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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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\u003eThis document details the \u003ccode\u003eSubscriberConnection\u003c/code\u003e class, which serves as an interface for connecting to the Cloud Pub/Sub service to receive events, using version 2.36.0 as the current version.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eSubscriberConnection\u003c/code\u003e class defines pure-virtual functions that mirror the overload sets in the \u003ccode\u003eSubscriber\u003c/code\u003e class, enabling users to inject custom behavior, such as with Google Mock objects.\u003c/p\u003e\n"],["\u003cp\u003eThe document describes how to create a live connection to Cloud Pub/Sub using the \u003ccode\u003eMakeSubscriberConnection()\u003c/code\u003e function.\u003c/p\u003e\n"],["\u003cp\u003eThe document explains how to use \u003ccode\u003e*Params\u003c/code\u003e nested classes which can be used to pass arguments, and can also be used to prevent breaking user created derived classes when changes are made.\u003c/p\u003e\n"],["\u003cp\u003eThe interface has functions such as \u003ccode\u003eSubscribe\u003c/code\u003e, \u003ccode\u003eExactlyOnceSubscribe\u003c/code\u003e, \u003ccode\u003ePull\u003c/code\u003e and \u003ccode\u003eoptions\u003c/code\u003e which are used to interact with the pubsub service, with descriptions of each.\u003c/p\u003e\n"]]],[],null,[]]
