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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 page 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 latest release candidate for the \u003ccode\u003eSubscriberConnection\u003c/code\u003e class is version 2.37.0-rc, with historical versions also being made available for viewing up to 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eSubscriberConnection\u003c/code\u003e allows for the injection of custom behavior, and is used for classes wanting to mock the connection.\u003c/p\u003e\n"],["\u003cp\u003eThe class includes virtual functions such as \u003ccode\u003eSubscribe\u003c/code\u003e, \u003ccode\u003eExactlyOnceSubscribe\u003c/code\u003e, \u003ccode\u003ePull\u003c/code\u003e, and \u003ccode\u003eoptions\u003c/code\u003e, providing control over subscription, pulling, and configuration.\u003c/p\u003e\n"],["\u003cp\u003eTo create a live connection to Cloud Pub/Sub, users can refer to the \u003ccode\u003eMakeSubscriberConnection()\u003c/code\u003e function.\u003c/p\u003e\n"]]],[],null,[]]
