diff -r 1612dbcec451 -r 639991d0808a java/cewolf-1.0/src/main/java/de/laures/cewolf/Configuration.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/java/cewolf-1.0/src/main/java/de/laures/cewolf/Configuration.java	Sat Feb 28 21:31:02 2009 +0100
@@ -0,0 +1,169 @@
+/* ================================================================
+ * Cewolf : Chart enabling Web Objects Framework
+ * ================================================================
+ *
+ * Project Info:  http://cewolf.sourceforge.net
+ * Project Lead:  Guido Laures (guido@laures.de);
+ *
+ * (C) Copyright 2002, by Guido Laures
+ *
+ * This library is free software; you can redistribute it and/or modify it under the terms
+ * of the GNU Lesser General Public License as published by the Free Software Foundation;
+ * either version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with this
+ * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+package de.laures.cewolf;
+
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletContext;
+
+/**
+ * This class represents the configuration of the Cewolf framework.
+ * It is designed as singleton and resists in application context.
+ * @author glaures
+ * @since 0.8
+ */
+public class Configuration {
+
+	public static final String KEY = Configuration.class.getName();
+	private static final String DEFAULT_OVERLIB_URL = "overlib.js";
+	private static final String DEFAULT_STORAGE = "de.laures.cewolf.storage.TransientSessionStorage";
+
+	private String overlibURL = DEFAULT_OVERLIB_URL;
+	private boolean debugged = false;
+
+	private String storageClassName = DEFAULT_STORAGE;
+	private Storage storage = null;
+	private Map parameters = new HashMap();
+
+	/** package protected constructor triggered by servlet */
+	protected Configuration(ServletContext ctx) {
+        ctx.log("configuring cewolf app..");
+        ctx.setAttribute(KEY, this);
+
+        //retrieve the init config params
+        ServletConfig config = (ServletConfig) ctx.getAttribute(CewolfRenderer.INIT_CONFIG);
+        if (config != null)
+        {
+            Enumeration initParams = config.getInitParameterNames();
+            try {
+                while (initParams.hasMoreElements()) {
+                    String param = (String) initParams.nextElement();
+                    String value = config.getInitParameter(param);
+                    if ("debug".equalsIgnoreCase(param)) {
+                        debugged = Boolean.valueOf(value).booleanValue();
+                    } else if ("overliburl".equalsIgnoreCase(param)) {
+                        overlibURL = value;
+                    } else if ("storage".equalsIgnoreCase(param)) {
+                        storageClassName = value;
+                    } else {
+                        ctx.log(param + " parameter is ignored.");
+                    }
+                    parameters.put(param,value);
+                }
+            } catch (Throwable t) {
+                ctx.log("Error in Cewolf config.", t);
+            }            
+        }
+        else {
+        	ctx.log("Cewolf Misconfiguration. You should add a <load-on-startup> tag "
+        			+ "to your web.xml for the Cewolf rendering servlet.\n"
+					+ "A default Configuration will be used if not.");
+        }
+        
+		try {
+			initStorage(ctx);
+		} catch (CewolfException ex) {
+			ctx.log("exception during storage init from class " + storageClassName);
+			ctx.log("using " + DEFAULT_STORAGE);
+			storageClassName = DEFAULT_STORAGE;
+			try {
+				initStorage(ctx);
+			} catch(CewolfException cwex){
+				cwex.printStackTrace();
+				throw new RuntimeException(storageClassName + ".init() threw exception.");
+			}
+		}
+		ctx.log("using storage class " + storageClassName);
+		ctx.log("using overlibURL " + overlibURL);
+		ctx.log("debugging is turned " + (debugged ? "on" : "off"));
+		ctx.log("...done.");
+	}
+	
+	private void initStorage(ServletContext ctx) throws CewolfException {
+		try {
+			storage = (Storage)Class.forName(storageClassName).newInstance();
+		} catch(Exception ex){
+			ex.printStackTrace();
+			throw new CewolfException(ex.getMessage());
+		}
+		storage.init(ctx);
+	}
+
+	private Configuration() {
+	}
+
+	/**
+	 * Factory method. If no Configuration had been initialized before, a new
+	 * one is created, stored in ctx and returned to the caller.
+	 * @param ctx the servlet context from where to retrieve the Configuration
+	 * object.
+	 * @return the config object
+	 */
+	public static Configuration getInstance(ServletContext ctx) {
+		Configuration config = null;
+        config = (Configuration) ctx.getAttribute(KEY);
+        
+        if (config == null)
+        {
+            ctx.log("No Configuration for this context.  Initializing.");
+            config = new Configuration(ctx);
+            ctx.setAttribute(KEY, config);
+        }
+
+		return config;
+	}
+        
+	/**
+	 * Checks if debugging is configured to be turned on. Configured by
+	 * init param <code>debug</code> in web.xml.
+	 * @return <code>true</code> if a debugging is on, else <code>false</false>
+	 */
+	public boolean isDebugged() {
+		return debugged;
+	}
+
+	/**
+	 * Returns the location of the overlib.js relative to webapp's root.
+	 * Configured by init param <code>overliburl</code> in web.xml. Defaults to
+	 * <code>overlib.js</code>
+	 * @return String
+	 */
+	public String getOverlibURL() {
+		return overlibURL;
+	}
+
+	public Storage getStorage() {
+		return storage;
+	}
+	
+	/**
+	 * Get the initialization parameters from Cewolf servlet.
+	 * @return The parameter map (String->String) values
+	 */
+	public Map getParameters() {
+		return parameters;
+	}
+}