Buat item DynamoDB dengan menggunakan TTL AWS SDK - Amazon DynamoDB

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Buat item DynamoDB dengan menggunakan TTL AWS SDK

Contoh kode berikut menunjukkan cara membuat item denganTTL.

Java
SDKuntuk Java 2.x
package com.amazon.samplelib.ttl; import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.dynamodb.DynamoDbClient; import software.amazon.awssdk.services.dynamodb.model.AttributeValue; import software.amazon.awssdk.services.dynamodb.model.DynamoDbException; import software.amazon.awssdk.services.dynamodb.model.PutItemRequest; import software.amazon.awssdk.services.dynamodb.model.PutItemResponse; import software.amazon.awssdk.services.dynamodb.model.ResourceNotFoundException; import software.amazon.awssdk.utils.ImmutableMap; import java.io.Serializable; import java.util.Map; import java.util.Optional; public class CreateTTL { public static void main(String[] args) { final String usage = """ Usage: <tableName> <primaryKey> <sortKey> <region> Where: tableName - The Amazon DynamoDB table being queried. primaryKey - The name of the primary key. Also known as the hash or partition key. sortKey - The name of the sort key. Also known as the range attribute. region (optional) - The AWS region that the Amazon DynamoDB table is located in. (Default: us-east-1) """; // Optional "region" parameter - if args list length is NOT 3 or 4, short-circuit exit. if (!(args.length == 3 || args.length == 4)) { System.out.println(usage); System.exit(1); } String tableName = args[0]; String primaryKey = args[1]; String sortKey = args[2]; Region region = Optional.ofNullable(args[3]).isEmpty() ? Region.US_EAST_1 : Region.of(args[3]); // Get current time in epoch second format final long createDate = System.currentTimeMillis() / 1000; // Calculate expiration time 90 days from now in epoch second format final long expireDate = createDate + (90 * 24 * 60 * 60); final ImmutableMap<String, ? extends Serializable> itemMap = ImmutableMap.of("primaryKey", primaryKey, "sortKey", sortKey, "creationDate", createDate, "expireAt", expireDate); final PutItemRequest request = PutItemRequest.builder() .tableName(tableName) .item((Map<String, AttributeValue>) itemMap) .build(); try (DynamoDbClient ddb = DynamoDbClient.builder() .region(region) .build()) { final PutItemResponse response = ddb.putItem(request); System.out.println(tableName + " PutItem operation with TTL successful. Request id is " + response.responseMetadata().requestId()); } catch (ResourceNotFoundException e) { System.err.format("Error: The Amazon DynamoDB table \"%s\" can't be found.\n", tableName); System.exit(1); } catch (DynamoDbException e) { System.err.println(e.getMessage()); System.exit(1); } System.exit(0); } }
  • Untuk API detailnya, lihat PutItemdi AWS SDK for Java 2.x APIReferensi.

JavaScript
SDKuntuk JavaScript (v3)
import { DynamoDBClient, PutItemCommand } from "@aws-sdk/client-dynamodb"; function createDynamoDBItem(table_name, region, partition_key, sort_key) { const client = new DynamoDBClient({ region: region, endpoint: `https://dynamodb.${region}.amazonaws.com` }); // Get the current time in epoch second format const current_time = Math.floor(new Date().getTime() / 1000); // Calculate the expireAt time (90 days from now) in epoch second format const expire_at = Math.floor((new Date().getTime() + 90 * 24 * 60 * 60 * 1000) / 1000); // Create DynamoDB item const item = { 'partitionKey': {'S': partition_key}, 'sortKey': {'S': sort_key}, 'createdAt': {'N': current_time.toString()}, 'expireAt': {'N': expire_at.toString()} }; const putItemCommand = new PutItemCommand({ TableName: table_name, Item: item, ProvisionedThroughput: { ReadCapacityUnits: 1, WriteCapacityUnits: 1, }, }); client.send(putItemCommand, function(err, data) { if (err) { console.log("Exception encountered when creating item %s, here's what happened: ", data, ex); throw err; } else { console.log("Item created successfully: %s.", data); return data; } }); } // use your own values createDynamoDBItem('your-table-name', 'us-east-1', 'your-partition-key-value', 'your-sort-key-value');
  • Untuk API detailnya, lihat PutItemdi AWS SDK for JavaScript APIReferensi.

Python
SDKuntuk Python (Boto3)
import boto3 from datetime import datetime, timedelta def create_dynamodb_item(table_name, region, primary_key, sort_key): """ Creates a DynamoDB item with an attached expiry attribute. :param table_name: Table name for the boto3 resource to target when creating an item :param region: string representing the AWS region. Example: `us-east-1` :param primary_key: one attribute known as the partition key. :param sort_key: Also known as a range attribute. :return: Void (nothing) """ try: dynamodb = boto3.resource('dynamodb', region_name=region) table = dynamodb.Table(table_name) # Get the current time in epoch second format current_time = int(datetime.now().timestamp()) # Calculate the expiration time (90 days from now) in epoch second format expiration_time = int((datetime.now() + timedelta(days=90)).timestamp()) item = { 'primaryKey': primary_key, 'sortKey': sort_key, 'creationDate': current_time, 'expireAt': expiration_time } table.put_item(Item=item) print("Item created successfully.") except Exception as e: print(f"Error creating item: {e}") raise # Use your own values create_dynamodb_item('your-table-name', 'us-west-2', 'your-partition-key-value', 'your-sort-key-value')
  • Untuk API detailnya, lihat PutItem AWSSDKReferensi Python (Boto3). API

Untuk daftar lengkap panduan AWS SDK pengembang dan contoh kode, lihatMenggunakan DynamoDB dengan AWS SDK. Topik ini juga mencakup informasi tentang memulai dan detail tentang SDK versi sebelumnya.