codaland
Monday, September 16, 2002
       
Object Prevalence
All commands received from the system's clients are converted into serializable objects by the server. Before being applied to the business objects, each command is serialized and written to a log file. During crash recovery, first, the system retrieves its last saved state from the snapshot file. Then, it reads the commands from the log files created since the snapshot was taken. These commands are simply applied to the business objects exactly as if they had just come from the system's clients. The system is then back in the state it was just before the crash and is ready to run.
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