
# 查询中心网络策略变化集 - ListCentralNetworkPolicyChangeSet
#### 功能介绍
查询与当前应用中心网络策略的变化集。
#### 调试
您可以在[API Explorer](https://console.huaweicloud.com/apiexplorer/#/openapi/CC/doc?api=ListCentralNetworkPolicyChangeSet&version=v3)中调试该接口，支持自动认证鉴权。API Explorer可以自动生成SDK代码示例，并提供SDK代码示例调试功能。
#### 授权信息
账号具备所有API的调用权限，如果使用账号下的IAM用户调用当前API，该IAM用户需具备调用API所需的权限。
- 如果使用角色与策略授权，具体权限要求请参见[权限和授权项](https://support.huaweicloud.com/api-cc/cc_02_0002.html)。
- 如果使用身份策略授权，需具备如下身份策略权限。
  
  | 授权项                             | 访问级别 | 资源类型（\*为必须）       | 条件键 | 别名 | 依赖的授权项 |
  |:---|:---|:---|:---|:---|:---|
  | cc:centralNetwork:listChangeSet | List | centralNetwork \* | -   | -  | -      |
     
  
 
#### URI
GET /v3/{domain_id}/gcn/central-network/{central_network_id}/policies/{policy_id}/change-set
表1路径参数 
| 参数                 | 是否必选 | 参数类型   | 描述                            |
|:---|:---|:---|:---|
| domain_id          | 是    | String | 用户的账号ID，即租户ID，用于标识资源所属的华为云账号。 |
| policy_id          | 是    | String | 网络策略ID。                       |
| central_network_id | 是    | String | 中心网络的ID。                      |
   
表2Query参数 
| 参数                    | 是否必选 | 参数类型             | 描述            |
|:---|:---|:---|:---|
| enterprise_project_id | 否    | Array of strings | 根据企业项目ID过滤列表。 |
   
#### 请求参数
表3请求Header参数 
| 参数           | 是否必选 | 参数类型   | 描述                            |
|:---|:---|:---|:---|
| X-Auth-Token | 否    | String | 用户Token，即用户的认证令牌，用于验证用户身份和权限。 |
   
#### 响应参数
**状态码：200**
表4响应Body参数 
| 参数                                | 参数类型                                                                                                                     | 描述        |
|:---|:---|:---|
| request_id                        | String                                                                                                                   | 请求ID。     |
| page_info                         | [PageInfo] object                                                 | 分页查询页的信息。 |
| central_network_policy_change_set | Array of [CentralNetworkElementChange] objects | 网络策略变化列表。 |
   
 表5PageInfo 
| 参数              | 参数类型    | 描述         |
|:---|:---|:---|
| next_marker     | String  | 向后分页标识符。   |
| previous_marker | String  | 向前分页标识符。   |
| current_count   | Integer | 当前列表中资源数量。 |
   
 表6CentralNetworkElementChange 
| 参数           | 参数类型   | 描述                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|:---|:---|:---|
| operation_id | String | 操作，有效值： - CreateCentralNetworkPlane: 新增中心网络平面   - DeleteCentralNetworkPlane: 移除中心网络平面   - UpdateCentralNetworkPlane: 更新中心网络平面   - CreateCentralNetworkErInstance: 新增中心网络ER实例   - DeleteCentralNetworkErInstance: 移除中心网络ER实例   - CreateCentralNetworkErConnection: 新增中心网络ER连接   - DeleteCentralNetworkErConnection: 移除中心网络ER连接   - CreateCentralNetworkErTable: 新增中心网络ER路由表   - DeleteCentralNetworkErTable: 移除中心网络ER路由表   - SwitchCentralNetworkErTable: 切换中心网络ER路由表    |
   
#### 请求示例
查询中心网络策略变化集
```
GET /v3/{domain_id}/gcn/central-network/{central_network_id}/policies/{policy_id}/change-set
```
#### 响应示例
**状态码：200**
查询与当前应用中心网络策略的变化集成功。
```
{
  "request_id" : "a334adc3e2cba87855de6f3ab58b9db5",
  "page_info" : {
    "current_count" : 8
  },
  "central_network_policy_change_set" : [ {
    "operation_id" : "UpdateCentralNetworkPlane",
    "original_central_network_plane" : {
      "name" : "default-plane",
      "is_default" : true,
      "associate_er_tables" : [ {
        "project_id" : "2b20c49c4c6d4eefb7b7c7c7c7c7c7c7",
        "region_id" : "region-abc",
        "enterprise_router_id" : "395b0884-aab4-4bf0-8cb8-7f2da26708dd",
        "enterprise_router_table_id" : "cc542128-5c2d-402a-8960-53bb2ed9484e"
      } ]
    },
    "newest_central_network_plane" : {
      "name" : "default-plane",
      "is_default" : true,
      "associate_er_tables" : [ {
        "project_id" : "2b20c49c4c6d4eefb7b7c7c7c7c7c7c7",
        "region_id" : "region-abc",
        "enterprise_router_id" : "c73b26b7-33f0-438d-b440-8e87dfe6fef9",
        "enterprise_router_table_id" : "c0d51f20-0313-40f7-a74e-9dccb5da21c0"
      } ]
    }
  }, {
    "operation_id" : "CreateCentralNetworkErInstance",
    "create_central_network_er_instance" : {
      "enterprise_router_id" : "c73b26b7-33f0-438d-b440-8e87dfe6fef9",
      "project_id" : "2b20c49c4c6d4eefb7b7c7c7c7c7c7c7",
      "region_id" : "region-abc"
    }
  }, {
    "operation_id" : "DeleteCentralNetworkErInstance",
    "delete_central_network_er_instance" : {
      "enterprise_router_id" : "395b0884-aab4-4bf0-8cb8-7f2da26708dd",
      "project_id" : "2b20c49c4c6d4eefb7b7c7c7c7c7c7c7",
      "region_id" : "region-abc"
    }
  }, {
    "operation_id" : "CreateCentralNetworkErConnection",
    "central_network_plane_name" : "default-plane",
    "index" : 0,
    "create_central_network_er_connection" : [ {
      "project_id" : "2b20c49c4c6d4eefb7b7c7c7c7c7c7c7",
      "region_id" : "region-abc-1",
      "enterprise_router_id" : "c9c9c756-6984-4866-bab7-5b55c81594bd",
      "enterprise_router_table_id" : "58613052-f9d4-4fa4-a3f0-6d6873190826"
    }, {
      "project_id" : "8d01a037388442f6a2e435f4f30860a3",
      "region_id" : "region-abc-2",
      "enterprise_router_id" : "58fad9c1-b4bd-4622-84e4-a0fcb2423601",
      "enterprise_router_table_id" : "a5347056-e29f-4192-9256-e151c61f854c"
    } ]
  }, {
    "operation_id" : "DeleteCentralNetworkErConnection",
    "central_network_plane_name" : "default-plane",
    "index" : 1,
    "delete_central_network_er_connection" : [ {
      "project_id" : "2b20c49c4c6d4eefb7b7c7c7c7c7c7c7",
      "region_id" : "region-abc-1",
      "enterprise_router_id" : "c9c9c756-6984-4866-bab7-5b55c81594bd",
      "enterprise_router_table_id" : "58613052-f9d4-4fa4-a3f0-6d6873190826"
    }, {
      "project_id" : "8d01a037388442f6a2e435f4f30860a3",
      "region_id" : "region-abc-2",
      "enterprise_router_id" : "58fad9c1-b4bd-4622-84e4-a0fcb2423601",
      "enterprise_router_table_id" : "a5347056-e29f-4192-9256-e151c61f854c"
    } ]
  }, {
    "operation_id" : "CreateCentralNetworkErTable",
    "central_network_plane_name" : "default-plane",
    "create_central_network_er_table" : {
      "project_id" : "2b20c49c4c6d4eefb7b7c7c7c7c7c7c7",
      "region_id" : "region-abc",
      "enterprise_router_id" : "c73b26b7-33f0-438d-b440-8e87dfe6fef9",
      "enterprise_router_table_id" : "c0d51f20-0313-40f7-a74e-9dccb5da21c0"
    }
  }, {
    "operation_id" : "DeleteCentralNetworkErTable",
    "central_network_plane_name" : "default-plane",
    "delete_central_network_er_table" : {
      "project_id" : "2b20c49c4c6d4eefb7b7c7c7c7c7c7c7",
      "region_id" : "region-abc",
      "enterprise_router_id" : "395b0884-aab4-4bf0-8cb8-7f2da26708dd",
      "enterprise_router_table_id" : "cc542128-5c2d-402a-8960-53bb2ed9484e"
    }
  }, {
    "operation_id" : "SwitchCentralNetworkErTable",
    "central_network_plane_name" : "default-plane",
    "switch_central_network_er_table" : {
      "project_id" : "2b20c49c4c6d4eefb7b7c7c7c7c7c7c7",
      "region_id" : "region-abc",
      "enterprise_router_id" : "5cc75ed0-bd6c-3af4-663b-caba3315bb08",
      "original_enterprise_router_table_id" : "b705f49e-df88-eaf3-3aeb-95d534138156",
      "new_enterprise_router_table_id" : "b705f49e-df88-eaf3-3aeb-95d534138158"
    }
  } ]
}
```
#### SDK代码示例
SDK代码示例如下。
- [Java]
  ```
  package com.huaweicloud.sdk.test;
  import com.huaweicloud.sdk.core.auth.ICredential;
  import com.huaweicloud.sdk.core.auth.GlobalCredentials;
  import com.huaweicloud.sdk.core.exception.ConnectionException;
  import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
  import com.huaweicloud.sdk.core.exception.ServiceResponseException;
  import com.huaweicloud.sdk.cc.v3.region.CcRegion;
  import com.huaweicloud.sdk.cc.v3.*;
  import com.huaweicloud.sdk.cc.v3.model.*;
  public class ListCentralNetworkPolicyChangeSetSolution {
      public static void main(String[] args) {
          // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
          // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
          String ak = System.getenv("CLOUD_SDK_AK");
          String sk = System.getenv("CLOUD_SDK_SK");
          ICredential auth = new GlobalCredentials()
                  .withAk(ak)
                  .withSk(sk);
          CcClient client = CcClient.newBuilder()
                  .withCredential(auth)
                  .withRegion(CcRegion.valueOf("<YOUR REGION>"))
                  .build();
          ListCentralNetworkPolicyChangeSetRequest request = new ListCentralNetworkPolicyChangeSetRequest();
          request.withPolicyId("{policy_id}");
          request.withCentralNetworkId("{central_network_id}");
          try {
              ListCentralNetworkPolicyChangeSetResponse response = client.listCentralNetworkPolicyChangeSet(request);
              System.out.println(response.toString());
          } catch (ConnectionException e) {
              e.printStackTrace();
          } catch (RequestTimeoutException e) {
              e.printStackTrace();
          } catch (ServiceResponseException e) {
              e.printStackTrace();
              System.out.println(e.getHttpStatusCode());
              System.out.println(e.getRequestId());
              System.out.println(e.getErrorCode());
              System.out.println(e.getErrorMsg());
          }
      }
  }
  ```
- [Python]
  ```
  # coding: utf-8
  import os
  from huaweicloudsdkcore.auth.credentials import GlobalCredentials
  from huaweicloudsdkcc.v3.region.cc_region import CcRegion
  from huaweicloudsdkcore.exceptions import exceptions
  from huaweicloudsdkcc.v3 import *
  if __name__ == "__main__":
      # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
      # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
      ak = os.environ["CLOUD_SDK_AK"]
      sk = os.environ["CLOUD_SDK_SK"]
      credentials = GlobalCredentials(ak, sk)
      client = CcClient.new_builder() \
          .with_credentials(credentials) \
          .with_region(CcRegion.value_of("<YOUR REGION>")) \
          .build()
      try:
          request = ListCentralNetworkPolicyChangeSetRequest()
          request.policy_id = "{policy_id}"
          request.central_network_id = "{central_network_id}"
          response = client.list_central_network_policy_change_set(request)
          print(response)
      except exceptions.ClientRequestException as e:
          print(e.status_code)
          print(e.request_id)
          print(e.error_code)
          print(e.error_msg)
  ```
- [Go]
  ```
  package main
  import (
  "fmt"
  "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/global"
      cc "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/cc/v3"
  "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/cc/v3/model"
      region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/cc/v3/region"
  )
  func main() {
      // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
      // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
      ak := os.Getenv("CLOUD_SDK_AK")
      sk := os.Getenv("CLOUD_SDK_SK")
      auth, err := global.NewCredentialsBuilder().
          WithAk(ak).
          WithSk(sk).
          SafeBuild()
      if err != nil {
          fmt.Println(err)
          return
      }
      hcClient, err := cc.CcClientBuilder().
           WithRegion(region.ValueOf("<YOUR REGION>")).
           WithCredential(auth).
           SafeBuild()
      if err != nil {
          fmt.Println(err)
          return
      }
      client := cc.NewCcClient(hcClient)
      request := &model.ListCentralNetworkPolicyChangeSetRequest{}
  request.PolicyId = "{policy_id}"
  request.CentralNetworkId = "{central_network_id}"
  response, err := client.ListCentralNetworkPolicyChangeSet(request)
  if err == nil {
          fmt.Printf("%+v\n", response)
      } else {
          fmt.Println(err)
      }
  }
  ```
- [更多]
  更多编程语言的SDK代码示例，请参见[API Explorer](https://console.huaweicloud.com/apiexplorer/#/openapi/CC/sdk?api=ListCentralNetworkPolicyChangeSet&version=v3)的代码示例页签，可生成自动对应的SDK代码示例。
#### 状态码
| 状态码 | 描述                   |
|:---|:---|
| 200 | 查询与当前应用中心网络策略的变化集成功。 |
   
#### 错误码
请参见[错误码](https://support.huaweicloud.com/api-cc/ErrorCode.html)。
