Merge pull request #255 from flashbots/split-out-workers-from-task

Separate importing tasks from importing the worker

cli.py

@@ -4,12 +4,15 @@ import sys
 from datetime import datetime
 
 import click
+import dramatiq
 
 from mev_inspect.concurrency import coro
 from mev_inspect.crud.prices import write_prices
 from mev_inspect.db import get_inspect_session, get_trace_session
 from mev_inspect.inspector import MEVInspector
 from mev_inspect.prices import fetch_prices, fetch_prices_range
+from mev_inspect.queue.broker import connect_broker
+from mev_inspect.queue.tasks import inspect_many_blocks_task
 
 RPC_URL_ENV = "RPC_URL"
 
@@ -97,14 +100,13 @@ async def inspect_many_blocks_command(
 @click.argument("before_block", type=int)
 @click.argument("batch_size", type=int, default=10)
 def enqueue_many_blocks_command(after_block: int, before_block: int, batch_size: int):
-    from worker import (  # pylint: disable=import-outside-toplevel
-        inspect_many_blocks_task,
-    )
+    broker = connect_broker()
+    inspect_many_blocks_actor = dramatiq.actor(inspect_many_blocks_task, broker=broker)
 
     for batch_after_block in range(after_block, before_block, batch_size):
         batch_before_block = min(batch_after_block + batch_size, before_block)
         logger.info(f"Sending {batch_after_block} to {batch_before_block}")
-        inspect_many_blocks_task.send(batch_after_block, batch_before_block)
+        inspect_many_blocks_actor.send(batch_after_block, batch_before_block)
 
 
 @cli.command()

mev_inspect/queue/broker.py

@@ -0,0 +1,7 @@
+import os
+
+from dramatiq.brokers.redis import RedisBroker
+
+
+def connect_broker():
+    return RedisBroker(host="redis-master", password=os.environ["REDIS_PASSWORD"])

mev_inspect/queue/middleware.py

@@ -0,0 +1,75 @@
+import asyncio
+import logging
+from threading import local
+
+from dramatiq.middleware import Middleware
+
+from mev_inspect.db import get_inspect_sessionmaker, get_trace_sessionmaker
+from mev_inspect.inspector import MEVInspector
+
+logger = logging.getLogger(__name__)
+
+
+class DbMiddleware(Middleware):
+    STATE = local()
+    INSPECT_SESSION_STATE_KEY = "InspectSession"
+    TRACE_SESSION_STATE_KEY = "TraceSession"
+
+    @classmethod
+    def get_inspect_sessionmaker(cls):
+        return getattr(cls.STATE, cls.INSPECT_SESSION_STATE_KEY, None)
+
+    @classmethod
+    def get_trace_sessionmaker(cls):
+        return getattr(cls.STATE, cls.TRACE_SESSION_STATE_KEY, None)
+
+    def before_process_message(self, _broker, message):
+        if not hasattr(self.STATE, self.INSPECT_SESSION_STATE_KEY):
+            logger.info("Building sessionmakers")
+            setattr(
+                self.STATE, self.INSPECT_SESSION_STATE_KEY, get_inspect_sessionmaker()
+            )
+            setattr(self.STATE, self.TRACE_SESSION_STATE_KEY, get_trace_sessionmaker())
+        else:
+            logger.info("Sessionmakers already set")
+
+
+class InspectorMiddleware(Middleware):
+    STATE = local()
+    INSPECT_STATE_KEY = "inspector"
+
+    def __init__(self, rpc_url):
+        self._rpc_url = rpc_url
+
+    @classmethod
+    def get_inspector(cls):
+        return getattr(cls.STATE, cls.INSPECT_STATE_KEY, None)
+
+    def before_process_message(
+        self, _broker, worker
+    ):  # pylint: disable=unused-argument
+        if not hasattr(self.STATE, self.INSPECT_STATE_KEY):
+            logger.info("Building inspector")
+            inspector = MEVInspector(
+                self._rpc_url,
+                max_concurrency=5,
+                request_timeout=300,
+            )
+
+            setattr(self.STATE, self.INSPECT_STATE_KEY, inspector)
+        else:
+            logger.info("Inspector already exists")
+
+
+class AsyncMiddleware(Middleware):
+    def before_process_message(
+        self, _broker, message
+    ):  # pylint: disable=unused-argument
+        self.loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(self.loop)
+
+    def after_process_message(
+        self, _broker, message, *, result=None, exception=None
+    ):  # pylint: disable=unused-argument
+        if hasattr(self, "loop"):
+            self.loop.close()

mev_inspect/queue/tasks.py

@@ -0,0 +1,32 @@
+import asyncio
+import logging
+from contextlib import contextmanager
+
+from .middleware import DbMiddleware, InspectorMiddleware
+
+logger = logging.getLogger(__name__)
+
+
+def inspect_many_blocks_task(
+    after_block: int,
+    before_block: int,
+):
+    with _session_scope(DbMiddleware.get_inspect_sessionmaker()) as inspect_db_session:
+        with _session_scope(DbMiddleware.get_trace_sessionmaker()) as trace_db_session:
+            asyncio.run(
+                InspectorMiddleware.get_inspector().inspect_many_blocks(
+                    inspect_db_session=inspect_db_session,
+                    trace_db_session=trace_db_session,
+                    after_block=after_block,
+                    before_block=before_block,
+                )
+            )
+
+
+@contextmanager
+def _session_scope(Session=None):
+    if Session is None:
+        yield None
+    else:
+        with Session() as session:
+            yield session

worker.py

@@ -1,87 +1,23 @@
-import asyncio
 import logging
 import os
 import sys
-import threading
-from contextlib import contextmanager
 
 import dramatiq
-from dramatiq.brokers.redis import RedisBroker
-from dramatiq.cli import main as dramatiq_worker
-from dramatiq.middleware import Middleware
 
-from mev_inspect.db import get_inspect_sessionmaker, get_trace_sessionmaker
-from mev_inspect.inspector import MEVInspector
-
-InspectSession = get_inspect_sessionmaker()
-TraceSession = get_trace_sessionmaker()
-
-thread_local = threading.local()
-logging.basicConfig(stream=sys.stdout, level=logging.INFO)
-logger = logging.getLogger(__name__)
-
-
-class AsyncMiddleware(Middleware):
-    def before_process_message(
-        self, _broker, message
-    ):  # pylint: disable=unused-argument
-        self.loop = asyncio.new_event_loop()
-        asyncio.set_event_loop(self.loop)
-
-    def after_process_message(
-        self, _broker, message, *, result=None, exception=None
-    ):  # pylint: disable=unused-argument
-        self.loop.close()
-
-
-class InspectorMiddleware(Middleware):
-    def before_process_message(
-        self, _broker, worker
-    ):  # pylint: disable=unused-argument
-        rpc = os.environ["RPC_URL"]
-
-        if not hasattr(thread_local, "inspector"):
-            logger.info("Building inspector")
-            thread_local.inspector = MEVInspector(
-                rpc,
-                max_concurrency=5,
-                request_timeout=300,
+from mev_inspect.queue.broker import connect_broker
+from mev_inspect.queue.middleware import (
+    AsyncMiddleware,
+    DbMiddleware,
+    InspectorMiddleware,
 )
-        else:
-            logger.info("Inspector already exists")
+from mev_inspect.queue.tasks import inspect_many_blocks_task
 
+logging.basicConfig(stream=sys.stdout, level=logging.INFO)
 
-broker = RedisBroker(host="redis-master", password=os.environ["REDIS_PASSWORD"])
+broker = connect_broker()
+broker.add_middleware(DbMiddleware())
 broker.add_middleware(AsyncMiddleware())
-broker.add_middleware(InspectorMiddleware())
+broker.add_middleware(InspectorMiddleware(os.environ["RPC_URL"]))
 dramatiq.set_broker(broker)
 
-
-@contextmanager
-def session_scope(Session=None):
-    if Session is None:
-        yield None
-    else:
-        with Session() as session:
-            yield session
-
-
-@dramatiq.actor
-def inspect_many_blocks_task(
-    after_block: int,
-    before_block: int,
-):
-    with session_scope(InspectSession) as inspect_db_session:
-        with session_scope(TraceSession) as trace_db_session:
-            asyncio.run(
-                thread_local.inspector.inspect_many_blocks(
-                    inspect_db_session=inspect_db_session,
-                    trace_db_session=trace_db_session,
-                    after_block=after_block,
-                    before_block=before_block,
-                )
-            )
-
-
-if __name__ == "__main__":
-    dramatiq_worker(processes=1, threads=1)
+dramatiq.actor(inspect_many_blocks_task)