def _run_command(self, job, environ):
start_time = time.time()
slug = slugify(job.id)
output_writer = CommandOutputWriter(
stdout_path=os.path.join(self._jobs_io_log_dir,
"{}.stdout".format(slug)),
stderr_path=os.path.join(self._jobs_io_log_dir,
"{}.stderr".format(slug)))
io_log_gen = IOLogRecordGenerator()
log = os.path.join(self._jobs_io_log_dir, "{}.record.gz".format(slug))
with gzip.open(log, mode='wb') as gzip_stream, io.TextIOWrapper(
gzip_stream, encoding='UTF-8') as record_stream:
writer = IOLogRecordWriter(record_stream)
io_log_gen.on_new_record.connect(writer.write_record)
delegate = extcmd.Chain([
self._job_runner_ui_delegate, io_log_gen,
self._command_io_delegate, output_writer
])
ecmd = extcmd.ExternalCommandWithDelegate(delegate)
return_code = self.execute_job(job, environ, ecmd, self._stdin)
io_log_gen.on_new_record.disconnect(writer.write_record)
if return_code == 0:
outcome = IJobResult.OUTCOME_PASS
elif return_code < 0:
outcome = IJobResult.OUTCOME_CRASH
else:
outcome = IJobResult.OUTCOME_FAIL
return JobResultBuilder(outcome=outcome,
return_code=return_code,
io_log_filename=log,
execution_duration=time.time() - start_time)
def _prepare_io_handling(self, job, config):
ui_io_delegate = self._command_io_delegate
# NOTE: deprecated
# If there is no UI delegate specified create a simple
# delegate that logs all output to the console
if ui_io_delegate is None:
ui_io_delegate = FallbackCommandOutputPrinter(job.id)
# Compute a shared base filename for all logging activity associated
# with this job (aka: the slug)
slug = slugify(job.id)
# Create a delegate that writes all IO to disk
output_writer = CommandOutputWriter(
stdout_path=os.path.join(self._jobs_io_log_dir,
"{}.stdout".format(slug)),
stderr_path=os.path.join(self._jobs_io_log_dir,
"{}.stderr".format(slug)))
# Create a delegate for converting regular IO to IOLogRecords.
# It takes no arguments as all the interesting stuff is added as a
# signal listener.
io_log_gen = IOLogRecordGenerator()
# FIXME: this description is probably inaccurate and definitely doesn't
# take self._job_runner_ui_delegate into account.
#
# Create the delegate for routing IO
#
# Split the stream of data into three parts (each part is expressed as
# an element of extcmd.Chain()).
#
# Send the first copy of the data through bytes->text decoder and
# then to the UI delegate. This could be something provided by the
# higher level caller or the default FallbackCommandOutputPrinter.
#
# Send the second copy of the data to the IOLogRecordGenerator instance
# that converts raw bytes into neat IOLogRecord objects. This generator
# has a on_new_record signal that can be used to do stuff when a new
# record is generated.
#
# Send the third copy to the output writer that writes everything to
# disk.
delegate = extcmd.Chain([
self._job_runner_ui_delegate, ui_io_delegate, io_log_gen,
output_writer
])
logger.debug(_("job[%s] extcmd delegate: %r"), job.id, delegate)
# Attach listeners to io_log_gen (the IOLogRecordGenerator instance)
# One listener appends each record to an array
return delegate, io_log_gen
def test_chain(self):
obj = extcmd.Chain([Dummy()])
self.assertEqual(repr(obj),
"<Chain [<SafeDelegate wrapping <Dummy>>]>")
