Examples of java.nio.channels.WritableByteChannel

java.nio.channels.WritableByteChannel
A WriteableByteChannel is a type of Channel that can write bytes.
Writes are synchronous on a WriteableByteChannel, that is, if a write is already in progress on the channel then subsequent writes will block until the first write completes. It is undefined whether non-write operations will block.

                    }
                    sd.fchannel = new FileInputStream(f).getChannel();
                }
                sc = attachment.getChannel();
                sc.setSendFile(true);
                WritableByteChannel wc = ((sc instanceof SecureNioChannel)?sc:sc.getIOChannel());
                
                if (sc.getOutboundRemaining()>0) {
                    if (sc.flushOutbound()) {
                        attachment.access();
                    }

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        }


        if (resource != null) {
            if (resource.userAgentNeedsUpdate(context)) {
                ReadableByteChannel resourceChannel = null;
                WritableByteChannel out = null;
                ByteBuffer buf = allocateByteBuffer();
                try {
                    InputStream in = resource.getInputStream();
                    if (in == null) {
                        send404(context, resourceName, libraryName, true);
                        return;
                    }
                    resourceChannel =
                          Channels.newChannel(in);
                    out = Channels.newChannel(extContext.getResponseOutputStream());
                    extContext.setResponseBufferSize(buf.capacity());
                    String contentType = resource.getContentType();
                    if (contentType != null) {
                        extContext.setResponseContentType(resource.getContentType());
                    }
                    handleHeaders(context, resource);


                    int size = 0;
                    for (int thisRead = resourceChannel.read(buf), totalWritten = 0;
                         thisRead != -1;
                         thisRead = resourceChannel.read(buf)) {


                        buf.rewind();
                        buf.limit(thisRead);
                        do {
                            totalWritten += out.write(buf);
                        } while (totalWritten < size);
                        buf.clear();
                        size += thisRead;


                    }


                    if (!extContext.isResponseCommitted()) {
                        extContext.setResponseContentLength(size);
                    }


                } catch (IOException ioe) {
                    send404(context, resourceName, libraryName, ioe, true);
                } finally {
                    if (out != null) {
                        out.close();
                    }
                    if (resourceChannel != null) {
                        resourceChannel.close();
                    }
                }

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         length = channel.size() - position;
      }


      MappedByteBuffer bb = channel.map(FileChannel.MapMode.READ_ONLY, position, length);


      WritableByteChannel ch;
      if (stream instanceof FileOutputStream)
      {
         ch = ((FileOutputStream)stream).getChannel();
      }
      else
      {
         ch = Channels.newChannel(stream);
      }
      ch.write(bb);
      ch.close();


      return length;
   }

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            if (position + length >= spoolChannel.size())
               length = spoolChannel.size() - position;


            MappedByteBuffer bb = spoolChannel.map(FileChannel.MapMode.READ_ONLY, position, length);


            WritableByteChannel ch = Channels.newChannel(stream);
            ch.write(bb);
            ch.close();


            return length;
         }
      }

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    }


    public static void fastChannelCopy(final InputStream in, final OutputStream out) throws IOException {


        final ReadableByteChannel src = Channels.newChannel(in);
        final WritableByteChannel dest = Channels.newChannel(out);


        try {
            final ByteBuffer buffer = ByteBuffer.allocate(8 * 1024);
            while (src.read(buffer) != -1) {
                buffer.flip();
                dest.write(buffer);
                buffer.compact();
            }
            buffer.flip();


            while (buffer.hasRemaining()) {
                dest.write(buffer);
            }
        } finally {
            safeClose(src);
            safeClose(dest);
        }

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                //configure output channel
                sc = attachment.getChannel();
                sc.setSendFile(true);
                //ssl channel is slightly different
                WritableByteChannel wc = ((sc instanceof SecureNioChannel)?sc:sc.getIOChannel());


                //we still have data in the buffer
                if (sc.getOutboundRemaining()>0) {
                    if (sc.flushOutbound()) {
                        attachment.access();

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     * @param decoder the content decoder in use
     */
    public void inputReady(final NHttpServerConnection conn, final ContentDecoder decoder) {


        HttpContext context = conn.getContext();
        WritableByteChannel sink = (WritableByteChannel) context.getAttribute(REQUEST_SINK_CHANNEL);
        ByteBuffer inbuf = (ByteBuffer) context.getAttribute(REQUEST_BUFFER);


        try {
            while (decoder.read(inbuf) > 0) {
                inbuf.flip();
                sink.write(inbuf);
                inbuf.compact();
            }


            if (decoder.isCompleted()) {
                sink.close();
            }


        } catch (IOException e) {
            handleException("I/O Error : " + e.getMessage(), e, conn);
        }

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     * @param decoder the content decoder in use
     */
    public void inputReady(final NHttpClientConnection conn, final ContentDecoder decoder) {
        HttpContext context = conn.getContext();
        HttpResponse response = conn.getHttpResponse();
        WritableByteChannel sink = (WritableByteChannel) context.getAttribute(RESPONSE_SINK_CHANNEL);
        ByteBuffer inbuf = (ByteBuffer) context.getAttribute(REQUEST_BUFFER);


        try {
            while (decoder.read(inbuf) > 0) {
                inbuf.flip();
                sink.write(inbuf);
                inbuf.compact();
            }


            if (decoder.isCompleted()) {
                if (sink != null) sink.close();
                if (!connStrategy.keepAlive(response, context)) {
                    conn.close();
                } else {
                    ConnectionPool.release(conn);
                }

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  }


  @Override
  public ByteBuf setBytes(int index, ByteBuffer src) {
    try {
      WritableByteChannel channel = Channels.newChannel(output);


      channel.write(src);
      return this;
    } catch (IOException e) {
      throw new RuntimeException("Cannot write output.", e);
    }
  }

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  }


  @Override
  public int setBytes(int index, ScatteringByteChannel in, int length) throws IOException {
    ByteBuffer buffer = ByteBuffer.allocate(length);
    WritableByteChannel channel = Channels.newChannel(output);
    
    int count = in.read(buffer);
    channel.write(buffer);
    return count;
  }

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