聊聊nacos address的deleteCluster
- 2019 年 10 月 28 日
- 笔记
序
本文主要研究一下nacos address的deleteCluster
AddressServerClusterController
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<Instance> 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
ServiceManager
nacos-1.1.3/naming/src/main/java/com/alibaba/nacos/naming/core/ServiceManager.java
@Component @DependsOn("nacosApplicationContext") public class ServiceManager implements RecordListener<Service> { /** * Map<namespace, Map<group::serviceName, Service>> */ private Map<String, Map<String, Service>> serviceMap = new ConcurrentHashMap<>(); private LinkedBlockingDeque<ServiceKey> 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<String, Service> 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<Instance> 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
小结
- 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
doc
- AddressServerClusterController
