Le traduzioni sono generate tramite traduzione automatica. In caso di conflitto tra il contenuto di una traduzione e la versione originale in Inglese, quest'ultima prevarrà. # Utilizzo `UpdateTimeToLive` con un AWS SDK o una CLI Gli esempi di codice seguenti mostrano come utilizzare `UpdateTimeToLive`. Gli esempi di operazioni sono estratti di codice da programmi più grandi e devono essere eseguiti nel contesto. È possibile visualizzare questa operazione nel contesto nel seguente esempio di codice: + [Lavora con Streams e Time-to-Live](example_dynamodb_Scenario_StreamsAndTTL_section.md) ------ #### [ CLI ] **AWS CLI** **Come aggiornare le impostazioni Time to Live in una tabella** L’esempio `update-time-to-live` seguente abilita le impostazioni Time to Live nella tabella specificata. ``` aws dynamodb update-time-to-live \ --table-name MusicCollection \ --time-to-live-specification Enabled=true,AttributeName=ttl ``` Output: ``` { "TimeToLiveSpecification": { "Enabled": true, "AttributeName": "ttl" } } ``` Per ulteriori informazioni, consulta [Time to Live](https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/TTL.html) nella *Guida per gli sviluppatori di Amazon DynamoDB*. + Per i dettagli sull'API, consulta [UpdateTimeToLive AWS CLI](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/dynamodb/update-time-to-live.html)*Command Reference.* ------ #### [ Java ] **SDK per Java 2.x** Abilita TTL in una tabella DynamoDB esistente con AWS SDK for Java 2.x. ``` import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.dynamodb.DynamoDbClient; import software.amazon.awssdk.services.dynamodb.model.DynamoDbException; import software.amazon.awssdk.services.dynamodb.model.ResourceNotFoundException; import software.amazon.awssdk.services.dynamodb.model.TimeToLiveSpecification; import software.amazon.awssdk.services.dynamodb.model.UpdateTimeToLiveRequest; import software.amazon.awssdk.services.dynamodb.model.UpdateTimeToLiveResponse; import java.util.logging.Level; import java.util.logging.Logger; public UpdateTimeToLiveResponse enableTTL(final String tableName, final String attributeName, final Region region) { final TimeToLiveSpecification ttlSpec = TimeToLiveSpecification.builder() .attributeName(attributeName) .enabled(true) .build(); final UpdateTimeToLiveRequest request = UpdateTimeToLiveRequest.builder() .tableName(tableName) .timeToLiveSpecification(ttlSpec) .build(); try (DynamoDbClient ddb = dynamoDbClient != null ? dynamoDbClient : DynamoDbClient.builder().region(region).build()) { return ddb.updateTimeToLive(request); } catch (ResourceNotFoundException e) { System.err.format(TABLE_NOT_FOUND_ERROR, tableName); throw e; } catch (DynamoDbException e) { System.err.println(e.getMessage()); throw e; } } ``` Disabilita TTL in una tabella DynamoDB esistente con AWS SDK for Java 2.x. ``` import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.dynamodb.DynamoDbClient; import software.amazon.awssdk.services.dynamodb.model.DynamoDbException; import software.amazon.awssdk.services.dynamodb.model.ResourceNotFoundException; import software.amazon.awssdk.services.dynamodb.model.TimeToLiveSpecification; import software.amazon.awssdk.services.dynamodb.model.UpdateTimeToLiveRequest; import software.amazon.awssdk.services.dynamodb.model.UpdateTimeToLiveResponse; import java.util.logging.Level; import java.util.logging.Logger; public UpdateTimeToLiveResponse disableTTL( final String tableName, final String attributeName, final Region region) { final TimeToLiveSpecification ttlSpec = TimeToLiveSpecification.builder() .attributeName(attributeName) .enabled(false) .build(); final UpdateTimeToLiveRequest request = UpdateTimeToLiveRequest.builder() .tableName(tableName) .timeToLiveSpecification(ttlSpec) .build(); try (DynamoDbClient ddb = dynamoDbClient != null ? dynamoDbClient : DynamoDbClient.builder().region(region).build()) { return ddb.updateTimeToLive(request); } catch (ResourceNotFoundException e) { System.err.format(TABLE_NOT_FOUND_ERROR, tableName); throw e; } catch (DynamoDbException e) { System.err.println(e.getMessage()); throw e; } } ``` + Per i dettagli sull'API, [UpdateTimeToLive](https://docs.aws.amazon.com/goto/SdkForJavaV2/dynamodb-2012-08-10/UpdateTimeToLive)consulta *AWS SDK for Java 2.x API Reference*. ------ #### [ JavaScript ] **SDK per JavaScript (v3)** Abilitare TTL in una tabella DynamoDB esistente. ``` import { DynamoDBClient, UpdateTimeToLiveCommand } from "@aws-sdk/client-dynamodb"; export const enableTTL = async (tableName, ttlAttribute, region = 'us-east-1') => { const client = new DynamoDBClient({ region: region, endpoint: `https://dynamodb.${region}.amazonaws.com` }); const params = { TableName: tableName, TimeToLiveSpecification: { Enabled: true, AttributeName: ttlAttribute } }; try { const response = await client.send(new UpdateTimeToLiveCommand(params)); if (response.$metadata.httpStatusCode === 200) { console.log(`TTL enabled successfully for table ${tableName}, using attribute name ${ttlAttribute}.`); } else { console.log(`Failed to enable TTL for table ${tableName}, response object: ${response}`); } return response; } catch (e) { console.error(`Error enabling TTL: ${e}`); throw e; } }; // Example usage (commented out for testing) // enableTTL('ExampleTable', 'exampleTtlAttribute'); ``` Disabilitare TTL in una tabella DynamoDB esistente. ``` import { DynamoDBClient, UpdateTimeToLiveCommand } from "@aws-sdk/client-dynamodb"; export const disableTTL = async (tableName, ttlAttribute, region = 'us-east-1') => { const client = new DynamoDBClient({ region: region, endpoint: `https://dynamodb.${region}.amazonaws.com` }); const params = { TableName: tableName, TimeToLiveSpecification: { Enabled: false, AttributeName: ttlAttribute } }; try { const response = await client.send(new UpdateTimeToLiveCommand(params)); if (response.$metadata.httpStatusCode === 200) { console.log(`TTL disabled successfully for table ${tableName}, using attribute name ${ttlAttribute}.`); } else { console.log(`Failed to disable TTL for table ${tableName}, response object: ${response}`); } return response; } catch (e) { console.error(`Error disabling TTL: ${e}`); throw e; } }; // Example usage (commented out for testing) // disableTTL('ExampleTable', 'exampleTtlAttribute'); ``` + Per i dettagli sull'API, consulta la sezione *AWS SDK per JavaScript API [UpdateTimeToLive](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/dynamodb/command/UpdateTimeToLiveCommand)Reference*. ------ #### [ Python ] **SDK per Python (Boto3)** Abilitare TTL in una tabella DynamoDB esistente. ``` import boto3 def enable_ttl(table_name, ttl_attribute_name): """ Enables TTL on DynamoDB table for a given attribute name on success, returns a status code of 200 on error, throws an exception :param table_name: Name of the DynamoDB table :param ttl_attribute_name: The name of the TTL attribute being provided to the table. """ try: dynamodb = boto3.client("dynamodb") # Enable TTL on an existing DynamoDB table response = dynamodb.update_time_to_live( TableName=table_name, TimeToLiveSpecification={"Enabled": True, "AttributeName": ttl_attribute_name}, ) # In the returned response, check for a successful status code. if response["ResponseMetadata"]["HTTPStatusCode"] == 200: print("TTL has been enabled successfully.") else: print( f"Failed to enable TTL, status code {response['ResponseMetadata']['HTTPStatusCode']}" ) return response except Exception as ex: print("Couldn't enable TTL in table %s. Here's why: %s" % (table_name, ex)) raise # your values enable_ttl("your-table-name", "expireAt") ``` Disabilitare TTL in una tabella DynamoDB esistente. ``` import boto3 def disable_ttl(table_name, ttl_attribute_name): """ Disables TTL on DynamoDB table for a given attribute name on success, returns a status code of 200 on error, throws an exception :param table_name: Name of the DynamoDB table being modified :param ttl_attribute_name: The name of the TTL attribute being provided to the table. """ try: dynamodb = boto3.client("dynamodb") # Enable TTL on an existing DynamoDB table response = dynamodb.update_time_to_live( TableName=table_name, TimeToLiveSpecification={"Enabled": False, "AttributeName": ttl_attribute_name}, ) # In the returned response, check for a successful status code. if response["ResponseMetadata"]["HTTPStatusCode"] == 200: print("TTL has been disabled successfully.") else: print( f"Failed to disable TTL, status code {response['ResponseMetadata']['HTTPStatusCode']}" ) except Exception as ex: print("Couldn't disable TTL in table %s. Here's why: %s" % (table_name, ex)) raise # your values disable_ttl("your-table-name", "expireAt") ``` + Per i dettagli sull'API, consulta [UpdateTimeToLive AWS](https://docs.aws.amazon.com/goto/boto3/dynamodb-2012-08-10/UpdateTimeToLive)*SDK for Python (Boto3) API Reference*. ------ Per un elenco completo delle guide per sviluppatori AWS SDK e degli esempi di codice, consulta. [Utilizzo di DynamoDB con un SDK AWS](sdk-general-information-section.md) Questo argomento include anche informazioni su come iniziare e dettagli sulle versioni precedenti dell’SDK.