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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 provides documentation for the \u003ccode\u003ePublisherConnection\u003c/code\u003e class in the Google Cloud Pub/Sub C++ library, detailing its role in connecting to the Cloud Pub/Sub service for publishing events.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ePublisherConnection\u003c/code\u003e class defines pure-virtual methods that correspond to the user-facing overloads in the \u003ccode\u003ePublisher\u003c/code\u003e class, enabling the injection of custom behavior for testing purposes.\u003c/p\u003e\n"],["\u003cp\u003eThe content provides a list of past versions, from 2.11.0 to 2.37.0-rc, with links to their respective documentation pages, with the latest version being 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe webpage details the interface for \u003ccode\u003ePublisherConnection\u003c/code\u003e functions \u003ccode\u003ePublish\u003c/code\u003e, \u003ccode\u003eFlush\u003c/code\u003e, and \u003ccode\u003eResumePublish\u003c/code\u003e, including parameter types and return values, to publish, flush and resume publishing events.\u003c/p\u003e\n"],["\u003cp\u003eLightweight structures, like the \u003ccode\u003e*Params\u003c/code\u003e nested classes are used for arguments in member functions, to avoid breaking derived classes if the arguments change.\u003c/p\u003e\n"]]],[],null,[]]
