Wombat::MamaTransportCallback

Callbacks associated with MamaTransports More…

Public Functions

Detailed Description

class Wombat::MamaTransportCallback;

Callbacks associated with MamaTransports

Events that can cause one of the callbacks to be invoked vary according to the underlying middleware. The details are as follows:

All Middleware: MAMA_TRANSPORT_QUALITY is passed when an the underlying transport detects an event that may affect data quality. Depending on the event, MAMA may also mark subscriptions as STALE or MAYBE_STALE.

TIBRV: TIBRV invokes the callback with MAMA_TRANSPORT_DISCONNECT when the transport disconnects from the RV daemon and MAMA_TRANSPORT_RECONNECT when it reestablishes a connection to the daemon.

Wombat Middleware: For Wombat Middleware MAMA distinguishes between connections established from a transport to another transport and connections established by the transport from another transport. In general MAMA applications establish connection from a MAMA transport to a feed handler (publisher); however, they may also accept connections from other MAMA clients. Applications subscribe to topics and publisher messages over all connections. When a transport successfully connects to another transport (ie. a feed handler) the mamaTranpsortCallback receives MAMA_TRANSPORT_CONNECT if the connection succeeds immediately otherwise it receives a MAMA_TRANSPORT_RECONNECT if it subsequently succeeds. Wombat Middlware transports may be configured to retry failed connections. When a conection that a transport establishes to another transport (the publisher by convention) and the connection is lost the mamaTranpsortCallback receives the MAMA_TRANSPORT_PUBLISHER_DISCONNECT event. When a transport accepts a connection from a remote transport (the subscriber by convention) it receives either a MAMA_TRANSPORT_ACCEPT or MAMA_TRANSPORT_ACCEPT_RECONNECT event indicating that the remote client is connecting or reconnecting. When the client disconnects MAMA passes the MAMA_TRANSPORT_DISCONNECT value.

Public Functions Documentation

function onDisconnect

void onDisconnect(
    MamaTransport transport
)

See interface remarks for details

function onReconnect

void onReconnect(
    MamaTransport transport
)

See interface remarks for details

function onQuality

void onQuality(
    MamaTransport transport
)

Called when an event occurs which affects data quality

function onConnect

void onConnect(
    MamaTransport transport
)

Called when a subscriber connects to a publisher (Wombat Middleware) or when reconnection to an RV daemon occurs (TIBRV).

Parameters:

• transport

function onAcceptConnect

void onAcceptConnect(
    MamaTransport transport
)

Called when a publisher accepts a connection from a subscriber (Wombat Middleware).

Parameters:

• transport

function onAcceptReconnect

void onAcceptReconnect(
    MamaTransport transport
)

Called when a publisher accepts a reconnection from a subscriber (Wombat Middleware).

Parameters:

• transport

function onPublisherDisconnect

void onPublisherDisconnect(
    MamaTransport transport
)

Called when a subscriber loses connection to a publisher (Wombat Middleware).

Parameters:

• transport

function onNamingServiceConnect

void onNamingServiceConnect(
    MamaTransport transport
)

Called on connection to a NSD (Wombat Middleware).

Parameters:

• transport

function onNamingServiceDisconnect

void onNamingServiceDisconnect(
    MamaTransport transport
)

Called on disconnection to a NSD (Wombat Middleware).

Parameters:

• transport

Updated on 2023-03-31 at 15:29:33 +0100