Examples of java.nio.channels.FileChannel.transferFrom()

java.nio.channels.FileChannel.transferFrom()
Transfers bytes into this channel's file from the given readable byte channel. It may be very efficient. By invoking this methid, it will read form the source channel and write into the file channel. Note: no guarantee whether all bytes may be transferred. And it does not modify the position of the channel. @param src the source channel to read @param position the non-negative position to begin @param count the non-negative bytes to be transferred @return the number of bytes that are transferred. @throws IllegalArgumentException If the parameters are not correct @throws NonReadableChannelException If the source channel is not readable @throws NonWritableChannelException If this channel is not writable @throws ClosedChannelException If either channel has already been closed @throws AsynchronousCloseException If either channel is closed by other threads during this operation @throws ClosedByInterruptException If the thread is interrupted during this operation @throws IOException If any I/O error occurs

          ioe.toString();
        };
      }
    };
    t.start();
    long transfered = fc.transferFrom(clientChannel, 0, 9000000);
    fc.close();
    raf.close();
    Assert.assertEquals(txt.length(), transfered);
    Assert.assertTrue(QAUtil.isEquals(file, txt));
    Assert.assertFalse(clientChannel.isOpen());

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    serverChannel.write(txt);
    serverChannel.flush();
    serverChannel.close();
    QAUtil.sleep(200);
    
    long transfered = fc.transferFrom(clientChannel, 0, 9000000);
    fc.close();
    raf.close();
    
    Assert.assertEquals(txt.length(), transfered);
    Assert.assertTrue(QAUtil.isEquals(file, txt));

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    QAUtil.sleep(200);
    
    clientChannel.close();
    
    try {
      fc.transferFrom(clientChannel, 0, 9000000);
      Assert.fail("ClosedChannelException expected");
    } catch (ClosedChannelException expected) { }
    
    file.delete();
    server.close();

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    QAUtil.sleep(200);
    
    clientChannel.close();
    
    try {
      fc.transferFrom(clientChannel, 0, 9000000);
      Assert.fail("ClosedChannelException expected");
    } catch (ClosedChannelException expected) { }
    
    file.delete();
    server.close();

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            FileChannel fromCh = in.getChannel();
            FileChannel toCh = out.getChannel();
            long size = fromCh.size();
            long toCopy = size;
            while (toCopy > 0) {
                toCopy -= toCh.transferFrom(fromCh, size - toCopy, toCopy);
            }
        } finally {
            try {
                in.close();
            } catch (IOException e) {

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        {
            in = new FileInputStream(src);
            out = new FileOutputStream(target);
            FileChannel inCh = in.getChannel();
            FileChannel outCh = out.getChannel();
            if (outCh.transferFrom(inCh, 0, src.length()) == src.length())
            {
                // adjust timestamp
                target.setLastModified(src.lastModified());
                flag = true;
            }

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      FileChannel destination = null;


      try {
          source = new FileInputStream(sourceFile).getChannel();
          destination = new FileOutputStream(destFile).getChannel();
          destination.transferFrom(source, 0, source.size());
      }
      finally {
          if(source != null) {
              source.close();
          }

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        FileChannel source = null;
        FileChannel destination = null;
        try {
            source = new FileInputStream(sourceFile).getChannel();
            destination = new FileOutputStream(destFile).getChannel();
            destination.transferFrom(source, 0, source.size());
        } finally {
            if(source != null) {
                source.close();
            }
            if(destination != null) {

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            long pos = 0;
            long count = 0;
            while (pos < size) {
                final long remain = size - pos;
                count = remain > FILE_COPY_BUFFER_SIZE ? FILE_COPY_BUFFER_SIZE : remain;
                final long bytesCopied = output.transferFrom(input, pos, count);
                if (bytesCopied == 0) { // IO-385 - can happen if file is truncated after caching the size
                    break; // ensure we don't loop forever
                }
                pos += bytesCopied;
            }

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                long length = section.right - section.left;
                long bytesRead = 0;
                while (bytesRead < length)
                {
                    long toRead = Math.min(FileStreamTask.CHUNK_SIZE, length - bytesRead);
                    long lastRead = fc.transferFrom(socketChannel, offset + bytesRead, toRead);
                    // if the other side fails, we will not get an exception, but instead transferFrom will constantly return 0 byte read
                    // and we would thus enter an infinite loop. So intead, if no bytes are tranferred we assume the other side is dead and 
                    // raise an exception (that will be catch belove and 'the right thing' will be done).
                    if (lastRead == 0)
                        throw new IOException("Transfer failed for remote file " + remoteFile);

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