使用 for JavaScript （v3） SDK的 Kinesis 範例 - AWS SDK for JavaScript
動作無伺服器範例

AWS SDK for JavaScript V3 API參考指南詳細描述 AWS SDK for JavaScript 第 3 版 （V3） 的所有API操作。

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 for JavaScript （v3） SDK的 Kinesis 範例

下列程式碼範例示範如何使用 AWS SDK for JavaScript （v3） 搭配 Kinesis 來執行動作和實作常見案例。

Actions 是大型程式的程式碼摘錄，必須在內容中執行。雖然動作會示範如何呼叫個別服務函數，但您可以在其相關案例中查看內容中的動作。

每個範例都包含完整原始程式碼的連結，您可以在其中找到如何在內容中設定和執行程式碼的指示。

動作

下列程式碼範例示範如何使用 PutRecords。

SDK 適用於 JavaScript （v3）
注意

還有更多 。 GitHub尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


import { PutRecordsCommand, KinesisClient } from "@aws-sdk/client-kinesis";

/**
 * Put multiple records into a Kinesis stream.
 * @param {{ streamArn: string }} config
 */
export const main = async ({ streamArn }) => {
  const client = new KinesisClient({});
  try {
    await client.send(
      new PutRecordsCommand({
        StreamARN: streamArn,
        Records: [
          {
            Data: new Uint8Array(),
            /**
             * Determines which shard in the stream the data record is assigned to.
             * Partition keys are Unicode strings with a maximum length limit of 256
             * characters for each key. Amazon Kinesis Data Streams uses the partition
             * key as input to a hash function that maps the partition key and
             * associated data to a specific shard.
             */
            PartitionKey: "TEST_KEY",
          },
          {
            Data: new Uint8Array(),
            PartitionKey: "TEST_KEY",
          },
        ],
      }),
    );
  } catch (caught) {
    if (caught instanceof Error) {
      //
    } else {
      throw caught;
    }
  }
};

// Call function if run directly.
import { fileURLToPath } from "node:url";
import { parseArgs } from "node:util";

if (process.argv[1] === fileURLToPath(import.meta.url)) {
  const options = {
    streamArn: {
      type: "string",
      description: "The ARN of the stream.",
    },
  };

  const { values } = parseArgs({ options });
  main(values);
}

  • 如需API詳細資訊，請參閱 參考 PutRecords中的 。 AWS SDK for JavaScript API

無伺服器範例

下列程式碼範例示範如何實作 Lambda 函數，該函數接收從 Kinesis 串流接收記錄所觸發的事件。此函數會擷取 Kinesis 承載、從 Base64 解碼，並記錄記錄內容。

SDK 適用於 JavaScript （v3）
注意

還有更多 。 GitHub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 搭配 Lambda 使用 Kinesis 事件 JavaScript。

// 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 Lambda 使用 Kinesis 事件 TypeScript。

// 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;
}

下列程式碼範例示範如何針對從 Kinesis 串流接收事件的 Lambda 函數實作部分批次回應。此函數會在回應中報告批次項目失敗，指示 Lambda 稍後重試這些訊息。

SDK 適用於 JavaScript （v3）
注意

還有更多 。 GitHub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 報告 Kinesis 批次項目失敗。

// 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}`);
      /* Since we are working with streams, we can return the failed item immediately.
            Lambda will immediately begin to retry processing from this failed item onwards. */
      return {
        batchItemFailures: [{ itemIdentifier: record.kinesis.sequenceNumber }],
      };
    }
  }
  console.log(`Successfully processed ${event.Records.length} records.`);
  return { batchItemFailures: [] };
};

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 向 Lambda 報告 Kinesis 批次項目失敗 TypeScript。

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
import {
  KinesisStreamEvent,
  Context,
  KinesisStreamHandler,
  KinesisStreamRecordPayload,
  KinesisStreamBatchResponse,
} 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<KinesisStreamBatchResponse> => {
  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}`);
      /* Since we are working with streams, we can return the failed item immediately.
            Lambda will immediately begin to retry processing from this failed item onwards. */
      return {
        batchItemFailures: [{ itemIdentifier: record.kinesis.sequenceNumber }],
      };
    }
  }
  logger.info(`Successfully processed ${event.Records.length} records.`);
  return { batchItemFailures: [] };
};

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;
}