16 lines
315 B
Ruby
16 lines
315 B
Ruby
require 'red_storm'
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class WordCountBolt < RedStorm::SimpleBolt
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output_fields :word, :count
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on_init {@counts = Hash.new{|h, k| h[k] = 0}}
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# block declaration style using auto-emit (default)
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#
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on_receive do |tuple|
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word = tuple.getString(0)
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@counts[word] += 1
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[word, @counts[word]]
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end
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end
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