public static DivideUpstream buildDefaultDivideUpstream(final String host, final Integer port, final String namespaceId) {
        return DivideUpstream.builder().upstreamHost(LOCALHOST)
                .protocol("http://").upstreamUrl(buildUrl(host, port))
                .weight(50).warmup(Constants.WARMUP_TIME)
                .timestamp(System.currentTimeMillis())
                .status(Objects.nonNull(port) && StringUtils.isNotBlank(host))
                .namespaceId(namespaceId)
                .build();
    }
Build divide upstream divide upstream.

@param host the host
@param port the port
@param namespaceId the namespaceId
@return the divide upstream
shenyu-admin/src/main/java/org/apache/shenyu/admin/utils/CommonUpstreamUtils.java