Examples of io.netty.channel.DefaultFileRegion

io.netty.channel.DefaultFileRegion
Default {@link FileRegion} implementation which transfer data from a {@link FileChannel}.


        // Write the content.
        ChannelFuture sendFileFuture;
        if (ctx.pipeline().get(SslHandler.class) == null) {
            sendFileFuture =
                    ctx.write(new DefaultFileRegion(raf.getChannel(), 0, fileLength), ctx.newProgressivePromise());
        } else {
            sendFileFuture =
                    ctx.write(new HttpChunkedInput(new ChunkedFile(raf, 0, fileLength, 8192)),
                            ctx.newProgressivePromise());
        }

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        }


        ctx.write("OK: " + raf.length() + '\n');
        if (ctx.pipeline().get(SslHandler.class) == null) {
            // SSL not enabled - can use zero-copy file transfer.
            ctx.write(new DefaultFileRegion(raf.getChannel(), 0, length));
        } else {
            // SSL enabled - cannot use zero-copy file transfer.
            ctx.write(new ChunkedFile(raf));
        }
        ctx.writeAndFlush("\n");

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                // was not able to write everything so break here we will get notified later again once
                // the network stack can handle more writes.
                return false;
            }
        } else if (msg instanceof DefaultFileRegion) {
            DefaultFileRegion region = (DefaultFileRegion) msg;
            if (!writeFileRegion(in, region)) {
                // was not able to write everything so break here we will get notified later again once
                // the network stack can handle more writes.
                return false;
            }

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        // Cannot use zero-copy
        writeFuture = writeToChannel(new ChunkedFile(raf, 0, fileLength, 8192));
      } else {
        // No encryption - use zero-copy.
        final FileRegion region =
            new DefaultFileRegion(raf.getChannel(), 0, fileLength);
        writeFuture = writeToChannel(region);
      }
      writeFuture.addListener(new ChannelFutureListener() {
        public void operationComplete(ChannelFuture future) throws Exception {
          raf.close();

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  }


  @Override
  public Object convertToNetty() throws IOException {
    FileChannel fileChannel = new FileInputStream(file).getChannel();
    return new DefaultFileRegion(fileChannel, offset, length);
  }

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        try {
            ChannelFuture writeFuture;
            if (ChannelManager.isSslHandlerConfigured(channel.pipeline()) || nettyConfig.isDisableZeroCopy()) {
                writeFuture = channel.write(new ChunkedFile(raf, offset, length, nettyConfig.getChunkedFileChunkSize()), channel.newProgressivePromise());
            } else {
                FileRegion region = new DefaultFileRegion(raf.getChannel(), offset, length);
                writeFuture = channel.write(region, channel.newProgressivePromise());
            }
            writeFuture.addListener(new ProgressListener(config, future.getAsyncHandler(), future, false, getContentLength()) {
                public void operationComplete(ChannelProgressiveFuture cf) {
                    closeSilently(raf);

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 * @author <a href="mailto:nmaurer@redhat.com">Norman Maurer</a>
 */
public class DefaultFileRegionUsage {
    public static void transfer(Channel channel, File file) throws FileNotFoundException {
        FileInputStream in = new FileInputStream(file);
        FileRegion region = new DefaultFileRegion(in.getChannel(), 0, file.length());


        channel.writeAndFlush(region).addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                if (!future.isSuccess()) {

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                    msg.getLength());
            out.add(Unpooled.wrappedBuffer(data));
            msg.getChannel().close();
            break;
          case TRANSFER:
            out.add(new DefaultFileRegion(msg.getChannel(), msg.getOffset(), msg.getLength()));
            break;
          default:
            throw new AssertionError("Unknown file transfer type: "
                + WorkerConf.get().NETTY_FILE_TRANSFER_TYPE);
        }

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        if (ch.pipeline().get(SslHandler.class) != null) {
            // Cannot use zero-copy with HTTPS.
            writeFuture = ch.write(new ChunkedFile(raf, 0, fileLength, 8192));
        } else {
            // No encryption - use zero-copy.
            final FileRegion region = new DefaultFileRegion(raf.getChannel(), 0, fileLength);
            writeFuture = ch.write(region);
            writeFuture.addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    region.release();
                }
            });
        }


        writeFuture.addListener(ChannelFutureListener.CLOSE);

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        // Write the content.
        ChannelFuture sendFileFuture;
        if (ctx.pipeline().get(SslHandler.class) == null) {
            sendFileFuture =
                    ctx.write(new DefaultFileRegion(raf.getChannel(), 0, fileLength), ctx.newProgressivePromise());
        } else {
            sendFileFuture =
                    ctx.write(new HttpChunkedInput(new ChunkedFile(raf, 0, fileLength, 8192)),
                            ctx.newProgressivePromise());
        }

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