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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 page details the \u003ccode\u003ePublisherConnection\u003c/code\u003e class for Cloud Pub/Sub, which serves as an interface for connecting to the service and publishing events.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ePublisherConnection\u003c/code\u003e class defines pure-virtual methods corresponding to \u003ccode\u003ePublisher\u003c/code\u003e class overloads, enabling users to inject custom behaviors in testing environments.\u003c/p\u003e\n"],["\u003cp\u003eThe class provides methods such as \u003ccode\u003ePublish\u003c/code\u003e, \u003ccode\u003eFlush\u003c/code\u003e, and \u003ccode\u003eResumePublish\u003c/code\u003e, each with a corresponding \u003ccode\u003e*Params\u003c/code\u003e class to define its input arguments, and it provides clear documentation about each functions parameters and return types.\u003c/p\u003e\n"],["\u003cp\u003eThe current page defaults to version \u003ccode\u003e2.30.0\u003c/code\u003e, but a variety of versions are available ranging from \u003ccode\u003e2.11.0\u003c/code\u003e to the latest release \u003ccode\u003e2.37.0-rc\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,[]]
