nacos address中getCluster的原理和作用是什么
这篇文章主要介绍"nacos address中getCluster的原理和作用是什么"，在日常操作中，相信很多人在nacos address中getCluster的原理和作用是什么问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"nacos address中getCluster的原理和作用是什么"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
序
本文主要研究一下nacos address的getCluster
ServerListController
nacos-1.1.3/address/src/main/java/com/alibaba/nacos/address/controller/ServerListController.java
@RestControllerpublic class ServerListController { @Autowired private ServiceManager serviceManager; @Autowired private AddressServerGeneratorManager addressServerBuilderManager; /** * @param product will get Ip list of that products to be associated * @param cluster will get Ip list of that product cluster to be associated * @return */ @RequestMapping(value = "/{product}/{cluster}", method = RequestMethod.GET) public ResponseEntity getCluster(@PathVariable String product, @PathVariable String cluster) { String productName = addressServerBuilderManager.generateProductName(product); String serviceName = addressServerBuilderManager.generateNacosServiceName(productName); Service service = serviceManager.getService(Constants.DEFAULT_NAMESPACE_ID, serviceName); if (service == null) { return ResponseEntity.status(HttpStatus.NOT_FOUND).body("product=" + product + " not found."); } if (!service.getClusterMap().containsKey(cluster)) { return ResponseEntity.status(HttpStatus.NOT_FOUND).body("product=" + product + ",cluster=" + cluster + " not found."); } Cluster clusterObj = service.getClusterMap().get(cluster); return ResponseEntity.status(HttpStatus.OK).body(addressServerBuilderManager.generateResponseIps(clusterObj.allIPs(false))); }}getCluster方法首先通过addressServerBuilderManager.generateProductName(product)获取productName，通过addressServerBuilderManager.generateNacosServiceName(productName)获取serviceName
然后通过serviceManager.getService(Constants.DEFAULT_NAMESPACE_ID, serviceName)获取service，之后判断service.getClusterMap()是否包含cluster，不包含返回404
最后通过service.getClusterMap().get(cluster)获取cluster，然后通过addressServerBuilderManager.generateResponseIps(clusterObj.allIPs(false))返回结果
AddressServerGeneratorManager
nacos-1.1.3/address/src/main/java/com/alibaba/nacos/address/component/AddressServerGeneratorManager.java
@Componentpublic class AddressServerGeneratorManager { public String generateProductName(String name) { if (StringUtils.isBlank(name) || AddressServerConstants.DEFAULT_PRODUCT.equals(name)) { return AddressServerConstants.ALIWARE_NACOS_DEFAULT_PRODUCT_NAME; } return String.format(AddressServerConstants.ALIWARE_NACOS_PRODUCT_DOM_TEMPLATE, name); } public String generateNacosServiceName(String rawServiceName) { if (rawServiceName.indexOf(Constants.DEFAULT_GROUP) != -1) { return rawServiceName; } return Constants.DEFAULT_GROUP + AddressServerConstants.GROUP_SERVICE_NAME_SEP + rawServiceName; } public String generateResponseIps(List instanceList) { StringBuilder ips = new StringBuilder(); instanceList.forEach(instance -> { ips.append(instance.getIp() + ":" + instance.getPort()); ips.append("\n"); }); return ips.toString(); } //......} generateProductName方法对于name为空或者是nacos的，返回nacos.as.default，否则返回nacos.as.前缀加name；generateNacosServiceName会返回DEFAULT_GROUP@@加rawServiceName，默认rawServiceName是不包含DEFAULT_GROUP的；generateResponseIps方法将instanceList转为ip及port并用换行拼接的string
小结
getCluster方法首先通过addressServerBuilderManager.generateProductName(product)获取productName，通过addressServerBuilderManager.generateNacosServiceName(productName)获取serviceName
然后通过serviceManager.getService(Constants.DEFAULT_NAMESPACE_ID, serviceName)获取service，之后判断service.getClusterMap()是否包含cluster，不包含返回404
最后通过service.getClusterMap().get(cluster)获取cluster，然后通过addressServerBuilderManager.generateResponseIps(clusterObj.allIPs(false))返回结果
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