added BootstrapFilter and BootstrapListener

scm-webapp/src/main/java/sonia/scm/boot/BootstrapUtil.java

@@ -0,0 +1,171 @@
+/**
+ * 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, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.boot;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import javax.servlet.ServletContext;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class BootstrapUtil
+{
+
+  /** Field description */
+  public static final String CLASSLOADER = "sonia.scm.BoostrapClassLoader";
+
+  /** the logger for BootstrapUtil */
+  private static final Logger logger =
+    LoggerFactory.getLogger(BootstrapUtil.class);
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param classLoader
+   * @param clazz
+   * @param <T>
+   *
+   * @return
+   */
+  public static <T> T loadClass(ClassLoader classLoader, Class<T> clazz)
+  {
+    T instance = null;
+
+    try
+    {
+      instance = (T) classLoader.loadClass(clazz.getName()).newInstance();
+    }
+    catch (Exception ex)
+    {
+      logger.error(ex.getMessage(), ex);
+    }
+
+    return instance;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param classLoader
+   * @param clazz
+   * @param className
+   * @param <T>
+   *
+   * @return
+   */
+  public static <T> T loadClass(ClassLoader classLoader, Class<T> clazz,
+                                String className)
+  {
+    T instance = null;
+
+    try
+    {
+      instance = (T) classLoader.loadClass(className).newInstance();
+    }
+    catch (Exception ex)
+    {
+      logger.error(ex.getMessage(), ex);
+    }
+
+    return instance;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   *
+   * @param clazz
+   * @param className
+   * @param <T>
+   *
+   * @return
+   */
+  public static <T> T loadClass(Class<T> clazz, String className)
+  {
+    T instance = null;
+
+    try
+    {
+      instance = (T) Class.forName(className).newInstance();
+    }
+    catch (Exception ex)
+    {
+      logger.error(ex.getMessage(), ex);
+    }
+
+    return instance;
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param context
+   *
+   * @return
+   */
+  public static ClassLoader getClassLoader(ServletContext context)
+  {
+    return (ClassLoader) context.getAttribute(CLASSLOADER);
+  }
+
+  //~--- set methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param context
+   * @param classLoader
+   */
+  public static void setClassLoader(ServletContext context,
+                                    ClassLoader classLoader)
+  {
+    context.setAttribute(CLASSLOADER, classLoader);
+  }
+}