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.core.cluster;
  
  import com.alibaba.nacos.common.notify.Event;
  import com.alibaba.nacos.common.notify.NotifyCenter;
  import com.alibaba.nacos.common.notify.listener.Subscriber;
  import com.alibaba.nacos.core.cluster.Member;
  import com.alibaba.nacos.core.cluster.MemberUtil;
  import com.alibaba.nacos.core.cluster.MembersChangeEvent;
  import com.alibaba.nacos.api.common.NodeState;
  import com.alibaba.nacos.core.cluster.ServerMemberManager;
  import com.alibaba.nacos.sys.env.Constants;
  import com.alibaba.nacos.sys.env.EnvUtil;
  import org.junit.jupiter.api.AfterAll;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeAll;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.MethodOrderer.MethodName;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.TestMethodOrder;
  import org.springframework.core.env.StandardEnvironment;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.AtomicInteger;
  import java.util.concurrent.atomic.AtomicReference;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  /**
   * Cluster node manages unit tests.
   *
   * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
   */
  // todo fix
  @SuppressWarnings("checkstyle:AbbreviationAsWordInName")
  @TestMethodOrder(MethodName.class)
  class ServerMemberManagerCoreITCase {
      
      private ServerMemberManager memberManager;
      
      @BeforeAll
      static void initClass() throws Exception {
          System.setProperty(Constants.NACOS_SERVER_IP, "127.0.0.1");
          System.setProperty("server.port", "8847");
          EnvUtil.setIsStandalone(true);
          EnvUtil.setEnvironment(new StandardEnvironment());
      }
      
      @AfterAll
      static void destroyClass() {
          System.clearProperty(Constants.NACOS_SERVER_IP);
          System.clearProperty("server.port");
      }
      
      @BeforeEach
      void before() throws Exception {
          memberManager = new ServerMemberManager();
      }
      
      @AfterEach
      void after() throws Exception {
          memberManager.shutdown();
      }
      
      @Test
      void testKisFirst() {
          String firstIp = "127.0.0.1:8847";
          String secondIp = "127.0.0.1:8848";
          String thirdIp = "127.0.0.1:8849";
          
          Map<String, Member> map = new HashMap<>(4);
          map.put(firstIp, Member.builder().ip("127.0.0.1").port(8847).state(NodeState.UP).build());
          map.put(secondIp, Member.builder().ip("127.0.0.1").port(8848).state(NodeState.UP).build());
          map.put(thirdIp, Member.builder().ip("127.0.0.1").port(8849).state(NodeState.UP).build());
          
          List<Member> members = new ArrayList<Member>(map.values());
          Collections.sort(members);
          List<String> ss = MemberUtil.simpleMembers(members);
          
          assertEquals(ss.get(0), members.get(0).getAddress());
      }
      
      @Test
      void testMemberChange() throws Exception {
          
          AtomicInteger integer = new AtomicInteger(0);
          CountDownLatch latch = new CountDownLatch(1);
          
          NotifyCenter.registerSubscriber(new Subscriber<MembersChangeEvent>() {
              @Override
              public void onEvent(MembersChangeEvent event) {
                  integer.incrementAndGet();
                  latch.countDown();
              }
              
              @Override
              public Class<? extends Event> subscribeType() {
                  return MembersChangeEvent.class;
              }
          });
          Collection<Member> members = memberManager.allMembers();
          
          System.out.println(members);
          
          memberManager.memberJoin(members);
          
          members.add(Member.builder().ip("115.159.3.213").port(8848).build());
          
          boolean changed = memberManager.memberJoin(members);
          assertTrue(changed);
          
          latch.await(10_000L, TimeUnit.MILLISECONDS);
          
          assertEquals(1, integer.get());
      }
      
      @Test
      void testMemberHealthCheck() throws Exception {
          AtomicReference<Collection<Member>> healthMembers = new AtomicReference<>();
          CountDownLatch first = new CountDownLatch(1);
          CountDownLatch second = new CountDownLatch(1);
          NotifyCenter.registerSubscriber(new Subscriber<MembersChangeEvent>() {
              @Override
              public void onEvent(MembersChangeEvent event) {
                  System.out.println(event);
                  healthMembers.set(MemberUtil.selectTargetMembers(event.getMembers(),
                          member -> !NodeState.DOWN.equals(member.getState())));
                  if (first.getCount() == 1) {
                      first.countDown();
                      return;
                  }
                  if (second.getCount() == 1) {
                      second.countDown();
                  }
              }
              
              @Override
              public Class<? extends Event> subscribeType() {
                  return MembersChangeEvent.class;
              }
          });
          
          String firstIp = "127.0.0.1:8847";
          String secondIp = "127.0.0.1:8848";
          String thirdIp = "127.0.0.1:8849";
          
          Map<String, Member> map = new HashMap<>(4);
          map.put(firstIp, Member.builder().ip("127.0.0.1").port(8847).state(NodeState.UP).build());
          map.put(secondIp, Member.builder().ip("127.0.0.1").port(8848).state(NodeState.UP).build());
          map.put(thirdIp, Member.builder().ip("127.0.0.1").port(8849).state(NodeState.UP).build());
          
          Set<Member> firstMemberList = new HashSet<>(map.values());
          
          memberManager.memberJoin(map.values());
          
          first.await(); //fix blocking
          Set<Member> copy = new HashSet<>(firstMemberList);
          copy.removeAll(healthMembers.get());
          assertEquals(2, copy.size());
          
          Member member = map.get(firstIp);
          member.setState(NodeState.DOWN);
          assertTrue(memberManager.update(member));
          
          second.await(); //fix blocking
          copy = new HashSet<>(firstMemberList);
          copy.removeAll(healthMembers.get());
          assertEquals(3, copy.size());
          assertTrue(copy.contains(map.get(firstIp)));
      }
      
  }
  