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23 package org.apache.struts.webapp.example2.plugin;
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26 import java.io.BufferedInputStream;
27 import java.io.BufferedOutputStream;
28 import java.io.File;
29 import java.io.FileOutputStream;
30 import java.util.ArrayList;
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32 import jakarta.servlet.ServletException;
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34 import org.apache.struts.action.ActionServlet;
35 import org.apache.struts.action.PlugIn;
36 import org.apache.struts.apps.mailreader.dao.impl.memory.MemoryUserDatabase;
37 import org.apache.struts.config.ModuleConfig;
38 import org.apache.struts.util.LabelValueBean;
39 import org.apache.struts.webapp.example2.Constants;
40 import org.slf4j.Logger;
41 import org.slf4j.LoggerFactory;
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61 public final class MemoryDatabasePlugIn implements PlugIn {
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70 private MemoryUserDatabase database = null;
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76 private final static Logger LOG =
77 LoggerFactory.getLogger(MemoryDatabasePlugIn.class);
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83 private ActionServlet servlet = null;
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93 private String pathname = "/WEB-INF/database.xml";
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95 public String getPathname() {
96 return (this.pathname);
97 }
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99 public void setPathname(String pathname) {
100 this.pathname = pathname;
101 }
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111 public void destroy() {
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113 LOG.info("Finalizing memory database plug in");
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115 if (database != null) {
116 try {
117 database.close();
118 } catch (Exception e) {
119 LOG.error("Closing memory database", e);
120 }
121 }
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123 servlet.getServletContext().removeAttribute(Constants.DATABASE_KEY);
124 database = null;
125 servlet = null;
126 database = null;
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128 }
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139 public void init(ActionServlet servlet, ModuleConfig config)
140 throws ServletException {
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142 LOG.info("Initializing memory database plug in from '{}'",
143 pathname);
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146 this.servlet = servlet;
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149 database = new MemoryUserDatabase();
150 try {
151 String path = calculatePath();
152 LOG.debug(" Loading database from '{}'", path);
153 database.setPathname(path);
154 database.open();
155 } catch (Exception e) {
156 LOG.error("Opening memory database", e);
157 throw new ServletException("Cannot load database from '" +
158 pathname + "'", e);
159 }
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162 servlet.getServletContext().setAttribute(Constants.DATABASE_KEY,
163 database);
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166 setupCache(servlet, config);
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168 }
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184 protected void setupCache(ActionServlet servlet, ModuleConfig config) {
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187 ArrayList<LabelValueBean> serverTypes = new ArrayList<>();
188 serverTypes.add(new LabelValueBean("IMAP Protocol", "imap"));
189 serverTypes.add(new LabelValueBean("POP3 Protocol", "pop3"));
190 servlet.getServletContext().setAttribute("serverTypes", serverTypes);
191
192 }
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206 private String calculatePath() throws Exception {
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209 String path = servlet.getServletContext().getRealPath(pathname);
210 if (path != null) {
211 return (path);
212 }
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215 File dir = (File)
216 servlet.getServletContext().getAttribute
217 ("jakarta.servlet.context.tempdir");
218 File file = new File(dir, "struts-example-database.xml");
219 if (file.exists()) {
220 return (file.getAbsolutePath());
221 }
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224 try (BufferedInputStream bis = new BufferedInputStream(
225 servlet.getServletContext().getResourceAsStream(pathname), 1024);
226 BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file), 1024)) {
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228 byte buffer[] = new byte[1024];
229 while (true) {
230 int n = bis.read(buffer);
231 if (n <= 0) {
232 break;
233 }
234 bos.write(buffer, 0, n);
235 }
236 }
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238 return (file.getAbsolutePath());
239
240 }
241 }