Added 'nodeArchiveService' bean

- Added tests around transaction visibility
 - TODO: Need to set the owner of archived and restored nodes


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2786 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/security/authentication/AuthenticationServiceImpl.java

@@ -109,6 +109,11 @@ public class AuthenticationServiceImpl implements AuthenticationService
             throw ae;
         }
     }
+    
+    public boolean authenticationExists(String userName)
+    {
+        return authenticationDao.userExists(userName);
+    }
 
     public String getCurrentUserName() throws AuthenticationException
     {

source/java/org/alfresco/repo/security/authentication/ChainingAuthenticationServiceImpl.java

@@ -180,7 +180,19 @@ public class ChainingAuthenticationServiceImpl implements AuthenticationService
             }
         }
         throw new AuthenticationException("Guest authentication not supported");
+    }
 
+    public boolean authenticationExists(String userName)
+    {
+        for (AuthenticationService authService : getUsableAuthenticationServices())
+        {
+            if (authService.authenticationExists(userName))
+            {
+                return true;
+            }
+        }
+        // it doesn't exist in any of the authentication components
+        return false;
     }
 
     public String getCurrentUserName() throws AuthenticationException

source/java/org/alfresco/repo/security/authentication/TestAuthenticationServiceImpl.java

@@ -230,6 +230,11 @@ public class TestAuthenticationServiceImpl implements AuthenticationService
         }
     }
 
+    public boolean authenticationExists(String userName)
+    {
+        return userNamesAndPasswords.containsKey(userName);
+    }
+
     public String getCurrentUserName() throws AuthenticationException
     {
         Context context = ContextHolder.getContext();