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Modules/servlet/ZZServlet.java

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+/*   
+ZZServlet.java
+ *    
+ *    Copyright (c) 2001, Ted Nelson and Tuomas Lukka
+ *
+ *    You may use and distribute under the terms of either the GNU Lesser
+ *    General Public License, either version 2 of the license or,
+ *    at your choice, any later version. Alternatively, you may use and
+ *    distribute under the terms of the XPL.
+ *
+ *    See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of 
+ *    the licenses.
+ *
+ *    This software 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 README
+ *    file for more details.
+ *
+ */
+/*
+ * Written by Tuomas Lukka
+ */
+package org.gzigzag.module;
+import org.gzigzag.*;
+import java.util.*;
+import javax.servlet.*;
+import javax.servlet.http.*;
+import java.io.*;
+
+
+/** A base class for servlets based on ZZ spaces.
+ */
+
+public class ZZServlet extends HttpServlet {
+public static final String rcsid = "$Id: ZZServlet.java,v 1.1 2001/01/17 14:27:20 tjl Exp $";
+
+    static Hashtable spaces = new Hashtable();
+    static Object lock = new Object();
+
+    static ZZSpace getSpace(String name) {
+	synchronized(lock) {
+	    ZZSpace s = (ZZSpace)spaces.get(name);
+	    if(s == null) {
+		File f = new File(name);
+		s = new ZZCacheDimSpace(new DirStreamSet(f));
+		spaces.put(name, s);
+	    }
+	    return s;
+	}
+    }
+
+
+    ZZSpace space;
+
+    public void init(ServletConfig config) throws ServletException {
+	synchronized(lock) {
+	    String s = config.getInitParameter("space");
+	    if(s == null) {
+		// throw new ServletException("No space specified!");
+		s = "/tmp/testspace";
+	    }
+	    space = getSpace(s);
+	}
+    }
+
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) 
+	throws ServletException {
+	try {
+	synchronized(space) {
+	    resp.getWriter().print("HELLO\n\n!!\n\n");
+	}
+	} catch(Exception e) {
+	    throw new ServletException("doGet: ", e);
+	}
+    }
+
+}
+