public boolean start() {
try {
prepareCache();
ServerSocket serverSocket = null;
int port = configuration.getCommandPort();
// Trying to find a port available
while (serverSocket == null) {
try {
serverSocket = new ServerSocket(port);
LOG.info("FTPServer started on port '" + port + "'");
} catch (BindException e) {
LOG.warn(
"Cannot launch the FTPServer on '" + (port++) + "', we try the next port number");
}
}
dataChannelManager = new FtpDataChannelManagerImpl(configuration);
acceptThread = new FtpAcceptThread(this, serverSocket);
acceptThread.start();
return true;
} catch (Exception exc) {
LOG.info("Unhandled exception. " + exc.getMessage(), exc);
}
return false;
}
protected void prepareCache() {
String cacheFolderName = configuration.getCacheFolderName();
File cacheFolder = new File(cacheFolderName);
if (!PrivilegedFileHelper.exists(cacheFolder)) {
LOG.info("Cache folder not exist. Try to create it...");
PrivilegedFileHelper.mkdirs(cacheFolder);
}
String[] cacheFiles = PrivilegedFileHelper.list(cacheFolder);
if (cacheFiles == null) {
LOG.info("No cache file in cache folder!");
return;
}
for (String cacheFile : cacheFiles) {
if (cacheFile.endsWith(FtpConst.FTP_CACHEFILEEXTENTION)) {
File file = new File(cacheFolderName + "/" + cacheFile);
PrivilegedFileHelper.delete(file);
}
}
}