Improvements to cold permission performance and caching.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5247 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/security/permissions/impl/PermissionServiceImpl.java

@@ -20,7 +20,7 @@
  * and Open Source Software ("FLOSS") applications as described in Alfresco's 
  * FLOSS exception.  You should have recieved a copy of the text describing 
  * the FLOSS exception, and it is also available here: 
- * http://www.alfresco.com/legal/licensing"
+ * http://www.alfresco.com/legal/licensing
  */
 package org.alfresco.repo.security.permissions.impl;
 
@@ -61,17 +61,15 @@ import org.apache.commons.logging.LogFactory;
 import org.springframework.beans.factory.InitializingBean;
 
 /**
- * The Alfresco implementation of a permissions service against our APIs for the
- * permissions model and permissions persistence.
+ * The Alfresco implementation of a permissions service against our APIs for the permissions model and permissions persistence.
  * 
  * @author andyh
  */
 public class PermissionServiceImpl implements PermissionServiceSPI, InitializingBean
 {
 
-    static SimplePermissionReference OLD_ALL_PERMISSIONS_REFERENCE = new SimplePermissionReference(
-            QName.createQName("", PermissionService.ALL_PERMISSIONS),
-            PermissionService.ALL_PERMISSIONS);
+    static SimplePermissionReference OLD_ALL_PERMISSIONS_REFERENCE = new SimplePermissionReference(QName.createQName(
+            "", PermissionService.ALL_PERMISSIONS), PermissionService.ALL_PERMISSIONS);
 
     private static Log log = LogFactory.getLog(PermissionServiceImpl.class);
 
@@ -205,7 +203,7 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
         {
             throw new IllegalArgumentException("Property 'authenticationComponent' has not been set");
         }
-        if(authorityService == null)
+        if (authorityService == null)
         {
             throw new IllegalArgumentException("Property 'authorityService' has not been set");
         }
@@ -218,7 +216,8 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
             throw new IllegalArgumentException("Property 'policyComponent' has not been set");
         }
 
-        policyComponent.bindClassBehaviour(QName.createQName(NamespaceService.ALFRESCO_URI, "onMoveNode"), ContentModel.TYPE_BASE, new JavaBehaviour(this, "onMoveNode"));
+        policyComponent.bindClassBehaviour(QName.createQName(NamespaceService.ALFRESCO_URI, "onMoveNode"),
+                ContentModel.TYPE_BASE, new JavaBehaviour(this, "onMoveNode"));
 
     }
 
@@ -320,8 +319,7 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
         @Override
         public String toString()
         {
-            return accessStatus + " " + this.permission + " - " +
-                   this.authority + " (" + this.authorityType + ")";
+            return accessStatus + " " + this.permission + " - " + this.authority + " (" + this.authorityType + ")";
         }
 
         @Override
@@ -397,17 +395,12 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
             return AccessStatus.ALLOWED;
         }
 
-        
-        
         // Get the current authentications
         // Use the smart authentication cache to improve permissions performance
         Authentication auth = authenticationComponent.getCurrentAuthentication();
         Set<String> authorisations = getAuthorisations(auth, nodeRef);
 
-        Serializable key = generateKey(
-                authorisations,
-                nodeRef,
-                perm);
+        Serializable key = generateKey(authorisations, nodeRef, perm, CacheType.HAS_PERMISSION);
         AccessStatus status = accessCache.get(key);
         if (status != null)
         {
@@ -436,8 +429,7 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
         //
 
         /*
-         * Does the current authentication have the supplied permission on the
-         * given node.
+         * Does the current authentication have the supplied permission on the given node.
          */
 
         QName typeQname = nodeService.getType(nodeRef);
@@ -461,18 +453,22 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
         return status;
     }
 
+    enum CacheType
+    {
+        HAS_PERMISSION, SINGLE_PERMISSION, SINGLE_PERMISSION_GLOBAL;
+    }
+
     /**
-     * Key for a cache object is built from all the known Authorities (which can
-     * change dynamically so they must all be used) the NodeRef ID and the
-     * permission reference itself. This gives a unique key for each permission
-     * test.
+     * Key for a cache object is built from all the known Authorities (which can change dynamically so they must all be used) the NodeRef ID and the permission reference itself.
+     * This gives a unique key for each permission test.
      */
-    static Serializable generateKey(Set<String> auths, NodeRef nodeRef, PermissionReference perm)
+    static Serializable generateKey(Set<String> auths, NodeRef nodeRef, PermissionReference perm, CacheType type)
     {
         LinkedHashSet<Serializable> key = new LinkedHashSet<Serializable>();
         key.add(perm.toString());
         key.addAll(auths);
         key.add(nodeRef);
+        key.add(type);
         return key;
     }
 
@@ -584,7 +580,6 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
         return permissionsDaoComponent.getInheritParentPermissions(nodeRef);
     }
 
-    
     public PermissionReference getPermissionReference(QName qname, String permissionName)
     {
         return modelDAO.getPermissionReference(qname, permissionName);
@@ -866,22 +861,33 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
 
         public boolean hasSinglePermission(Set<String> authorisations, NodeRef nodeRef)
         {
+            Serializable key = generateKey(
+                    authorisations,
+                    nodeRef,
+                    this.required, CacheType.SINGLE_PERMISSION_GLOBAL);
+            
+            AccessStatus status = accessCache.get(key);
+            if (status != null)
+            {
+                return status == AccessStatus.ALLOWED;
+            }
+            
             // Check global permission
 
             if (checkGlobalPermissions(authorisations))
             {
+                accessCache.put(key, AccessStatus.ALLOWED);
                 return true;
             }
 
             Set<Pair<String, PermissionReference>> denied = new HashSet<Pair<String, PermissionReference>>();
 
-            // Keep track of permission that are denied
+            return hasSinglePermission(authorisations, nodeRef, denied);
                  
-            // Permissions are only evaluated up the primary parent chain
-            // TODO: Do not ignore non primary permissions
-            ChildAssociationRef car = nodeService.getPrimaryParent(nodeRef);
-            // Work up the parent chain evaluating permissions.
-            while (car != null)
+        }
+
+        public boolean hasSinglePermission(Set<String> authorisations, NodeRef nodeRef,
+                Set<Pair<String, PermissionReference>> denied)
         {
             // Add any denied permission to the denied list - these can not
             // then
@@ -891,39 +897,78 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
             // to
             // andy at node A has no effect
 
-                denied.addAll(getDenied(car.getChildRef()));
+            denied.addAll(getDenied(nodeRef));
+
+            // Cache non denied
+            Serializable key = null;
+            if (denied.size() == 0)
+            {
+                key = generateKey(authorisations, nodeRef, this.required, CacheType.SINGLE_PERMISSION);
+            }
+            if (key != null)
+            {
+                AccessStatus status = accessCache.get(key);
+                if (status != null)
+                {
+                    return status == AccessStatus.ALLOWED;
+                }
+            }
 
             // If the current node allows the permission we are done
             // The test includes any parent or ancestor requirements
-                if (checkRequired(authorisations, car.getChildRef(), denied))
+            if (checkRequired(authorisations, nodeRef, denied))
             {
+                if (key != null)
+                {
+                    accessCache.put(key, AccessStatus.ALLOWED);
+                }
                 return true;
             }
 
+            // Permissions are only evaluated up the primary parent chain
+            // TODO: Do not ignore non primary permissions
+            ChildAssociationRef car = nodeService.getPrimaryParent(nodeRef);
+
             // Build the next element of the evaluation chain
             if (car.getParentRef() != null)
             {
-                    NodePermissionEntry nodePermissions = permissionsDaoComponent.getPermissions(car.getChildRef());
+                NodePermissionEntry nodePermissions = permissionsDaoComponent.getPermissions(nodeRef);
                 if ((nodePermissions == null) || (nodePermissions.inheritPermissions()))
                 {
-                        car = nodeService.getPrimaryParent(car.getParentRef());
+                    if(hasSinglePermission(authorisations, car.getParentRef(), denied))
+                    {
+                        if (key != null)
+                        {
+                            accessCache.put(key, AccessStatus.ALLOWED);
+                        }
+                        return true;
                     }
                     else
                     {
-                        car = null;
-                    }
-                }
-                else
+                        if (key != null)
                         {
-                    car = null;
+                            accessCache.put(key, AccessStatus.DENIED);
                         }
-
-            }
-
-            // TODO: Support meta data permissions on the root node?
-
                         return false;
-
+                    }
+                }
+                else
+                {
+                    if (key != null)
+                    {
+                        accessCache.put(key, AccessStatus.DENIED);
+                    }
+                    return false;
+                }
+            }
+            else
+            {
+                if (key != null)
+                {
+                    accessCache.put(key, AccessStatus.DENIED);
+                }
+                return false;
+            }
         }
 
         /**
@@ -982,7 +1027,8 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
 
                         // All permission excludes all permissions available for
                         // the node.
-                        if (pe.getPermissionReference().equals(getAllPermissionReference()) || pe.getPermissionReference().equals(OLD_ALL_PERMISSIONS_REFERENCE))
+                        if (pe.getPermissionReference().equals(getAllPermissionReference())
+                                || pe.getPermissionReference().equals(OLD_ALL_PERMISSIONS_REFERENCE))
                         {
                             for (PermissionReference deny : modelDAO.getAllPermissions(nodeRef))
                             {

source/java/org/alfresco/repo/security/permissions/impl/model/PermissionModel.java

@@ -20,12 +20,13 @@
  * and Open Source Software ("FLOSS") applications as described in Alfresco's 
  * FLOSS exception.  You should have recieved a copy of the text describing 
  * the FLOSS exception, and it is also available here: 
- * http://www.alfresco.com/legal/licensing"
+ * http://www.alfresco.com/legal/licensing
  */
 package org.alfresco.repo.security.permissions.impl.model;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.Serializable;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -728,18 +729,43 @@ public class PermissionModel implements ModelDAO, InitializingBean
         return pg;
     }
     
+    static Serializable generateKey(PermissionReference required, QName qName, Set<QName> aspectQNames,
+            RequiredPermission.On on)
+    {
+        LinkedHashSet<Serializable> key = new LinkedHashSet<Serializable>();
+        key.add(required.toString());
+        key.add(qName);
+        key.addAll(aspectQNames);
+        key.add(on.toString());
+        return key;
+    }
+
+
+    private HashMap<Serializable, Set<PermissionReference>> requiredPermissionsCache = new HashMap<Serializable, Set<PermissionReference>>(
+            1024);
+
     public Set<PermissionReference> getRequiredPermissions(PermissionReference required, QName qName,
             Set<QName> aspectQNames, RequiredPermission.On on)
+    {
+        // Cache lookup as this is static
+
+        Serializable key = generateKey(required, qName, aspectQNames, on);
+
+        Set<PermissionReference> answer = requiredPermissionsCache.get(key);
+        if (answer == null)
         {
             PermissionGroup pg = getBasePermissionGroupOrNull(getPermissionGroupOrNull(required));
             if (pg == null)
             {
-            return getRequirementsForPermission(required, on);
+                answer = getRequirementsForPermission(required, on);
             }
             else
             {
-            return getRequirementsForPermissionGroup(pg, on, qName, aspectQNames);
+                answer = getRequirementsForPermissionGroup(pg, on, qName, aspectQNames);
             }
+            requiredPermissionsCache.put(key, answer);
+        }
+        return answer;
     }
 
     /**