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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 details the \u003ccode\u003eSubscriberConnection\u003c/code\u003e class within the Google Cloud Pub/Sub C++ library, focusing on its role in receiving events from the service.\u003c/p\u003e\n"],["\u003cp\u003eThis interface utilizes pure-virtual functions, which mirror the overload sets found in the \u003ccode\u003eSubscriber\u003c/code\u003e class, allowing for custom behavior to be injected for testing.\u003c/p\u003e\n"],["\u003cp\u003eA concrete connection to the real Cloud Pub/Sub service can be created using the \u003ccode\u003eMakeSubscriberConnection()\u003c/code\u003e function.\u003c/p\u003e\n"],["\u003cp\u003eThe page provides a list of \u003ccode\u003eSubscriberConnection\u003c/code\u003e versions, starting from the latest release candidate 2.37.0-rc down to version 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eSubscriberConnection\u003c/code\u003e 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, with details provided on their parameters and return types.\u003c/p\u003e\n"]]],[],null,[]]
