CreateAssetModel 搭配 a AWS SDK 或 CLI 使用

建立資產模型

下列create-asset-model範例會建立資產模型，以定義具有下列屬性的風力發電機：

序號 - wind turbineGenerated 電源的序號 - 從 wind turbineTemperature C 產生的電源資料串流 - 風力發電機 in CelsiusTemperature F 的溫度資料串流 - 從攝氏到華氏的映射溫度資料點

aws iotsitewise create-asset-model \
    --cli-input-json file://create-wind-turbine-model.json

create-wind-turbine-model.json 的內容：

{
    "assetModelName": "Wind Turbine Model",
    "assetModelDescription": "Represents a wind turbine",
    "assetModelProperties": [
        {
            "name": "Serial Number",
            "dataType": "STRING",
            "type": {
                "attribute": {}
            }
        },
        {
            "name": "Generated Power",
            "dataType": "DOUBLE",
            "unit": "kW",
            "type": {
                "measurement": {}
            }
        },
        {
            "name": "Temperature C",
            "dataType": "DOUBLE",
            "unit": "Celsius",
            "type": {
                "measurement": {}
            }
        },
        {
            "name": "Temperature F",
            "dataType": "DOUBLE",
            "unit": "Fahrenheit",
            "type": {
                "transform": {
                    "expression": "temp_c * 9 / 5 + 32",
                    "variables": [
                        {
                            "name": "temp_c",
                            "value": {
                                "propertyId": "Temperature C"
                            }
                        }
                    ]
                }
            }
        },
        {
            "name": "Total Generated Power",
            "dataType": "DOUBLE",
            "unit": "kW",
            "type": {
                "metric": {
                    "expression": "sum(power)",
                    "variables": [
                        {
                            "name": "power",
                            "value": {
                                "propertyId": "Generated Power"
                            }
                        }
                    ],
                    "window": {
                        "tumbling": {
                            "interval": "1h"
                        }
                    }
                }
            }
        }
    ]
}

輸出：

{
    "assetModelId": "a1b2c3d4-5678-90ab-cdef-11111EXAMPLE",
    "assetModelArn": "arn:aws:iotsitewise:us-west-2:123456789012:asset-model/a1b2c3d4-5678-90ab-cdef-11111EXAMPLE",
    "assetModelStatus": {
        "state": "CREATING"
    }
}

如需詳細資訊，請參閱 AWS IoT SiteWise Word 使用者指南中的定義資產模型。

    /**
     * Creates an asset model.
     *
     * @param name the name of the asset model to create.
     * @return a {@link CompletableFuture} that represents a {@link CreateAssetModelResponse} result. The calling code
     *         can attach callbacks, then handle the result or exception by calling {@link CompletableFuture#join()} or
     *         {@link CompletableFuture#get()}.
     *         <p>
     *         If any completion stage in this method throws an exception, the method logs the exception cause and keeps it
     *         available to the calling code as a {@link CompletionException}. By calling
     *         {@link CompletionException#getCause()}, the calling code can access the original exception.
     */
    public CompletableFuture<CreateAssetModelResponse> createAssetModelAsync(String name) {
        PropertyType humidity = PropertyType.builder()
            .measurement(Measurement.builder().build())
            .build();

        PropertyType temperaturePropertyType = PropertyType.builder()
            .measurement(Measurement.builder().build())
            .build();

        AssetModelPropertyDefinition temperatureProperty = AssetModelPropertyDefinition.builder()
            .name("Temperature")
            .dataType(PropertyDataType.DOUBLE)
            .type(temperaturePropertyType)
            .build();

        AssetModelPropertyDefinition humidityProperty = AssetModelPropertyDefinition.builder()
            .name("Humidity")
            .dataType(PropertyDataType.DOUBLE)
            .type(humidity)
            .build();

        CreateAssetModelRequest createAssetModelRequest = CreateAssetModelRequest.builder()
            .assetModelName(name)
            .assetModelDescription("This is my asset model")
            .assetModelProperties(temperatureProperty, humidityProperty)
            .build();

        return getAsyncClient().createAssetModel(createAssetModelRequest)
            .whenComplete((response, exception) -> {
                if (exception != null) {
                    logger.error("Failed to create asset model: {} ", exception.getCause().getMessage());
                }
            });
    }