A connection to the Cloud Pub/Sub service to receive events.
This interface defines pure-virtual functions for each of the user-facing overload sets in Subscriber. That is, all of Subscriber's overloads will forward to the one pure-virtual function declared in this interface. This allows users to inject custom behavior (e.g., with a Google Mock object) in a Subscriber object for use in their own tests.
To create a concrete instance that connects you to the real Cloud Pub/Sub service, see MakeSubscriberConnection().
The *Params nested classes
Applications may define classes derived from SubscriberConnection, for example, because they want to mock the class. To avoid breaking all such derived classes when we change the number or type of the arguments to the member functions we define lightweight structures to pass the arguments.
Functions
virtual Subscribe(SubscribeParams)
Defines the interface for Subscriber::Subscribe(ApplicationCallback)
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThe webpage documents the \u003ccode\u003eSubscriberConnection\u003c/code\u003e class, which provides an interface for connecting to the Cloud Pub/Sub service to receive events.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eSubscriberConnection\u003c/code\u003e class contains pure-virtual functions that forward calls from the \u003ccode\u003eSubscriber\u003c/code\u003e class, allowing for custom behavior injection, such as testing with mock objects.\u003c/p\u003e\n"],["\u003cp\u003eThis interface defines functions for subscribing to messages, with methods such as \u003ccode\u003eSubscribe\u003c/code\u003e and \u003ccode\u003eExactlyOnceSubscribe\u003c/code\u003e, as well as the ability to pull and retrieve messages and also contains functions for managing configuration.\u003c/p\u003e\n"],["\u003cp\u003eThe page details various versions of the \u003ccode\u003eSubscriberConnection\u003c/code\u003e class, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc, and it states that the current version on display is 2.20.0.\u003c/p\u003e\n"]]],[],null,[]]
