@Override
            public void updateAllProviders(List<ProviderGroup> providerGroups) {
                ps.set(0);
                for (ProviderGroup providerGroup : providerGroups) {
                    ps.addAndGet(providerGroup.size());
                }
            }
Created by zhanggeng on 2017/7/15.

@author <a href="mailto:zhanggeng.zg@antfin.com">zhanggeng</a>
registry/registry-sofa/src/test/java/com/alipay/sofa/rpc/registry/sofa/SofaRegistrySubscribeCallbackTest.java