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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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\u003eThe webpage details the \u003ccode\u003ePublisherConnection\u003c/code\u003e class for Google Cloud Pub/Sub, providing access to a variety of versions, starting from 2.11.0 up to the latest release candidate 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003ePublisherConnection\u003c/code\u003e defines pure-virtual methods that correspond to the user-facing overload sets in the \u003ccode\u003ePublisher\u003c/code\u003e class, which enables custom behaviors for testing, such as mocking.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ePublisherConnection\u003c/code\u003e interface includes functions like \u003ccode\u003ePublish\u003c/code\u003e, \u003ccode\u003eFlush\u003c/code\u003e, and \u003ccode\u003eResumePublish\u003c/code\u003e, each accepting a \u003ccode\u003e*Params\u003c/code\u003e object to specify their arguments.\u003c/p\u003e\n"],["\u003cp\u003eThe class allows for the creation of concrete instances that connect to the real Cloud Pub/Sub service through the use of the \u003ccode\u003eMakePublisherConnection()\u003c/code\u003e function.\u003c/p\u003e\n"],["\u003cp\u003eApplications can create derived classes of \u003ccode\u003ePublisherConnection\u003c/code\u003e to mock the class, with lightweight structures defining the arguments for member functions to avoid breaking these derived classes with new changes.\u003c/p\u003e\n"]]],[],null,[]]
