feat: add max messages batching for Cloud Storage subscriptions (#1224)

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

google/pubsub_v1/types/pubsub.py

@@ -1432,6 +1432,10 @@ class CloudStorageConfig(proto.Message):
  Storage file before a new file is created. Min 1 KB, max 10
  GiB. The max_bytes limit may be exceeded in cases where
  messages are larger than the limit.
+ max_messages (int):
+ Optional. The maximum number of messages that
+ can be written to a Cloud Storage file before a
+ new file is created. Min 1000 messages.
  state (google.pubsub_v1.types.CloudStorageConfig.State):
  Output only. An output-only field that
  indicates whether or not the subscription can
@@ -1551,6 +1555,10 @@ class AvroConfig(proto.Message):
  proto.INT64,
  number=7,
  )
+ max_messages: int = proto.Field(
+ proto.INT64,
+ number=8,
+ )
  state: State = proto.Field(
  proto.ENUM,
  number=9,

samples/generated_samples/snippet_metadata_google.pubsub.v1.json

@@ -8,7 +8,7 @@
  ],
  "language": "PYTHON",
  "name": "google-cloud-pubsub",
- "version": "2.22.0"
+ "version": "0.1.0"
  },
  "snippets": [
  {