GUACAMOLE-5: Use AuthenticationProviderService as the means of defining AuthenticationProvider behavior.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/AuthenticationProviderService.java

@@ -17,19 +17,13 @@
  * under the License.
  */
 
-package org.apache.guacamole.auth.jdbc.user;
+package org.apache.guacamole.auth.jdbc;
 
-import com.google.inject.Inject;
-import com.google.inject.Provider;
 import org.apache.guacamole.GuacamoleException;
-import org.apache.guacamole.auth.jdbc.sharing.ConnectionSharingService;
-import org.apache.guacamole.auth.jdbc.sharing.SharedConnectionUser;
-import org.apache.guacamole.auth.jdbc.sharing.SharedConnectionUserContext;
 import org.apache.guacamole.net.auth.AuthenticatedUser;
 import org.apache.guacamole.net.auth.AuthenticationProvider;
 import org.apache.guacamole.net.auth.Credentials;
-import org.apache.guacamole.net.auth.credentials.CredentialsInfo;
-import org.apache.guacamole.net.auth.credentials.GuacamoleInvalidCredentialsException;
+import org.apache.guacamole.net.auth.UserContext;
 
 /**
  * Service which authenticates users based on credentials and provides for
@@ -38,31 +32,7 @@ import org.apache.guacamole.net.auth.credentials.GuacamoleInvalidCredentialsExce
  *
  * @author Michael Jumper
  */
-public class AuthenticationProviderService  {
-
-    /**
-     * Service for accessing users.
-     */
-    @Inject
-    private UserService userService;
-
-    /**
-     * Provider for retrieving UserContext instances.
-     */
-    @Inject
-    private Provider<UserContext> userContextProvider;
-
-    /**
-     * Provider for retrieving SharedConnectionUserContext instances.
-     */
-    @Inject
-    private Provider<SharedConnectionUserContext> sharedUserContextProvider;
-
-    /**
-     * Service for sharing active connections.
-     */
-    @Inject
-    private ConnectionSharingService sharingService;
+public interface AuthenticationProviderService  {
 
     /**
      * Authenticates the user having the given credentials, returning a new
@@ -86,24 +56,7 @@ public class AuthenticationProviderService  {
      *     credentials are invalid or expired.
      */
     public AuthenticatedUser authenticateUser(AuthenticationProvider authenticationProvider,
-            Credentials credentials) throws GuacamoleException {
-
-        AuthenticatedUser user;
-
-        // Check whether user is authenticating with a valid sharing key
-        user = sharingService.retrieveSharedConnectionUser(authenticationProvider, credentials);
-        if (user != null)
-            return user;
-
-        // Authenticate user
-        user = userService.retrieveAuthenticatedUser(authenticationProvider, credentials);
-        if (user != null)
-            return user;
-
-        // Otherwise, unauthorized
-        throw new GuacamoleInvalidCredentialsException("Invalid login", CredentialsInfo.USERNAME_PASSWORD);
-
-    }
+            Credentials credentials) throws GuacamoleException;
 
     /**
      * Returning a new UserContext instance for the given already-authenticated
@@ -121,26 +74,7 @@ public class AuthenticationProviderService  {
      *     If an error occurs during authentication, or if the given
      *     credentials are invalid or expired.
      */
-    public org.apache.guacamole.net.auth.UserContext getUserContext(
-            AuthenticatedUser authenticatedUser) throws GuacamoleException {
-
-        // Produce sharing-specific user context if this is the user of a shared connection
-        if (authenticatedUser instanceof SharedConnectionUser) {
-            SharedConnectionUserContext context = sharedUserContextProvider.get();
-            context.init((SharedConnectionUser) authenticatedUser);
-            return context;
-        }
-
-        // Retrieve user account for already-authenticated user
-        ModeledUser user = userService.retrieveUser(authenticatedUser);
-        if (user == null)
-            return null;
-
-        // Link to user context
-        UserContext context = userContextProvider.get();
-        context.init(user.getCurrentUser());
-        return context;
-
-    }
+    public UserContext getUserContext(AuthenticatedUser authenticatedUser)
+            throws GuacamoleException;
 
 }

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/InjectedAuthenticationProvider.java

@@ -24,48 +24,58 @@ import org.apache.guacamole.GuacamoleException;
 import org.apache.guacamole.net.auth.AuthenticationProvider;
 import org.apache.guacamole.net.auth.Credentials;
 import org.apache.guacamole.net.auth.UserContext;
-import org.apache.guacamole.auth.jdbc.user.AuthenticationProviderService;
 import org.apache.guacamole.net.auth.AuthenticatedUser;
 
 /**
- * Provides a base implementation of an AuthenticationProvider which is backed
- * by an arbitrary underlying database. It is up to the subclass implementation
- * to configure the underlying database appropriately via Guice.
+ * Provides a base implementation of an AuthenticationProvider which delegates
+ * the various function calls to an underlying AuthenticationProviderService
+ * implementation. As such a service is injectable by Guice, this provides a
+ * means for Guice to (effectively) apply dependency injection to an
+ * AuthenticationProvider, even though it is the AuthenticationProvider that
+ * serves as the entry point.
  *
- * @author James Muehlner
  * @author Michael Jumper
  */
-public abstract class JDBCAuthenticationProvider implements AuthenticationProvider {
+public abstract class InjectedAuthenticationProvider implements AuthenticationProvider {
 
     /**
-     * Provider of the singleton Injector instance which will manage the object
-     * graph of this authentication provider.
+     * The AuthenticationProviderService to which all AuthenticationProvider
+     * calls will be delegated.
      */
-    private final JDBCInjectorProvider injectorProvider;
+    private final AuthenticationProviderService authProviderService;
 
     /**
-     * Creates a new AuthenticationProvider that is backed by an arbitrary
-     * underlying database.
+     * Creates a new AuthenticationProvider that delegates all calls to an
+     * underlying AuthenticationProviderService. The behavior of the
+     * AuthenticationProvider is defined by the given
+     * AuthenticationProviderService implementation, which will be injected by
+     * the Guice Injector provided by the given JDBCInjectorProvider.
      *
      * @param injectorProvider
      *     A JDBCInjectorProvider instance which provides singleton instances
      *     of a Guice Injector, pre-configured to set up all injections and
      *     access to the underlying database via MyBatis.
+     *
+     * @param authProviderServiceClass
+     *    The AuthenticationProviderService implementation which defines the
+     *    behavior of this AuthenticationProvider.
+     *
+     * @throws GuacamoleException
+     *     If the Injector cannot be created due to an error.
      */
-    public JDBCAuthenticationProvider(JDBCInjectorProvider injectorProvider) {
-        this.injectorProvider = injectorProvider;
+    public InjectedAuthenticationProvider(JDBCInjectorProvider injectorProvider,
+            Class<? extends AuthenticationProviderService> authProviderServiceClass)
+        throws GuacamoleException {
+
+        Injector injector = injectorProvider.get();
+        authProviderService = injector.getInstance(authProviderServiceClass);
+
     }
 
     @Override
     public AuthenticatedUser authenticateUser(Credentials credentials)
             throws GuacamoleException {
-
-        Injector injector = injectorProvider.get();
-
-        // Create AuthenticatedUser based on credentials, if valid
-        AuthenticationProviderService authProviderService = injector.getInstance(AuthenticationProviderService.class);
         return authProviderService.authenticateUser(this, credentials);
-
     }
 
     @Override
@@ -80,13 +90,7 @@ public abstract class JDBCAuthenticationProvider implements AuthenticationProvid
     @Override
     public UserContext getUserContext(AuthenticatedUser authenticatedUser)
             throws GuacamoleException {
-
-        Injector injector = injectorProvider.get();
-
-        // Create UserContext based on credentials, if valid
-        AuthenticationProviderService authProviderService = injector.getInstance(AuthenticationProviderService.class);
         return authProviderService.getUserContext(authenticatedUser);
-
     }
 
     @Override

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/JDBCAuthenticationProviderService.java

@@ -0,0 +1,85 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.guacamole.auth.jdbc;
+
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+import org.apache.guacamole.GuacamoleException;
+import org.apache.guacamole.auth.jdbc.user.ModeledUser;
+import org.apache.guacamole.auth.jdbc.user.UserContext;
+import org.apache.guacamole.auth.jdbc.user.UserService;
+import org.apache.guacamole.net.auth.AuthenticatedUser;
+import org.apache.guacamole.net.auth.AuthenticationProvider;
+import org.apache.guacamole.net.auth.Credentials;
+import org.apache.guacamole.net.auth.credentials.CredentialsInfo;
+import org.apache.guacamole.net.auth.credentials.GuacamoleInvalidCredentialsException;
+
+/**
+ * AuthenticationProviderService implementation which authenticates users with
+ * a username/password pair, producing new UserContext objects which are backed
+ * by an underlying, arbitrary database.
+ *
+ * @author Michael Jumper
+ */
+public class JDBCAuthenticationProviderService implements AuthenticationProviderService  {
+
+    /**
+     * Service for accessing users.
+     */
+    @Inject
+    private UserService userService;
+
+    /**
+     * Provider for retrieving UserContext instances.
+     */
+    @Inject
+    private Provider<UserContext> userContextProvider;
+
+    @Override
+    public AuthenticatedUser authenticateUser(AuthenticationProvider authenticationProvider,
+            Credentials credentials) throws GuacamoleException {
+
+        // Authenticate user
+        AuthenticatedUser user = userService.retrieveAuthenticatedUser(authenticationProvider, credentials);
+        if (user != null)
+            return user;
+
+        // Otherwise, unauthorized
+        throw new GuacamoleInvalidCredentialsException("Invalid login", CredentialsInfo.USERNAME_PASSWORD);
+
+    }
+
+    @Override
+    public org.apache.guacamole.net.auth.UserContext getUserContext(
+            AuthenticatedUser authenticatedUser) throws GuacamoleException {
+
+        // Retrieve user account for already-authenticated user
+        ModeledUser user = userService.retrieveUser(authenticatedUser);
+        if (user == null)
+            return null;
+
+        // Link to user context
+        UserContext context = userContextProvider.get();
+        context.init(user.getCurrentUser());
+        return context;
+
+    }
+
+}

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/java/org/apache/guacamole/auth/mysql/MySQLAuthenticationProvider.java

@@ -19,7 +19,9 @@
 
 package org.apache.guacamole.auth.mysql;
 
-import org.apache.guacamole.auth.jdbc.JDBCAuthenticationProvider;
+import org.apache.guacamole.GuacamoleException;
+import org.apache.guacamole.auth.jdbc.InjectedAuthenticationProvider;
+import org.apache.guacamole.auth.jdbc.JDBCAuthenticationProviderService;
 
 /**
  * Provides a MySQL based implementation of the AuthenticationProvider
@@ -28,15 +30,19 @@ import org.apache.guacamole.auth.jdbc.JDBCAuthenticationProvider;
  * @author James Muehlner
  * @author Michael Jumper
  */
-public class MySQLAuthenticationProvider extends JDBCAuthenticationProvider {
+public class MySQLAuthenticationProvider extends InjectedAuthenticationProvider {
 
     /**
      * Creates a new MySQLAuthenticationProvider that reads and writes
      * authentication data to a MySQL database defined by properties in
      * guacamole.properties.
+     *
+     * @throws GuacamoleException
+     *     If a required property is missing, or an error occurs while parsing
+     *     a property.
      */
-    public MySQLAuthenticationProvider() {
-        super(new MySQLInjectorProvider());
+    public MySQLAuthenticationProvider() throws GuacamoleException {
+        super(new MySQLInjectorProvider(), JDBCAuthenticationProviderService.class);
     }
 
     @Override

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/java/org/apache/guacamole/auth/postgresql/PostgreSQLAuthenticationProvider.java

@@ -19,7 +19,9 @@
 
 package org.apache.guacamole.auth.postgresql;
 
-import org.apache.guacamole.auth.jdbc.JDBCAuthenticationProvider;
+import org.apache.guacamole.GuacamoleException;
+import org.apache.guacamole.auth.jdbc.InjectedAuthenticationProvider;
+import org.apache.guacamole.auth.jdbc.JDBCAuthenticationProviderService;
 
 /**
  * Provides a PostgreSQL-based implementation of the AuthenticationProvider
@@ -28,15 +30,19 @@ import org.apache.guacamole.auth.jdbc.JDBCAuthenticationProvider;
  * @author James Muehlner
  * @author Michael Jumper
  */
-public class PostgreSQLAuthenticationProvider extends JDBCAuthenticationProvider {
+public class PostgreSQLAuthenticationProvider extends InjectedAuthenticationProvider {
 
     /**
      * Creates a new PostgreSQLAuthenticationProvider that reads and writes
      * authentication data to a PostgreSQL database defined by properties in
      * guacamole.properties.
+     *
+     * @throws GuacamoleException
+     *     If a required property is missing, or an error occurs while parsing
+     *     a property.
      */
-    public PostgreSQLAuthenticationProvider() {
-        super(new PostgreSQLInjectorProvider());
+    public PostgreSQLAuthenticationProvider() throws GuacamoleException {
+        super(new PostgreSQLInjectorProvider(), JDBCAuthenticationProviderService.class);
     }
 
     @Override