async def publish(self,
topic: Union[TopicPath, str],
data: bytes,
ordering_key: str = "",
**attrs: Mapping[str, str]) -> str:
if isinstance(topic, str):
topic = TopicPath.parse(topic)
async def create_and_open():
client = self._publisher_factory(topic)
await client.__aenter__()
return client
publisher = await self._multiplexer.get_or_create(
topic, create_and_open)
try:
return await publisher.publish(data=data,
ordering_key=ordering_key,
**attrs)
except GoogleAPICallError as e:
await self._multiplexer.try_erase(topic, publisher)
raise e
def delete_lite_topic(project_number, cloud_region, zone_id, topic_id):
# [START pubsublite_delete_topic]
from google.api_core.exceptions import NotFound
from google.cloud.pubsublite import AdminClient
from google.cloud.pubsublite.types import CloudRegion, CloudZone, TopicPath
# TODO(developer):
# project_number = 1122334455
# cloud_region = "us-central1"
# zone_id = "a"
# topic_id = "your-topic-id"
cloud_region = CloudRegion(cloud_region)
location = CloudZone(cloud_region, zone_id)
topic_path = TopicPath(project_number, location, topic_id)
client = AdminClient(cloud_region)
try:
client.delete_topic(topic_path)
print(f"{topic_path} deleted successfully.")
except NotFound:
print(f"{topic_path} not found.")
def list_lite_subscriptions_in_topic(project_number, cloud_region, zone_id,
topic_id):
# [START pubsublite_list_subscriptions_in_topic]
from google.cloud.pubsublite import AdminClient
from google.cloud.pubsublite.types import CloudRegion, CloudZone, TopicPath
# TODO(developer):
# project_number = 1122334455
# cloud_region = "us-central1"
# zone_id = "a"
# topic_id = "your-topic-id"
cloud_region = CloudRegion(cloud_region)
location = CloudZone(cloud_region, zone_id)
topic_path = TopicPath(project_number, location, topic_id)
client = AdminClient(cloud_region)
response = client.list_topic_subscriptions(topic_path)
for subscription_path in response:
print(subscription_path)
print(f"{len(response)} subscription(s) listed in your topic.")
def get_lite_topic(project_number, cloud_region, zone_id, topic_id):
# [START pubsublite_get_topic]
from google.api_core.exceptions import NotFound
from google.cloud.pubsublite import AdminClient
from google.cloud.pubsublite.types import CloudRegion, CloudZone, TopicPath
# TODO(developer):
# project_number = 1122334455
# cloud_region = "us-central1"
# zone_id = "a"
# topic_id = "your-topic-id"
cloud_region = CloudRegion(cloud_region)
location = CloudZone(cloud_region, zone_id)
topic_path = TopicPath(project_number, location, topic_id)
client = AdminClient(cloud_region)
try:
response = client.get_topic(topic_path)
num_partitions = client.get_topic_partition_count(topic_path)
print(f"{response.name} has {num_partitions} partition(s).")
except NotFound:
print(f"{topic_path} not found.")
def create_topic(self, topic: Topic) -> Topic:
path = TopicPath.parse(topic.name)
return self._underlying.create_topic(parent=str(
path.to_location_path()),
topic=topic,
topic_id=path.name)
def topic():
return TopicPath.parse("projects/1/locations/us-central1-a/topics/topic")
import datetime as dt
import json
import random
import time
from google.cloud.pubsublite.cloudpubsub import PublisherClient
from google.cloud.pubsublite.types import (CloudRegion, CloudZone,
MessageMetadata, TopicPath)
project_number = 533637743951
cloud_region = "asia-east1"
zone_id = "a"
topic_id = "test_topic"
location = CloudZone(CloudRegion(cloud_region), zone_id)
topic_path = TopicPath(project_number, location, topic_id)
with PublisherClient() as publisher:
for i in range(200):
data = {
"timestamp": dt.datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
"value": random.randint(1, 10)
}
data_encoded = json.dumps(data).encode("utf8")
future = publisher.publish(topic_path, data_encoded)
print(future.result())
time.sleep(1)