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.istio.model;
  
  import com.alibaba.nacos.api.naming.pojo.Instance;
  import com.alibaba.nacos.api.naming.pojo.ServiceInfo;
  import com.alibaba.nacos.naming.core.v2.pojo.Service;
  
  import java.util.ArrayList;
  import java.util.Date;
  import java.util.List;
  
  /**
   * @author special.fy
   */
  public class IstioService {
      
      private final String name;
      
      private final String groupName;
      
      private final String namespace;
      
      private final Long revision;
      
      private int port = 0;
      
      private String protocol;
      
      private final List<IstioEndpoint> hosts;
      
      private final Date createTimeStamp;
      
      public IstioService(Service service, ServiceInfo serviceInfo) {
          this.name = serviceInfo.getName();
          this.groupName = serviceInfo.getGroupName();
          this.namespace = service.getNamespace();
          this.revision = service.getRevision();
          // Record the create time of service to avoid trigger istio pull push.
          // See https://github.com/istio/istio/pull/30684
          createTimeStamp = new Date();
          
          this.hosts = sanitizeServiceInfo(serviceInfo);
      }
  
      public IstioService(Service service, ServiceInfo serviceInfo, IstioService old) {
          this.name = serviceInfo.getName();
          this.groupName = serviceInfo.getGroupName();
          this.namespace = service.getNamespace();
          this.revision = service.getRevision();
          // set the create time of service as old time to avoid trigger istio pull push.
          // See https://github.com/istio/istio/pull/30684
          createTimeStamp = old.getCreateTimeStamp();
          
          this.hosts = sanitizeServiceInfo(serviceInfo);
      }
  
      private List<IstioEndpoint> sanitizeServiceInfo(ServiceInfo serviceInfo) {
          List<IstioEndpoint> hosts = new ArrayList<>();
  
          for (Instance instance : serviceInfo.getHosts()) {
              if (instance.isHealthy() && instance.isEnabled()) {
                  IstioEndpoint istioEndpoint = new IstioEndpoint(instance);
                  if (port == 0) {
                      port = istioEndpoint.getPort();
                      protocol = istioEndpoint.getProtocol();
                  }
                  hosts.add(istioEndpoint);
              }
          }
  
          // Panic mode, all instances are invalid, to push all instances to istio.
          if (hosts.isEmpty()) {
              for (Instance instance : serviceInfo.getHosts()) {
                  IstioEndpoint istioEndpoint = new IstioEndpoint(instance);
                  hosts.add(istioEndpoint);
              }
          }
  
          return hosts;
      }
      
      public String getNamespace() {
          return namespace;
      }
  
      public Long getRevision() {
          return revision;
      }
      
      public int getPort() {
          return port;
      }
      
      public String getProtocol() {
          return protocol;
      }
      
      public List<IstioEndpoint> getHosts() {
          return hosts;
      }
  
      public Date getCreateTimeStamp() {
          return createTimeStamp;
      }
  }