def __init__(self, nlprp_request: JsonObjectType) -> None:
"""
Args:
nlprp_request: dictionary from the (entire) JSON NLPRP request
Raises:
:exc:`NlprpError` for malformed requests
"""
self.nlprp_request = nlprp_request
args = json_get_toplevel_args(nlprp_request)
# The processors being requested. We fetch all of them now, so they
# can be iterated through fast for each document.
requested_processors = json_get_array(args,
NKeys.PROCESSORS,
required=True)
self.processors = [
ServerProcessor.get_processor_nlprp(d)
for d in requested_processors
]
# Queue?
self.queue = json_get_bool(args, NKeys.QUEUE, default=False)
# Client job ID
self.client_job_id = json_get_str(args,
NKeys.CLIENT_JOB_ID,
default="")
# Include the source text in the reply?
self.include_text = json_get_bool(args, NKeys.INCLUDE_TEXT)
# Content: list of objects (each with text and metadata)
self.content = json_get_array(args, NKeys.CONTENT, required=True)
def show_queue(self) -> JsonObjectType:
"""
Finds the queue entries associated with the client, optionally
restricted to one client job id.
"""
args = json_get_toplevel_args(self.body, required=False)
if args:
client_job_id = json_get_str(args,
NKeys.CLIENT_JOB_ID,
default="",
required=False)
else:
client_job_id = ""
# Queue IDs that are of interest
queue_id_wheres = [Document.username == self.username
] # type: List[ClauseElement] # nopep8
if client_job_id:
queue_id_wheres.append(Document.client_job_id == client_job_id)
# noinspection PyUnresolvedReferences
queue_ids = fetch_all_first_values(
dbsession,
select([Document.queue_id]).select_from(Document.__table__).where(
and_(*queue_id_wheres)).distinct().order_by(
Document.queue_id)) # type: List[str]
queue_answer = [] # type: JsonArrayType
for queue_id in queue_ids:
# DocProcRequest objects that are of interest
dprs = list(
dbsession.query(DocProcRequest).join(Document).filter(
Document.queue_id ==
queue_id).all()) # type: List[DocProcRequest]
busy = not all([dpr.done for dpr in dprs])
if busy:
max_time = datetime.datetime.min
else:
max_time = max([dpr.when_done_utc for dpr in dprs])
assert dprs, "No DocProcRequests found; bug?"
dt_submitted = dprs[0].document.datetime_submitted_pendulum
queue_answer.append({
NKeys.QUEUE_ID:
queue_id,
NKeys.CLIENT_JOB_ID:
client_job_id,
NKeys.STATUS:
NlprpValues.BUSY if busy else NlprpValues.READY,
NKeys.DATETIME_SUBMITTED:
pendulum_to_nlprp_datetime(dt_submitted, to_utc=True),
NKeys.DATETIME_COMPLETED:
(None if busy else pendulum_to_nlprp_datetime(max_time,
to_utc=True))
})
return self.create_response(status=HttpStatus.OK,
extra_info={NKeys.QUEUE: queue_answer})
def handle_nlprp_request(self) -> JsonObjectType:
"""
The main function. Authenticates user and checks the request is not
malformed, then calls the function relating to the command specified
by the user.
"""
self._authenticate()
self._set_body_json_from_request()
command = json_get_str(self.body, NKeys.COMMAND, required=True)
log.debug(f"NLPRP request received from {self.request.remote_addr}: "
f"username={self.username}, command={command}")
if DEBUG_SHOW_REQUESTS:
log.debug(f"Request: {self.body!r}")
return self.parse_command(command)
def gen_text_metadataobj(
self) -> Generator[Tuple[str, JsonValueType], None, None]:
"""
Generates text and metadata pairs from the request, with the metadata
in JSON object (Python dictionary) format.
Yields:
tuple: ``(text, metadata)``, as above
"""
for document in self.content:
text = json_get_str(document, NKeys.TEXT, required=True)
metadata = json_get_value(document,
NKeys.METADATA,
default=None,
required=False)
yield text, metadata
def gen_text_metadatastr(self) -> Generator[Tuple[str, str], None, None]:
"""
Generates text and metadata pairs from the request, with the metadata
in string (serialized JSON) format.
Yields:
tuple: ``(text, metadata)``, as above
"""
try:
for document in self.content:
text = json_get_str(document, NKeys.TEXT, required=True)
metadata = json_get_value(document,
NKeys.METADATA,
default=None,
required=False)
metadata_str = json.dumps(metadata,
separators=JSON_SEPARATORS_COMPACT)
yield text, metadata_str
except KeyError:
raise key_missing_error(key=NKeys.TEXT)
def fetch_from_queue(self) -> JsonObjectType:
"""
Fetches requests for all document-processor pairs for the queue_id
supplied by the user (if complete).
"""
# ---------------------------------------------------------------------
# Args
# ---------------------------------------------------------------------
args = json_get_toplevel_args(self.body)
queue_id = json_get_str(args, NKeys.QUEUE_ID, required=True)
# ---------------------------------------------------------------------
# Start with the DocProcRequests, because if some are still busy,
# we will return a "busy" response.
# ---------------------------------------------------------------------
q_dpr = (dbsession.query(DocProcRequest).join(Document).filter(
Document.username == self.username).filter(
Document.queue_id == queue_id))
q_doc = (dbsession.query(Document).filter(
Document.username == self.username).filter(
Document.queue_id == queue_id))
dprs = list(q_dpr.all()) # type: List[DocProcRequest]
if not dprs:
raise mkerror(NOT_FOUND, "The queue_id given was not found")
busy = not all([dpr.done for dpr in dprs])
if busy:
response = self.create_response(HttpStatus.PROCESSING, {})
# todo: is it correct (from previous comments) that we can't
# return JSON via Pyramid with a status of HttpStatus.PROCESSING?
# If that's true, we have to force as below, but then we need to
# alter the NLPRP docs (as these state the JSON code and HTTP code
# should always be the same).
self.set_http_response_status(HttpStatus.OK)
return response
# ---------------------------------------------------------------------
# Make it easy to look up processors
# ---------------------------------------------------------------------
processor_cache = {} # type: Dict[str, ServerProcessor]
def get_processor_cached(_processor_id: str) -> ServerProcessor:
"""
Cache lookups for speed. (All documents will share the same set
of processors, so there'll be a fair bit of duplication.)
"""
nonlocal processor_cache
try:
return processor_cache[_processor_id]
except KeyError:
_processor = ServerProcessor.get_processor_from_id(
_processor_id) # may raise # noqa
processor_cache[_processor_id] = _processor
return _processor
# ---------------------------------------------------------------------
# Collect results by document
# ---------------------------------------------------------------------
doc_results = [] # type: JsonArrayType
client_job_id = None # type: Optional[str]
docs = set(dpr.document for dpr in dprs)
for doc in docs:
if client_job_id is None:
client_job_id = doc.client_job_id
processor_data = [] # type: JsonArrayType
# ... data for *all* the processors for this doc
for dpr in doc.docprocrequests:
procresult = json.loads(dpr.results) # type: Dict[str, Any]
if procresult[NKeys.NAME] is None:
processor = get_processor_cached(dpr.processor_id)
procresult[NKeys.NAME] = processor.name
procresult[NKeys.TITLE] = processor.title
procresult[NKeys.VERSION] = processor.version
processor_data.append(procresult)
metadata = json.loads(doc.client_metadata)
doc_result = {
NKeys.METADATA: metadata,
NKeys.PROCESSORS: processor_data
}
if doc.include_text:
doc_result[NKeys.TEXT] = doc.doctext
doc_results.append(doc_result)
# ---------------------------------------------------------------------
# Delete leftovers
# ---------------------------------------------------------------------
with sqla_transaction_commit():
q_doc.delete(synchronize_session=False)
# ... will also delete the DocProcRequests via a cascade
response_info = {
NKeys.CLIENT_JOB_ID:
(client_job_id if client_job_id is not None else ""),
NKeys.RESULTS:
doc_results
}
return self.create_response(status=HttpStatus.OK,
extra_info=response_info)
