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Contents
module Ably::Modules
# SafeYield provides the method safe_yield that will yield to the consumer
# who provided a block, however any exceptions will be caught, logged, and
# operation of the client library will continue.
#
# An exception in a callback provided by a developer should not break this client library
# and stop further execution of code.
#
# @note this Module requires that the method #logger is available
#
# @api private
module SafeYield
private
def safe_yield(block, *args)
block.call(*args)
rescue StandardError => e
message = "An exception in an external block was caught. #{e.class}: #{e.message}\n#{e.backtrace.join("\n")}"
safe_yield_log_error message
end
def safe_yield_log_error(message)
if defined?(:logger) && logger.respond_to?(:error)
return logger.error message
end
rescue StandardError
fallback_logger.error message
end
def fallback_logger
@fallback_logger ||= ::Logger.new(STDOUT).tap do |logger|
logger.formatter = lambda do |severity, datetime, progname, msg|
[
"#{datetime.strftime("%Y-%m-%d %H:%M:%S.%L")} #{::Logger::SEV_LABEL[severity]} #{msg}",
"Warning: SafeYield expects the method #logger to be defined in the class it is included in, the method was not found in #{self.class}"
].join("\n")
end
end
end
end
end
Version data entries
37 entries across 37 versions & 2 rubygems