聊聊nacos address的deleteCluster
阿新 • • 發佈:2019-12-31
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;
}
//......
}
複製程式碼
- deleteCluster接收product、cluster、ips引數;其中productName通過addressServerGeneratorManager.generateProductName(product)生成;clusterName通過addressServerManager.getDefaultClusterNameIfEmpty(cluster)生成
- 它首先通過serviceManager.getService獲取service,獲取不到則返回404;若ips為空,返回400;之後通過addressServerGeneratorManager.generateInstancesByIps(serviceName,ipArray)獲取instanceList
- 最後通過serviceManager.removeInstance(Constants.DEFAULT_NAMESPACE_ID,false,instanceList.toArray(new Instance[instanceList.size()]))移除instance;注意這裡的ephemeral引數為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,ephemeral,service,ips);
}
public void removeInstance(String namespaceId,Service service,Instance... ips) throws NacosException {
String key = KeyBuilder.buildInstanceListKey(namespaceId,ephemeral);
List<Instance> instanceList = substractIpAddresses(service,ips);
Instances instances = new Instances();
instances.setInstanceList(instanceList);
consistencyService.put(key,instances);
}
//......
}
複製程式碼
- getService方法直接從serviceMap中根據namespaceId獲取map,然後再根據serviceName獲取Service;removeInstance方法先獲取service,然後再移除指定的instance,最後更新到consistencyService
小結
- deleteCluster接收product、cluster、ips引數;其中productName通過addressServerGeneratorManager.generateProductName(product)生成;clusterName通過addressServerManager.getDefaultClusterNameIfEmpty(cluster)生成
- 它首先通過serviceManager.getService獲取service,獲取不到則返回404;若ips為空,返回400;之後通過addressServerGeneratorManager.generateInstancesByIps(serviceName,instanceList.toArray(new Instance[instanceList.size()]))移除instance;注意這裡的ephemeral引數為false