@Test
    public void testInitOnce() {
        DomainRegistry domainRegistry = new DomainRegistry(new RegistryConfig());
        domainRegistry.init();
        ScheduledService origin = domainRegistry.scheduledExecutorService;
        domainRegistry.init();
        assertSame(origin, domainRegistry.scheduledExecutorService);
    }
@author <a href=mailto:orezsilence@163.com>zhangchengxi</a>
registry/registry-local/src/test/java/com/alipay/sofa/rpc/registry/local/DomainRegistryTest.java