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# frozen_string_literal: true
require 'thread'
require_relative 'logger'
module Listen
module Thread
class << self
# Creates a new thread with the given name.
# Any exceptions raised by the thread will be logged with the thread name and complete backtrace.
# rubocop:disable Style/MultilineBlockChain
def new(name, &block)
thread_name = "listen-#{name}"
caller_stack = caller
::Thread.new do
rescue_and_log(thread_name, caller_stack: caller_stack, &block)
end.tap do |thread|
thread.name = thread_name
end
end
# rubocop:enable Style/MultilineBlockChain
def rescue_and_log(method_name, *args, caller_stack: nil)
yield(*args)
rescue => exception
_log_exception(exception, method_name, caller_stack: caller_stack)
end
private
def _log_exception(exception, thread_name, caller_stack: nil)
complete_backtrace = if caller_stack
[*exception.backtrace, "--- Thread.new ---", *caller_stack]
else
exception.backtrace
end
message = "Exception rescued in #{thread_name}:\n#{_exception_with_causes(exception)}\n#{complete_backtrace * "\n"}"
Listen.logger.error(message)
end
def _exception_with_causes(exception)
result = +"#{exception.class}: #{exception}"
if exception.cause
result << "\n"
result << "--- Caused by: ---\n"
result << _exception_with_causes(exception.cause)
end
result
end
end
end
end
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