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Utilizzare UpdateTimeToLive
con un o AWS SDK CLI
I seguenti esempi di codice mostrano come utilizzareUpdateTimeToLive
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- CLI
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- AWS CLI
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Per aggiornare le impostazioni Time to Live su una tabella
L'
update-time-to-live
esempio seguente abilita Time to Live nella tabella specificata.aws dynamodb update-time-to-live \ --table-name
MusicCollection
\ --time-to-live-specificationEnabled=true,AttributeName=ttl
Output:
{ "TimeToLiveSpecification": { "Enabled": true, "AttributeName": "ttl" } }
Per ulteriori informazioni, consulta Time to Live nella Amazon DynamoDB Developer Guide.
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Per API i dettagli, consulta AWS CLI Command UpdateTimeToLive
Reference.
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- Java
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- SDKper Java 2.x
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Abilita TTL su una tabella DynamoDB esistente.
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.Optional; final TimeToLiveSpecification ttlSpecification = TimeToLiveSpecification.builder() .attributeName(ttlAttributeName) .enabled(true) .build(); final UpdateTimeToLiveRequest request = UpdateTimeToLiveRequest.builder() .tableName(tableName) .timeToLiveSpecification(ttlSpecification) .build(); try (DynamoDbClient ddb = DynamoDbClient.builder() .region(region) .build()) { final UpdateTimeToLiveResponse response = ddb.updateTimeToLive(request); System.out.println(tableName + " had its TTL successfully updated. The 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.out.println("Done!");
Disabilita TTL su una tabella DynamoDB esistente.
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.Optional; final Region region = Optional.ofNullable(args[2]).isEmpty() ? Region.US_EAST_1 : Region.of(args[2]); final TimeToLiveSpecification ttlSpecification = TimeToLiveSpecification.builder() .attributeName(ttlAttributeName) .enabled(false) .build(); final UpdateTimeToLiveRequest request = UpdateTimeToLiveRequest.builder() .tableName(tableName) .timeToLiveSpecification(ttlSpecification) .build(); try (DynamoDbClient ddb = DynamoDbClient.builder() .region(region) .build()) { final UpdateTimeToLiveResponse response = ddb.updateTimeToLive(request); System.out.println(tableName + " had its TTL successfully updated. The 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.out.println("Done!");
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Per API i dettagli, vedere UpdateTimeToLivein AWS SDK for Java 2.x API Reference.
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- JavaScript
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- SDKper JavaScript (v3)
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Abilita TTL su una tabella DynamoDB esistente.
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 import { DynamoDBClient, UpdateTimeToLiveCommand } from "@aws-sdk/client-dynamodb"; const enableTTL = async (tableName, ttlAttribute) => { const client = new DynamoDBClient({}); 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: ${e}`); throw e; } }; // call with your own values enableTTL('ExampleTable', 'exampleTtlAttribute');
Disabilita TTL su una tabella DynamoDB esistente.
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: Apache-2.0 import { DynamoDBClient, UpdateTimeToLiveCommand } from "@aws-sdk/client-dynamodb"; const disableTTL = async (tableName, ttlAttribute) => { const client = new DynamoDBClient({}); const params = { TableName: tableName, TimeToLiveSpecification: { Enabled: false, AttributeName: ttlAttribute } }; try { const response = await client.send(new UpdateTimeToLiveCommand(params)); if (response.$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; } }; // call with your own values disableTTL('ExampleTable', 'exampleTtlAttribute');
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Per API i dettagli, vedere UpdateTimeToLivein AWS SDK for JavaScript API Reference.
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- Python
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- SDKper Python (Boto3)
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Abilita TTL su una tabella DynamoDB esistente.
# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. # SPDX-License-Identifier: Apache-2.0 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')
Disabilita TTL su una tabella DynamoDB esistente.
# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. # SPDX-License-Identifier: Apache-2.0 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')
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Per API i dettagli, vedere UpdateTimeToLivePython (Boto3) Reference.AWS SDK API
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