protected AuthenticationInfo doMultiRealmAuthentication()

in core/src/main/java/org/apache/shiro/authc/pam/ModularRealmAuthenticator.java [200:246]

33 lines of code
7 McCabe index (conditional complexity)


    protected AuthenticationInfo doMultiRealmAuthentication(Collection<Realm> realms, AuthenticationToken token) {

        AuthenticationStrategy strategy = getAuthenticationStrategy();

        AuthenticationInfo aggregate = strategy.beforeAllAttempts(realms, token);

        if (LOGGER.isTraceEnabled()) {
            LOGGER.trace("Iterating through {} realms for PAM authentication", realms.size());
        }

        for (Realm realm : realms) {

            try {
                aggregate = strategy.beforeAttempt(realm, token, aggregate);
            } catch (ShortCircuitIterationException shortCircuitSignal) {
                // Break from continuing with subsequent realms on receiving
                // short circuit signal from strategy
                break;
            }

            if (realm.supports(token)) {

                LOGGER.trace("Attempting to authenticate token [{}] using realm [{}]", token, realm);

                AuthenticationInfo info = null;
                Throwable t = null;
                try {
                    info = realm.getAuthenticationInfo(token);
                } catch (Throwable throwable) {
                    t = throwable;
                    if (LOGGER.isDebugEnabled()) {
                        String msg = "Realm [" + realm + "] threw an exception during a multi-realm authentication attempt:";
                        LOGGER.debug(msg, t);
                    }
                }

                aggregate = strategy.afterAttempt(realm, token, info, aggregate, t);

            } else {
                LOGGER.debug("Realm [{}] does not support token {}.  Skipping realm.", realm, token);
            }
        }

        aggregate = strategy.afterAllAttempts(token, aggregate);

        return aggregate;
    }