Cluster event notification system

Details Cluster event notification system Cluster event notification system

2006-06-06

2006-06-06

Thomson, William (Department: 2194)

Electrical computers and digital processing systems: interprogra

Event handling or event notification

C714S001000, C714S002000, C714S004110, C714S100000, C709S223000

Reexamination Certificate

active

07058957

ABSTRACT:
A method for notifying events to a node in a cluster includes (1) receiving a first event message and a second event message, (2) queuing the first and the second event messages, (3) sending the first event message to a first service callback, wherein the first service callback calls a first callback function to handle the first event message, (4) sending the first event message to a second service callback after (a) a the first service callback has handled the first event message and (b) a corresponding first service callback at a member node has handled the first event message, wherein the second service callback calls a second callback function to handle the first event message, and (5) sending the second event message to the first service callback after the first and the second callback functions have handled the first event message, wherein the first service callback calls the first callback function to handle the second event message. The method may further include sending a dummy message to the first callback function if the first callback function is waiting for a message from a sending node that is down. The method may also include sending a node down message to the first callback function if the first callback function is sending a message to a receiving node that is down.

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