public void connect() {
try {
lookup = Simon.createNameLookup(this.host, reg_port);
Object obj = lookup.lookup("TimServer");
server = (ITimServer) obj;
server.login(this);
System.out.println("Client connected to and registered of server!");
} catch (Exception e) {
e.printStackTrace();
eventbus.publish(new TimEvent(Tag.INFO, "COULD NOT CONNECT TO SERVER " + this.host));
int answer = JOptionPane.showConfirmDialog(null, ASK_FOR_RECONNECTING);
if (answer == JOptionPane.OK_OPTION) {
connect();
} else {
System.exit(1);
}
}
connected = true;
}
@Override
public void onEvent(TimEvent evt) {
switch (evt.getTag()) {
case SENDFILE:
Image img = this.getFile((String) evt.getObject());
System.out.println("Image downloaded: " + img);
// FIXME easy and dumm check for nullpointerException
if (img != null) {
showPreviewOfPicture(img);
}
break;
case SENDRUNNER:
try {
Lookup lookup = Simon.createNameLookup(SERVER_HOST, REG_PORT);
ITimRunner runner = (ITimRunner) lookup.lookup("TimRunner");
server.submitRunnable(runner);
} catch (Exception e) {
e.printStackTrace();
}
break;
case FILELIST:
String[] filelist = server.listFiles();
eventbus.publish(new TimEvent(Tag.GUIFILELIST, filelist));
break;
case INFO:
System.out.println("Client received INFO-TAG!\n" + evt.getObject());
break;
case CLIENT_SHUTDOWN:
this.shutdown();
default:
System.out.println("Client received unknown Tag on Event-Bus!");
}
}
/**
* Tries to download the specified file from absolute path to file (input parameter). Tries to
* read the file as an Image! Publishes to the event bus if exception occurs and might return
* null!
*
* @returns requested Image. Returns null in case of Exception!
*/
public Image getFile(String name) {
if (!connected) {
eventbus.publish(new TimEvent(Tag.INFO, ASK_FOR_RECONNECTING));
return null;
} else {
final File file; // a temp file
final byte[] file_bytes;
try {
file_bytes = server.serveFile(name);
file = File.createTempFile(name, null); // "name.tmp"
FileOutputStream fOut = new FileOutputStream(file);
fOut.write(file_bytes);
fOut.close();
} catch (Exception e) {
e.printStackTrace();
eventbus.publish(new TimEvent(Tag.INFO, "Cannot receive file"));
return null;
}
Image img = null;
try {
img = null;
img = ImageIO.read(file);
} catch (IOException e) {; // just return the img = null!
}
if (img != null) {
return img;
} else {
// Ask user for save file!
JFileChooser save_choose = new JFileChooser(new File(System.getProperty("user.dir")));
save_choose.setDialogTitle("Save as...");
int choice = save_choose.showSaveDialog(null);
if (choice == JFileChooser.APPROVE_OPTION) {
FileOutputStream fOut = null;
try {
fOut = new FileOutputStream(save_choose.getSelectedFile());
fOut.write(file_bytes);
fOut.flush();
fOut.close();
eventbus.publish(
new TimEvent(
Tag.INFO,
"File "
+ name
+ " downloaded and saved to "
+ save_choose.getSelectedFile().getName()));
return null;
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
eventbus.publish(
new TimEvent(Tag.INFO, "File " + name + " downloaded but could not be saved!"));
return null;
}
} else {
eventbus.publish(new TimEvent(Tag.INFO, "File " + name + " downloaded but not saved "));
return null;
}
}
}
}