def execute():
if len(sys.argv) != 2:
sys.exit("no task IUI given")
iui = sys.argv[1]
try:
db = Database()
db.open()
task = Task(db, iui=iui)
if task.status != configuration.CREATED:
raise ValueError("task status is not '%s'" % configuration.CREATED)
task.status = configuration.EXECUTING
except ValueError, msg:
sys.exit(str(msg))
if task.status != configuration.CREATED:
raise ValueError("task status is not '%s'" % configuration.CREATED)
task.status = configuration.EXECUTING
except ValueError, msg:
sys.exit(str(msg))
finally:
db.close() # Close before daemonizing
daemonize(
stdout=os.path.join(configuration.TASK_DIR, "%s.out" % iui),
stderr=os.path.join(configuration.TASK_DIR, "%s.err" % iui),
)
db.open() # Open again after daemonizing
try:
task = Task(db, iui=iui)
try:
tool = configuration.TOOLS_LOOKUP[task.tool]
except KeyError:
raise ValueError("no such tool '%s'" % task.tool)
# The tool must save the pid of the process doing the heavy work.
tool(task)
task.cpu_time = 0.0
for who in (resource.RUSAGE_SELF, resource.RUSAGE_CHILDREN):
usage = resource.getrusage(who)
task.cpu_time += usage.ru_utime + usage.ru_stime
except Exception, msg:
task.data["error"] = "%s\n%s" % (task.data.get("error", ""), msg)
task._status = configuration.FAILED