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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 webpage details the \u003ccode\u003ePublisherConnection\u003c/code\u003e interface, which facilitates interaction with the Cloud Pub/Sub service for event publishing.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003ePublisherConnection\u003c/code\u003e uses pure-virtual methods to define the interface for \u003ccode\u003ePublisher\u003c/code\u003e's overloads, allowing for custom behavior injection, particularly for testing purposes.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eMakePublisherConnection()\u003c/code\u003e function is the way to create a live connection to the actual Cloud Pub/Sub service.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003ePublisherConnection\u003c/code\u003e includes \u003ccode\u003ePublish\u003c/code\u003e, \u003ccode\u003eFlush\u003c/code\u003e, and \u003ccode\u003eResumePublish\u003c/code\u003e virtual functions, each with corresponding parameter structures for detailed control over the publication process.\u003c/p\u003e\n"],["\u003cp\u003eThe site provides documentation on the different versions of the \u003ccode\u003ePublisherConnection\u003c/code\u003e, with version 2.37.0-rc being the latest version.\u003c/p\u003e\n"]]],[],null,[]]
