文档 AWS SDK 示例 GitHub 存储库中还有更多 [S AWS DK 示例](https://github.com/awsdocs/aws-doc-sdk-examples)。

本文属于机器翻译版本。若本译文内容与英语原文存在差异，则一律以英文原文为准。

# `UpdateThingShadow`与 AWS SDK 或 CLI 配合使用
<a name="iot-data-plane_example_iot-data-plane_UpdateThingShadow_section"></a>

以下代码示例演示如何使用 `UpdateThingShadow`。

------
#### [ .NET ]

**适用于 .NET 的 SDK (v4)**  
 还有更多相关信息 GitHub。在 [AWS 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv4/IoT#code-examples)中查找完整示例，了解如何进行设置和运行。

```
    /// <summary>
    /// Updates the Thing's shadow with new state information.
    /// </summary>
    /// <param name="thingName">The name of the Thing.</param>
    /// <param name="shadowPayload">The shadow payload in JSON format.</param>
    /// <returns>True if successful, false otherwise.</returns>
    public async Task<bool> UpdateThingShadowAsync(string thingName, string shadowPayload)
    {
        try
        {
            var request = new UpdateThingShadowRequest
            {
                ThingName = thingName,
                Payload = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(shadowPayload))
            };

            await _amazonIotData.UpdateThingShadowAsync(request);
            _logger.LogInformation($"Updated shadow for Thing {thingName}");
            return true;
        }
        catch (Amazon.IotData.Model.ResourceNotFoundException ex)
        {
            _logger.LogError($"Cannot update Thing shadow - resource not found: {ex.Message}");
            return false;
        }
        catch (Exception ex)
        {
            _logger.LogError($"Couldn't update Thing shadow. Here's why: {ex.Message}");
            return false;
        }
    }
```
+  有关 API 的详细信息，请参阅 *适用于 .NET 的 AWS SDK API 参考[UpdateThingShadow](https://docs.aws.amazon.com/goto/DotNetSDKV4/iot-data-2015-05-28/UpdateThingShadow)*中的。

------
#### [ C\$1\$1 ]

**SDK for C\$1\$1**  
 还有更多相关信息 GitHub。在 [AWS 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/iot#code-examples)中查找完整示例，了解如何进行设置和运行。

```
//! Update the shadow of an AWS IoT thing.
/*!
  \param thingName: The name for the thing.
  \param document: The state information, in JSON format.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::IoT::updateThingShadow(const Aws::String &thingName,
                                    const Aws::String &document,
                                    const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::IoTDataPlane::IoTDataPlaneClient iotDataPlaneClient(clientConfiguration);
    Aws::IoTDataPlane::Model::UpdateThingShadowRequest updateThingShadowRequest;
    updateThingShadowRequest.SetThingName(thingName);
    std::shared_ptr<std::stringstream> streamBuf = std::make_shared<std::stringstream>(
            document);
    updateThingShadowRequest.SetBody(streamBuf);
    Aws::IoTDataPlane::Model::UpdateThingShadowOutcome outcome = iotDataPlaneClient.UpdateThingShadow(
            updateThingShadowRequest);
    if (outcome.IsSuccess()) {
        std::cout << "Successfully updated thing shadow." << std::endl;
    }
    else {
        std::cerr << "Error while updating thing shadow."
                  << outcome.GetError().GetMessage() << std::endl;
    }

    return outcome.IsSuccess();
}
```
+  有关 API 的详细信息，请参阅 *适用于 C\$1\$1 的 AWS SDK API 参考[UpdateThingShadow](https://docs.aws.amazon.com/goto/SdkForCpp/iot-data-2015-05-28/UpdateThingShadow)*中的。

------
#### [ CLI ]

**AWS CLI**  
**更新事物影子**  
以下 `update-thing-shadow` 示例修改了指定事物的设备影子的当前状态并将其保存到文件 `output.txt` 中。  

```
aws iot-data update-thing-shadow \
    --thing-name MyRPi \
    --payload "{"state":{"reported":{"moisture":"okay"}}}" \
    "output.txt"
```
该命令不会在显示屏上生成任何输出，但以下显示了 `output.txt` 的内容：  

```
{
    "state": {
        "reported": {
            "moisture": "okay"
        }
    },
    "metadata": {
        "reported": {
            "moisture": {
                "timestamp": 1560270036
            }
        }
    },
    "version": 2,
    "timestamp": 1560270036
}
```
有关更多信息，请参阅《AWS IoT 开发人员指南》**中的[设备影子服务数据流](https://docs.aws.amazon.com/iot/latest/developerguide/device-shadow-data-flow.html)。  
+  有关 API 的详细信息，请参阅*AWS CLI 命令参考[UpdateThingShadow](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/iot-data/update-thing-shadow.html)*中的。

------
#### [ Java ]

**适用于 Java 的 SDK 2.x**  
 还有更多相关信息 GitHub。在 [AWS 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/iot#code-examples)中查找完整示例，了解如何进行设置和运行。

```
    /**
     * Updates the shadow of an IoT Thing asynchronously.
     *
     * @param thingName The name of the IoT Thing.
     *
     * This method initiates an asynchronous request to update the shadow of an IoT Thing.
     * If the request is successful, it prints a confirmation message.
     * If an exception occurs, it prints the error message.
     */
    public void updateShadowThing(String thingName) {
        // Create Thing Shadow State Document.
        String stateDocument = "{\"state\":{\"reported\":{\"temperature\":25, \"humidity\":50}}}";
        SdkBytes data = SdkBytes.fromString(stateDocument, StandardCharsets.UTF_8);
        UpdateThingShadowRequest updateThingShadowRequest = UpdateThingShadowRequest.builder()
            .thingName(thingName)
            .payload(data)
            .build();

        CompletableFuture<UpdateThingShadowResponse> future = getAsyncDataPlaneClient().updateThingShadow(updateThingShadowRequest);
        future.whenComplete((updateResponse, ex) -> {
            if (updateResponse != null) {
                System.out.println("Thing Shadow updated successfully.");
            } else {
                Throwable cause = ex != null ? ex.getCause() : null;
                if (cause instanceof IotException) {
                    System.err.println(((IotException) cause).awsErrorDetails().errorMessage());
                } else if (cause != null) {
                    System.err.println("Unexpected error: " + cause.getMessage());
                } else {
                    System.err.println("Failed to update Thing Shadow.");
                }
            }
        });

        future.join();
    }
```
+  有关 API 的详细信息，请参阅 *AWS SDK for Java 2.x API 参考[UpdateThingShadow](https://docs.aws.amazon.com/goto/SdkForJavaV2/iot-data-2015-05-28/UpdateThingShadow)*中的。

------
#### [ Kotlin ]

**适用于 Kotlin 的 SDK**  
 还有更多相关信息 GitHub。在 [AWS 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/iot#code-examples)中查找完整示例，了解如何进行设置和运行。

```
suspend fun updateShawdowThing(thingNameVal: String?) {
    // Create the thing shadow state document.
    val stateDocument = "{\"state\":{\"reported\":{\"temperature\":25, \"humidity\":50}}}"
    val byteStream: ByteStream = ByteStream.fromString(stateDocument)
    val byteArray: ByteArray = byteStream.toByteArray()

    val updateThingShadowRequest =
        UpdateThingShadowRequest {
            thingName = thingNameVal
            payload = byteArray
        }

    IotDataPlaneClient.fromEnvironment { region = "us-east-1" }.use { iotPlaneClient ->
        iotPlaneClient.updateThingShadow(updateThingShadowRequest)
        println("The thing shadow was updated successfully.")
    }
}
```
+  有关 API 的详细信息，请参阅适用[UpdateThingShadow](https://sdk.amazonaws.com/kotlin/api/latest/index.html)于 K *otlin 的AWS SDK API 参考*。

------
#### [ Python ]

**适用于 Python 的 SDK（Boto3）**  
 还有更多相关信息 GitHub。在 [AWS 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/iot#code-examples)中查找完整示例，了解如何进行设置和运行。

```
class IoTWrapper:
    """Encapsulates AWS IoT actions."""

    def __init__(self, iot_client, iot_data_client=None):
        """
        :param iot_client: A Boto3 AWS IoT client.
        :param iot_data_client: A Boto3 AWS IoT Data Plane client.
        """
        self.iot_client = iot_client
        self.iot_data_client = iot_data_client

    @classmethod
    def from_client(cls):
        iot_client = boto3.client("iot")
        iot_data_client = boto3.client("iot-data")
        return cls(iot_client, iot_data_client)

    def update_thing_shadow(self, thing_name, shadow_state):
        """
        Updates the shadow for an AWS IoT thing.

        :param thing_name: The name of the thing.
        :param shadow_state: The shadow state as a dictionary.
        """
        import json
        try:
            self.iot_data_client.update_thing_shadow(
                thingName=thing_name, payload=json.dumps(shadow_state)
            )
            logger.info("Updated shadow for thing %s.", thing_name)
        except ClientError as err:
            if err.response["Error"]["Code"] == "ResourceNotFoundException":
                logger.error("Cannot update thing shadow. Resource not found.")
                return
            logger.error(
                "Couldn't update thing shadow. Here's why: %s: %s",
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
```
+  有关 API 的详细信息，请参阅适用[UpdateThingShadow](https://docs.aws.amazon.com/goto/boto3/iot-data-2015-05-28/UpdateThingShadow)于 *Python 的AWS SDK (Boto3) API 参考*。

------