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# DataBrew 使用 CloudWatch 事件自动化
<a name="monitoring.cloudwatch-events"></a>

Amazon CloudWatch Events 使您能够实现 Amazon 服务自动化，并自动响应系统事件，例如应用程序可用性问题或资源更改。来自 Amazon 服务的事件几乎实时地传递到 CloudWatch 活动。您可以编写简单规则来指示您关注的事件，并指示要在事件匹配规则时执行的自动化操作。可自动触发的操作包括：
+ 调用 Amazon EC2 运行命令
+ 将事件中继到 Amazon Kinesis Data Streams
+ 激活 Amazon Step Functions 状态机
+ 通知 Amazon SNS 主题或 Amazon SQS 队列

DataBrew 每当您的 Amazon 账户中的资源状态发生变化时，都会向 Events 报告 CloudWatch 事件。尽最大努力发出事件。

以下是几个事件的示例，显示了 DataBrew 作业的不同状态：`SUCCEEDED``FAILED`、`TIMEOUT`、和`STOPPED`。

```
{
  "version": "0",
  "id": "abcdef00-1234-5678-9abc-def012345678",
  "detail-type": "DataBrew Job State Change",
  "source": "aws.databrew",
  "account": "123456789012",
  "time": "2017-09-07T18:57:21Z",
  "region": "us-west-2",
  "resources": [],
  "detail": {
    "jobName": "MyJob",
    "severity": "INFO",
    "state": "SUCCEEDED",
    "jobRunId": "db_abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789",
    "message": "Job run succeeded"
  }
}

{
  "version": "0",
  "id": "abcdef01-1234-5678-9abc-def012345678",
  "detail-type": "DataBrew Job State Change",
  "source": "aws.databrew",
  "account": "123456789012",
  "time": "2017-09-07T06:02:03Z",
  "region": "us-west-2",
  "resources": [],
  "detail": {
    "jobName": "MyJob",
    "severity": "ERROR",
    "state": "FAILED",
    "jobRunId": "db_0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
    "message": "AnalysisException: 'Path does not exist: s3://MyBucket/MyFile;'"
  }
}

{
  "version": "0",
  "id": "abcdef00-1234-5678-9abc-def012345678",
  "detail-type": "DataBrew Job State Change",
  "source": "aws.databrew",
  "account": "123456789012",
  "time": "2017-11-20T20:22:06Z",
  "region": "us-east-2",
  "resources": [],
  "detail": {
    "jobName": "MyJob",
    "severity": "WARN",
    "state": "TIMEOUT",
    "jobRunId": "db_abc0123456789abcdef0123456789abcdef0123456789abcdef0123456789def",
    "message": "Job run timed out"
  }
}

{
  "version": "0",
  "id": "abcdef00-1234-5678-9abc-def012345678",
  "detail-type": "DataBrew Job State Change",
  "source": "aws.databrew",
  "account": "123456789012",
  "time": "2017-11-20T20:22:06Z",
  "region": "us-east-2",
  "resources": [],
  "detail": {
    "jobName": "MyJob",
    "severity": "INFO",
    "state": "STOPPED",
    "jobRunId": "db_abc0123456789abcdef0123456789abcdef0123456789abcdef0123456789def",
    "message": "Job run stopped"
  }
}
```

有关更多信息，请参阅 [Amazon CloudWatch 活动用户指南](https://docs.amazonaws.cn/AmazonCloudWatch/latest/events/)。