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报告使用 Amazon SQS 触发器进行 Lambda 函数批处理项目失败 - AWS SDK 代码示例

文档 AWS SDK 示例 GitHub 存储库中还有更多 S AWS DK 示例

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。

文档 AWS SDK 示例 GitHub 存储库中还有更多 S AWS DK 示例

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。

报告使用 Amazon SQS 触发器进行 Lambda 函数批处理项目失败

以下代码示例显示如何为接收来自 SQS 队列的事件的 Lambda 函数实现部分批处理响应。该函数在响应中报告批处理项目失败,并指示 Lambda 稍后重试这些消息。

.NET
AWS SDK for .NET
注意

还有更多相关信息 GitHub。在无服务器示例存储库中查找完整示例,并了解如何进行设置和运行。

报告使用 .NET 进行 Lambda SQS 批处理项目失败。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 using Amazon.Lambda.Core; using Amazon.Lambda.SQSEvents; // Assembly attribute to enable the Lambda function's JSON input to be converted into a .NET class. [assembly: LambdaSerializer(typeof(Amazon.Lambda.Serialization.SystemTextJson.DefaultLambdaJsonSerializer))] namespace sqsSample; public class Function { public async Task<SQSBatchResponse> FunctionHandler(SQSEvent evnt, ILambdaContext context) { List<SQSBatchResponse.BatchItemFailure> batchItemFailures = new List<SQSBatchResponse.BatchItemFailure>(); foreach(var message in evnt.Records) { try { //process your message await ProcessMessageAsync(message, context); } catch (System.Exception) { //Add failed message identifier to the batchItemFailures list batchItemFailures.Add(new SQSBatchResponse.BatchItemFailure{ItemIdentifier=message.MessageId}); } } return new SQSBatchResponse(batchItemFailures); } private async Task ProcessMessageAsync(SQSEvent.SQSMessage message, ILambdaContext context) { if (String.IsNullOrEmpty(message.Body)) { throw new Exception("No Body in SQS Message."); } context.Logger.LogInformation($"Processed message {message.Body}"); // TODO: Do interesting work based on the new message await Task.CompletedTask; } }
Go
适用于 Go V2 的 SDK
注意

还有更多相关信息 GitHub。在无服务器示例存储库中查找完整示例,并了解如何进行设置和运行。

报告使用 Go 进行 Lambda SQS 批处理项目失败。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 package main import ( "context" "encoding/json" "fmt" "github.com/aws/aws-lambda-go/events" "github.com/aws/aws-lambda-go/lambda" ) func handler(ctx context.Context, sqsEvent events.SQSEvent) (map[string]interface{}, error) { batchItemFailures := []map[string]interface{}{} for _, message := range sqsEvent.Records { if /* Your message processing condition here */ { batchItemFailures = append(batchItemFailures, map[string]interface{}{"itemIdentifier": message.MessageId}) } } sqsBatchResponse := map[string]interface{}{ "batchItemFailures": batchItemFailures, } return sqsBatchResponse, nil } func main() { lambda.Start(handler) }
Java
适用于 Java 的 SDK 2.x
注意

还有更多相关信息 GitHub。在无服务器示例存储库中查找完整示例,并了解如何进行设置和运行。

报告使用 Java 进行 Lambda SQS 批处理项目失败。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 import com.amazonaws.services.lambda.runtime.Context; import com.amazonaws.services.lambda.runtime.RequestHandler; import com.amazonaws.services.lambda.runtime.events.SQSEvent; import com.amazonaws.services.lambda.runtime.events.SQSBatchResponse; import java.util.ArrayList; import java.util.List; public class ProcessSQSMessageBatch implements RequestHandler<SQSEvent, SQSBatchResponse> { @Override public SQSBatchResponse handleRequest(SQSEvent sqsEvent, Context context) { List<SQSBatchResponse.BatchItemFailure> batchItemFailures = new ArrayList<SQSBatchResponse.BatchItemFailure>(); String messageId = ""; for (SQSEvent.SQSMessage message : sqsEvent.getRecords()) { try { //process your message messageId = message.getMessageId(); } catch (Exception e) { //Add failed message identifier to the batchItemFailures list batchItemFailures.add(new SQSBatchResponse.BatchItemFailure(messageId)); } } return new SQSBatchResponse(batchItemFailures); } }
JavaScript
适用于 JavaScript (v3) 的软件开发工具包
注意

还有更多相关信息 GitHub。在无服务器示例存储库中查找完整示例,并了解如何进行设置和运行。

使用报告 Lambda JavaScript 的 SQS 批处理项目失败。

// Node.js 20.x Lambda runtime, AWS SDK for Javascript V3 export const handler = async (event, context) => { const batchItemFailures = []; for (const record of event.Records) { try { await processMessageAsync(record, context); } catch (error) { batchItemFailures.push({ itemIdentifier: record.messageId }); } } return { batchItemFailures }; }; async function processMessageAsync(record, context) { if (record.body && record.body.includes("error")) { throw new Error("There is an error in the SQS Message."); } console.log(`Processed message: ${record.body}`); }

使用报告 Lambda TypeScript 的 SQS 批处理项目失败。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 import { SQSEvent, SQSBatchResponse, Context, SQSBatchItemFailure, SQSRecord } from 'aws-lambda'; export const handler = async (event: SQSEvent, context: Context): Promise<SQSBatchResponse> => { const batchItemFailures: SQSBatchItemFailure[] = []; for (const record of event.Records) { try { await processMessageAsync(record); } catch (error) { batchItemFailures.push({ itemIdentifier: record.messageId }); } } return {batchItemFailures: batchItemFailures}; }; async function processMessageAsync(record: SQSRecord): Promise<void> { if (record.body && record.body.includes("error")) { throw new Error('There is an error in the SQS Message.'); } console.log(`Processed message ${record.body}`); }
PHP
适用于 PHP 的 SDK
注意

还有更多相关信息 GitHub。在无服务器示例存储库中查找完整示例,并了解如何进行设置和运行。

报告使用 PHP 进行 Lambda SQS 批处理项目失败。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 <?php use Bref\Context\Context; use Bref\Event\Sqs\SqsEvent; use Bref\Event\Sqs\SqsHandler; use Bref\Logger\StderrLogger; require __DIR__ . '/vendor/autoload.php'; class Handler extends SqsHandler { private StderrLogger $logger; public function __construct(StderrLogger $logger) { $this->logger = $logger; } /** * @throws JsonException * @throws \Bref\Event\InvalidLambdaEvent */ public function handleSqs(SqsEvent $event, Context $context): void { $this->logger->info("Processing SQS records"); $records = $event->getRecords(); foreach ($records as $record) { try { // Assuming the SQS message is in JSON format $message = json_decode($record->getBody(), true); $this->logger->info(json_encode($message)); // TODO: Implement your custom processing logic here } catch (Exception $e) { $this->logger->error($e->getMessage()); // failed processing the record $this->markAsFailed($record); } } $totalRecords = count($records); $this->logger->info("Successfully processed $totalRecords SQS records"); } } $logger = new StderrLogger(); return new Handler($logger);
Python
适用于 Python 的 SDK(Boto3)
注意

还有更多相关信息 GitHub。在无服务器示例存储库中查找完整示例,并了解如何进行设置和运行。

报告使用 Python 进行 Lambda SQS 批处理项目失败。

# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. # SPDX-License-Identifier: Apache-2.0 def lambda_handler(event, context): if event: batch_item_failures = [] sqs_batch_response = {} for record in event["Records"]: try: # process message except Exception as e: batch_item_failures.append({"itemIdentifier": record['messageId']}) sqs_batch_response["batchItemFailures"] = batch_item_failures return sqs_batch_response
Ruby
适用于 Ruby 的 SDK
注意

还有更多相关信息 GitHub。在无服务器示例存储库中查找完整示例,并了解如何进行设置和运行。

报告使用 Ruby 进行 Lambda SQS 批处理项目失败。

# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. # SPDX-License-Identifier: Apache-2.0 require 'json' def lambda_handler(event:, context:) if event batch_item_failures = [] sqs_batch_response = {} event["Records"].each do |record| begin # process message rescue StandardError => e batch_item_failures << {"itemIdentifier" => record['messageId']} end end sqs_batch_response["batchItemFailures"] = batch_item_failures return sqs_batch_response end end
Rust
适用于 Rust 的 SDK
注意

还有更多相关信息 GitHub。在无服务器示例存储库中查找完整示例,并了解如何进行设置和运行。

报告使用 Rust 进行 Lambda SQS 批处理项目失败。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 use aws_lambda_events::{ event::sqs::{SqsBatchResponse, SqsEvent}, sqs::{BatchItemFailure, SqsMessage}, }; use lambda_runtime::{run, service_fn, Error, LambdaEvent}; async fn process_record(_: &SqsMessage) -> Result<(), Error> { Err(Error::from("Error processing message")) } async fn function_handler(event: LambdaEvent<SqsEvent>) -> Result<SqsBatchResponse, Error> { let mut batch_item_failures = Vec::new(); for record in event.payload.records { match process_record(&record).await { Ok(_) => (), Err(_) => batch_item_failures.push(BatchItemFailure { item_identifier: record.message_id.unwrap(), }), } } Ok(SqsBatchResponse { batch_item_failures, }) } #[tokio::main] async fn main() -> Result<(), Error> { run(service_fn(function_handler)).await }
AWS SDK for .NET
注意

还有更多相关信息 GitHub。在无服务器示例存储库中查找完整示例,并了解如何进行设置和运行。

报告使用 .NET 进行 Lambda SQS 批处理项目失败。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 using Amazon.Lambda.Core; using Amazon.Lambda.SQSEvents; // Assembly attribute to enable the Lambda function's JSON input to be converted into a .NET class. [assembly: LambdaSerializer(typeof(Amazon.Lambda.Serialization.SystemTextJson.DefaultLambdaJsonSerializer))] namespace sqsSample; public class Function { public async Task<SQSBatchResponse> FunctionHandler(SQSEvent evnt, ILambdaContext context) { List<SQSBatchResponse.BatchItemFailure> batchItemFailures = new List<SQSBatchResponse.BatchItemFailure>(); foreach(var message in evnt.Records) { try { //process your message await ProcessMessageAsync(message, context); } catch (System.Exception) { //Add failed message identifier to the batchItemFailures list batchItemFailures.Add(new SQSBatchResponse.BatchItemFailure{ItemIdentifier=message.MessageId}); } } return new SQSBatchResponse(batchItemFailures); } private async Task ProcessMessageAsync(SQSEvent.SQSMessage message, ILambdaContext context) { if (String.IsNullOrEmpty(message.Body)) { throw new Exception("No Body in SQS Message."); } context.Logger.LogInformation($"Processed message {message.Body}"); // TODO: Do interesting work based on the new message await Task.CompletedTask; } }
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