class QMqttConnectionProperties

The QMqttConnectionProperties class represents configuration options a QMqttClient can pass to the server when invoking connectToHost() . More

Inherited by: QMqttServerConnectionProperties

Synopsis

Methods

Note

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Detailed Description

Note

Connection properties are part of the MQTT 5.0 specification and cannot be used when connecting with a lower protocol level. See ProtocolVersion for more information.

__init__()
__init__(arg__1)
Parameters:

arg__1QMqttConnectionProperties

authenticationData()
Return type:

QByteArray

Returns the authentication data.

authenticationMethod()
Return type:

str

Returns the authentication method.

maximumPacketSize()
Return type:

int

Returns the maximum packet size the client can receive.

maximumReceive()
Return type:

int

Returns the maximum amount of QoS 1 and QoS 2 publications that the client (when obtained from connectionProperties() ) or the server (when obtained from serverConnectionProperties() ) is willing to process concurrently for this session.

maximumTopicAlias()
Return type:

int

Returns the maximum topic alias ID the client can use.

requestProblemInformation()
Return type:

bool

Returns whether the client should receive problem information.

requestResponseInformation()
Return type:

bool

Returns whether the client should receive response information.

sessionExpiryInterval()
Return type:

int

Returns the session expiry interval.

setAuthenticationData(authData)
Parameters:

authDataQByteArray

Sets the authentication data to authData.

Authentication data can only be used if an authentication method has been specified.

setAuthenticationMethod(authMethod)
Parameters:

authMethod – str

Sets the authentication method to authMethod.

setMaximumPacketSize(packetSize)
Parameters:

packetSize – int

Sets the maximum packet size to packetSize. The maximum packet size specifies the maximum size one packet can contain. This includes the packet header and its properties.

If no maximum packet size is specified, no limit is imposed beyond the limitations of the protocol itself.

setMaximumReceive(maximumReceive)
Parameters:

maximumReceive – int

Sets the maximum amount of QoS 1 and QoS 2 publications that the client is willing to process concurrently for this session to maximumReceive.

A maximum receive value of 0 is not allowed.

See also

maximumReceive()

setMaximumTopicAlias(alias)
Parameters:

alias – int

Sets the maximum topic alias to alias. The maximum topic alias specifies the highest value that the client will accept from the server. The client uses this value to limit the number of topic aliases it is willing to hold for the connection.

The default value is 0. 0 indicates that the client does not accept any topic aliases on this connection.

setRequestProblemInformation(problem)
Parameters:

problem – bool

Sets the request problem information to problem. A client uses this to request the server to return additional information in case of failure. Types of failure include connection and message management on the server side.

The default value is false, which indicates that the client must not receive any problem information for anything but connection management. The server still may send problem information for connection handling. If the value is true, the server may return problem information.

Problem information is available in user properties or reason strings of the property classes.

setRequestResponseInformation(response)
Parameters:

response – bool

Sets the request response information to response. A client uses this to request the server to return response information after the connection request has been handled.

The default value is false, which indicates that the client must not return any response information. If the value is true, the server may return response information, but is not enforced to do so.

setSessionExpiryInterval(expiry)
Parameters:

expiry – int

Sets the session expiry interval to expiry. The session expiry interval specifies the number of seconds a server holds information on the client state after a connection has been closed.

The default value is 0, which specifies that the session is closed when the network connection ends. If the value is specified as maximum of quint32, then the session does not expire.

setUserProperties(properties)
Parameters:

propertiesQMqttUserProperties

Sets the user properties of the connection to properties.

The default value is to not send any user information.

See also

userProperties()

userProperties()
Return type:

QMqttUserProperties

Returns the user properties for the connection.