Plugin Helper: Event Emitter

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The event_emitter plugin helper introduces the router method to the plugin.
Here is an example:
require 'fluent/plugin/output'
​
module Fluent::Plugin
  class RelabelOutput < Output
    Fluent::Plugin.register_output('relabel', self)
    helpers :event_emitter
​
    def multi_workers_ready?
      true
    end
​
    def process(tag, es)
      router.emit_stream(tag, es)
    end
  end
end
Methods
router
This method returns a Fluent::EventRouter instance.
Code example:
# emit event
router.emit(tag, time, record)
​
# emit event stream
router.emit_stream(tag, es)
​
# emit error event
begin
  # do something
rescue => error
  # Route event to @ERROR label or
  # log error message when @ERROR label is not defined in configuration
  router.emit_error_event(tag, time, record, error)
end
Plugins using event_emitter
All input plugins
All filter plugins
​out_exec​
​out_relabel​
​out_copy​
​out_roundrobin​
If this article is incorrect or outdated, or omits critical information, please let us know. Fluentd is an open-source project under Cloud Native Computing Foundation (CNCF). All components are available under the Apache 2 License.

Plugin Helper: Compat Parameters

Plugin Helper: Event Loop

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Methods

router

Plugins using event_emitter

Methods

`router`

Plugins using `event_emitter`