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èŠãšãããããŸããŸãªãã©ã³ã¶ã¯ã·ã§ã³éãåæå®è¡ã¬ãã«ã«æè»ã«å¯Ÿå¿ã§ããã髿§èœãªãœãªã¥ãŒã·ã§ã³ãæäŸããŸãã 环ç©ãã©ã³ã¶ã¯ã·ã§ã³ã¹ã㢠环ç©ãã©ã³ã¶ã¯ã·ã§ã³ã¹ãã¢ããŒãã«ã¯ãç¹å®ã®å人ã®ååŒéé¡ã®çޝç©åãç¶æããããã«äœ¿çšãããŸãã以äžã®ããŒã¿ã¢ãã«ã䜿çšããŸã: { "indvidual_id": { "S": "TIN1" // 环ç©åèšã管çããåäœãšãªãäžæèå¥å }, "cumulative_amount_consumed": { // 䜿çšãããéé¡ã®çޝç©åèšã衚ã "N": "0" } } çšæ§é€å¯Ÿè±¡åç®ã®åšåº«ç®¡ç çšé¡æ§é€ç£æ»ã¹ãã¢ïŒTax Deduction Audit StoreïŒããŒãã«ã¯ãåååŒã®çšæ§é€çã®ç£æ»èšé²ãä¿åããããã«äœ¿çšãããŸãã以äžã®ããŒã¿ã¢ãã«ã䜿çšããŸã: { "transaction_primary_key": { "S": "XXX111#2024-01-01T13:05:28" // ãã©ã³ã¶ã¯ã·ã§ã³ã®äžæèå¥å(PartitionKey#SortKey) }, "transaction_amount": { "S": "1000". //ãã©ã³ã¶ã¯ã·ã§ã³å
šäœã®éé¡ }, "transaction_tax_amount": { "S": "100". //æ§é€ãããçšé¡ }, "transaction_tax_rate":{ "S":"10". //ãã®ãã©ã³ã¶ã¯ã·ã§ã³ã«é©çšãããçšç(ããŒã»ã³ã衚èš) } ... } æ¡ä»¶ä»ãæžã蟌ã¿ã®ã³ãŒã 次ã®ã³ãŒã㯠dynamodb.transact_write_items() ã䜿çšããŠã环ç©ãã©ã³ã¶ã¯ã·ã§ã³ã¹ãã¢ãšååŒç£æ»ã¹ãã¢ã® 2 ã€ã® DynamoDB ããŒãã«ã«ãŸãããã¢ãããã¯ãªæ¡ä»¶ä»ãæžãèŸŒã¿æäœã瀺ããŠããŸãã环ç©ãã©ã³ã¶ã¯ã·ã§ã³ã¹ãã¢ããæ¢åã®ã¬ã³ãŒããååŸããçŸåšã®ååŒéé¡ãšæ¢åããŒã¿ã«åºã¥ã㊠cumulative_amt_consumed ïŒçŽ¯ç©æ¶è²»éé¡ïŒã®æŽæ°å€ãèšç®ããŸããåæã«ãååŒç£æ»ã¹ãã¢ã«æ°ããã¬ã³ãŒããèšé²ããIDãå€ãçšé¡ãçšçãªã©ã®ãã©ã³ã¶ã¯ã·ã§ã³è©³çްãèšé²ããŸãã transact_write_items() ã¡ãœããã¯ãååŒãã©ã³ã¶ã¯ã·ã§ã³ã¹ãã¢ããŒãã«ãžã®æŽæ°æäœãšååŒç£æ»ã¹ãã¢ããŒãã«ãžã® put æäœã 1 ã€ã®ãã©ã³ã¶ã¯ã·ã§ã³ãšããŠå®è¡ããŸãã 2 ã€ã®æäœããšãã«æåããã°ãäž¡æ¹ã®ããŒãã«ã«å€æŽãã³ããããããŸããããã§ãªãå Žåã¯ããã©ã³ã¶ã¯ã·ã§ã³å
šäœãããŒã«ããã¯ãããããŒã¿ã®æŽåæ§ãä¿ãããŸãã SAMPLE_TIN = 'TIN1' # 环ç©ãã©ã³ã¶ã¯ã·ã§ã³ã¹ãã¢ã«ãããäžæã®èå¥åã衚ã SAMPLE_AMOUNT = 5000 # transact_write_items ã§åŠçããã売äžå€ã衚ã SAMPLE_TRANSACTION_ID = 'XXX111' DEFAULT_TAX_RATE = 10 # æ¢å®ã®çšç(ããŒã»ã³ããŒãžå€) LOWER_TAX_RATE = 5 # äœãæ¹ã®çšç(ããŒã»ã³ããŒãžå€) RETRYABLE_ERRORS = ( 'TransactionConflictException', 'ConditionalCheckFailedException', 'ProvisionedThroughputExceededException', 'ThrottlingException', 'ServiceUnavailableException', 'InternalServerErrorException' ) MAX_RETRIES = 3 RETRY_DELAY = 0.1 # ç§ def send_to_error_queue(error_message, is_retryable, transaction_id): queue_url = 'TransientErrorQueue' if is_retryable else 'NonTransientErrorQueue' message_body = { 'error_message': error_message, 'transaction_id': transaction_id } try: sqs.send_message( QueueUrl=queue_url, MessageBody=json.dumps(message_body) ) except Exception as e: print(f"Failed to send message to {queue_url}: {str(e)}") def process_transaction(tin, amount, transaction_id): for attempt in range(MAX_RETRIES + 1): try: response = dynamodb.get_item(TableName='CumulativeTransactionStore', Key={'cumulativeStore_primary_key': {'S': tin}}) item = response.get('Item') if not item: print("Record not found.") return cumulative_amount_consumed = int(item.get('cumulative_amount_consumed', {}).get('N', '0')) threshold_value = int(item.get('threshold_value', {}).get('N', '0')) current_amount = amount if (cumulative_amount_consumed + current_amount < threshold_value): update_expression = 'SET cumulative_amount_consumed = cumulative_amount_consumed + :val, tax_rate = :tax_rate' tax_rate = DEFAULT_TAX_RATE max_value = threshold_value min_value = 0 else: update_expression = 'SET cumulative_amount_consumed = cumulative_amount_consumed + :val, tax_rate = :tax_rate' tax_rate = LOWER_TAX_RATE max_value = sys.maxsize min_value = threshold_value expression_attribute_values = { ':val': {'N': str(current_amount)}, ':tax_rate': {'N': str(tax_rate)}, ':lo': {'N': str(min_value)}, ':hi': {'N': str(max_value)} } dynamodb.transact_write_items( TransactItems=[ { 'Update': { 'TableName': 'CumulativeTransactionStore', 'Key': {'cumulativeStore_primary_key': {'S': tin}}, 'UpdateExpression': update_expression, 'ConditionExpression': 'cumulative_amount_consumed < :hi AND cumulative_amount_consumed >= :lo', 'ExpressionAttributeValues': expression_attribute_values, } }, { 'Put': { 'TableName': 'TaxDeductionAuditStore', 'Item': { 'transactionID': {'S': transaction_id}, 'transaction_amount': {'N': str(amount)}, 'transaction_tax_amount': {'N': str(amount * tax_rate / 100)} } } } ], ClientRequestToken=transaction_id ) print(f"Transaction processed successfully on attempt {attempt + 1}") return # Success, exit the function except Exception as e: error_code = e.response['Error']['Code'] error_message = f"Error accessing DynamoDB: {error_code} - {e.response['Error']['Message']}" is_retryable = error_code in RETRYABLE_ERRORS if is_retryable and attempt < MAX_RETRIES: print(f"Retryable error occurred on attempt {attempt + 1}. Retrying...") time.sleep(RETRY_DELAY * (2 ** attempt)) # Exponential backoff else: send_to_error_queue(error_message, is_retryable, transaction_id) # If we've exhausted all retries error_message = f"Max retries ({MAX_RETRIES}) exceeded. Last error: {error_message}" send_to_error_queue(error_message, True, transaction_id) # Main execution try: process_transaction(SAMPLE_TIN, SAMPLE_AMOUNT, SAMPLE_TRANSACTION_ID) except Exception as e: print(f"Transaction processing failed: {str(e)}") çµæ ã·ã¹ãã ã®ããã©ãŒãã³ã¹è©äŸ¡ã§ã¯ãå®è¡æéã 30 ç§ã«åºå®ããã¹ã¬ããæ°ãå€ããªããäžé£ã®ãã¹ãã宿œããŸããã åå®è¡åŸã«çޝç©ãã©ã³ã¶ã¯ã·ã§ã³ã¹ãã¢ããŒãã«ãªã»ããããããšã§ãããŸããŸãªè² è·æ¡ä»¶äžã§ã®ã·ã¹ãã ã®åäœãå
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§ããŠãã ããã { "Version": "2012-10-17", "Statement": [ { "Sid": "AthenaExecution", "Action": [ "athena:StartQueryExecution", "athena:GetQueryExecution", "athena:GetQueryResults" ], "Effect": "Allow", "Resource": "arn:aws:athena:<AWS_Region>:<AWS_account_ID_number>:workgroup/<workgroup_id>" } ] } AWS Lambda ãµãŒãã¹çšã® IAM ããŒã«ãäœæãã smus_consumer_lambda ãšããååãä»ããŸããAWS ãããŒãžãã¢ã¯ã»ã¹èš±å¯ AWSLambdaBasicExecutionRole ãšãäœæããã°ããã® smus_consumer_athena_execution ãšããååã®ã¢ã¯ã»ã¹èš±å¯ãå²ãåœãŠãŸããæé ã«ã€ããŠã¯ãã AWS ãµãŒãã¹ã«ã¢ã¯ã»ã¹èš±å¯ãå§ä»»ããããŒã«ã®äœæ ããåç
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¥åããŸãã Runtime ã§ Python 3.14 ãéžæããŸãã Change default execution role ã»ã¯ã·ã§ã³ãå±éããŸãã Execution role ã§ Use an existing role ãéžæããŸãã Existing role ã§ smus_consumer_lambda ãéžæããŸãã Create function ãéžæããŸãã Code ã¿ãã® Code source ã§ãæ¢åã®ã³ãŒããæ¬¡ã®ã³ãŒãã«çœ®ãæããŸãã import boto3 import time sts_client = boto3.client('sts') role_arn = "<role_arn>" session_name = "AthenaQuerySession" catalog = "AwsDataCatalog" database = "<database_name>" workgroup = "<workgroup_id>" query = "select * from "+catalog+"."+database+".trees" def lambda_handler(event, context): # Assume SageMaker Unified Studio project role assumed_role_object = sts_client.assume_role( RoleArn=role_arn, RoleSessionName=session_name ) # Get temporary credentials credentials = assumed_role_object['Credentials'] # Create Athena client using temporary credentials athena = boto3.client( 'athena', aws_access_key_id=credentials['AccessKeyId'], aws_secret_access_key=credentials['SecretAccessKey'], aws_session_token=credentials['SessionToken'], region_name='eu-west-1' ) # Execute Athena Query response = athena.start_query_execution( QueryString=query, QueryExecutionContext={ 'Database': database, 'Catalog': catalog }, WorkGroup=workgroup ) query_execution_id = response['QueryExecutionId'] # Polling with exponential backoff wait_time = 0.25 # Start with 0.25 seconds max_wait = 8 # Maximum wait time of 8 seconds while True: result = athena.get_query_execution(QueryExecutionId=query_execution_id) state = result['QueryExecution']['Status']['State'] if state in ['FAILED', 'CANCELLED']: raise Exception(f"Query {state}") elif state == 'SUCCEEDED': break elif state in ['QUEUED', 'RUNNING']: time.sleep(wait_time) wait_time = min(wait_time * 2, max_wait) # Double wait time, cap at max_wait # Retrieve results results = athena.get_query_results(QueryExecutionId=query_execution_id) return results Deploy ãéžæããŸãã Lambda 颿°ã«æäŸãããã³ãŒãã«ã¯ãåŸã§å¿
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