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本篇内容主要讲解“nacos address中deleteCluster的原理及用法”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“nacos address中deleteCluster的原理及用法”吧!
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本文主要研究一下nacos address的deleteCluster
nacos-1.1.3/address/src/main/java/com/alibaba/nacos/address/controller/AddressServerClusterController.java
@RestController
@RequestMapping({AddressServerConstants.ADDRESS_SERVER_REQUEST_URL + "/nodes"})
public class AddressServerClusterController {
@Autowired
private ServiceManager serviceManager;
@Autowired
private AddressServerManager addressServerManager;
@Autowired
private AddressServerGeneratorManager addressServerGeneratorManager;
//......
@RequestMapping(value = "", method = RequestMethod.DELETE)
public ResponseEntity deleteCluster(@RequestParam(required = false) String product,
@RequestParam(required = false) String cluster,
@RequestParam String ips) {
//1. prepare the storage name for product and cluster
String productName = addressServerGeneratorManager.generateProductName(product);
String clusterName = addressServerManager.getDefaultClusterNameIfEmpty(cluster);
//2. prepare the response name for product and cluster to client
String rawProductName = addressServerManager.getRawProductName(product);
String rawClusterName = addressServerManager.getRawClusterName(cluster);
ResponseEntity responseEntity = ResponseEntity.status(HttpStatus.OK).body("product=" + rawProductName + ", cluster=" + rawClusterName + " delete success.");
try {
String serviceName = addressServerGeneratorManager.generateNacosServiceName(productName);
Service service = serviceManager.getService(Constants.DEFAULT_NAMESPACE_ID, serviceName);
if (service == null) {
responseEntity = ResponseEntity.status(HttpStatus.NOT_FOUND).body("product=" + rawProductName + " not found.");
} else {
if (StringUtils.isBlank(ips)) {
// delete all ips from the cluster
responseEntity = ResponseEntity.status(HttpStatus.BAD_REQUEST).body("ips must not be empty.");
} else {
// delete specified ip list
String[] ipArray = addressServerManager.splitIps(ips);
String checkResult = AddressServerParamCheckUtil.checkIps(ipArray);
if (AddressServerParamCheckUtil.CHECK_OK.equals(checkResult)) {
List instanceList = addressServerGeneratorManager.generateInstancesByIps(serviceName, rawProductName, clusterName, ipArray);
serviceManager.removeInstance(Constants.DEFAULT_NAMESPACE_ID, serviceName, false, instanceList.toArray(new Instance[instanceList.size()]));
} else {
responseEntity = ResponseEntity.status(HttpStatus.BAD_REQUEST).body(checkResult);
}
}
}
} catch (Exception e) {
responseEntity = ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(e.getCause());
}
return responseEntity;
}
//......
} deleteCluster接收product、cluster、ips参数；其中productName通过addressServerGeneratorManager.generateProductName(product)生成；clusterName通过addressServerManager.getDefaultClusterNameIfEmpty(cluster)生成
它首先通过serviceManager.getService获取service，获取不到则返回404；若ips为空，返回400；之后通过addressServerGeneratorManager.generateInstancesByIps(serviceName, rawProductName, clusterName, ipArray)获取instanceList
最后通过serviceManager.removeInstance(Constants.DEFAULT_NAMESPACE_ID, serviceName, false, instanceList.toArray(new Instance[instanceList.size()]))移除instance；注意这里的ephemeral参数为false
nacos-1.1.3/naming/src/main/java/com/alibaba/nacos/naming/core/ServiceManager.java
@Component
@DependsOn("nacosApplicationContext")
public class ServiceManager implements RecordListener {
/**
* Map>
*/
private Map> serviceMap = new ConcurrentHashMap<>();
private LinkedBlockingDeque toBeUpdatedServicesQueue = new LinkedBlockingDeque<>(1024 * 1024);
private Synchronizer synchronizer = new ServiceStatusSynchronizer();
private final Lock lock = new ReentrantLock();
@Resource(name = "consistencyDelegate")
private ConsistencyService consistencyService;
@Autowired
private SwitchDomain switchDomain;
@Autowired
private DistroMapper distroMapper;
@Autowired
private ServerListManager serverListManager;
@Autowired
private PushService pushService;
private final Object putServiceLock = new Object();
//......
public Service getService(String namespaceId, String serviceName) {
if (serviceMap.get(namespaceId) == null) {
return null;
}
return chooseServiceMap(namespaceId).get(serviceName);
}
public Map chooseServiceMap(String namespaceId) {
return serviceMap.get(namespaceId);
}
public void removeInstance(String namespaceId, String serviceName, boolean ephemeral, Instance... ips) throws NacosException {
Service service = getService(namespaceId, serviceName);
removeInstance(namespaceId, serviceName, ephemeral, service, ips);
}
public void removeInstance(String namespaceId, String serviceName, boolean ephemeral, Service service, Instance... ips) throws NacosException {
String key = KeyBuilder.buildInstanceListKey(namespaceId, serviceName, ephemeral);
List instanceList = substractIpAddresses(service, ephemeral, ips);
Instances instances = new Instances();
instances.setInstanceList(instanceList);
consistencyService.put(key, instances);
}
//......
} getService方法直接从serviceMap中根据namespaceId获取map，然后再根据serviceName获取Service；removeInstance方法先获取service，然后再移除指定的instance，最后更新到consistencyService
deleteCluster接收product、cluster、ips参数；其中productName通过addressServerGeneratorManager.generateProductName(product)生成；clusterName通过addressServerManager.getDefaultClusterNameIfEmpty(cluster)生成
它首先通过serviceManager.getService获取service，获取不到则返回404；若ips为空，返回400；之后通过addressServerGeneratorManager.generateInstancesByIps(serviceName, rawProductName, clusterName, ipArray)获取instanceList
最后通过serviceManager.removeInstance(Constants.DEFAULT_NAMESPACE_ID, serviceName, false, instanceList.toArray(new Instance[instanceList.size()]))移除instance；注意这里的ephemeral参数为false
到此，相信大家对“nacos address中deleteCluster的原理及用法”有了更深的了解，不妨来实际操作一番吧！这里是创新互联网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！