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https://issues.apache.org/jira/browse/SHIRO-344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13235844#comment-13235844
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Dan Finkelstein commented on SHIRO-344:
---------------------------------------
When trying to upgrade to 1.2, I came across a similar issue. Hopefully, this
will help track down the issue.
My app invokes runAs() on a subject (so that an admin can become a user).
Then, later when the subject wishes revert to "as before", I invoke
releaseRunAs() but it has no effect under 1.2. The subject remains unchanged.
> runAs feature doesn't work
> --------------------------
>
> Key: SHIRO-344
> URL: https://issues.apache.org/jira/browse/SHIRO-344
> Project: Shiro
> Issue Type: Bug
> Components: Realms
> Affects Versions: 1.2.0
> Reporter: yourik
> Labels: principal,, shiro,, subject
> Fix For: 1.2.1
>
>
> Right after SecurityUtils.getSubject().runAs(new new
> SimplePrincipalCollection(){...})
> SecurityUtils.getSubject().getPrincipal() returns correct new Principal
> SecurityUtils.getSubject()..getPreviousPrincipals() returns correct original
> Principal
> but DefaultSubjectDAO merge principals in method
> protected void mergePrincipals(Subject subject) {
> PrincipalCollection currentPrincipals = subject.getPrincipals();
> ...
> if (session == null) {
> ...
> } else {
> PrincipalCollection existingPrincipals = (PrincipalCollection)
> session.getAttribute(DefaultSubjectContext.PRINCIPALS_SESSION_KEY);
> if (CollectionUtils.isEmpty(currentPrincipals)) {
> ...
> } else {
> if (!currentPrincipals.equals(existingPrincipals)) {
>
> session.setAttribute(DefaultSubjectContext.PRINCIPALS_SESSION_KEY,
> currentPrincipals);
> }
> }
> }
> and after that
> SecurityUtils.getSubject().getPrincipal() and
> SecurityUtils.getSubject().getPreviousPrincipals() both returns new Principal
> - this is wrong behavior
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