Class: Hasta::ExecutionContext

Inherits:
Object
  • Object
show all
Defined in:
lib/hasta/execution_context.rb

Overview

Executes each local EMR job in isolation

Defined Under Namespace

Classes: Subprocess

Instance Method Summary collapse

Constructor Details

#initialize(ruby_files = [], env = {}) ⇒ ExecutionContext

Returns a new instance of ExecutionContext.



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# File 'lib/hasta/execution_context.rb', line 52

def initialize(ruby_files = [], env = {})
  @sub_process = Subprocess.new(ruby_files, env)
end

Instance Method Details

#execute(source_file, data_source, data_sink) ⇒ Object 



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# File 'lib/hasta/execution_context.rb', line 56

def execute(source_file, data_source, data_sink)
  sub_process.start(source_file) do |sub_process|
    [
      stream_input(data_source, sub_process.stdin),
      stream_output(sub_process.stdout) { |line| data_sink << line },
      stream_output(sub_process.stderr) { |line| Hasta.logger.error line },
    ].each(&:join)
  end

  data_sink.close
end