suffix}" } elsif tag_prefix_match Proc.new {|tag| "#{tag_prefix}#{lstrip.call(tag_slice_proc.call(tag), tag_prefix_match)}#{tag_suffix}" } elsif tag_suffix_match Proc.new {|tag| "#{tag_prefix}#{rstrip.call(tag_slice_proc.call(tag), tag_suffix_match)}#{tag_suffix}" } elsif tag_prefix || @remove_tag_slice || tag_suffix Proc.new {|tag| "#{tag_prefix}#{tag_slice_proc.call(tag)}#{tag_suffix}" } else Proc.new {|tag| tag_fixed } end end |
#watcher ⇒ Object
thread callback
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# File 'lib/fluent/plugin/out_grepcounter.rb', line 179 def watcher # instance variable, and public accessable, for test @last_checked ||= Fluent::Engine.now while true sleep 0.5 begin if Fluent::Engine.now - @last_checked >= @count_interval now = Fluent::Engine.now flush_emit(now - @last_checked) @last_checked = now end rescue => e log.warn "grepcounter: #{e.class} #{e.} #{e.backtrace.first}" end end end |