33 lines
933 B
Racket
33 lines
933 B
Racket
#lang syndicate
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;; Shows the difference between a supervised exit and a supervised crash.
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(require/activate syndicate/supervise)
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(require/activate syndicate/drivers/timestate)
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(supervise
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#:name 'ward-supervisor
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(spawn #:name 'ward
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(on-start (log-info "Starting ward"))
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(on-stop (log-info "Stopping ward"))
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(on (message 'crash)
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(log-info "Crashing")
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(error 'ward "Eep!"))
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(stop-when (message 'quit)
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(log-info "Bye!"))))
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(define (monitor-interest-in thing)
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(spawn #:name (list 'monitor-interest-in thing)
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(during (observe thing)
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(on-start (log-info "Interest in ~v appeared" thing))
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(on-stop (log-info "Interest in ~v disappeared" thing)))))
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(monitor-interest-in 'crash)
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(monitor-interest-in 'quit)
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(spawn* #:name 'main
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(sleep 1)
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(send! 'crash)
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(sleep 1)
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(send! 'quit)
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(sleep 1))
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