both spring authentication provider and authentication processing filter also need to register with authenticationManager?
authentication provider i can use custom-authentication-provider tag
but what is different spring authentication provider and authentication processing filter ?
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The authentication processing filter just adds a token (username password).
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Other filters add tokens too.
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For example the AnonymousProcessingFilter..
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The idea is to seperate token generation from token authentication.
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That way you could implement stuff like authentication against multiple sources easily..
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The regular case is one provider per token generator..