renameTo() — netty Function Reference

Source Code

codec-http/src/main/java/io/netty/handler/codec/http/multipart/AbstractMemoryHttpData.java lines 249–284

    @Override
    public boolean renameTo(File dest) throws IOException {
        ObjectUtil.checkNotNull(dest, "dest");
        if (byteBuf == null) {
            // empty file
            if (!dest.createNewFile()) {
                throw new IOException("file exists already: " + dest);
            }
            return true;
        }
        int length = byteBuf.readableBytes();
        long written = 0;
        RandomAccessFile accessFile = new RandomAccessFile(dest, "rw");
        try {
            FileChannel fileChannel = accessFile.getChannel();
            try {
                if (byteBuf.nioBufferCount() == 1) {
                    ByteBuffer byteBuffer = byteBuf.nioBuffer();
                    while (written < length) {
                        written += fileChannel.write(byteBuffer);
                    }
                } else {
                    ByteBuffer[] byteBuffers = byteBuf.nioBuffers();
                    while (written < length) {
                        written += fileChannel.write(byteBuffers);
                    }
                }
                fileChannel.force(false);
            } finally {
                fileChannel.close();
            }
        } finally {
            accessFile.close();
        }
        return written == length;
    }