Revert "Event-Publisher Flush Queue on Shutdown (#767)" (#790)

This reverts commit fcc0c45.

baseplate/sidecars/__init__.py

@@ -64,10 +64,6 @@ def age(self) -> float:
             return 0
         return time.time() - self.batch_start
 
-    @property
-    def is_ready(self) -> bool:
-        return self.age >= self.max_age
-
     def add(self, item: Optional[bytes]) -> None:
         if self.age >= self.max_age:
             raise BatchFull

baseplate/sidecars/event_publisher.py

@@ -5,10 +5,7 @@
 import hashlib
 import hmac
 import logging
-import signal
-import sys
 
-from types import FrameType
 from typing import Any
 from typing import List
 from typing import Optional
@@ -167,16 +164,6 @@ def publish(self, payload: SerializedBatch) -> None:
 SERIALIZER_BY_VERSION = {"2": V2Batch, "2j": V2JBatch}
 
 
-def serialize_and_publish_batch(publisher: BatchPublisher, batcher: TimeLimitedBatch) -> None:
-    """Serializes batch, publishes it using the publisher, and then resets the batch for more messages."""
-    serialized_batch = batcher.serialize()
-    try:
-        publisher.publish(serialized_batch)
-    except Exception:
-        logger.exception("Events publishing failed.")
-    batcher.reset()
-
-
 def publish_events() -> None:
     arg_parser = argparse.ArgumentParser()
     arg_parser.add_argument(
@@ -227,28 +214,6 @@ def publish_events() -> None:
     batcher = TimeLimitedBatch(serializer, MAX_BATCH_AGE)
     publisher = BatchPublisher(metrics_client, cfg)
 
-    def flush_queue_signal_handler(_signo: int, _frame: FrameType) -> None:
-        """Signal handler for flushing messages from the queue and publishing them."""
-        message: Optional[bytes]
-        logger.info("Shutdown signal received. Flushing events...")
-
-        while True:
-            try:
-                message = event_queue.get(timeout=0.2)
-            except TimedOutError:
-                if len(batcher.serialize()) > 0:
-                    serialize_and_publish_batch(publisher, batcher)
-                break
-
-            if batcher.is_ready:
-                serialize_and_publish_batch(publisher, batcher)
-            batcher.add(message)
-        sys.exit(0)
-
-    for sig in (signal.SIGINT, signal.SIGTERM):
-        signal.signal(sig, flush_queue_signal_handler)
-        signal.siginterrupt(sig, False)
-
     while True:
         message: Optional[bytes]
 
@@ -257,8 +222,18 @@ def flush_queue_signal_handler(_signo: int, _frame: FrameType) -> None:
         except TimedOutError:
             message = None
 
-        if batcher.is_ready:
-            serialize_and_publish_batch(publisher, batcher)
+        try:
+            batcher.add(message)
+            continue
+        except BatchFull:
+            pass
+
+        serialized = batcher.serialize()
+        try:
+            publisher.publish(serialized)
+        except Exception:
+            logger.exception("Events publishing failed.")
+        batcher.reset()
         batcher.add(message)