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1
2
3 package com.db4odoc.f1.servlets;
4
5 import com.db4o.Db4o;
6 import com.db4o.ObjectServer;
7 import javax.servlet.*;
8
9 public class Db4oServletContextListener implements ServletContextListener {
10 public static final String  KEY_DB4O_FILE_NAME = "db4oFileName";
11
12 public static final String KEY_DB4O_SERVER = "db4oServer";
13
14 private ObjectServer server = null;
15
16 public void contextInitialized(ServletContextEvent event) {
17 close();
18 ServletContext context = event.getServletContext();
19 String filePath = context.getRealPath("WEB-INF/db/"
20 + context.getInitParameter(KEY_DB4O_FILE_NAME));
21 server = Db4o.openServer(filePath, 0);
22 context.setAttribute(KEY_DB4O_SERVER, server);
23 context.log("db4o startup on " + filePath);
24 }
25
26 public void contextDestroyed(ServletContextEvent event) {
27 ServletContext context = event.getServletContext();
28 context.removeAttribute(KEY_DB4O_SERVER);
29 close();
30 context.log("db4o shutdown");
31 }
32
33 private void close() {
34 if (server != null) {
35 server.close();
36 }
37 server = null;
38 }
39 }
40 |
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