`/* * * Copyright (C) 2006 Enterprise Distributed Technologies Ltd * * www.enterprisedt.com */ import java.io.File; import com.enterprisedt.net.ftp.EventAdapter; import com.enterprisedt.net.ftp.FTPTransferCancelledException; import com.enterprisedt.net.ftp.FileTransferClient; import com.enterprisedt.net.ftp.WriteMode; import com.enterprisedt.util.debug.Level; import com.enterprisedt.util.debug.Logger; public class PauseResumeTransfers { public static void main(String[] args) { // we want remote host, user name and password if (args.length < 3) { System.out .println("Usage: run remote-host username password"); System.exit(1); } // extract command-line arguments String host = args[0]; String username = args[1]; String password = args[2]; // set up logger so that we get some output Logger log = Logger.getLogger(PauseResumeTransfers.class); Logger.setLevel(Level.INFO); FileTransferClient ftp = null; try { // create client log.info("Creating FTP client"); ftp = new FileTransferClient(); // set remote host ftp.setRemoteHost(host); ftp.setUserName(username); ftp.setPassword(password); // set up listener CancelListener cl = new CancelListener(ftp); ftp.setEventListener(cl); // the transfer notify interval must be greater than buffer size ftp.getAdvancedSettings().setTransferBufferSize(500); ftp.getAdvancedSettings().setTransferNotifyInterval(1000); // connect to the server log.info("Connecting to server " + host); ftp.connect(); log.info("Connected and logged in to server " + host); log.info("Uploading file"); String name = "PauseResumeTransfers.java"; // the upload will be interrupted by the listener - it will call // cancelAllTransfers(). We catch the expected exception. try { ftp.uploadFile(name, name); } catch (FTPTransferCancelledException ex) { log.debug("Transfer cancelled"); } int len = (int) ftp.getSize(name); File file = new File(name); log.info("Bytes transferred=" + cl.getBytesTransferred()); log.info("File partially uploaded (localsize=" + file.length() + " remotesize=" + len); log.info("Completing upload by resuming"); ftp.uploadFile(name, name, WriteMode.RESUME); len = (int) ftp.getSize(name); // only the remaining bytes are transferred as can be seen log.info("Bytes transferred=" + cl.getBytesTransferred()); log.info("File uploaded (localsize=" + file.length() + " remotesize=" + len); // now delete remote file ftp.deleteFile(name); // Shut down client log.info("Quitting client"); ftp.disconnect(); log.info("Example complete"); } catch (Exception e) { e.printStackTrace(); } } } /** * As soon it receives notification of bytes transferred, it cancels the * transfer */ class CancelListener extends EventAdapter { private Logger log = Logger.getLogger(CancelListener.class); /** * True if cancelled */ private boolean cancelled = false; /** * Keep the last reported byte count */ private long bytesTransferred = 0; /** * FTPClient reference */ private FileTransferClient ftp; /** * Constructor * * @param ftp */ public CancelListener(FileTransferClient ftp) { this.ftp = ftp; } public void bytesTransferred(String connId, String remoteFilename, long bytes) { log.info("Bytes transferred=" + bytes); if (!cancelled) { ftp.cancelAllTransfers(); cancelled = true; } bytesTransferred = bytes; } /** * Will contain the total bytes transferred once the transfer is complete */ public long getBytesTransferred() { return bytesTransferred; } }`