SEC-593: Added PermissionCacheOptimizer strategy interface and implementation in Acl module.

This is used by DefaultMethodSecurityExpressionHandler to allow permissions to be cached before repeatedly evaluating an expression for a collection of domain objects.

samples/contacts/src/main/webapp/WEB-INF/applicationContext-security.xml

@@ -52,9 +52,15 @@
 
     <b:bean id="expressionHandler" class="org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler">
         <b:property name="permissionEvaluator" ref="permissionEvaluator"/>
+        <b:property name="permissionCacheOptimizer">
+            <b:bean class="org.springframework.security.acls.AclPermissionCacheOptimizer">
+                <b:constructor-arg ref="aclService"/>
+            </b:bean>
+        </b:property>
     </b:bean>
 
     <b:bean id="permissionEvaluator" class="org.springframework.security.acls.AclPermissionEvaluator">
         <b:constructor-arg ref="aclService"/>
     </b:bean>
+
 </b:beans>

samples/contacts/src/main/webapp/WEB-INF/classes/log4j.properties

@@ -1,5 +1,5 @@
 # Global logging configuration
-log4j.rootLogger=DEBUG, stdout, fileout
+log4j.rootLogger=INFO, stdout, fileout
 
 log4j.logger.sample.contact=DEBUG
 log4j.logger.org.springframework.web.*=DEBUG