/
publisher.py
50 lines (38 loc) · 1.44 KB
/
publisher.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
from abc import abstractmethod
from typing import AsyncContextManager, Mapping, ContextManager
from concurrent import futures
class AsyncPublisher(AsyncContextManager):
"""
An AsyncPublisher publishes messages similar to Google Pub/Sub, but must be used in an
async context. Any publish failures are permanent.
"""
@abstractmethod
async def publish(self, data: bytes, ordering_key: str = "", **attrs: Mapping[str, str]) -> str:
"""
Publish a message.
Args:
data: The bytestring payload of the message
ordering_key: The key to enforce ordering on, or "" for no ordering.
**attrs: Additional attributes to send.
Returns:
An ack id, which can be decoded using PublishMetadata.decode.
Raises:
GoogleApiCallError: On a permanent failure.
"""
class Publisher(ContextManager):
"""
A Publisher publishes messages similar to Google Pub/Sub. Any publish failures are permanent.
"""
@abstractmethod
def publish(self, data: bytes, ordering_key: str = "", **attrs: Mapping[str, str]) -> 'futures.Future[str]':
"""
Publish a message.
Args:
data: The bytestring payload of the message
ordering_key: The key to enforce ordering on, or "" for no ordering.
**attrs: Additional attributes to send.
Returns:
A future completed with an ack id, which can be decoded using PublishMetadata.decode.
Raises:
GoogleApiCallError: On a permanent failure.
"""