def __init__(self, master_uri):
cmd.Cmd.__init__(self)
self.master_uri = master_uri
self.local_continuation = SWContinuation(None, SimpleContext())
self.stmt_parser = SWStatementParser()
def __init__(self, master_uri):
cmd.Cmd.__init__(self)
self.master_uri = master_uri
self.local_continuation = SWContinuation(None, SimpleContext())
self.stmt_parser = SWStatementParser()
class SWInteractiveShell(cmd.Cmd):
def __init__(self, master_uri):
cmd.Cmd.__init__(self)
self.master_uri = master_uri
self.local_continuation = SWContinuation(None, SimpleContext())
self.stmt_parser = SWStatementParser()
def dereference_task_result(self, result_ref):
if isinstance(result_ref, SWDataValue):
return result_ref.value
else:
print result_ref
return "Too unusual to return!"
def submit_task_and_wait(self, task_stmt):
# 1. Update the local continuation with the current task_stmt.
self.local_continuation.task_stmt = task_stmt
# 2. POST the updated local continuation.
http = httplib2.Http()
master_data_uri = urlparse.urljoin(self.master_uri, "/data/")
(_, content) = http.request(master_data_uri, "POST", pickle.dumps(self.local_continuation))
continuation_uri, size_hint = simplejson.loads(content)
# 3. Submit a new task with the updated local continuation.
task_descriptor = {'dependencies': {'_cont' : SWURLReference([continuation_uri], size_hint)}, 'handler': 'swi', 'save_continuation': True}
master_task_submit_uri = urlparse.urljoin(self.master_uri, "/task/")
(_, content) = http.request(master_task_submit_uri, "POST", simplejson.dumps(task_descriptor, cls=SWReferenceJSONEncoder))
submit_result = simplejson.loads(content)
# 4. Block to get the final result.
expected_output_id = submit_result['outputs'][0]
notify_url = urlparse.urljoin(self.master_uri, "/global_data/%d/completion" % expected_output_id)
(_, result_content) = http.request(notify_url)
completion_result = simplejson.loads(result_content, object_hook=json_decode_object_hook)
if completion_result["exited"]:
raise Exception("Server exited")
# 5. Get updated local continuation. N.B. The originally-spawned task may have delegated, so we need to find the task from the actual producer of the expected output.
task_for_output_url = urlparse.urljoin(self.master_uri, "/global_data/%d/task" % expected_output_id)
(_, content) = http.request(task_for_output_url, "GET")
end_task_descriptor = simplejson.loads(content, object_hook=json_decode_object_hook)
saved_continuation_url = sw_to_external_url(end_task_descriptor['saved_continuation_uri'])
(_, content) = http.request(saved_continuation_url)
self.local_continuation = pickle.loads(content)
# 6. Dereference result.
return self.dereference_task_result(completion_result.refs[0])
def do_print(self, arg):
task_stmt = self.stmt_parser.parse("return %s;" % arg)
if self.local_continuation.task_stmt is None:
self.stmt_parser.parser.restart()
print "Syntax error"
return
result = self.submit_task_and_wait(task_stmt)
print result
return False
def do_exit(self, arg):
return True
def do_quit(self, arg):
return True
def do_EOF(self, arg):
print
return True
def default(self, line):
task_stmt = self.stmt_parser.parse(line)
if task_stmt is None:
self.stmt_parser.parser.restart()
print "Syntax error"
return
result = self.submit_task_and_wait(task_stmt)
print result
return False
class SWInteractiveShell(cmd.Cmd):
def __init__(self, master_uri):
cmd.Cmd.__init__(self)
self.master_uri = master_uri
self.local_continuation = SWContinuation(None, SimpleContext())
self.stmt_parser = SWStatementParser()
def dereference_task_result(self, result_ref):
if isinstance(result_ref, SWDataValue):
return result_ref.value
else:
print result_ref
return "Too unusual to return!"
def submit_task_and_wait(self, task_stmt):
# 1. Update the local continuation with the current task_stmt.
self.local_continuation.task_stmt = task_stmt
# 2. POST the updated local continuation.
http = httplib2.Http()
master_data_uri = urlparse.urljoin(self.master_uri, "/data/")
(_, content) = http.request(master_data_uri, "POST",
pickle.dumps(self.local_continuation))
continuation_uri, size_hint = simplejson.loads(content)
# 3. Submit a new task with the updated local continuation.
task_descriptor = {
'dependencies': {
'_cont': SWURLReference([continuation_uri], size_hint)
},
'handler': 'swi',
'save_continuation': True
}
master_task_submit_uri = urlparse.urljoin(self.master_uri, "/task/")
(_, content) = http.request(
master_task_submit_uri, "POST",
simplejson.dumps(task_descriptor, cls=SWReferenceJSONEncoder))
submit_result = simplejson.loads(content)
# 4. Block to get the final result.
expected_output_id = submit_result['outputs'][0]
notify_url = urlparse.urljoin(
self.master_uri, "/global_data/%d/completion" % expected_output_id)
(_, result_content) = http.request(notify_url)
completion_result = simplejson.loads(
result_content, object_hook=json_decode_object_hook)
if completion_result["exited"]:
raise Exception("Server exited")
# 5. Get updated local continuation. N.B. The originally-spawned task may have delegated, so we need to find the task from the actual producer of the expected output.
task_for_output_url = urlparse.urljoin(
self.master_uri, "/global_data/%d/task" % expected_output_id)
(_, content) = http.request(task_for_output_url, "GET")
end_task_descriptor = simplejson.loads(
content, object_hook=json_decode_object_hook)
saved_continuation_url = sw_to_external_url(
end_task_descriptor['saved_continuation_uri'])
(_, content) = http.request(saved_continuation_url)
self.local_continuation = pickle.loads(content)
# 6. Dereference result.
return self.dereference_task_result(completion_result.refs[0])
def do_print(self, arg):
task_stmt = self.stmt_parser.parse("return %s;" % arg)
if self.local_continuation.task_stmt is None:
self.stmt_parser.parser.restart()
print "Syntax error"
return
result = self.submit_task_and_wait(task_stmt)
print result
return False
def do_exit(self, arg):
return True
def do_quit(self, arg):
return True
def do_EOF(self, arg):
print
return True
def default(self, line):
task_stmt = self.stmt_parser.parse(line)
if task_stmt is None:
self.stmt_parser.parser.restart()
print "Syntax error"
return
result = self.submit_task_and_wait(task_stmt)
print result
return False
