Class: Fluent::ForestOutput
- Inherits:
-
MultiOutput
- Object
- MultiOutput
- Fluent::ForestOutput
- Defined in:
- lib/fluent/plugin/out_forest.rb
Instance Attribute Summary collapse
-
#outputs ⇒ Object
readonly
Returns the value of attribute outputs.
Instance Method Summary collapse
- #configure(conf) ⇒ Object
- #emit(tag, es, chain) ⇒ Object
- #parameter(tag, e, name = 'instance', arg = '') ⇒ Object
- #plant(tag) ⇒ Object
- #shutdown ⇒ Object
- #spec(tag) ⇒ Object
- #touch_recursive(e) ⇒ Object
Instance Attribute Details
#outputs ⇒ Object (readonly)
Returns the value of attribute outputs.
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# File 'lib/fluent/plugin/out_forest.rb', line 10 def outputs @outputs end |
Instance Method Details
#configure(conf) ⇒ Object
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# File 'lib/fluent/plugin/out_forest.rb', line 12 def configure(conf) super if @remove_prefix @removed_prefix_string = @remove_prefix + '.' @removed_length = @removed_prefix_string.length end if @add_prefix @added_prefix_string = @add_prefix + '.' end @mapping = {} # tag => output @outputs = [] @mutex = Mutex.new @template = nil @parameter = nil @cases = [] conf.elements.each do |element| # read and throw away to supress unread configuration warning touch_recursive(element) element.each do |k,v| unless v.match(/\$\{tag_parts\[\d\.\.\.?\d\]\}/).nil? or v.match(/__TAG_PARTS\[\d\.\.\.?\d\]__/).nil? raise Fluent::ConfigError, "${tag_parts[n]} and __TAG_PARTS[n]__ placeholder does not support range specify at #{k} #{v}" end end case element.name when 'template' @template = element when 'case' matcher = Fluent::GlobMatchPattern.new(element.arg) @cases.push([matcher, element]) end end self end |
#emit(tag, es, chain) ⇒ Object
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# File 'lib/fluent/plugin/out_forest.rb', line 141 def emit(tag, es, chain) if @remove_prefix and ( (tag.start_with?(@removed_prefix_string) and tag.length > @removed_length) or tag == @remove_prefix) tag = tag[@removed_length..-1] end if @add_prefix tag = if tag.length > 0 @added_prefix_string + tag else @add_prefix end end output = @mapping[tag] unless output output = plant(tag) end if output output.emit(tag, es, chain) else chain.next end end |
#parameter(tag, e, name = 'instance', arg = '') ⇒ Object
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# File 'lib/fluent/plugin/out_forest.rb', line 69 def parameter(tag, e, name = 'instance', arg = '') tag_parts = {} tag.split('.').each_with_index do |t, idx| tag_parts["${tag_parts[#{idx}]}"] = t tag_parts["__TAG_PARTS[#{idx}]__"] = t end escaped_tag = tag.gsub('.', @escape_tag_separator) pairs = {} e.each do |k,v| v = v.gsub(/(__TAG_PARTS\[[0-9]+\]__|\${tag_parts\[[0-9]+\]})/) do $log.warn "out_forest: missing placeholder. tag:#{tag} placeholder:#{$1} conf:#{k} #{v}" unless tag_parts.include?($1) tag_parts[$1] end v = v.gsub('__ESCAPED_TAG__', escaped_tag).gsub('${escaped_tag}', escaped_tag) pairs[k] = v.gsub('__TAG__', tag).gsub('${tag}', tag).gsub('__HOSTNAME__', @hostname).gsub('${hostname}', @hostname) end elements = e.elements.map do |child| parameter(tag, child, child.name, child.arg) end Fluent::Config::Element.new(name, arg, pairs, elements) end |
#plant(tag) ⇒ Object
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# File 'lib/fluent/plugin/out_forest.rb', line 113 def plant(tag) output = nil begin @mutex.synchronize { output = @mapping[tag] unless output output = Fluent::Plugin.new_output(@subtype) output.configure(spec(tag)) output.start @mapping[tag] = output @outputs.push(output) end } $log.info "out_forest plants new output: #{@subtype} for tag '#{tag}'" rescue Fluent::ConfigError => e $log.error "failed to configure sub output #{@subtype}: #{e.}" $log.error e.backtrace.join("\n") $log.error "Cannot output messages with tag '#{tag}'" output = nil rescue StandardError => e $log.error "failed to configure/start sub output #{@subtype}: #{e.}" $log.error e.backtrace.join("\n") $log.error "Cannot output messages with tag '#{tag}'" output = nil end output end |
#shutdown ⇒ Object
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# File 'lib/fluent/plugin/out_forest.rb', line 62 def shutdown super @mapping.values.each do |output| output.shutdown end end |
#spec(tag) ⇒ Object
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# File 'lib/fluent/plugin/out_forest.rb', line 91 def spec(tag) conf = Fluent::Config::Element.new('instance', '', {}, []) conf = parameter(tag, @template) + conf if @template # a + b -> b.merge(a) (see: fluentd/lib/fluent/config.rb) @cases.each do |m,e| if m.match(tag) matched_case = parameter(tag, e) matched_case.elements.each { |case_child| unless case_child.arg.empty? conf.elements.delete_if { |conf_child| conf_child.name == case_child.name && conf_child.arg == case_child.arg } end } conf = matched_case + conf break end end conf end |
#touch_recursive(e) ⇒ Object
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# File 'lib/fluent/plugin/out_forest.rb', line 53 def touch_recursive(e) e.keys.each do |k| e[k] end e.elements.each do |child| touch_recursive(child) end end |