src/net/pterodactylus/jsite/project/ProjectManager.java

   1 /*
   2  * jSite2 - ProjectManager.java -
   3  * Copyright © 2008 David Roden
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 package net.pterodactylus.jsite.project;
  21
  22 import java.beans.PropertyChangeEvent;
  23 import java.beans.PropertyChangeListener;
  24 import java.io.File;
  25 import java.io.FileInputStream;
  26 import java.io.FileOutputStream;
  27 import java.io.IOException;
  28 import java.io.InputStream;
  29 import java.io.OutputStream;
  30 import java.util.ArrayList;
  31 import java.util.Collections;
  32 import java.util.List;
  33 import java.util.Properties;
  34 import java.util.Random;
  35 import java.util.logging.Logger;
  36
  37 import net.pterodactylus.jsite.core.JSiteException;
  38 import net.pterodactylus.jsite.core.NodeManager;
  39 import net.pterodactylus.util.io.Closer;
  40 import net.pterodactylus.util.logging.Logging;
  41 import net.pterodactylus.util.number.Hex;
  42
  43 /**
  44  * Manages projects, taking care of persistence, lifetime statistics, and other
  45  * things.
  46  *
  47  * @author David ‘Bombe’ Roden &lt;bombe@freenetproject.org&gt;
  48  * @version $Id$
  49  */
  50 public class ProjectManager implements PropertyChangeListener {
  51
  52         /** Logger. */
  53         private static final Logger logger = Logging.getLogger(ProjectManager.class.getName());
  54
  55         /** The RNG used to create project IDs. */
  56         private static final Random random = new Random();
  57
  58         /** The directory the projects are stored in. */
  59         private final String directory;
  60
  61         /** The node manager. */
  62         private NodeManager nodeManager;
  63
  64         /** All projects. */
  65         private final List<Project> projects = Collections.synchronizedList(new ArrayList<Project>());
  66
  67         /**
  68          * Creates a new project manager that saves and restores its state to/from
  69          * the given directory.
  70          *
  71          * @param directory
  72          *            The directory to save and restore states to/from
  73          */
  74         public ProjectManager(String directory) {
  75                 this.directory = directory;
  76         }
  77
  78         //
  79         // ACCESSORS
  80         //
  81
  82         /**
  83          * Returns the directory the projects are loaded from and saved to.
  84          *
  85          * @return The directory for storing the projects
  86          */
  87         public String getDirectory() {
  88                 return directory;
  89         }
  90
  91         /**
  92          * Returns a list of all projects.
  93          *
  94          * @return A list of all projects
  95          */
  96         public List<Project> getProjects() {
  97                 return Collections.unmodifiableList(new ArrayList<Project>(projects));
  98         }
  99
 100         /**
 101          * Sets the node manager to use.
 102          *
 103          * @param nodeManager
 104          *            The node manager to use
 105          */
 106         public void setNodeManager(NodeManager nodeManager) {
 107                 this.nodeManager = nodeManager;
 108         }
 109
 110         //
 111         // ACTIONS
 112         //
 113
 114         /**
 115          * Loads projects and statistics.
 116          *
 117          * @throws IOException
 118          *             if an I/O error occurs
 119          */
 120         public void load() throws IOException {
 121                 File directoryFile = new File(directory);
 122                 File projectFile = new File(directoryFile, "projects.properties");
 123                 if (!projectFile.exists() || !projectFile.isFile() || !projectFile.canRead()) {
 124                         return;
 125                 }
 126                 Properties projectProperties = new Properties();
 127                 InputStream projectInputStream = null;
 128                 try {
 129                         projectInputStream = new FileInputStream(projectFile);
 130                         projectProperties.load(projectInputStream);
 131                 } finally {
 132                         Closer.close(projectInputStream);
 133                 }
 134                 int projectIndex = 0;
 135                 while (projectProperties.containsKey("projects." + projectIndex + ".name")) {
 136                         String projectPrefix = "projects." + projectIndex;
 137                         String projectId = projectProperties.getProperty(projectPrefix + ".id");
 138                         String projectName = projectProperties.getProperty(projectPrefix + ".name");
 139                         String projectDescription = projectProperties.getProperty(projectPrefix + ".description");
 140                         String projectPrivateKey = projectProperties.getProperty(projectPrefix + ".privateKey");
 141                         String projectPublicKey = projectProperties.getProperty(projectPrefix + ".publicKey");
 142                         Project project = new Project();
 143                         project.setId(projectId);
 144                         project.setName(projectName);
 145                         project.setDescription(projectDescription);
 146                         project.setPrivateKey(projectPrivateKey);
 147                         project.setPublicKey(projectPublicKey);
 148                         projects.add(project);
 149                         logger.fine("loaded project “" + project.getName() + "”.");
 150                         projectIndex++;
 151                 }
 152         }
 153
 154         /**
 155          * Saves projects and statistics.
 156          *
 157          * @throws IOException
 158          *             if an I/O error occurs
 159          */
 160         public void save() throws IOException {
 161                 File directoryFile = new File(directory);
 162                 if (!directoryFile.exists()) {
 163                         if (!directoryFile.mkdirs()) {
 164                                 throw new IOException("could not create directory: " + directory);
 165                         }
 166                 }
 167                 Properties projectProperties = new Properties();
 168                 int projectIndex = 0;
 169                 for (Project project: projects) {
 170                         String projectPrefix = "projects." + projectIndex;
 171                         projectProperties.setProperty(projectPrefix + ".id", project.getId());
 172                         projectProperties.setProperty(projectPrefix + ".name", project.getName());
 173                         projectProperties.setProperty(projectPrefix + ".description", project.getDescription());
 174                         projectProperties.setProperty(projectPrefix + ".privateKey", project.getPrivateKey());
 175                         projectProperties.setProperty(projectPrefix + ".publicKey", project.getPublicKey());
 176                         projectIndex++;
 177                 }
 178                 File projectFile = new File(directoryFile, "projects.properties");
 179                 OutputStream projectOutputStream = null;
 180                 try {
 181                         projectOutputStream = new FileOutputStream(projectFile);
 182                         projectProperties.store(projectOutputStream, "jSite projects");
 183                 } finally {
 184                         Closer.close(projectOutputStream);
 185                 }
 186         }
 187
 188         /**
 189          * Creates a new project. The returned {@link Project} will contain a newly
 190          * generated key pair.
 191          *
 192          * @return A newly created project
 193          * @throws IOException
 194          *             if an I/O error occured communicating with the node
 195          * @throws JSiteException
 196          *             if there is a problem with the node
 197          */
 198         public Project createProject() throws IOException, JSiteException {
 199                 Project project = new Project();
 200                 String[] keyPair = nodeManager.generateKeyPair();
 201                 byte[] idBytes = new byte[16];
 202                 random.nextBytes(idBytes);
 203                 project.setId(Hex.toHex(idBytes));
 204                 project.setName("");
 205                 project.setDescription("");
 206                 project.setPrivateKey(keyPair[0]);
 207                 project.setPublicKey(keyPair[1]);
 208                 projects.add(project);
 209                 project.addPropertyChangeListener(this);
 210                 try {
 211                         save();
 212                 } catch (IOException ioe1) {
 213                         /* ignore. */
 214                 }
 215                 return project;
 216         }
 217
 218         //
 219         // INTERFACE PropertyChangeListener
 220         //
 221
 222         /**
 223          * {@inheritDoc}
 224          */
 225         public void propertyChange(PropertyChangeEvent propertyChangeEvent) {
 226                 try {
 227                         save();
 228                 } catch (IOException ioe1) {
 229                         /* ignore. */
 230                 }
 231         }
 232
 233 }