添加配置分析

1.添加配置项

2.对应了ItemController

@PreAuthorize(value = "@permissionValidator.hasModifyNamespacePermission(#appId, #namespaceName, #env)")
  @PostMapping("/apps/{appId}/envs/{env}/clusters/{clusterName}/namespaces/{namespaceName}/item")
  public ItemDTO createItem(@PathVariable String appId, @PathVariable String env,
                            @PathVariable String clusterName, @PathVariable String namespaceName,
                            @RequestBody ItemDTO item) {
    checkModel(isValidItem(item)); // 判断参数是否合法

    //protect
    item.setLineNum(0);
    item.setId(0);
    String userId = userInfoHolder.getUser().getUserId();
    item.setDataChangeCreatedBy(userId);
    item.setDataChangeLastModifiedBy(userId);
    item.setDataChangeCreatedTime(null);
    item.setDataChangeLastModifiedTime(null);
    // 生成item对象
    // 调用configService去创建item
    return configService.createItem(appId, Env.valueOf(env), clusterName, namespaceName, item);
  }

3.createItem

public ItemDTO createItem(String appId, Env env, String clusterName, String namespaceName, ItemDTO item) {
        NamespaceDTO namespace = namespaceAPI.loadNamespace(appId, env, clusterName, namespaceName);
        if (namespace == null) {
            throw new BadRequestException(
                    "namespace:" + namespaceName + " not exist in env:" + env + ", cluster:" + clusterName);
        }
        item.setNamespaceId(namespace.getId());
        // 核心是itemApi
        ItemDTO itemDTO = itemAPI.createItem(appId, env, clusterName, namespaceName, item);
        Tracer.logEvent(TracerEventType.MODIFY_NAMESPACE, String.format("%s+%s+%s+%s", appId, env, clusterName, namespaceName));
        return itemDTO;
    }

4.itemApi去创建item

AdminServiceAPI

public ItemDTO createItem(String appId, Env env, String clusterName, String namespace, ItemDTO item) {
      return restTemplate.post(env, "apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/items",
          item, ItemDTO.class, appId, clusterName, namespace);// 发现是post了一个请求给AdminService,到指定url,然后那边去继续创建item的逻辑
    }

5.AdminService接受到请求,去执行createItem逻辑

@PreAcquireNamespaceLock
    @PostMapping("/apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/items")
    public ItemDTO create(@PathVariable("appId") String appId,
                          @PathVariable("clusterName") String clusterName,
                          @PathVariable("namespaceName") String namespaceName, @RequestBody ItemDTO dto) {
        Item entity = BeanUtils.transform(Item.class, dto);

        ConfigChangeContentBuilder builder = new ConfigChangeContentBuilder();
        Item managedEntity = itemService.findOne(appId, clusterName, namespaceName, entity.getKey());
        if (managedEntity != null) {
            throw new BadRequestException("item already exists");
        } else {
            entity = itemService.save(entity);
            builder.createItem(entity);
        }
        dto = BeanUtils.transform(ItemDTO.class, entity);

        Commit commit = new Commit();
        commit.setAppId(appId);
        commit.setClusterName(clusterName);
        commit.setNamespaceName(namespaceName);
        commit.setChangeSets(builder.build());
        commit.setDataChangeCreatedBy(dto.getDataChangeLastModifiedBy());
        commit.setDataChangeLastModifiedBy(dto.getDataChangeLastModifiedBy());
        commitService.save(commit);

        return dto;
    }

6.可以发现adminService是将配置项item序列化为json落到config配置库的Commit表里

MariaDB [ApolloPortalDB]> use ApolloConfigTestDb
ERROR 1049 (42000): Unknown database 'ApolloConfigTestDb'
MariaDB [ApolloPortalDB]> use ApolloConfigTestDB
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
MariaDB [ApolloConfigTestDB]> show tables;
+------------------------------+
| Tables_in_ApolloConfigTestDB |
+------------------------------+
| App                          |
| AppNamespace                 |
| Audit                        |
| Cluster                      |
| Commit                       |
| GrayReleaseRule              |
| Instance                     |
| InstanceConfig               |
| Item                         |
| Namespace                    |
| NamespaceLock                |
| Release                      |
| ReleaseHistory               |
| ReleaseMessage               |
| ServerConfig                 |
+------------------------------+
15 rows in set (0.000 sec)

MariaDB [ApolloConfigTestDB]> select * from Commit;
+----+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+---------------------+-------------+---------------+---------+-----------+----------------------+------------------------+---------------------------+---------------------+
| Id | ChangeSets                                                                                                                                                                                                                                                                                                                                                  | AppId               | ClusterName | NamespaceName | Comment | IsDeleted | DataChange_CreatedBy | DataChange_CreatedTime | DataChange_LastModifiedBy | DataChange_LastTime |
+----+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+---------------------+-------------+---------------+---------+-----------+----------------------+------------------------+---------------------------+---------------------+
|  1 | {"createItems":[{"namespaceId":4,"key":"dubbo.registry","value":"zk://zk1.od.com","comment":"zk://zk1.od.com","lineNum":1,"id":1,"isDeleted":false,"dataChangeCreatedBy":"apollo","dataChangeCreatedTime":"2022-04-14 19:26:41","dataChangeLastModifiedBy":"apollo","dataChangeLastModifiedTime":"2022-04-14 19:26:41"}],"updateItems":[],"deleteItems":[]} | dubbo-demo-service2 | default     | application   | NULL    |           | apollo               | 2022-04-14 19:26:41    | apollo                    | 2022-04-14 19:26:41 |
+----+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+---------------------+-------------+---------------+---------+-----------+----------------------+------------------------+---------------------------+---------------------+
1 row in set (0.001 sec)