Examples of io.netty.buffer.ByteBuf.nioBuffer()

io.netty.buffer.ByteBuf.nioBuffer()
Exposes this buffer's readable bytes as an NIO {@link ByteBuffer}. The returned buffer shares the content with this buffer, while changing the position and limit of the returned NIO buffer does not affect the indexes and marks of this buffer. This method is identical to {@code buf.nioBuffer(buf.readerIndex(), buf.readableBytes())}. This method does not modify {@code readerIndex} or {@code writerIndex} of this buffer. Please note that thereturned NIO buffer will not see the changes of this buffer if this buffer is a dynamic buffer and it adjusted its capacity. @throws UnsupportedOperationException if this buffer cannot create a {@link ByteBuffer} that shares the content with itself @see #nioBufferCount() @see #nioBuffers() @see #nioBuffers(int,int)


        final int messageSize = byteBuf.readableBytes();


        final long writtenBytes;
        if (byteBuf.nioBufferCount() == 1) {
            writtenBytes = javaChannel().write(byteBuf.nioBuffer());
        } else {
            writtenBytes = javaChannel().write(byteBuf.nioBuffers());
        }


        // did not write the message

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                needsCopy = true;
            }
        }
        ByteBuffer nioData;
        if (!needsCopy) {
            nioData = data.nioBuffer();
        } else {
            data = alloc.directBuffer(dataLen).writeBytes(data);
            nioData = data.nioBuffer();
        }
        final MessageInfo mi = MessageInfo.createOutgoing(association(), null, packet.streamIdentifier());

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        ByteBuffer nioData;
        if (!needsCopy) {
            nioData = data.nioBuffer();
        } else {
            data = alloc.directBuffer(dataLen).writeBytes(data);
            nioData = data.nioBuffer();
        }
        final MessageInfo mi = MessageInfo.createOutgoing(association(), null, packet.streamIdentifier());
        mi.payloadProtocolID(packet.protocolIdentifier());
        mi.streamNumber(packet.streamIdentifier());

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                }
                ByteBuf buffer = allocHandle.allocate(config().getAllocator());
                boolean free = true;


                try {
                    ByteBuffer data = buffer.nioBuffer(buffer.writerIndex(), buffer.writableBytes());
                    MessageInfo messageInfo = ch.receive(data, null, notificationHandler);
                    if (messageInfo == null) {
                        return readMessages;
                    }

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                ByteBuf data = packet.content();
                int dataLen = data.readableBytes();
                ByteBuffer nioData;


                if (data.nioBufferCount() != -1) {
                    nioData = data.nioBuffer();
                } else {
                    nioData = ByteBuffer.allocate(dataLen);
                    data.getBytes(data.readerIndex(), nioData);
                    nioData.flip();
                }

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              break;
            case DATA_PAGE:
              valueReadSoFar += pageHeader.data_page_header.getNum_values();
              ByteBuf buf = allocator.buffer(pageHeader.compressed_page_size);
              lastPage = buf;
              ByteBuffer buffer = buf.nioBuffer(0, pageHeader.compressed_page_size);
              CompatibilityUtil.getBuf(in, buffer, pageHeader.compressed_page_size);
              return new Page(
                      decompressor.decompress(BytesInput.from(buffer, 0, pageHeader.compressed_page_size), pageHeader.getUncompressed_page_size()),
                      pageHeader.data_page_header.num_values,
                      pageHeader.uncompressed_page_size,

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  @Override
  public ByteBuffer allocate(int sz) {
    ByteBuf bb = oContext.getAllocator().buffer(sz);
    ByteBuffer b = bb.nioBuffer(0, sz);
    allocatedBuffers.put(System.identityHashCode(b), bb);
    logger.debug("ParquetDirectByteBufferAllocator: Allocated "+sz+" bytes. Allocated ByteBuffer id: "+System.identityHashCode(b));
    return b;
  }

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        final int oldPos = packet.position();
        if (wantsInboundHeapBuffer && packet.isDirect()) {
            newPacket = ctx.alloc().heapBuffer(packet.limit() - oldPos);
            newPacket.writeBytes(packet);
            oldPacket = packet;
            packet = newPacket.nioBuffer();
        } else {
            oldPacket = null;
            newPacket = null;
        }

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    ByteBuf buf = buffer.getByteBuf();
    if (buf.nioBufferCount() > 1) {
      Iterator<ByteBuffer> buffers = Arrays.asList(buf.nioBuffers()).iterator();
      doWrite(buffers, position, handler);
    } else {
      ByteBuffer bb = buf.nioBuffer();
      doWrite(bb, position, bb.limit(),  handler);
    }
    return this;
  }

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    ByteBuf buf = buffer.getByteBuf();
    if (buf.nioBufferCount() > 1) {
      Iterator<ByteBuffer> buffers = Arrays.asList(buf.nioBuffers()).iterator();
      doWrite(buffers, writePos, handler);
    } else {
      ByteBuffer bb = buf.nioBuffer();
      doWrite(bb, writePos, bb.limit(), handler);
    }
    writePos += length;
    return this;
  }

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