StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POApache Commons Net FTPClient abort file store
text
Body
copied!<p>I'm developing an applet to allow FTP upload from a webapp...</p> <p>The send operation is working fine, but I'd like to able to cancel a file storing in progress.</p> <p>I'm not very fluent with threads. My first attempt was to call ftp.abort() in the cancel thread, but the abort method was only called when the storeFile method finished, like if the send thread was locking the ftp object.</p> <p>So I changed the code to interrupt the send thread and check it in the copy stream listener. The file storing stops as expected, but ftp.abort() call hangs the application, it never complete.</p> <p>Any ideas?</p> <p>Thanks, Philip</p> <p><strong>Send operation:</strong></p> <pre><code> botaoEnviar.setEnabled(false); botaoCancelar.setEnabled(true); textField.requestFocus(); threadEnvio = new Thread(new Runnable() { @Override public void run() { FileInputStream fis = null; try { if(arquivoSelecionado == null) { throw new IllegalArgumentException("Arquivo deve ser informado"); } try { ftp = new FTPClient(); ftp.connect("192.168.1.243"); } catch(Exception e) { throw new FtpConnectionException("Não foi possível conectar no servidor FTP", e); } if(!ftp.login("c001", "0AJF2J36")) { throw new IllegalArgumentException("Não foi possível autenticar no servidor FTP"); } ftp.setFileType(FTPClient.BINARY_FILE_TYPE); ftp.setCopyStreamListener(new CopyStreamAdapter() { @Override public void bytesTransferred(long totalBytesTransferred, int bytesTransferred, long streamSize) { if(threadEnvio.isInterrupted()) { try { ftp.abort(); } catch(IOException ex) { handleException(ex); } } else { int percent = (int) (totalBytesTransferred * 100 / arquivoSelecionado.length()); progressBar.setValue(percent); } } }); fis = new FileInputStream(arquivoSelecionado); if(ftp.storeFile(arquivoSelecionado.getName(), fis)) { JOptionPane.showMessageDialog(null, "Arquivo enviado com suceso"); } else { JOptionPane.showMessageDialog(null, "Não foi possível enviar o arquivo", "Erro", JOptionPane.ERROR_MESSAGE); } ftp.logout(); } catch(Exception e) { handleException(e); } finally { if(fis != null) { try { fis.close(); } catch(IOException ex) { handleException(ex); } } if(ftp != null) { try { ftp.disconnect(); } catch(IOException ex) { handleException(ex); } } progressBar.setValue(0); botaoEnviar.setEnabled(true); botaoCancelar.setEnabled(false); } } }); threadEnvio.start(); </code></pre> <p><strong>Cancel operation:</strong></p> <pre><code>botaoCancelar.setEnabled(false); new Thread(new Runnable() { @Override public void run() { try { threadEnvio.interrupt(); } catch(Exception ex) { handleException(ex); } finally { botaoCancelar.setEnabled(true); } } }).start(); </code></pre>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload