Move Eclipse 3 components to legacy.

[lgpl/argeo-commons.git] / legacy / org.argeo.cms.ui.workbench / src / org / argeo / cms / spring / AbstractSystemExecution.java

diff --git a/legacy/org.argeo.cms.ui.workbench/src/org/argeo/cms/spring/AbstractSystemExecution.java b/legacy/org.argeo.cms.ui.workbench/src/org/argeo/cms/spring/AbstractSystemExecution.java
new file mode 100644 (file)
index 0000000..ce92c46
--- /dev/null
+++ b/legacy/org.argeo.cms.ui.workbench/src/org/argeo/cms/spring/AbstractSystemExecution.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed 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.argeo.cms.spring;
+
+import javax.security.auth.Subject;
+import javax.security.auth.login.LoginContext;
+import javax.security.auth.login.LoginException;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.cms.CmsException;
+import org.argeo.node.NodeConstants;
+
+/** Provides base method for executing code with system authorization. */
+abstract class AbstractSystemExecution {
+       private final static Log log = LogFactory.getLog(AbstractSystemExecution.class);
+       private final Subject subject = new Subject();
+
+       /** Authenticate the calling thread */
+       protected void authenticateAsSystem() {
+               ClassLoader origClassLoader = Thread.currentThread().getContextClassLoader();
+               Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
+               try {
+                       LoginContext lc = new LoginContext(NodeConstants.LOGIN_CONTEXT_DATA_ADMIN, subject);
+                       lc.login();
+               } catch (LoginException e) {
+                       throw new CmsException("Cannot login as system", e);
+               } finally {
+                       Thread.currentThread().setContextClassLoader(origClassLoader);
+               }
+               if (log.isTraceEnabled())
+                       log.trace("System authenticated");
+       }
+
+       protected void deauthenticateAsSystem() {
+               ClassLoader origClassLoader = Thread.currentThread().getContextClassLoader();
+               Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
+               try {
+                       LoginContext lc = new LoginContext(NodeConstants.LOGIN_CONTEXT_DATA_ADMIN, subject);
+                       lc.logout();
+               } catch (LoginException e) {
+                       throw new CmsException("Cannot logout as system", e);
+               } finally {
+                       Thread.currentThread().setContextClassLoader(origClassLoader);
+               }
+       }
+
+       protected Subject getSubject() {
+               return subject;
+       }
+}