How SpringServletContainerInitializer is bootstrapped during Spring initialization? -

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i'm using webapplicationinitializer-approach initialization of spring's webapplicationcontext. official documentation webapplicationinitializer:

implementations of spi detected automatically springservletcontainerinitializer, bootstrapped automatically servlet 3.0 container

the question how springservletcontainerinitializer 'bootstrapped automatically'?

as per doc springservletcontainerinitializer implements servletcontainerinitializer.

implementations of servletcontainerinitializer notified servlet 3.0-compliant container during container startup. that's contract of servlet3.0 complaint container.

doc servletcontainerinitializer can seen here

doc how bootstrapped here


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