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From Konstantin Kolinko <>
Subject Re: [PROPOSAL] Remove Realm from GenericPrincipal
Date Sun, 02 Aug 2009 19:42:53 GMT
2009/7/17 Mark Thomas <>:
> As a result of looking into
>, I discovered
> that the only use made of the Realm attribute of GenericPrincipal is to
> control whether or not a debug message is logged in RealmBase.hasRole()
> Given that the Realm is the reason that GenericPrincipal is not
> Serializable, I'd like to propose the following changes for Tomcat 7.
> 1. Remove the Realm from GenericPrincipal
> 2. Make GenericPrincipal Serializable
> 3. Take advantage of this to simplify the Cluster code
> As a by product, this should also address bug 40881 by allowing any
> Realm that uses any Serializable Principal to work with clustering.
> Thoughts?
> Mark

One more note to this:
since rev.791900 GenericPrincipal stores a reference to LoginContext,
and LoginContext is not serializable.

At least it means that that field will be transient, and probably
that issue 39231 that that commit (with some followups) fixes
won't/cannot be fixed for clusters. (I suppose so, though I may be

Best regards,
Konstantin Kolinko

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