Grokking Spring Boot
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The Bean Lifecycle

These lines come from one run of the booking service. A test started the application, sent one confirmation email, and then closed the application:

EmailSender: constructor called, clock is null
EmailSender: clock injected
EmailSender: @PostConstruct, ready to send through mail.example.com
Notifier: constructor called
Notifier: @PostConstruct
---- context ready, using Notifier
EmailSender: email to ana@example.com: Seat A12 is yours
---- closing context
Notifier: @PreDestroy
EmailSender: @PreDestroy, closed

Two details in this log matter

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