MongoDB\Driver\Manager::selectServer
(mongodb >=1.0.0)
MongoDB\Driver\Manager::selectServer — Select a server matching a read preference
说明
final
public
MongoDB\Driver\Manager::selectServer (
MongoDB\Driver\ReadPreference
$readPreference ) :
MongoDB\Driver\Server
Selects a MongoDB\Driver\Server matching readPreference. This may be used to preselect a server in order to perform version checking before executing an operation.
Note: Unlike MongoDB\Driver\Manager::getServers(), this method will initialize database connections and perform server discovery if necessary. See the » Server Selection Specification for additional information.
参数
-
readPreference( MongoDB\Driver\ReadPreference) -
The read preference to use for selecting a server.
返回值
Returns a MongoDB\Driver\Server matching the read preference.
错误／异常
- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
- Throws MongoDB\Driver\Exception\ConnectionException if connection to the server fails (for reasons other than authentication).
- Throws MongoDB\Driver\Exception\AuthenticationException if authentication is needed and fails.
- Throws MongoDB\Driver\Exception\RuntimeException if a server matching the read preference could not be found.
参见
- MongoDB\Driver\Server
- MongoDB\Driver\Manager::getServers() - Return the servers to which this manager is connected
- » Server Selection Specification
