#include <mongocxx/v_noabi/mongocxx/pool.hpp>

Description

A pool of client objects associated with a MongoDB deployment.

For interoperability with other MongoDB drivers, the minimum and maximum number of connections in the pool is configured using the 'minPoolSize' and 'maxPoolSize' connection string options.

See also

https://www.mongodb.com/docs/manual/reference/connection-string/#connection-string-options

Remarks: When connecting to a replica set, it is much more efficient to use a pool as opposed to manually constructing client objects. The pool will use a single background thread per server to monitor the topology of the replica set, all of which are shared between the client objects created by the pool. A standalone client will instead "stop the world" every 60 seconds to check the status of the cluster. Because of this, if multiple threads are available, a connection pool should be used even if the application itself is single-threaded.

Classes
class	entry
	An entry is a handle on a `client` object acquired via the pool. Similar to std::unique_ptr. More...

Public Member Functions
	pool (const uri &mongodb_uri=mongocxx::v_noabi::uri(), const options::pool &options=options::pool())
	Creates a pool associated with a connection string.

	~pool ()
	Destroys a pool.

entry	acquire ()
	Acquires a client from the pool. The calling thread will block until a connection is available.

bsoncxx::v_noabi::stdx::optional< entry >	try_acquire ()
	Acquires a client from the pool. This method will return immediately, but may return a disengaged optional if a client is not available.

Constructor & Destructor Documentation

◆ pool()

mongocxx::v_noabi::pool::pool	(	const uri &	mongodb_uri = mongocxx::v_noabi::uri(),
		const options::pool &	options = options::pool() )

explicit

Creates a pool associated with a connection string.

Parameters

mongodb_uri	A MongoDB URI representing the connection parameters
options	Options to use when connecting to the MongoDB deployment.

Exceptions

mongocxx::v_noabi::exception if invalid options are provided (whether from the URI or provided client options).

◆ ~pool()

mongocxx::v_noabi::pool::~pool ( )

Destroys a pool.

Member Function Documentation

◆ acquire()

entry mongocxx::v_noabi::pool::acquire ( )

Acquires a client from the pool. The calling thread will block until a connection is available.

◆ try_acquire()

bsoncxx::v_noabi::stdx::optional< entry > mongocxx::v_noabi::pool::try_acquire ( )

Acquires a client from the pool. This method will return immediately, but may return a disengaged optional if a client is not available.

The documentation for this class was generated from the following file:

mongocxx/v_noabi/mongocxx/pool.hpp