public synchronized void refreshConsumer()

in dubbo-admin-server/src/main/java/org/apache/dubbo/admin/service/impl/InstanceRegistryCache.java [81:121]
31 lines of code
6 McCabe index (conditional complexity)

    public synchronized void refreshConsumer(boolean refreshAll) {
        if (startRefresh.compareAndSet(false, true)) {
            ScheduledExecutorService executorService = new ScheduledThreadPoolExecutor(1, new NamedThreadFactory("Consumer-Refresh"));
            executorService.scheduleAtFixedRate(() -> refreshConsumer(true), 60, 60, TimeUnit.MINUTES);
        }

        Map<String, Map<String, List<URL>>> origin;

        if (refreshAll) {
            origin = new ConcurrentHashMap<>();
        } else {
            origin = subscribedCache;
        }

        Map<String, List<InstanceAddressURL>> providers = get(Constants.PROVIDERS_CATEGORY).values().stream()
                .flatMap((e) -> e.values().stream())
                .flatMap(Collection::stream)
                .collect(Collectors.groupingBy(InstanceAddressURL::getAddress));

        // remove cached
        origin.keySet().forEach(providers::remove);

        for (List<InstanceAddressURL> instanceAddressURLs : providers.values()) {
            ServiceInstance instance = instanceAddressURLs.get(0).getInstance();
            String metadataType = ServiceInstanceMetadataUtils.getMetadataStorageType(instance);

            if (!REMOTE_METADATA_STORAGE_TYPE.equals(metadataType)) {
                MetadataService metadataService = MetadataUtils.referProxy(instance).getProxy();
                try {
                    Set<String> subscribedURLs = metadataService.getSubscribedURLs();

                    Map<String, List<URL>> subscribed = subscribedURLs.stream().map(URL::valueOf).collect(Collectors.groupingBy(URL::getServiceKey));
                    origin.put(instanceAddressURLs.get(0).getAddress(), subscribed);
                } catch (Throwable ignored) {

                }
                ((Destroyable) metadataService).$destroy();
            }
            
        }
    }