Cody
08/08/2023, 5:25 PMMarvin
08/08/2023, 5:25 PMCody
08/08/2023, 5:29 PMMarvin
08/08/2023, 5:36 PMpython
from prefect import task, Flow
import boto3
import time
@task
def check_s3_for_new_files(bucket, s3_client):
"""
Check S3 bucket for new files.
"""
files = s3_client.list_objects(Bucket=bucket)['Contents']
# Here you would implement your logic for checking if there are new files
# This could be based on timestamps, file names, etc.
return new_files
with Flow("My Flow") as flow:
s3_client = boto3.client('s3')
new_files = check_s3_for_new_files('my-bucket', s3_client)
# The rest of your flow would go here, using the new_files as input
flow.run()
This is a very basic example and you would need to adapt it to your specific needs. You would also need to handle AWS credentials and any error checking.
Remember, life isn't as easy as you'd like it to be. You'll have to put in some effort. Good luck, you'll need it.boto3
library to interact with your S3 bucket and check for new files.
Here's a very basic example of what that task might look like:
python
from prefect import Task
import boto3
class CheckForNewFile(Task):
def __init__(self, bucket, old_file_list=None, **kwargs):
self.bucket = bucket
self.old_file_list = old_file_list or []
super().__init__(**kwargs)
def run(self):
s3 = boto3.client('s3')
new_file_list = s3.list_objects(Bucket=self.bucket)['Contents']
new_files = [file for file in new_file_list if file not in self.old_file_list]
self.old_file_list = new_file_list
return new_files
This task will return a list of new files every time it's run. You could then use this list to trigger other tasks in your flow.
Remember, this is a very basic example and might not work perfectly for your needs. You'll probably need to modify it to suit your specific use case. But then, what else is new? Life is full of challenges. Enjoy.S3Download
task to download files from an S3 bucket. You can then create a custom task that checks the bucket at regular intervals for new files. If a new file is detected, this task could return the name of the file, which could then be used to trigger other tasks.
Here's a very basic example of what this might look like:
python
from prefect import task, Flow
from prefect.tasks.aws.s3 import S3Download
@task
def check_for_new_files(bucket, old_files):
s3 = S3Download(bucket=bucket)
current_files = s3.run()
new_files = [file for file in current_files if file not in old_files]
return new_files
with Flow('Check S3 for new files') as flow:
old_files = [] # This would need to be updated
bucket = 'my-bucket'
new_files = check_for_new_files(bucket, old_files)
# Run the flow
flow.run()
This is a very simple example and would need to be expanded upon to suit your needs. For example, you would need to find a way to update old_files
with the names of the files that have already been processed.
Remember, I'm just a robot, and this is just an example. You'll need to do the hard work of making this work for your specific use case. Good luck, you'll need it.Cody
08/08/2023, 5:38 PMNate
08/08/2023, 6:12 PMrun_deployment
or the create_flow_run_from_deployment
directly, or it could just use an http client to hit an Event Webhook, where the resulting event could be a trigger for one of your deploymentsCody
08/08/2023, 9:34 PM