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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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.\u003c/p\u003e\n"],["\u003cp\u003eThis interface defines pure-virtual methods that correspond to the user-facing overload sets in the \u003ccode\u003ePublisher\u003c/code\u003e class, facilitating the injection of custom behavior for testing.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eMakePublisherConnection()\u003c/code\u003e function is available to create an instance that connects to the real Cloud Pub/Sub service.\u003c/p\u003e\n"],["\u003cp\u003eThe class uses lightweight structures like \u003ccode\u003ePublishParams\u003c/code\u003e and \u003ccode\u003eFlushParams\u003c/code\u003e to manage arguments for its member functions, ensuring flexibility when updating argument lists.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ePublisherConnection\u003c/code\u003e class includes virtual methods such as \u003ccode\u003ePublish\u003c/code\u003e, \u003ccode\u003eFlush\u003c/code\u003e, and \u003ccode\u003eResumePublish\u003c/code\u003e, which define the interface for corresponding methods in the \u003ccode\u003ePublisher\u003c/code\u003e class.\u003c/p\u003e\n"]]],[],null,[]]
