BinaryMemcacheObjectAggregator Class — netty Architecture

Source Code

codec-memcache/src/main/java/io/netty/handler/codec/memcache/binary/BinaryMemcacheObjectAggregator.java lines 33–96

@UnstableApi
public class BinaryMemcacheObjectAggregator extends AbstractMemcacheObjectAggregator<BinaryMemcacheMessage> {

    public BinaryMemcacheObjectAggregator(int maxContentLength) {
        super(maxContentLength);
    }

    @Override
    protected boolean isStartMessage(MemcacheObject msg) throws Exception {
        return msg instanceof BinaryMemcacheMessage;
    }

    @Override
    protected FullMemcacheMessage beginAggregation(BinaryMemcacheMessage start, ByteBuf content) throws Exception {
        if (start instanceof BinaryMemcacheRequest) {
            return toFullRequest((BinaryMemcacheRequest) start, content);
        }

        if (start instanceof BinaryMemcacheResponse) {
            return toFullResponse((BinaryMemcacheResponse) start, content);
        }

        // Should not reach here.
        throw new Error("Unexpected memcache message type: " + className(start));
    }

    private static FullBinaryMemcacheRequest toFullRequest(BinaryMemcacheRequest request, ByteBuf content) {
        ByteBuf key = request.key() == null ? null : request.key().retain();
        ByteBuf extras = request.extras() == null ? null : request.extras().retain();
        DefaultFullBinaryMemcacheRequest fullRequest =
                new DefaultFullBinaryMemcacheRequest(key, extras, content);

        fullRequest.setMagic(request.magic());
        fullRequest.setOpcode(request.opcode());
        fullRequest.setKeyLength(request.keyLength());
        fullRequest.setExtrasLength(request.extrasLength());
        fullRequest.setDataType(request.dataType());
        fullRequest.setTotalBodyLength(request.totalBodyLength());
        fullRequest.setOpaque(request.opaque());
        fullRequest.setCas(request.cas());
        fullRequest.setReserved(request.reserved());

        return fullRequest;
    }

    private static FullBinaryMemcacheResponse toFullResponse(BinaryMemcacheResponse response, ByteBuf content) {
        ByteBuf key = response.key() == null ? null : response.key().retain();
        ByteBuf extras = response.extras() == null ? null : response.extras().retain();
        DefaultFullBinaryMemcacheResponse fullResponse =
                new DefaultFullBinaryMemcacheResponse(key, extras, content);

        fullResponse.setMagic(response.magic());
        fullResponse.setOpcode(response.opcode());
        fullResponse.setKeyLength(response.keyLength());
        fullResponse.setExtrasLength(response.extrasLength());
        fullResponse.setDataType(response.dataType());
        fullResponse.setTotalBodyLength(response.totalBodyLength());
        fullResponse.setOpaque(response.opaque());
        fullResponse.setCas(response.cas());
        fullResponse.setStatus(response.status());

        return fullResponse;
    }
}