Workers for analyticunits #203 (#265)

* rm async from analytic_unit_worker + some refactorings in maager

* AnalyticUnitManager

* workers for analytic units

analytics/analytics/analytic_unit_manager.py

@@ -2,34 +2,56 @@ from typing import Dict
 import pandas as pd
 import numpy as np
 import logging, traceback
+from concurrent.futures import Executor, ThreadPoolExecutor
 
 import detectors
 from analytic_unit_worker import AnalyticUnitWorker
 
+
 logger = logging.getLogger('AnalyticUnitManager')
+WORKERS_EXECUTORS = 20
 
 AnalyticUnitId = str
-analytic_workers: Dict[AnalyticUnitId, AnalyticUnitWorker] = dict()
 
 
 def get_detector_by_type(analytic_unit_type) -> detectors.Detector:
     return detectors.PatternDetector(analytic_unit_type)
 
-def ensure_worker(analytic_unit_id, analytic_unit_type) -> AnalyticUnitWorker:
-    if analytic_unit_id in analytic_workers:
+def prepare_data(data: list):
+    """
+        Takes list
+        - converts it into pd.DataFrame,
+        - converts 'timestamp' column to pd.Datetime,
+        - subtracts min value from dataset
+    """
+    data = pd.DataFrame(data, columns=['timestamp', 'value'])
+
+    data['timestamp'] = pd.to_datetime(data['timestamp'], unit='ms')
+    if not np.isnan(min(data['value'])):
+        data['value'] = data['value'] - min(data['value'])
+
+    return data
+
+
+class AnalyticUnitManager:
+
+    def __init__(self):
+        self.analytic_workers: Dict[AnalyticUnitId, AnalyticUnitWorker] = dict()
+        self.workers_executor = ThreadPoolExecutor(max_workers=WORKERS_EXECUTORS)
+
+    def __ensure_worker(self, analytic_unit_id, analytic_unit_type) -> AnalyticUnitWorker:
+        if analytic_unit_id in self.analytic_workers:
             # TODO: check that type is the same
-        return analytic_workers[analytic_unit_id]
+            return self.analytic_workers[analytic_unit_id]
         detector = get_detector_by_type(analytic_unit_type)
-    worker = AnalyticUnitWorker(analytic_unit_id, detector)
-    analytic_workers[analytic_unit_id] = worker
+        worker = AnalyticUnitWorker(analytic_unit_id, detector, self.workers_executor)
+        self.analytic_workers[analytic_unit_id] = worker
         return worker
 
-async def handle_analytic_task(task):
+    async def handle_analytic_task(self, task):
         try:
             payload = task['payload']
-
-        worker = ensure_worker(task['analyticUnitId'], payload['pattern'])
-
+            worker = self.__ensure_worker(task['analyticUnitId'], payload['pattern'])
             data = prepare_data(payload['data'])
             result_payload = {}
             if task['type'] == 'LEARN':
@@ -52,17 +74,4 @@ async def handle_analytic_task(task):
                 'error': str(e)
             }
 
-def prepare_data(data: list):
-    """
-        Takes list
-        - converts it into pd.DataFrame,
-        - converts 'timestamp' column to pd.Datetime,
-        - subtracts min value from dataset
-    """
-    data = pd.DataFrame(data, columns=['timestamp', 'value'])
-
-    data['timestamp'] = pd.to_datetime(data['timestamp'], unit='ms')
-    if not np.isnan(min(data['value'])):
-        data['value'] = data['value'] - min(data['value'])
 
-    return data

analytics/analytics/analytic_unit_worker.py

@@ -4,19 +4,26 @@ import logging
 import pandas as pd
 from typing import Optional
 from models import AnalyticUnitCache
-
+from concurrent.futures import Executor
+import asyncio
 
 logger = logging.getLogger('AnalyticUnitWorker')
 
 
 class AnalyticUnitWorker:
 
-    def __init__(self, analytic_unit_id: str, detector: detectors.Detector):
+    def __init__(self, analytic_unit_id: str, detector: detectors.Detector, executor: Executor):
         self.analytic_unit_id = analytic_unit_id
         self.detector = detector
+        self.executor: Executor = executor
 
-    async def do_learn(self, segments: list, data: pd.DataFrame, cache: Optional[AnalyticUnitCache]) -> AnalyticUnitCache:
-        return await self.detector.train(data, segments, cache)
+    async def do_learn(
+        self, segments: list, data: pd.DataFrame, cache: Optional[AnalyticUnitCache]
+    ) -> AnalyticUnitCache:
+        new_cache: AnalyticUnitCache = await asyncio.get_event_loop().run_in_executor(
+            self.executor, self.detector.train, data, segments, cache
+        )
+        return new_cache
 
     async def do_predict(self, data: pd.DataFrame, cache: Optional[AnalyticUnitCache]) -> dict:
-        return await self.detector.predict(data, cache)
+        return self.detector.predict(data, cache)

analytics/analytics/detectors/detector.py

@@ -7,9 +7,12 @@ from typing import Optional
 class Detector(ABC):
 
     @abstractmethod
-    async def train(self, dataframe: DataFrame, segments: list, cache: Optional[AnalyticUnitCache]) -> AnalyticUnitCache:
+    def train(self, dataframe: DataFrame, segments: list, cache: Optional[AnalyticUnitCache]) -> AnalyticUnitCache:
+        """
+            Should be thread-safe with other detectors' train method
+        """
         pass
 
     @abstractmethod
-    async def predict(self, dataframe: DataFrame, cache: Optional[AnalyticUnitCache]) -> dict:
+    def predict(self, dataframe: DataFrame, cache: Optional[AnalyticUnitCache]) -> dict:
         pass

analytics/analytics/detectors/pattern_detector.py

@@ -35,14 +35,14 @@ class PatternDetector(Detector):
         self.model = resolve_model_by_pattern(self.pattern_type)
         window_size = 100
 
-    async def train(self, dataframe: pd.DataFrame, segments: list, cache: Optional[models.AnalyticUnitCache]) -> models.AnalyticUnitCache:
+    def train(self, dataframe: pd.DataFrame, segments: list, cache: Optional[models.AnalyticUnitCache]) -> models.AnalyticUnitCache:
         # TODO: pass only part of dataframe that has segments
         new_cache = self.model.fit(dataframe, segments, cache)
         return {
             'cache': new_cache
         }
 
-    async def predict(self, dataframe: pd.DataFrame, cache: Optional[models.AnalyticUnitCache]) -> dict:
+    def predict(self, dataframe: pd.DataFrame, cache: Optional[models.AnalyticUnitCache]) -> dict:
         # TODO: split and sleep (https://github.com/hastic/hastic-server/pull/124#discussion_r214085643)
         predicted = self.model.predict(dataframe, cache)
 

analytics/bin/server

@@ -13,7 +13,7 @@ import asyncio
 import traceback
 
 import services
-from analytic_unit_manager import handle_analytic_task
+from analytic_unit_manager import AnalyticUnitManager
 
 
 root = logging.getLogger()
@@ -22,6 +22,8 @@ logger = logging.getLogger('SERVER')
 
 server_service: services.ServerService = None
 data_service: services.DataService = None
+analytic_unit_manager: AnalyticUnitManager = None
+
 
 root.setLevel(logging.DEBUG)
 
@@ -36,8 +38,6 @@ logging_handler.setFormatter(logging_formatter)
 root.addHandler(logging_handler)
 
 
-
-
 async def handle_task(task: object):
     try:
 
@@ -53,7 +53,7 @@ async def handle_task(task: object):
         message = services.server_service.ServerMessage('TASK_RESULT', task_result_payload)
         await server_service.send_message(message)
 
-        res = await handle_analytic_task(task)
+        res = await analytic_unit_manager.handle_analytic_task(task)
         res['_id'] = task['_id']
 
         message = services.server_service.ServerMessage('TASK_RESULT', res)
@@ -68,7 +68,6 @@ async def handle_message(message: services.ServerMessage):
     if message.method == 'TASK':
         await handle_task(message.payload)
 
-
 def init_services():
     logger.info("Starting services...")
     logger.info("Server...")
@@ -77,18 +76,20 @@ def init_services():
     logger.info("Data service...")
     data_service = services.DataService(server_service)
     logger.info("Ok")
+    logger.info("Analytic unit manager...")
+    analytic_unit_manager = AnalyticUnitManager()
+    logger.info("Ok")
 
-    return server_service, data_service
+    return server_service, data_service, analytic_unit_manager
 
 async def app_loop():
     await server_service.handle_loop()
-    # await asyncio.gather(server_service.handle_loop(), test_file_save())
 
 
 if __name__ == "__main__":
     loop = asyncio.get_event_loop()
     logger.info("Ok")
-    server_service, data_service = init_services()
+    server_service, data_service, analytic_unit_manager = init_services()
     print('Analytics process is running') # we need to print to stdout and flush
     sys.stdout.flush()                    # because node.js expects it