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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 latest version available is 2.37.0-rc, with numerous previous versions of the Pub/Sub PublisherConnection class documented, down to 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003ePublisherConnection serves as an interface with pure-virtual methods that define the behavior for publishing events to the Cloud Pub/Sub service, mirroring the overloads found in the Publisher class.\u003c/p\u003e\n"],["\u003cp\u003eCustom behavior can be injected into a Publisher object using a PublisherConnection for testing, such as with a Google Mock object.\u003c/p\u003e\n"],["\u003cp\u003eThe class includes virtual methods like \u003ccode\u003ePublish\u003c/code\u003e, \u003ccode\u003eFlush\u003c/code\u003e, and \u003ccode\u003eResumePublish\u003c/code\u003e, each with corresponding Params classes for passing arguments to avoid breaking derived classes when changing parameters.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eMakePublisherConnection()\u003c/code\u003e will connect a concrete instance to the real Cloud Pub/Sub service.\u003c/p\u003e\n"]]],[],null,[]]
