AWS Kinesis Firehose流写入数据到表时不会覆盖表的锁定状态。如果表被其他任务或操作锁定,Kinesis Firehose将等待表解锁后再进行写入。以下是一个Python示例,它展示了如何使用Amazon Kinesis Data Firehose API将数据写入S3,其中也包括了等待表解锁后再进行写入的代码:
import boto3
import time
firehose_client = boto3.client("firehose")
response = firehose_client.put_record(DeliveryStreamName="my-delivery-stream", Record={"Data": "Hello, World!"})
table_not_locked = False
while not table_not_locked:
try:
# 试图获取表的锁
dynamodb_table.update_item(
Key={"id": {"N": "1"}},
UpdateExpression="set #status =:s",
ExpressionAttributeNames={"#status": "status"},
ExpressionAttributeValues={":s": {"S": "locked"}},
)
# 成功获取锁
table_not_locked = True
except Exception as e:
# 表被锁定,休息5秒后重试
print("Table is locked, waiting for 5 seconds")
time.sleep(5)
firehose_client.put_record(DeliveryStreamName="my-delivery-stream", Record={"Data": "Hello again, World!"})
# 释放表锁
dynamodb_table.update_item(
Key={"id": {"N": "1"}},
UpdateExpression="set #status =:s",
ExpressionAttributeNames={"#status": "status"},
ExpressionAttributeValues={":s": {"S": "unlocked"}},
)