A connection to the Cloud Pub/Sub service to publish events.
This interface defines pure-virtual methods for each of the user-facing overload sets in Publisher. That is, all of Publisher's overloads will forward to the one pure-virtual method declared in this interface. This allows users to inject custom behavior (e.g., with a Google Mock object) in a Publisher object for use in their own tests.
To create a concrete instance that connects you to the real Cloud Pub/Sub service, see MakePublisherConnection().
The *Params nested classes
Applications may define classes derived from PublisherConnection, 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.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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\u003ePublisherConnection\u003c/code\u003e interface for the Google Cloud Pub/Sub C++ library, focusing on its role in publishing events and defining pure-virtual methods.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ePublisherConnection\u003c/code\u003e interface enables users to inject custom behavior into a \u003ccode\u003ePublisher\u003c/code\u003e object, like using a mock object for testing purposes.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eMakePublisherConnection()\u003c/code\u003e is used to make a real connection with the Cloud Pub/Sub service.\u003c/p\u003e\n"],["\u003cp\u003eThe document lists multiple previous version numbers, all the way down to 2.11.0, and including 2.37.0-rc as the latest version.\u003c/p\u003e\n"],["\u003cp\u003eThe interface defines functions such as \u003ccode\u003ePublish\u003c/code\u003e, \u003ccode\u003eFlush\u003c/code\u003e, and \u003ccode\u003eResumePublish\u003c/code\u003e, which correspond to methods in the \u003ccode\u003ePublisher\u003c/code\u003e class, and have structures that pass the arguments.\u003c/p\u003e\n"]]],[],null,[]]
