Source Code Cross Referenced for PresentationExport.java in  » ERP-CRM-Financial » sakai » org » theospi » portfolio » presentation » export » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » ERP CRM Financial » sakai » org.theospi.portfolio.presentation.export 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**********************************************************************************
002:         * $URL:https://source.sakaiproject.org/svn/osp/trunk/presentation/api-impl/src/java/org/theospi/portfolio/presentation/export/PresentationExport.java $
003:         * $Id:PresentationExport.java 9134 2006-05-08 20:28:42Z chmaurer@iupui.edu $
004:         ***********************************************************************************
005:         *
006:         * Copyright (c) 2005, 2006 The Sakai Foundation.
007:         *
008:         * Licensed under the Educational Community License, Version 1.0 (the "License");
009:         * you may not use this file except in compliance with the License.
010:         * You may obtain a copy of the License at
011:         *
012:         *      http://www.opensource.org/licenses/ecl1.php
013:         *
014:         * Unless required by applicable law or agreed to in writing, software
015:         * distributed under the License is distributed on an "AS IS" BASIS,
016:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017:         * See the License for the specific language governing permissions and
018:         * limitations under the License.
019:         *
020:         **********************************************************************************/package org.theospi.portfolio.presentation.export;
021:
022:        import java.io.BufferedInputStream;
023:        import java.io.BufferedOutputStream;
024:        import java.io.File;
025:        import java.io.FileFilter;
026:        import java.io.FileInputStream;
027:        import java.io.IOException;
028:        import java.io.InputStream;
029:        import java.io.OutputStream;
030:        import java.net.URL;
031:        import java.util.ArrayList;
032:        import java.util.Iterator;
033:        import java.util.StringTokenizer;
034:        import java.util.zip.Adler32;
035:        import java.util.zip.CheckedOutputStream;
036:        import java.util.zip.ZipEntry;
037:        import java.util.zip.ZipOutputStream;
038:
039:        import org.apache.commons.logging.Log;
040:        import org.apache.commons.logging.LogFactory;
041:
042:        import websphinx.Access;
043:        import websphinx.Crawler;
044:        import websphinx.DownloadParameters;
045:        import websphinx.Link;
046:        import websphinx.LinkEvent;
047:        import websphinx.LinkListener;
048:        import websphinx.Page;
049:
050:        public class PresentationExport extends Crawler implements  LinkListener {
051:            protected final transient Log logger = LogFactory
052:                    .getLog(getClass());
053:
054:            private PortfolioMirror mirror = null;
055:            private String hostName = null;
056:            private String webappName = null;
057:            private String tempDirectory = null;
058:            public static final int BUFFER = 1024 * 10;
059:            private ArrayList errorLinks = new ArrayList();
060:            private static SessionAccess access = new SessionAccess();
061:
062:            public PresentationExport(String url, String tempDirectory)
063:                    throws IOException {
064:                this .tempDirectory = tempDirectory;
065:
066:                Access.setAccess(access);
067:
068:                URL urlObj = new URL(url);
069:                this .hostName = urlObj.getHost();
070:                String path = urlObj.getPath();
071:
072:                StringTokenizer tok = new StringTokenizer(path, "/", false);
073:
074:                webappName = tok.nextToken();
075:                if (!tok.hasMoreTokens()) {
076:                    webappName = "";
077:                } else {
078:                    webappName = "/" + webappName;
079:                }
080:
081:                mirror = new PortfolioMirror(tempDirectory, webappName);
082:
083:                this .setRootHrefs(url);
084:                this .setLinkType(Crawler.ALL_LINKS);
085:                this .setSynchronous(true);
086:                this .setDomain(Crawler.WEB);
087:                this .addLinkListener(this );
088:
089:                DownloadParameters dp = getDownloadParameters();
090:                dp = dp.changeMaxThreads(1);
091:                setDownloadParameters(dp.changeMaxPageSize(2000));
092:            }
093:
094:            public void createZip(OutputStream out) throws IOException {
095:                File directory = new File(tempDirectory + webappName);
096:
097:                CheckedOutputStream checksum = new CheckedOutputStream(out,
098:                        new Adler32());
099:                ZipOutputStream zos = new ZipOutputStream(
100:                        new BufferedOutputStream(checksum));
101:
102:                recurseDirectory("", directory, zos);
103:
104:                zos.finish();
105:                zos.flush();
106:            }
107:
108:            /**
109:             * places a directory into the zip stream
110:             * @param parentPath
111:             * @param directory
112:             * @param zos
113:             * @throws IOException
114:             */
115:            protected void recurseDirectory(String parentPath, File directory,
116:                    ZipOutputStream zos) throws IOException {
117:                // get all files... go through those
118:                File[] files = directory.listFiles(new DirectoryFileFilter(
119:                        false));
120:
121:                if (files == null)
122:                    throw new NullPointerException(
123:                            "recursing through a directory which is not a directory: "
124:                                    + parentPath + " ---- " + directory);
125:
126:                addFiles(zos, parentPath, files);
127:
128:                // get all directories... go through those...
129:                File[] directories = directory
130:                        .listFiles(new DirectoryFileFilter(true));
131:                for (int i = 0; i < directories.length; i++) {
132:                    recurseDirectory(parentPath + directories[i].getName()
133:                            + "/", directories[i], zos);
134:                }
135:
136:            }
137:
138:            protected void addFiles(ZipOutputStream out, String parentPrefix,
139:                    File[] files) throws IOException {
140:
141:                BufferedInputStream origin = null;
142:
143:                byte data[] = new byte[BUFFER];
144:                for (int i = 0; i < files.length; i++) {
145:                    String fileName = parentPrefix + files[i].getName();
146:                    logger.debug("Adding " + fileName);
147:                    InputStream in = new FileInputStream(files[i]);
148:
149:                    if (in == null)
150:                        throw new NullPointerException();
151:
152:                    origin = new BufferedInputStream(in, BUFFER);
153:
154:                    if (fileName == null)
155:                        throw new NullPointerException();
156:
157:                    ZipEntry entry = new ZipEntry(fileName);
158:                    out.putNextEntry(entry);
159:                    int count;
160:                    while ((count = origin.read(data, 0, BUFFER)) != -1) {
161:                        out.write(data, 0, count);
162:                    }
163:                    out.closeEntry();
164:                    in.close();
165:                }
166:            }
167:
168:            /**
169:             * Start crawling.  Returns either when the crawl is done, or
170:             * when pause() or stop() is called.  Because this method implements the
171:             * java.lang.Runnable interface, a crawler can be run in the
172:             * background thread.
173:             */
174:            public void run() {
175:                super .run();
176:
177:                // process error links
178:                for (Iterator i = errorLinks.iterator(); i.hasNext();) {
179:                    Link link = (Link) i.next();
180:                    visit(link.getPage());
181:                }
182:            }
183:
184:            public synchronized void visit(Page page) {
185:
186:                try {
187:                    mirror.writePage(page);
188:                    mirror.rewrite();
189:                } catch (IOException e) {
190:                    logger
191:                            .info(
192:                                    "Error visiting link.  Most likely broken link.",
193:                                    e);
194:                }
195:
196:                logger.debug("visiting page");
197:                super .visit(page);
198:            }
199:
200:            public synchronized boolean shouldVisit(Link link) {
201:                if (link.getMethod() == Link.POST) {
202:                    return false;
203:                }
204:
205:                if (!link.getHost().equalsIgnoreCase(hostName)) {
206:                    return false;
207:                }
208:
209:                // todo maybe if (link.getURL().getFile().startsWith(webappName + "/showPublicPortfolio.do")) {
210:                //   return false;
211:                //}
212:
213:                return true;
214:            }
215:
216:            public void deleteTemp() {
217:                File temp = new File(tempDirectory);
218:
219:                deleteContent(temp);
220:                temp.delete();
221:            }
222:
223:            protected void deleteContent(File directory) {
224:                File[] files = directory.listFiles(new DirectoryFileFilter(
225:                        false));
226:
227:                if (files != null) {
228:                    for (int i = 0; i < files.length; i++) {
229:                        files[i].delete();
230:                    }
231:                }
232:
233:                // get all directories... go through those...
234:                File[] directories = directory
235:                        .listFiles(new DirectoryFileFilter(true));
236:                if (directories != null) {
237:                    for (int i = 0; i < directories.length; i++) {
238:                        deleteContent(directories[i]);
239:                        directories[i].delete();
240:                    }
241:                }
242:            }
243:
244:            /**
245:             * Notify that an event occured on a link.
246:             */
247:            public void crawled(LinkEvent event) {
248:                if (event.getID() == LinkEvent.ERROR) {
249:                    // switch to stream page link
250:
251:                    if (!(event.getLink().getPage() instanceof  StreamedPage)) {
252:                        logger.debug("loading file through streamed page.");
253:                        Link newLink = new Link(event.getLink().getURL());
254:                        newLink.setPage(new StreamedPage(event.getLink()));
255:                        addErrorLink(newLink);
256:                    } else {
257:                        logger.error("Link error "
258:                                + event.getLink().getURL().toExternalForm(),
259:                                event.getException());
260:                    }
261:                } else if (event.getID() == LinkEvent.QUEUED) {
262:                    if (event.getLink().getPage() instanceof  StreamedPage) {
263:                        event.getLink().setStatus(LinkEvent.DOWNLOADED);
264:                    }
265:                }
266:            }
267:
268:            protected synchronized void addErrorLink(Link newLink) {
269:                errorLinks.add(newLink);
270:            }
271:
272:            /**
273:             * Implements the FileFilter.  it accepts the switch of whether to accept files or directories
274:             *
275:             */
276:            private class DirectoryFileFilter implements  FileFilter {
277:                private boolean directories = false;
278:
279:                public DirectoryFileFilter(boolean directories) {
280:                    this .directories = directories;
281:                }
282:
283:                /**
284:                 * Tests whether or not the specified abstract pathname should be
285:                 * included in a pathname list.
286:                 *
287:                 * @param pathname The abstract pathname to be tested
288:                 * @return <code>true</code> if and only if <code>pathname</code>
289:                 *         should be included
290:                 */
291:                public boolean accept(File pathname) {
292:                    if (directories) {
293:                        return pathname.isDirectory();
294:                    } else {
295:                        return pathname.isFile();
296:                    }
297:                }
298:
299:            }
300:
301:        }
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