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使用 Kinesis 觸發條件調用 Lambda 函數 - AWS SDK 程式碼範例

文件 AWS 開發套件範例 GitHub 儲存庫中有更多可用的 AWS SDK 範例

本文為英文版的機器翻譯版本,如內容有任何歧義或不一致之處,概以英文版為準。

文件 AWS 開發套件範例 GitHub 儲存庫中有更多可用的 AWS SDK 範例

本文為英文版的機器翻譯版本,如內容有任何歧義或不一致之處,概以英文版為準。

使用 Kinesis 觸發條件調用 Lambda 函數

下列程式碼範例示範如何實作 Lambda 函數,以便接收在收到來自 Kinesis 串流的訊息時觸發的事件。此函數會擷取 Kinesis 承載、從 Base64 解碼,並記錄記錄內容。

.NET
AWS SDK for .NET
注意

GitHub 上提供更多範例。尋找完整範例,並了解如何在無伺服器範例儲存庫中設定和執行。

使用 .NET 搭配 Lambda 來使用 Kinesis 事件。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 using System.Text; using Amazon.Lambda.Core; using Amazon.Lambda.KinesisEvents; using AWS.Lambda.Powertools.Logging; // 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 KinesisIntegrationSampleCode; public class Function { // Powertools Logger requires an environment variables against your function // POWERTOOLS_SERVICE_NAME [Logging(LogEvent = true)] public async Task FunctionHandler(KinesisEvent evnt, ILambdaContext context) { if (evnt.Records.Count == 0) { Logger.LogInformation("Empty Kinesis Event received"); return; } foreach (var record in evnt.Records) { try { Logger.LogInformation($"Processed Event with EventId: {record.EventId}"); string data = await GetRecordDataAsync(record.Kinesis, context); Logger.LogInformation($"Data: {data}"); // TODO: Do interesting work based on the new data } catch (Exception ex) { Logger.LogError($"An error occurred {ex.Message}"); throw; } } Logger.LogInformation($"Successfully processed {evnt.Records.Count} records."); } private async Task<string> GetRecordDataAsync(KinesisEvent.Record record, ILambdaContext context) { byte[] bytes = record.Data.ToArray(); string data = Encoding.UTF8.GetString(bytes); await Task.CompletedTask; //Placeholder for actual async work return data; } }
Go
SDK for Go V2
注意

GitHub 上提供更多範例。尋找完整範例,並了解如何在無伺服器範例儲存庫中設定和執行。

使用 Go 搭配 Lambda 來使用 Kinesis 事件。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 package main import ( "context" "log" "github.com/aws/aws-lambda-go/events" "github.com/aws/aws-lambda-go/lambda" ) func handler(ctx context.Context, kinesisEvent events.KinesisEvent) error { if len(kinesisEvent.Records) == 0 { log.Printf("empty Kinesis event received") return nil } for _, record := range kinesisEvent.Records { log.Printf("processed Kinesis event with EventId: %v", record.EventID) recordDataBytes := record.Kinesis.Data recordDataText := string(recordDataBytes) log.Printf("record data: %v", recordDataText) // TODO: Do interesting work based on the new data } log.Printf("successfully processed %v records", len(kinesisEvent.Records)) return nil } func main() { lambda.Start(handler) }
Java
SDK for Java 2.x
注意

GitHub 上提供更多範例。尋找完整範例,並了解如何在無伺服器範例儲存庫中設定和執行。

使用 Java 搭配 Lambda 來使用 Kinesis 事件。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 package example; import com.amazonaws.services.lambda.runtime.Context; import com.amazonaws.services.lambda.runtime.LambdaLogger; import com.amazonaws.services.lambda.runtime.RequestHandler; import com.amazonaws.services.lambda.runtime.events.KinesisEvent; public class Handler implements RequestHandler<KinesisEvent, Void> { @Override public Void handleRequest(final KinesisEvent event, final Context context) { LambdaLogger logger = context.getLogger(); if (event.getRecords().isEmpty()) { logger.log("Empty Kinesis Event received"); return null; } for (KinesisEvent.KinesisEventRecord record : event.getRecords()) { try { logger.log("Processed Event with EventId: "+record.getEventID()); String data = new String(record.getKinesis().getData().array()); logger.log("Data:"+ data); // TODO: Do interesting work based on the new data } catch (Exception ex) { logger.log("An error occurred:"+ex.getMessage()); throw ex; } } logger.log("Successfully processed:"+event.getRecords().size()+" records"); return null; } }
JavaScript
SDK for JavaScript (v3)
注意

GitHub 上提供更多範例。尋找完整範例,並了解如何在無伺服器範例儲存庫中設定和執行。

使用 JavaScript 搭配 Lambda 來使用 Kinesis 事件。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 exports.handler = async (event, context) => { for (const record of event.Records) { try { console.log(`Processed Kinesis Event - EventID: ${record.eventID}`); const recordData = await getRecordDataAsync(record.kinesis); console.log(`Record Data: ${recordData}`); // TODO: Do interesting work based on the new data } catch (err) { console.error(`An error occurred ${err}`); throw err; } } console.log(`Successfully processed ${event.Records.length} records.`); }; async function getRecordDataAsync(payload) { var data = Buffer.from(payload.data, "base64").toString("utf-8"); await Promise.resolve(1); //Placeholder for actual async work return data; }

使用 TypeScript 搭配 Lambda 來使用 Kinesis 事件。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 import { KinesisStreamEvent, Context, KinesisStreamHandler, KinesisStreamRecordPayload, } from "aws-lambda"; import { Buffer } from "buffer"; import { Logger } from "@aws-lambda-powertools/logger"; const logger = new Logger({ logLevel: "INFO", serviceName: "kinesis-stream-handler-sample", }); export const functionHandler: KinesisStreamHandler = async ( event: KinesisStreamEvent, context: Context ): Promise<void> => { for (const record of event.Records) { try { logger.info(`Processed Kinesis Event - EventID: ${record.eventID}`); const recordData = await getRecordDataAsync(record.kinesis); logger.info(`Record Data: ${recordData}`); // TODO: Do interesting work based on the new data } catch (err) { logger.error(`An error occurred ${err}`); throw err; } logger.info(`Successfully processed ${event.Records.length} records.`); } }; async function getRecordDataAsync( payload: KinesisStreamRecordPayload ): Promise<string> { var data = Buffer.from(payload.data, "base64").toString("utf-8"); await Promise.resolve(1); //Placeholder for actual async work return data; }
PHP
SDK for PHP
注意

GitHub 上提供更多範例。尋找完整範例,並了解如何在無伺服器範例儲存庫中設定和執行。

使用 PHP 搭配 Lambda 來使用 Kinesis 事件。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 <?php # using bref/bref and bref/logger for simplicity use Bref\Context\Context; use Bref\Event\Kinesis\KinesisEvent; use Bref\Event\Kinesis\KinesisHandler; use Bref\Logger\StderrLogger; require __DIR__ . '/vendor/autoload.php'; class Handler extends KinesisHandler { private StderrLogger $logger; public function __construct(StderrLogger $logger) { $this->logger = $logger; } /** * @throws JsonException * @throws \Bref\Event\InvalidLambdaEvent */ public function handleKinesis(KinesisEvent $event, Context $context): void { $this->logger->info("Processing records"); $records = $event->getRecords(); foreach ($records as $record) { $data = $record->getData(); $this->logger->info(json_encode($data)); // TODO: Do interesting work based on the new data // Any exception thrown will be logged and the invocation will be marked as failed } $totalRecords = count($records); $this->logger->info("Successfully processed $totalRecords records"); } } $logger = new StderrLogger(); return new Handler($logger);
Python
SDK for Python (Boto3)
注意

GitHub 上提供更多範例。尋找完整範例,並了解如何在無伺服器範例儲存庫中設定和執行。

使用 Python 搭配 Lambda 來使用 Kinesis 事件。

# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. # SPDX-License-Identifier: Apache-2.0 import base64 def lambda_handler(event, context): for record in event['Records']: try: print(f"Processed Kinesis Event - EventID: {record['eventID']}") record_data = base64.b64decode(record['kinesis']['data']).decode('utf-8') print(f"Record Data: {record_data}") # TODO: Do interesting work based on the new data except Exception as e: print(f"An error occurred {e}") raise e print(f"Successfully processed {len(event['Records'])} records.")
Ruby
SDK for Ruby
注意

GitHub 上提供更多範例。尋找完整範例,並了解如何在無伺服器範例儲存庫中設定和執行。

使用 Ruby 搭配 Lambda 來使用 Kinesis 事件。

# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. # SPDX-License-Identifier: Apache-2.0 require 'aws-sdk' def lambda_handler(event:, context:) event['Records'].each do |record| begin puts "Processed Kinesis Event - EventID: #{record['eventID']}" record_data = get_record_data_async(record['kinesis']) puts "Record Data: #{record_data}" # TODO: Do interesting work based on the new data rescue => err $stderr.puts "An error occurred #{err}" raise err end end puts "Successfully processed #{event['Records'].length} records." end def get_record_data_async(payload) data = Base64.decode64(payload['data']).force_encoding('UTF-8') # Placeholder for actual async work # You can use Ruby's asynchronous programming tools like async/await or fibers here. return data end
Rust
SDK for Rust
注意

GitHub 上提供更多範例。尋找完整範例,並了解如何在無伺服器範例儲存庫中設定和執行。

使用 Rust 搭配 Lambda 來使用 Kinesis 事件。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 use aws_lambda_events::event::kinesis::KinesisEvent; use lambda_runtime::{run, service_fn, Error, LambdaEvent}; async fn function_handler(event: LambdaEvent<KinesisEvent>) -> Result<(), Error> { if event.payload.records.is_empty() { tracing::info!("No records found. Exiting."); return Ok(()); } event.payload.records.iter().for_each(|record| { tracing::info!("EventId: {}",record.event_id.as_deref().unwrap_or_default()); let record_data = std::str::from_utf8(&record.kinesis.data); match record_data { Ok(data) => { // log the record data tracing::info!("Data: {}", data); } Err(e) => { tracing::error!("Error: {}", e); } } }); tracing::info!( "Successfully processed {} records", event.payload.records.len() ); Ok(()) } #[tokio::main] async fn main() -> Result<(), Error> { tracing_subscriber::fmt() .with_max_level(tracing::Level::INFO) // disable printing the name of the module in every log line. .with_target(false) // disabling time is handy because CloudWatch will add the ingestion time. .without_time() .init(); run(service_fn(function_handler)).await }
AWS SDK for .NET
注意

GitHub 上提供更多範例。尋找完整範例,並了解如何在無伺服器範例儲存庫中設定和執行。

使用 .NET 搭配 Lambda 來使用 Kinesis 事件。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 using System.Text; using Amazon.Lambda.Core; using Amazon.Lambda.KinesisEvents; using AWS.Lambda.Powertools.Logging; // 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 KinesisIntegrationSampleCode; public class Function { // Powertools Logger requires an environment variables against your function // POWERTOOLS_SERVICE_NAME [Logging(LogEvent = true)] public async Task FunctionHandler(KinesisEvent evnt, ILambdaContext context) { if (evnt.Records.Count == 0) { Logger.LogInformation("Empty Kinesis Event received"); return; } foreach (var record in evnt.Records) { try { Logger.LogInformation($"Processed Event with EventId: {record.EventId}"); string data = await GetRecordDataAsync(record.Kinesis, context); Logger.LogInformation($"Data: {data}"); // TODO: Do interesting work based on the new data } catch (Exception ex) { Logger.LogError($"An error occurred {ex.Message}"); throw; } } Logger.LogInformation($"Successfully processed {evnt.Records.Count} records."); } private async Task<string> GetRecordDataAsync(KinesisEvent.Record record, ILambdaContext context) { byte[] bytes = record.Data.ToArray(); string data = Encoding.UTF8.GetString(bytes); await Task.CompletedTask; //Placeholder for actual async work return data; } }
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