@Override
    public BizContext preHandleRequest(RemotingContext remotingCtx, T request) {
        return new DefaultBizContext(remotingCtx);
    }
Provide a default - {@link DefaultBizContext} implementation of {@link BizContext}.

@see com.alipay.remoting.rpc.protocol.UserProcessor#preHandleRequest(com.alipay.remoting.RemotingContext, java.lang.Object)
src/main/java/com/alipay/remoting/rpc/protocol/AbstractUserProcessor.java