improve authentication system

scm-core/src/main/java/sonia/scm/user/User.java

@@ -59,7 +59,7 @@ import javax.xml.bind.annotation.XmlType;
 @XmlAccessorType(XmlAccessType.FIELD)
 @XmlType(propOrder =
 {
-  "name", "displayName", "mail", "password", "admin", "type"
+  "name", "displayName", "mail", "password", "admin", "type", "lastLogin"
 })
 public class User
         implements TypedObject, Principal, Cloneable, Validateable, Serializable
@@ -237,6 +237,17 @@ public class User
     return displayName;
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public long getLastLogin()
+  {
+    return lastLogin;
+  }
+
   /**
    * Method description
    *
@@ -332,6 +343,17 @@ public class User
     this.displayName = displayName;
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @param lastLogin
+   */
+  public void setLastLogin(long lastLogin)
+  {
+    this.lastLogin = lastLogin;
+  }
+
   /**
    * Method description
    *
@@ -385,6 +407,9 @@ public class User
   /** Field description */
   private String displayName;
 
+  /** Field description */
+  private long lastLogin;
+
   /** Field description */
   private String mail;
 

scm-core/src/main/java/sonia/scm/user/UserManager.java

@@ -43,4 +43,16 @@ import sonia.scm.Manager;
  * @author Sebastian Sdorra
  */
 public interface UserManager
-        extends Manager<User, UserException>, ListenerSupport<UserListener> {}
+        extends Manager<User, UserException>, ListenerSupport<UserListener>
+{
+
+  /**
+   * Method description
+   *
+   *
+   * @param username
+   *
+   * @return
+   */
+  public boolean contains(String username);
+}

scm-core/src/main/java/sonia/scm/user/xml/XmlUserManager.java

@@ -115,6 +115,20 @@ public class XmlUserManager extends AbstractUserManager
     // do nothing
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @param username
+   *
+   * @return
+   */
+  @Override
+  public boolean contains(String username)
+  {
+    return userDB.contains(username);
+  }
+
   /**
    * Method description
    *