Créez un élément DynamoDB à l'aide d'un TTL AWS SDK - Amazon DynamoDB

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Créez un élément DynamoDB à l'aide d'un TTL AWS SDK

Les exemples de code suivants montrent comment créer un article avecTTL.

Java
SDKpour 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); } }
  • Pour API plus de détails, voir PutItemAWS SDK for Java 2.x APIRéférence.

JavaScript
SDKpour 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');
  • Pour API plus de détails, voir PutItemAWS SDK for JavaScript APIRéférence.

Python
SDKpour 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')
  • Pour API plus de détails, voir PutItemAWS SDKpour Python (Boto3) Reference. API

Pour une liste complète des AWS SDKguides du développeur et exemples de code, voirUtilisation de DynamoDB avec un AWS SDK. Cette rubrique inclut également des informations sur la mise en route et des détails sur SDK les versions précédentes.