added runAsAdmin api

scm-webapp/src/main/java/sonia/scm/web/security/DefaultAdministrationContext.java

@@ -0,0 +1,163 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of SCM-Manager; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, sEVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.web.security;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.inject.Inject;
+import com.google.inject.Injector;
+import com.google.inject.Provider;
+import com.google.inject.Singleton;
+import com.google.inject.name.Named;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import sonia.scm.user.User;
+import sonia.scm.util.AssertUtil;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.net.URL;
+
+import javax.xml.bind.JAXB;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+@Singleton
+public class DefaultAdministrationContext implements AdministrationContext
+{
+
+  /** Field description */
+  public static final String SYSTEM_ACCOUNT =
+    "/sonia/scm/web/security/system-account.xml";
+
+  /** the logger for DefaultAdministrationContext */
+  private static final Logger logger =
+    LoggerFactory.getLogger(DefaultAdministrationContext.class);
+
+  //~--- constructors ---------------------------------------------------------
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param injector
+   * @param userSessionProvider
+   * @param contextHolder
+   */
+  @Inject
+  public DefaultAdministrationContext(Injector injector,
+          @Named("userSession") Provider<WebSecurityContext> userSessionProvider,
+          LocalSecurityContextHolder contextHolder)
+  {
+    this.injector = injector;
+    this.userSessionProvider = userSessionProvider;
+    this.contextHolder = contextHolder;
+
+    URL url = DefaultAdministrationContext.class.getResource(SYSTEM_ACCOUNT);
+
+    if (url == null)
+    {
+      throw new RuntimeException("could not find resource for system account");
+    }
+
+    User user = JAXB.unmarshal(url, User.class);
+
+    adminContext = new AdministrationSecurityContext(user);
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param action
+   */
+  @Override
+  public void runAsAdmin(PrivilegedAction action)
+  {
+    AssertUtil.assertIsNotNull(action);
+
+    if (logger.isWarnEnabled())
+    {
+      String user = SecurityUtil.getUsername(userSessionProvider);
+
+      logger.warn("user {} executes {} as admin", user,
+                  action.getClass().getName());
+    }
+
+    contextHolder.set(adminContext);
+
+    try
+    {
+      action.run();
+    }
+    finally
+    {
+      contextHolder.remove();
+    }
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param actionClass
+   */
+  @Override
+  public void runAsAdmin(Class<? extends PrivilegedAction> actionClass)
+  {
+    PrivilegedAction action = injector.getInstance(actionClass);
+
+    runAsAdmin(action);
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private AdministrationSecurityContext adminContext;
+
+  /** Field description */
+  private LocalSecurityContextHolder contextHolder;
+
+  /** Field description */
+  private Injector injector;
+
+  /** Field description */
+  private Provider<WebSecurityContext> userSessionProvider;
+}