To use the C++ driver, you must first create an instance of the mongocxx::instance class. This instance performs the following functions in your application:
Initializes and shuts down the C++ driver
Initializes driver dependencies
Ensures the driver functions correctly
Manages the lifetimes of resources that are shared among mongocxx::client objects, such as the connection pool and BSON library
This guide shows you how to create a mongocxx::instance object.
To create a mongocxx::instance object, include the mongocxx/instance.hpp header file in your application. Then, construct an instance of mongocxx::instance at the start of your application, as shown in the following example:
#include <mongocxx/instance.hpp>int main(){ mongocxx::instance instance;}You must create a mongocxx::instance object before you use the C++ driver, and this object must remain alive for as long as any other MongoDB objects are in scope.
To learn more about the mongocxx::instance class in the C++ driver, see the following API documentation:
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