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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 \u003ccode\u003ePublisherConnection\u003c/code\u003e class provides an interface for connecting to the Cloud Pub/Sub service to publish events, with the latest version being \u003ccode\u003e2.37.0-rc\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThis interface utilizes pure-virtual methods that align with the overload sets found in the \u003ccode\u003ePublisher\u003c/code\u003e class, allowing for custom behavior injection.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ePublisherConnection\u003c/code\u003e class uses lightweight structures like *Params nested classes to pass arguments, ensuring that changes to function arguments don't break derived classes.\u003c/p\u003e\n"],["\u003cp\u003eIt defines the interfaces for key \u003ccode\u003ePublisher\u003c/code\u003e functions like \u003ccode\u003ePublish\u003c/code\u003e, \u003ccode\u003eFlush\u003c/code\u003e, and \u003ccode\u003eResumePublish\u003c/code\u003e, each with specific parameter types and return values.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eMakePublisherConnection()\u003c/code\u003e function can be used to create a real, concrete connection to the Cloud Pub/Sub service.\u003c/p\u003e\n"]]],[],null,[]]
