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# 在亚马逊中使用事件 JSON 创建架构 EventBridge
<a name="eb-schemas-infer-from-json"></a>

如果您有事件的 JSON，则可以自动为该类型的事件创建架构。

**基于事件的 JSON 创建架构**

1. 打开 Amazon EventBridge 控制台，网址为[https://console.aws.amazon.com/events/](https://console.amazonaws.cn/events/)。

1. 在导航窗格中，选择**架构**，然后选择**创建架构**。

1. （可选）选择或创建架构注册表。

1. 在 **Schema details (架构详细信息)** 下，输入架构的名称。

1. （可选）输入所创建架构的描述。

1. **架构类型**选择 **OpenAPI 3.0**。

    JSONSchema 当你根据事件的 JSON 创建架构时，你不能使用。

1. 选择 **Discover from JSON (从 JSON 中发现)**

1. 在 **JSON** 下的文本框中，粘贴或拖动事件的 JSON 源。

   例如，对于执行失败，您可以粘贴此 Amazon Step Functions 事件的源代码。

   ```
   {
       "version": "0",
       "id": "315c1398-40ff-a850-213b-158f73e60175",
       "detail-type": "Step Functions Execution Status Change",
       "source": "aws.states",
       "account": "012345678912",
       "time": "2019-02-26T19:42:21Z",
       "region": "us-east-1",
       "resources": [
         "arn:aws:states:us-east-1:012345678912:execution:state-machine-name:execution-name"
       ],
       "detail": {
           "executionArn": "arn:aws:states:us-east-1:012345678912:execution:state-machine-name:execution-name",
           "stateMachineArn": "arn:aws:states:us-east-1:012345678912:stateMachine:state-machine",
           "name": "execution-name",
           "status": "FAILED",
           "startDate": 1551225146847,
           "stopDate": 1551225151881,
           "input": "{}",
           "output": null
       }
   }
   ```

1. 选择 **发现架构**。

1. EventBridge 为该事件生成一个 OpenAPI 架构。例如，以下架构是为上一 Step Functions 事件生成的。

   ```
   {
     "openapi": "3.0.0",
     "info": {
       "version": "1.0.0",
       "title": "StepFunctionsExecutionStatusChange"
     },
     "paths": {},
     "components": {
       "schemas": {
         "AWSEvent": {
           "type": "object",
           "required": ["detail-type", "resources", "detail", "id", "source", "time", "region", "version", "account"],
           "x-amazon-events-detail-type": "Step Functions Execution Status Change",
           "x-amazon-events-source": "aws.states",
           "properties": {
             "detail": {
               "$ref": "#/components/schemas/StepFunctionsExecutionStatusChange"
             },
             "account": {
               "type": "string"
             },
             "detail-type": {
               "type": "string"
             },
             "id": {
               "type": "string"
             },
             "region": {
               "type": "string"
             },
             "resources": {
               "type": "array",
               "items": {
                 "type": "string"
               }
             },
             "source": {
               "type": "string"
             },
             "time": {
               "type": "string",
               "format": "date-time"
             },
             "version": {
               "type": "string"
             }
           }
         },
         "StepFunctionsExecutionStatusChange": {
           "type": "object",
           "required": ["output", "input", "executionArn", "name", "stateMachineArn", "startDate", "stopDate", "status"],
           "properties": {
             "executionArn": {
               "type": "string"
             },
             "input": {
               "type": "string"
             },
             "name": {
               "type": "string"
             },
             "output": {},
             "startDate": {
               "type": "integer",
               "format": "int64"
             },
             "stateMachineArn": {
               "type": "string"
             },
             "status": {
               "type": "string"
             },
             "stopDate": {
               "type": "integer",
               "format": "int64"
             }
           }
         }
       }
     }
   }
   ```

1. 生成架构后，选择**创建**。