Pub/Sub Admin -- create
Create topic
Create subscription
for topic
Pub/Sub -- post and subscribe
Send or retrieve/ack one message at a time
Message Retrieval
(acks one message at a time)
Send
copies of message
to topic
Pub/Sub -- batch pull
Retrieve messages from different subscriptions, and ack as a batch
Subscription1
Subscription2
Pub/Sub Admin -- delete
Delete topic
Delete subscription