ByteBuf.setBytes

Transfers the content of the specified source stream to this buffer starting at the specified absolute {@code index}. This method does not modify {@code readerIndex} or {@code writerIndex} of this buffer.

@param length the number of bytes to transfer

@return the actual number of bytes read in from the specified channel. {@code -1} if the specified channel is closed.

@throws IndexOutOfBoundsException if the specified {@code index} is less than {@code 0} or if {@code index + length} is greater than {@code this.capacity} @throws IOException if the specified stream threw an exception during I/O

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