Revision 5245 branches/MULTITHREADING_DEVELOPMENT/libraries/libRemoteServices/src/org/gvsig/remoteClient/taskplanning/retrieving/RequestManager.java
| RequestManager.java | ||
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import java.io.File; |
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import java.net.MalformedURLException; |
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import java.util.Hashtable;
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import java.util.ArrayList;
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import java.util.TreeMap; |
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import java.util.Vector; |
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import org.gvsig.remoteClient.taskplanning.IQueue; |
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import org.gvsig.remoteClient.taskplanning.IRunnableTask; |
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/** |
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* pa administrar les tasques (la hist?ria aquella |
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public URLRetrieveTask addURLRequest(URLRequest request, RetrieveListener listener) {
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try {
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// TODO canviar per a quetorne el Request antic, que la request guarde el |
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// seu estat aix? com la llista de listeners |
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File f = getPreviousDownloadedURLRequest(request); |
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if (f!=null) {
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// The file was already requested and it is in the cache or |
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// the download is in process |
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if (downloadedFiles.contains(request)) {
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for (int i = 0; i < downloadedFiles.size(); i++) {
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URLRequest r = (URLRequest) downloadedFiles.get(i); |
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if (r.equals(request)) {
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request = r; |
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break; |
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} |
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} |
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// Overwrite the file name with the file in the cache's one. |
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request.setFileName(f.getAbsolutePath()); |
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System.out.println(request.getUrl()+" is cached at '"+f.getAbsolutePath()+"'"); |
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System.out.println(request.getUrl()+" is cached at '"+request.getFileName()+"'"); |
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// get this server's task queue |
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RetrieveQueue serverQueue = (RetrieveQueue) getQueue(request.getHost()); |
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// Look up the previous cached jobs |
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URLRetrieveTask workingTask = serverQueue.getURLPreviousRequest(request); |
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if (workingTask == null) {
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// Task already done. Notify listener |
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if (debug) |
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System.err.println("done job found: "+request.getUrl());
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RetrieveEvent event = new RetrieveEvent(); |
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event.setType(RetrieveEvent.REQUEST_FINISHED); |
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listener.transferEventReceived(event); |
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synchronized (this) {
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if (request.getStatus() == RetrieveEvent.REQUEST_FINISHED) {
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if (debug) |
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System.err.println("done job found: "+request.getUrl());
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RetrieveEvent event = new RetrieveEvent(); |
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event.setType(RetrieveEvent.REQUEST_FINISHED); |
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listener.transferEventReceived(event); |
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} else if (request.getStatus() == RetrieveEvent.REQUEST_CANCELLED) {
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removeURLRequest(request); |
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return addURLRequest(request, listener); |
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} else {
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if (debug) |
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System.err.println("working job found: "+request.getUrl());
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request.lock(); |
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request.addRetrieveListener(listener); |
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request.unlock(); |
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} |
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} else {
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// The task is working yet, will register the listener |
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// TODO no va b?... perqu? la cola va buidant-se molt r?pidament |
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// per a fer que vaja tamb? hi hauria que registrar en cache |
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// lo que s'est? baixant al principi de l'execute(); |
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if (debug) |
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System.err.println("working job found: "+request.getUrl());
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workingTask.addRetrieveListener(listener); |
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} |
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} else {
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// Pick an unrepeatable fileName |
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if (fileName.startsWith(fileNamePrefix)) |
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fileName = fileName.substring(fileNamePrefix.length(), fileName.length()); |
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// get this server's task queue |
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RetrieveQueue serverQueue = (RetrieveQueue) getQueue(request.getHost()); |
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fileName = fileNamePrefix + fileName; |
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request.setFileName(fileName); |
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synchronized (this) {
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addDownloadedURLRequest(request); |
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} |
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// TODO |
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// jo ac? comprovaria quin protocol, m?tode, host, etc... i crearia un |
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// objecte que tractara la desc?rrega segons el m?tode que li toca. |
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// serverQueue.put(new SMBRetrieveTask(request, listener)); |
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// Enqueue the request and the listener will be notified when done. |
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URLRetrieveTask task = new URLRetrieveTask(request, listener); |
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request.addRetrieveListener(listener); |
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URLRetrieveTask task = new URLRetrieveTask(request); |
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return (URLRetrieveTask) serverQueue.put(task); |
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} |
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// // TODO canviar per a quetorne el Request antic, que la request guarde el |
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// // seu estat aix? com la llista de listeners |
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// File f = getPreviousDownloadedURLRequest(request); |
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// |
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// if (f!=null) {
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// // The file was already requested and it is in the cache or |
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// // the download is in process |
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// |
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// // Overwrite the file name with the file in the cache's one. |
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// request.setFileName(f.getAbsolutePath()); |
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// System.out.println(request.getUrl()+" is cached at '"+f.getAbsolutePath()+"'"); |
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// |
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// |
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// // get this server's task queue |
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// RetrieveQueue serverQueue = (RetrieveQueue) getQueue(request.getHost()); |
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// |
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// // Look up the previous cached jobs |
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// |
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// URLRetrieveTask workingTask = serverQueue.getURLPreviousRequest(request); |
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// if (workingTask == null) {
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// // Task already done. Notify listener |
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// if (debug) |
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// System.err.println("done job found: "+request.getUrl());
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// RetrieveEvent event = new RetrieveEvent(); |
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// event.setType(RetrieveEvent.REQUEST_FINISHED); |
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// listener.transferEventReceived(event); |
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// |
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// } else {
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// // The task is working yet, will register the listener |
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// |
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// // TODO no va b?... perqu? la cola va buidant-se molt r?pidament |
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// // per a fer que vaja tamb? hi hauria que registrar en cache |
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// // lo que s'est? baixant al principi de l'execute(); |
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// if (debug) |
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// System.err.println("working job found: "+request.getUrl());
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// workingTask.addRetrieveListener(listener); |
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// |
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// } |
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// } else {
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// // Pick an unrepeatable fileName |
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// String host = request.getHost(); |
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// String fileName = request.getFileName(); |
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// File tempDir = new File(tempDirectoryPath); |
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// if (!tempDir.exists()) |
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// tempDir.mkdir(); |
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// String fileNamePrefix = tempDirectoryPath + |
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// File.separator + host + |
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// "-" ; |
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// if (fileName.startsWith(fileNamePrefix)) |
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// fileName = fileName.substring(fileNamePrefix.length(), fileName.length()); |
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// |
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// // get this server's task queue |
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// RetrieveQueue serverQueue = (RetrieveQueue) getQueue(request.getHost()); |
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// |
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// |
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// fileName = fileNamePrefix + fileName; |
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// |
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// request.setFileName(fileName); |
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// |
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// // TODO |
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// // jo ac? comprovaria quin protocol, m?tode, host, etc... i crearia un |
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// // objecte que tractara la desc?rrega segons el m?tode que li toca. |
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// // algo en plan Strategy's |
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// // |
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// // per exemple si fem URLRetrieveTask una abstracta i tenim |
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// // |
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// // GET de tota la vida |
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// // serverQueue.put(new HTTPGetRetrieveTask(request, listener)); |
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// // |
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// // POST |
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// // serverQueue.put(new HTTPPostRetrieveTask(request, listener)); |
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// // |
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// // FTP |
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// // serverQueue.put(new FTPRetrieveTask(request, listener)); |
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// // |
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// // ????Xarxa local????? |
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// // serverQueue.put(new SMBRetrieveTask(request, listener)); |
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// |
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// // Enqueue the request and the listener will be notified when done. |
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// URLRetrieveTask task = new URLRetrieveTask(request, listener); |
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// return (URLRetrieveTask) serverQueue.put(task); |
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// } |
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} catch (MalformedURLException e) {
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e.printStackTrace(); |
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} |
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} |
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private Hashtable downloadedFiles;
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private Vector downloadedFiles = new Vector();
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private final String tempDirectoryPath = System.getProperty("java.io.tmpdir")+"tmp-andami";
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/** |
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* Remove an URL from the system cache. The file will remain in the file |
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* @param request |
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*/ |
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public void removeURLRequest(URLRequest request) {
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if (downloadedFiles != null && downloadedFiles.containsKey(request))
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if (downloadedFiles != null && downloadedFiles.contains(request)) |
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downloadedFiles.remove(request); |
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} |
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/** |
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* @param url |
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* @param filePath |
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*/ |
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protected void addDownloadedURLRequest(URLRequest request, String filePath){
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if (downloadedFiles==null) |
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downloadedFiles = new Hashtable(); |
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String fileName = (String) downloadedFiles.put(request, filePath); |
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if (fileName!=null){
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File f = new File(fileName); |
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if (f.exists()) |
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f.delete(); |
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protected void addDownloadedURLRequest(URLRequest request){
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if (!downloadedFiles.contains(request)) {
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downloadedFiles.add(request); |
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} else {
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System.out.println("NOT ADDED");
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} |
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// |
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// String fileName = request.getFileName(); |
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// if (fileName!=null){
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// File f = new File(fileName); |
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// if (f.exists()) |
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// f.delete(); |
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// } |
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} |
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/** |
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* Returns the content of this URL as a file from the file system.<br> |
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* <p> |
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* If the URL has been already downloaded in this session and notified |
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* to the system using the static <b>Utilities.addDownloadedURL(URL)</b> |
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* method, it can be restored faster from the file system avoiding to |
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* download it again. |
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* </p> |
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* @param url |
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* @return File containing this URL's content or null if no file was found. |
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*/ |
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private File getPreviousDownloadedURLRequest(URLRequest request){
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File f = null; |
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if (downloadedFiles!=null && downloadedFiles.containsKey(request)){
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String filePath = (String) downloadedFiles.get(request); |
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f = new File(filePath); |
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} |
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return f; |
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} |
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} |
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