feast/sdk/python/feast/feature_server.py at master · fbad/feast · GitHub

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import json

import threading

import traceback

import warnings

from typing import List, Optional

import gunicorn.app.base

import pandas as pd

from dateutil import parser

from fastapi import FastAPI, HTTPException, Request, Response, status

from fastapi.logger import logger

from fastapi.params import Depends

from google.protobuf.json_format import MessageToDict, Parse

from pydantic import BaseModel

import feast

from feast import proto_json, utils

from feast.data_source import PushMode

from feast.errors import PushSourceNotFoundException

from feast.protos.feast.serving.ServingService_pb2 import GetOnlineFeaturesRequest

# TODO: deprecate this in favor of push features

class WriteToFeatureStoreRequest(BaseModel):

feature_view_name: str

df: dict

allow_registry_cache: bool = True

class PushFeaturesRequest(BaseModel):

push_source_name: str

df: dict

allow_registry_cache: bool = True

to: str = "online"

class MaterializeRequest(BaseModel):

start_ts: str

end_ts: str

feature_views: Optional[List[str]] = None

class MaterializeIncrementalRequest(BaseModel):

end_ts: str

feature_views: Optional[List[str]] = None

def get_app(store: "feast.FeatureStore", registry_ttl_sec: int = 5):

proto_json.patch()

app = FastAPI()

# Asynchronously refresh registry, notifying shutdown and canceling the active timer if the app is shutting down

registry_proto = None

shutting_down = False

active_timer: Optional[threading.Timer] = None

async def get_body(request: Request):

return await request.body()

def async_refresh():

store.refresh_registry()

nonlocal registry_proto

registry_proto = store.registry.proto()

if shutting_down:

return

nonlocal active_timer

active_timer = threading.Timer(registry_ttl_sec, async_refresh)

active_timer.start()

@app.on_event("shutdown")

def shutdown_event():

nonlocal shutting_down

shutting_down = True

if active_timer:

active_timer.cancel()

async_refresh()

@app.post("/get-online-features")

def get_online_features(body=Depends(get_body)):

try:

# Validate and parse the request data into GetOnlineFeaturesRequest Protobuf object

request_proto = GetOnlineFeaturesRequest()

Parse(body, request_proto)

# Initialize parameters for FeatureStore.get_online_features(...) call

if request_proto.HasField("feature_service"):

features = store.get_feature_service(

request_proto.feature_service, allow_cache=True

)

else:

features = list(request_proto.features.val)

full_feature_names = request_proto.full_feature_names

batch_sizes = [len(v.val) for v in request_proto.entities.values()]

num_entities = batch_sizes[0]

if any(batch_size != num_entities for batch_size in batch_sizes):

raise HTTPException(status_code=500, detail="Uneven number of columns")

response_proto = store._get_online_features(

features=features,

entity_values=request_proto.entities,

full_feature_names=full_feature_names,

native_entity_values=False,

).proto

# Convert the Protobuf object to JSON and return it

return MessageToDict( # type: ignore

response_proto, preserving_proto_field_name=True, float_precision=18

)

except Exception as e:

# Print the original exception on the server side

logger.exception(traceback.format_exc())

# Raise HTTPException to return the error message to the client

raise HTTPException(status_code=500, detail=str(e))

@app.post("/push")

def push(body=Depends(get_body)):

try:

request = PushFeaturesRequest(**json.loads(body))

df = pd.DataFrame(request.df)

if request.to == "offline":

to = PushMode.OFFLINE

elif request.to == "online":

to = PushMode.ONLINE

elif request.to == "online_and_offline":

to = PushMode.ONLINE_AND_OFFLINE

else:

raise ValueError(

f"{request.to} is not a supported push format. Please specify one of these ['online', 'offline', 'online_and_offline']."

)

store.push(

push_source_name=request.push_source_name,

df=df,

allow_registry_cache=request.allow_registry_cache,

to=to,

)

except PushSourceNotFoundException as e:

# Print the original exception on the server side

logger.exception(traceback.format_exc())

# Raise HTTPException to return the error message to the client

raise HTTPException(status_code=422, detail=str(e))

except Exception as e:

# Print the original exception on the server side

logger.exception(traceback.format_exc())

# Raise HTTPException to return the error message to the client

raise HTTPException(status_code=500, detail=str(e))

@app.post("/write-to-online-store")

def write_to_online_store(body=Depends(get_body)):

warnings.warn(

"write_to_online_store is deprecated. Please consider using /push instead",

RuntimeWarning,

)

try:

request = WriteToFeatureStoreRequest(**json.loads(body))

df = pd.DataFrame(request.df)

store.write_to_online_store(

feature_view_name=request.feature_view_name,

df=df,

allow_registry_cache=request.allow_registry_cache,

)

except Exception as e:

# Print the original exception on the server side

logger.exception(traceback.format_exc())

# Raise HTTPException to return the error message to the client

raise HTTPException(status_code=500, detail=str(e))

@app.get("/health")

def health():

return Response(status_code=status.HTTP_200_OK)

@app.post("/materialize")

def materialize(body=Depends(get_body)):

try:

request = MaterializeRequest(**json.loads(body))

store.materialize(

utils.make_tzaware(parser.parse(request.start_ts)),

utils.make_tzaware(parser.parse(request.end_ts)),

request.feature_views,

)

except Exception as e:

# Print the original exception on the server side

logger.exception(traceback.format_exc())

# Raise HTTPException to return the error message to the client

raise HTTPException(status_code=500, detail=str(e))

@app.post("/materialize-incremental")

def materialize_incremental(body=Depends(get_body)):

try:

request = MaterializeIncrementalRequest(**json.loads(body))

store.materialize_incremental(

utils.make_tzaware(parser.parse(request.end_ts)), request.feature_views

)

except Exception as e:

# Print the original exception on the server side

logger.exception(traceback.format_exc())

# Raise HTTPException to return the error message to the client

raise HTTPException(status_code=500, detail=str(e))

return app

class FeastServeApplication(gunicorn.app.base.BaseApplication):

def __init__(self, store: "feast.FeatureStore", **options):

self._app = get_app(

store=store,

registry_ttl_sec=options.get("registry_ttl_sec", 5),

)

self._options = options

super().__init__()

def load_config(self):

for key, value in self._options.items():

if key.lower() in self.cfg.settings and value is not None:

self.cfg.set(key.lower(), value)

self.cfg.set("worker_class", "uvicorn.workers.UvicornWorker")

def load(self):

return self._app

def start_server(

store: "feast.FeatureStore",

host: str,

port: int,

no_access_log: bool,

workers: int,

keep_alive_timeout: int,

registry_ttl_sec: int = 5,

FeastServeApplication(

store=store,

bind=f"{host}:{port}",

accesslog=None if no_access_log else "-",

workers=workers,

keepalive=keep_alive_timeout,

registry_ttl_sec=registry_ttl_sec,

).run()

feast/sdk/python/feast/feature_server.py at master · fbad/feast · GitHub

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