Module: Hydra::Derivatives::Processors::ShellBasedProcessor::ClassMethods
- Defined in:
- lib/hydra/derivatives/processors/shell_based_processor.rb
Instance Method Summary collapse
- #all_eof?(files) ⇒ Boolean
- #execute(command) ⇒ Object
- #execute_with_timeout(timeout, command, context) ⇒ Object
- #execute_without_timeout(command, context) ⇒ Object
Instance Method Details
#all_eof?(files) ⇒ Boolean
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# File 'lib/hydra/derivatives/processors/shell_based_processor.rb', line 95 def all_eof?(files) files.find { |f| !f.eof }.nil? end |
#execute(command) ⇒ Object
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# File 'lib/hydra/derivatives/processors/shell_based_processor.rb', line 42 def execute(command) context = {} if timeout execute_with_timeout(timeout, command, context) else execute_without_timeout(command, context) end end |
#execute_with_timeout(timeout, command, context) ⇒ Object
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# File 'lib/hydra/derivatives/processors/shell_based_processor.rb', line 51 def execute_with_timeout(timeout, command, context) Timeout.timeout(timeout) do execute_without_timeout(command, context) end rescue Timeout::Error pid = context[:pid] Process.kill("KILL", pid) raise Hydra::Derivatives::TimeoutError, "Unable to execute command \"#{command}\"\nThe command took longer than #{timeout} seconds to execute" end |
#execute_without_timeout(command, context) ⇒ Object
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# File 'lib/hydra/derivatives/processors/shell_based_processor.rb', line 61 def execute_without_timeout(command, context) err_str = '' stdin, stdout, stderr, wait_thr = popen3(command) context[:pid] = wait_thr[:pid] stdin.close stdout.close files = [stderr] until all_eof?(files) ready = IO.select(files, nil, nil, 60) next unless ready readable = ready[0] readable.each do |f| fileno = f.fileno begin data = f.read_nonblock(BLOCK_SIZE) case fileno when stderr.fileno err_str << data end rescue EOFError Rails.logger "Caught an eof error in ShellBasedProcessor" # No big deal. end end end exit_status = wait_thr.value raise "Unable to execute command \"#{command}\". Exit code: #{exit_status}\nError message: #{err_str}" unless exit_status.success? end |