Class: BatchSpout

Inherits:
Object
  • Object
show all
Defined in:
lib/red_storm/proxy/batch_spout.rb

Overview

the BatchSpout class is a proxy to the real batch spout to avoid having to deal with all the Java artifacts when creating a spout.

The real batch spout class implementation must define these methods:

  • open(conf, context, collector)

  • emitBatch

  • getOutputFields

  • ack(batch_id)

and optionnaly:

  • close

Instance Method Summary collapse

Constructor Details

#initialize(base_class_path, real_spout_class_name) ⇒ BatchSpout

Returns a new instance of BatchSpout.



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# File 'lib/red_storm/proxy/batch_spout.rb', line 34

def initialize(base_class_path, real_spout_class_name)
  @real_spout = Object.module_eval(real_spout_class_name).new
rescue NameError
  require base_class_path
  @real_spout = Object.module_eval(real_spout_class_name).new
end

Instance Method Details

#ack(batch_id) ⇒ Object 



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# File 'lib/red_storm/proxy/batch_spout.rb', line 57

def ack(batch_id)
  @real_spout.ack(batch_id)
end

#close ⇒ Object 



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# File 'lib/red_storm/proxy/batch_spout.rb', line 47

def close
  @real_spout.close if @real_spout.respond_to?(:close)
end

#emitBatch(batch_id, collector) ⇒ Object 



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# File 'lib/red_storm/proxy/batch_spout.rb', line 52

def emitBatch(batch_id, collector)
  @real_spout.emit_batch(batch_id, collector)
end

#getComponentConfiguration ⇒ Object 



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# File 'lib/red_storm/proxy/batch_spout.rb', line 67

def getComponentConfiguration
  @real_spout.get_component_configuration
end

#getOutputFields ⇒ Object 



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# File 'lib/red_storm/proxy/batch_spout.rb', line 62

def getOutputFields
  @real_spout.get_output_fields()
end

#open(conf, context) ⇒ Object 



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# File 'lib/red_storm/proxy/batch_spout.rb', line 42

def open(conf, context)
  @real_spout.open(conf, context)
end