Source Code Cross Referenced for RootCollection.java in  » Net » DrFTPD » org » drftpd » slave » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » DrFTPD » org.drftpd.slave 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * This file is part of DrFTPD, Distributed FTP Daemon.
003:         *
004:         * DrFTPD is free software; you can redistribute it and/or modify
005:         * it under the terms of the GNU General Public License as published by
006:         * the Free Software Foundation; either version 2 of the License, or
007:         * (at your option) any later version.
008:         *
009:         * DrFTPD is distributed in the hope that it will be useful,
010:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
011:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
012:         * GNU General Public License for more details.
013:         *
014:         * You should have received a copy of the GNU General Public License
015:         * along with DrFTPD; if not, write to the Free Software
016:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
017:         */
018:        package org.drftpd.slave;
019:
020:        import org.apache.log4j.Logger;
021:
022:        import se.mog.io.File;
023:        import se.mog.io.PermissionDeniedException;
024:
025:        import java.io.FileNotFoundException;
026:        import java.io.IOException;
027:
028:        import java.util.ArrayList;
029:        import java.util.Collection;
030:        import java.util.Collections;
031:        import java.util.Comparator;
032:        import java.util.Hashtable;
033:        import java.util.Iterator;
034:        import java.util.List;
035:
036:        //TODO SECURITY: verify so that we never get outside of a rootbasket root
037:
038:        /**
039:         * @author mog
040:         * @version $Id: RootCollection.java 1562 2007-01-05 12:37:07Z zubov $
041:         */
042:        public class RootCollection {
043:            private static final Logger logger = Logger
044:                    .getLogger(RootCollection.class);
045:            private Collection _roots;
046:
047:            public RootCollection(Collection roots) throws IOException {
048:                /** sanity checks **/
049:                validateRoots(roots);
050:                _roots = new ArrayList(roots);
051:            }
052:
053:            public Root getARoot() {
054:                long mostFree = 0;
055:                Root mostFreeRoot = null;
056:
057:                for (Iterator iter = _roots.iterator(); iter.hasNext();) {
058:                    Root root = (Root) iter.next();
059:                    long diskSpaceAvailable = root.getDiskSpaceAvailable();
060:
061:                    if (diskSpaceAvailable > mostFree) {
062:                        mostFree = diskSpaceAvailable;
063:                        mostFreeRoot = root;
064:                    }
065:                }
066:
067:                if (mostFreeRoot == null) {
068:                    throw new RuntimeException("NoAvailableRootsException");
069:                }
070:
071:                return mostFreeRoot;
072:            }
073:
074:            /**
075:             * Get a directory specified by dir under an approperiate root for storing storing files in.
076:             * @param directory to store file in
077:             * @throws PermissionDeniedException If creation of dir failed in the slave root selected by getARootFileDir().
078:             */
079:            public File getARootFileDir(String dir)
080:                    throws PermissionDeniedException {
081:                Iterator iter = _roots.iterator();
082:                Root bestRoot = (Root) iter.next();
083:
084:                while (iter.hasNext()) {
085:                    Root root = (Root) iter.next();
086:
087:                    if (bestRoot.isFull()) {
088:                        bestRoot = root;
089:
090:                        continue;
091:                    }
092:
093:                    if (root.lastModified() > bestRoot.lastModified()) {
094:                        if (root.isFull() && !bestRoot.isFull()) {
095:                            continue;
096:                        }
097:
098:                        bestRoot = root;
099:                    }
100:                }
101:
102:                bestRoot.touch();
103:
104:                File file = bestRoot.getFile(dir);
105:
106:                file.mkdirs2();
107:
108:                return file;
109:            }
110:
111:            //Get root which has most of the tree structure that we have.
112:            public File getFile(String path) throws FileNotFoundException {
113:                return new File(getRootForFile(path).getPath()
114:                        + File.separatorChar + path);
115:            }
116:
117:            /**
118:             * Returns an ArrayList containing se.mog.io.File objects
119:             */
120:            public List getMultipleFiles(String path)
121:                    throws FileNotFoundException {
122:                ArrayList files = new ArrayList();
123:
124:                for (Iterator iter = getMultipleRootsForFile(path).iterator(); iter
125:                        .hasNext();) {
126:                    files.add(((Root) iter.next()).getFile(path));
127:                }
128:
129:                return files;
130:            }
131:
132:            public List getMultipleRootsForFile(String path)
133:                    throws FileNotFoundException {
134:                ArrayList roots = new ArrayList();
135:
136:                for (Iterator iter = _roots.iterator(); iter.hasNext();) {
137:                    Root root = (Root) iter.next();
138:
139:                    if (root.getFile(path).exists()) {
140:                        roots.add(root);
141:                    }
142:                }
143:
144:                if (roots.size() == 0) {
145:                    throw new FileNotFoundException(
146:                            "Unable to find suitable root: " + path);
147:                }
148:
149:                return roots;
150:            }
151:
152:            public Root getRootForFile(String path)
153:                    throws FileNotFoundException {
154:                for (Iterator iter = _roots.iterator(); iter.hasNext();) {
155:                    Root root = (Root) iter.next();
156:                    File file = new File(root.getPath() + File.separatorChar
157:                            + path);
158:                    System.out.println(file.getPath());
159:                    if (file.exists()) {
160:                        return root;
161:                    }
162:                }
163:                throw new FileNotFoundException(path
164:                        + " wasn't found in any root");
165:            }
166:
167:            public long getTotalDiskSpaceAvailable() {
168:                long totalDiskSpaceAvailable = 0;
169:
170:                for (Iterator iter = _roots.iterator(); iter.hasNext();) {
171:                    Root root = (Root) iter.next();
172:                    File rootFile = root.getFile();
173:                    totalDiskSpaceAvailable += rootFile.getDiskSpaceAvailable();
174:                }
175:
176:                return totalDiskSpaceAvailable;
177:            }
178:
179:            public long getTotalDiskSpaceCapacity() {
180:                long totalDiskSpaceCapacity = 0;
181:
182:                for (Iterator iter = _roots.iterator(); iter.hasNext();) {
183:                    Root root = (Root) iter.next();
184:                    File rootFile = root.getFile();
185:                    totalDiskSpaceCapacity += rootFile.getDiskSpaceCapacity();
186:                }
187:
188:                return totalDiskSpaceCapacity;
189:            }
190:
191:            public Iterator iterator() {
192:                return _roots.iterator();
193:            }
194:
195:            private static void validateRoots(Collection roots)
196:                    throws IOException {
197:                File[] mountsArr = File.listMounts();
198:                ArrayList mounts = new ArrayList(mountsArr.length);
199:
200:                for (int i = 0; i < mountsArr.length; i++) {
201:                    mounts.add(mountsArr[i]);
202:                }
203:
204:                Collections.sort(mounts, new Comparator() {
205:                    public boolean equals(Object obj) {
206:                        if (obj == null)
207:                            return false;
208:                        return obj.getClass() == getClass();
209:                    }
210:
211:                    public int hashCode() {
212:                        return getClass().hashCode();
213:                    }
214:
215:                    public int compare(Object o1, Object o2) {
216:                        return compare((File) o1, (File) o2);
217:                    }
218:
219:                    public int compare(File o1, File o2) {
220:                        int this Val = o1.getPath().length();
221:                        int anotherVal = o2.getPath().length();
222:
223:                        return ((this Val < anotherVal) ? 1
224:                                : ((this Val == anotherVal) ? 0 : (-1)));
225:                    }
226:                });
227:
228:                Hashtable usedMounts = new Hashtable();
229:
230:                for (Iterator iter = roots.iterator(); iter.hasNext();) {
231:                    Object o = iter.next();
232:
233:                    if (!(o instanceof  Root)) {
234:                        throw new RuntimeException();
235:                    }
236:
237:                    Root root = (Root) o;
238:                    File rootFile = root.getFile();
239:
240:                    if (!rootFile.exists()) {
241:                        if (!rootFile.mkdirs()) {
242:                            throw new IOException("mkdirs() failed on "
243:                                    + rootFile.getPath());
244:                        }
245:                    }
246:
247:                    if (!rootFile.exists()) {
248:                        throw new FileNotFoundException("Invalid root: "
249:                                + rootFile);
250:                    }
251:
252:                    String fullpath = rootFile.getAbsolutePath();
253:
254:                    for (Iterator iterator = mounts.iterator(); iterator
255:                            .hasNext();) {
256:                        File mount = (File) iterator.next();
257:
258:                        if (fullpath.startsWith(mount.getPath())) {
259:                            logger.info(fullpath + " in mount "
260:                                    + mount.getPath());
261:
262:                            if (usedMounts.get(mount.getPath()) != null) {
263:                                throw new IOException(
264:                                        "Multiple roots in mount "
265:                                                + mount.getPath());
266:                            }
267:
268:                            usedMounts.put(mount.getPath(), new Object());
269:
270:                            break;
271:                        }
272:                    }
273:
274:                    for (Iterator iterator = roots.iterator(); iterator
275:                            .hasNext();) {
276:                        Root root2 = (Root) iterator.next();
277:
278:                        if (root == root2) {
279:                            continue;
280:                        }
281:
282:                        if ((root2.getPath() + File.pathSeparator)
283:                                .startsWith(root.getPath() + File.pathSeparator)) {
284:                            throw new RuntimeException("Overlapping roots: "
285:                                    + root.getPath() + " and "
286:                                    + root2.getPath());
287:                        }
288:                    }
289:                }
290:            }
291:
292:            public int getMaxPath() {
293:                if (Slave.isWin32) {
294:                    int maxPath = 0;
295:
296:                    for (Iterator iter = iterator(); iter.hasNext();) {
297:                        Root root = (Root) iter.next();
298:                        maxPath = Math.max(root.getPath().length(), maxPath);
299:                    } //constant for win32, see
300:
301:                    //http://support.microsoft.com/default.aspx?scid=http://support.microsoft.com:80/support/kb/articles/Q177/6/65.ASP&NoWebContent=1
302:                    // for more info
303:                    return 256 - maxPath;
304:                }
305:
306:                return -1;
307:            }
308:        }
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