Plugin Helper: Event Emitter

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The event_emitter plugin helper introduces the router method to the plugin.
Here is an example:
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require 'fluent/plugin/output'
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​
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module Fluent::Plugin
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  class RelabelOutput < Output
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    Fluent::Plugin.register_output('relabel', self)
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    helpers :event_emitter
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​
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    def multi_workers_ready?
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      true
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    end
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​
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    def process(tag, es)
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      router.emit_stream(tag, es)
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    end
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  end
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end
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Methods
router
This method returns a Fluent::EventRouter instance.
Code example:
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# emit event
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router.emit(tag, time, record)
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​
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# emit event stream
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router.emit_stream(tag, es)
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​
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# emit error event
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begin
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  # do something
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rescue => error
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  # Route event to @ERROR label or
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  # log error message when @ERROR label is not defined in configuration
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  router.emit_error_event(tag, time, record, error)
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end
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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

Last modified 4mo ago

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Contents

Methods

router

Plugins using event_emitter

Methods

`router`

Plugins using `event_emitter`