What are topics and subscriptions in Google Cloud Pub/Sub?

May 12, 2016 ... I don't know how to subscribe to different topics at the same time and use a single client.loop() to check for a response. Feb 29, 2024 ... ... Publish-Subscribe Workflow Standard. New Standard will provide a basis for Publish-Subscribe implementation patterns within the OGC API ... Redis' Pub/Sub exhibits at-most-once message delivery semantics. As the name suggests, it means that a message will be delivered once if at all. Once the ... unsubscribe function is provided to disconnect subscriptions to channels. Examples¶. Simple Topics¶. Listen to a channel named “foobar” for data: // ... libp2p currently uses a design called gossipsub. It is named after the fact that peers gossip to each other about which messages they have seen and use this ... Jan 18, 2022 ... Publish-Subscribe. NATS implements a publish-subscribe message distribution model for one-to-many communication. A publisher sends a message on ... Sep 16, 2016 ... The PUBLISH command allows a procedure (or widget) to fire an event (named event) that will be received by other procedures "interested" ( ... ESP32 MQTT – Publish and Subscribe with Arduino IDE. This project shows how to use MQTT communication protocol with the ESP32 to publish messages and subscribe ... The XMPP publish-subscribe extension defined in this document provides a framework for a wide variety of applications, including news feeds, content ... May 19, 2022 ... Publish-Subscribe provides mechanisms for removing interest in a topic through the central broker, while Observer does not.