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require 'concurrent/synchronization'
module Concurrent
# A simple utility class that executes a callable and returns and array of three elements:
# success - indicating if the callable has been executed without errors
# value - filled by the callable result if it has been executed without errors, nil otherwise
# reason - the error risen by the callable if it has been executed with errors, nil otherwise
class SafeTaskExecutor < Synchronization::LockableObject
def initialize(task, opts = {})
@task = task
@exception_class = opts.fetch(:rescue_exception, false) ? Exception : StandardError
super() # ensures visibility
end
# @return [Array]
def execute(*args)
synchronize do
success = false
value = reason = nil
begin
value = @task.call(*args)
success = true
rescue @exception_class => ex
reason = ex
success = false
end
[success, value, reason]
end
end
end
end
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