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"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-14 UTC."],[[["This document details the `SubscriberConnection` interface, which facilitates receiving events from the Cloud Pub/Sub service in C++."],["It presents a list of available versions of the `SubscriberConnection` class, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc, and down to 2.26.0, with each version being accessible via a direct link."],["The `SubscriberConnection` interface includes pure-virtual functions that correspond to overloads in the `Subscriber` class, allowing for the injection of custom behavior, such as with mock objects."],["The class defines virtual functions such as `Subscribe`, `ExactlyOnceSubscribe`, and `Pull`, with each having specific parameter and return type information, to define how the `Subscriber` interacts with the service."],["`SubscriberConnection` utilizes nested classes like `SubscribeParams` and `ExactlyOnceSubscribeParams` to manage the arguments passed to member functions and avoid breaking derived classes when changes occur."]]],[]]
