content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.alibaba.nacos.test.naming;
  
  import com.alibaba.nacos.Nacos;
  import com.alibaba.nacos.api.naming.NamingFactory;
  import com.alibaba.nacos.api.naming.NamingService;
  import com.alibaba.nacos.api.naming.listener.Event;
  import com.alibaba.nacos.api.naming.listener.EventListener;
  import com.alibaba.nacos.api.naming.listener.NamingEvent;
  import com.alibaba.nacos.api.naming.pojo.Instance;
  import com.alibaba.nacos.api.naming.selector.NamingSelector;
  import com.alibaba.nacos.client.naming.selector.DefaultNamingSelector;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.boot.test.web.server.LocalServerPort;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  
  import static com.alibaba.nacos.test.naming.NamingBase.TEST_PORT;
  import static com.alibaba.nacos.test.naming.NamingBase.randomDomainName;
  import static com.alibaba.nacos.test.naming.NamingBase.verifyInstanceList;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.fail;
  
  /**
   * Created by wangtong.wt on 2018/6/20.
   *
   * @author wangtong.wt
   * @date 2018/6/20
   */
  @SpringBootTest(classes = Nacos.class, properties = {
          "server.servlet.context-path=/nacos"}, webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
  class UnsubscribeNamingITCase {
      
      private NamingService naming;
      
      @LocalServerPort
      private int port;
      
      private volatile List<Instance> instances = Collections.emptyList();
      
      @BeforeEach
      void init() throws Exception {
          instances = Collections.emptyList();
          if (naming == null) {
              //TimeUnit.SECONDS.sleep(10);
              naming = NamingFactory.createNamingService("127.0.0.1" + ":" + port);
          }
      }
      
      /**
       * 取消订阅，添加IP，不会收到通知
       *
       * @throws Exception
       */
      @Test
      void unsubscribe() throws Exception {
          String serviceName = randomDomainName();
          
          EventListener listener = new EventListener() {
              @Override
              public void onEvent(Event event) {
                  System.out.println(((NamingEvent) event).getServiceName());
                  System.out.println(((NamingEvent) event).getInstances());
                  instances = ((NamingEvent) event).getInstances();
              }
          };
          
          naming.subscribe(serviceName, listener);
          
          naming.registerInstance(serviceName, "127.0.0.1", TEST_PORT, "c1");
          
          while (instances.isEmpty()) {
              Thread.sleep(1000L);
          }
          
          assertTrue(verifyInstanceList(instances, naming.getAllInstances(serviceName)));
          
          naming.unsubscribe(serviceName, listener);
          
          instances = Collections.emptyList();
          naming.registerInstance(serviceName, "127.0.0.2", TEST_PORT, "c1");
          
          int i = 0;
          while (instances.isEmpty()) {
              Thread.sleep(1000L);
              if (i++ > 10) {
                  return;
              }
          }
          
          fail();
      }
      
      /**
       * 取消订阅，在指定cluster添加IP，不会收到通知
       *
       * @throws Exception
       */
      @Test
      void unsubscribeCluster() throws Exception {
          String serviceName = randomDomainName();
          
          EventListener listener = new EventListener() {
              @Override
              public void onEvent(Event event) {
                  System.out.println(((NamingEvent) event).getServiceName());
                  System.out.println(((NamingEvent) event).getInstances());
                  instances = ((NamingEvent) event).getInstances();
              }
          };
          
          naming.subscribe(serviceName, Arrays.asList("c1"), listener);
          
          naming.registerInstance(serviceName, "127.0.0.1", TEST_PORT, "c1");
          
          while (instances.isEmpty()) {
              Thread.sleep(1000L);
          }
          
          assertTrue(verifyInstanceList(instances, naming.getAllInstances(serviceName)));
          
          naming.unsubscribe(serviceName, Arrays.asList("c1"), listener);
          
          instances = Collections.emptyList();
          naming.registerInstance(serviceName, "127.0.0.2", TEST_PORT, "c1");
          
          int i = 0;
          while (instances.isEmpty()) {
              Thread.sleep(1000L);
              if (i++ > 10) {
                  return;
              }
          }
          
          fail();
      }
      
      /**
       * 取消订阅，添加选择器范围 IP，不会收到通知
       *
       * @throws Exception
       */
      @Test
      void unsubscribeSelector() throws Exception {
          String serviceName = randomDomainName();
          
          EventListener listener = new EventListener() {
              @Override
              public void onEvent(Event event) {
                  System.out.println(((NamingEvent) event).getServiceName());
                  System.out.println(((NamingEvent) event).getInstances());
                  instances = ((NamingEvent) event).getInstances();
              }
          };
          
          NamingSelector selector = new DefaultNamingSelector(instance -> instance.getIp().startsWith("127.0.0"));
          
          naming.subscribe(serviceName, selector, listener);
          
          naming.registerInstance(serviceName, "127.0.0.1", TEST_PORT);
          
          while (instances.isEmpty()) {
              Thread.sleep(1000L);
          }
          
          assertTrue(verifyInstanceList(instances, naming.getAllInstances(serviceName)));
          
          naming.unsubscribe(serviceName, selector, listener);
          
          instances = Collections.emptyList();
          naming.registerInstance(serviceName, "127.0.0.2", TEST_PORT);
          
          int i = 0;
          while (instances.isEmpty()) {
              Thread.sleep(1000L);
              if (i++ > 10) {
                  return;
              }
          }
          
          fail();
      }
      
  }
  