Class: Cohere::Transcribe::State::OutputSetLock

Inherits:
Object
  • Object
show all
Defined in:
lib/cohere/transcribe/state/locking.rb

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(target, handle, key) ⇒ OutputSetLock

Returns a new instance of OutputSetLock.



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# File 'lib/cohere/transcribe/state/locking.rb', line 74

def initialize(target, handle, key)
  @target = target
  @handle = handle
  @key = key
  @released = false
end

Class Attribute Details

.active ⇒ Object (readonly)

Returns the value of attribute active.



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# File 'lib/cohere/transcribe/state/locking.rb', line 24

def active
  @active
end

.guard ⇒ Object (readonly)

Returns the value of attribute guard.



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# File 'lib/cohere/transcribe/state/locking.rb', line 24

def guard
  @guard
end

Instance Attribute Details

#target ⇒ Object (readonly)

Returns the value of attribute target.



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# File 'lib/cohere/transcribe/state/locking.rb', line 72

def target
  @target
end

Class Method Details

.acquire(target, blocking: false, operation_hook: nil) ⇒ Object 



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# File 'lib/cohere/transcribe/state/locking.rb', line 26

def acquire(target, blocking: false, operation_hook: nil)
  guard.synchronize do
    handle = nil
    acquired = false
    key = target.path.to_s
    if active.key?(key)
      raise TranscriptionRuntimeError,
            "Another transcription job owns output set #{target.identity}"
    end

    handle = State.open_lock_file(target.path)
    operation = File::LOCK_EX
    operation |= File::LOCK_NB unless blocking
    unless handle.flock(operation)
      handle.close
      raise TranscriptionRuntimeError,
            "Another transcription process owns output set #{target.identity} (lock #{target.path})"
    end
    operation_hook&.call(:after_flock, target)
    State.verify_lock_identity!(
      target.path,
      handle,
      message: "Output lock changed while acquiring #{target.identity}"
    )

    lock = new(target, handle, key)
    active[key] = lock
    acquired = true
    lock
  rescue Errno::EWOULDBLOCK, Errno::EAGAIN
    handle&.close
    raise TranscriptionRuntimeError,
          "Another transcription process owns output set #{target.identity} (lock #{target.path})"
  rescue Interrupt, SystemExit, StandardError
    handle&.close
    raise
  ensure
    handle.close if handle && !acquired && !handle.closed?
  end
end

.release_all ⇒ Object 



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# File 'lib/cohere/transcribe/state/locking.rb', line 67

def release_all
  guard.synchronize { active.values.dup }.each(&:release)
end

Instance Method Details

#release ⇒ Object 



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# File 'lib/cohere/transcribe/state/locking.rb', line 81

def release
  self.class.guard.synchronize do
    return if @released

    begin
      @handle.flock(File::LOCK_UN)
    ensure
      @handle.close
      @released = true
      self.class.active.delete(@key)
    end
  end
  nil
end

#released? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cohere/transcribe/state/locking.rb', line 96

def released?
  @released
end