DeviceRegistryEnrich 活动

通过该deviceRegistryEnrich活动，您可以将 Amazon IoT 设备注册表中的数据添加到消息负载中。例如，给定了以下消息：

{
    "temp": 50,
    "hum": 40,
    "device" {
        "thingName": "my-thing"
    }
}

和类似下面这样的 deviceRegistryEnrich 活动：

{
    "deviceRegistryEnrich": {
        "name": "MyDeviceRegistryEnrichActivity",
        "attribute": "metadata",
        "thingName": "device.thingName",
        "roleArn": "arn:aws:iam::<your-account-number>:role:MyEnrichRole",
        "next": "MyDatastoreActivity"
    }
}

输出消息现在如此示例所示。

{
    "temp" : 50,
    "hum" : 40,
    "device" {
        "thingName" : "my-thing"
    },
    "metadata" : {
        "defaultClientId": "my-thing",
        "thingTypeName": "my-thing",
        "thingArn": "arn:aws:iot:us-east-1:<your-account-number>:thing/my-thing",
        "version": 1,
        "thingName": "my-thing",
        "attributes": {},
        "thingId": "aaabbbccc-dddeeef-gghh-jjkk-llmmnnoopp"
    }
}

您必须在活动定义的 roleArn 字段中指定已附加适当权限的角色。该角色必须具有类似以下示例的权限策略。

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "iot:DescribeThing"
            ],
            "Resource": [
                "arn:aws:iot:<region>:<account-id>:thing/<thing-name>"
            ]
        }
    ]
}

和类似如下的信任策略：

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "",
            "Effect": "Allow",
            "Principal": {
                "Service": "iotanalytics.amazonaws.com"
            },
            "Action": [
                "sts:AssumeRole"
            ]
        }
    ]
}