Ole Green

25 papers A 1C 1Journal 20Unranked 3
YearRankTypeTitle / Venue / Authors
2022 J jnl
CoRR
Paraskevi Nousi, Emmanouil Mpampis, Nikolaos Passalis, Ole Green, Anastasios Tefas
2022 A conf
IROS
Nikolaos Passalis, S. Pedrazzi, Robert Babuska, Wolfram Burgard, D. Dias, F. Ferro, Moncef Gabbouj, Ole Green, Alexandros Iosifidis, Erdal Kayacan, Jens Kober, O. Michel, Nikos Nikolaidis, Paraskevi Nousi, Roel Pieters, Maria Tzelepi, Abhinav Valada, Anastasios Tefas
2022 J jnl
CoRR
Nikolaos Passalis, S. Pedrazzi, Robert Babuska, Wolfram Burgard, D. Dias, F. Ferro, Moncef Gabbouj, Ole Green, Alexandros Iosifidis, Erdal Kayacan, Jens Kober, O. Michel, Nikolaos Nikolaidis, Paraskevi Nousi, Roel Pieters, Maria Tzelepi, Abhinav Valada, Anastasios Tefas
2019 J jnl
Sensors
Frederik F. Foldager, Johanna Maria Pedersen, Esben Haubro Skov, Alevtina Evgrafova, Ole Green
2018 J jnl
Comput. Electron. Agric.
Henrik Skov Midtiby, Kim Arild Steen, Ole Green
2018 J jnl
Comput. Electron. Agric.
Søren Kirkegaard Nielsen, Lars J. Munkholm, Mathieu Lamandé, Michael Nørremark, Gareth T. C. Edwards, Ole Green
2017 conf
SEFM Workshops
Frederik F. Foldager, Peter Gorm Larsen, Ole Green
2017 J jnl
Sensors
Søren Skovsen, Mads Dyrmann, Anders Krogh Mortensen, Kim Arild Steen, Ole Green, Jørgen Eriksen, René Gislum, Rasmus Nyholm Jørgensen, Henrik Karstoft
2017 J jnl
CoRR
Mikkel Kragh Hansen, Peter Christiansen, Morten Stigaard Laursen, Morten Larsen, Kim Arild Steen, Ole Green, Henrik Karstoft, Rasmus Nyholm Jørgensen
2017 J jnl
Sensors
Mikkel Kragh Hansen, Peter Christiansen, Morten Stigaard Laursen, Morten Larsen, Kim Arild Steen, Ole Green, Henrik Karstoft, Rasmus Nyholm Jørgensen
2017 J jnl
Comput. Electron. Agric.
Søren Kirkegaard Nielsen, Lars J. Munkholm, Mathieu Lamandé, Michael Nørremark, Nick Skou-Nielsen, Gareth T. C. Edwards, Ole Green
2016 conf
SENSORNETS
Jakob Pilegaard Juul, Ole Green, Rune Hylsberg Jacobsen
2016 conf
CPS Data
Peter Gorm Larsen, John S. Fitzgerald, Jim Woodcock, Peter Fritzson, Jörg Brauer, Christian Kleijn, Thierry Lecomte, Markus Pfeil, Ole Green, Stylianos Basagiannis, Andrey Sadovykh
2016 J jnl
Comput. Electron. Agric.
Søren Kirkegaard Nielsen, Michael Nørremark, Ole Green
2015 J jnl
Wirel. Pers. Commun.
Jakob Pilegaard Juul, Ole Green, Rune Hylsberg Jacobsen
2015 J jnl
Sensors
Kim Arild Steen, Ole Roland Therkildsen, Ole Green, Henrik Karstoft
2015 C conf
ICVS
Thomas Jensen, Lars J. Munkholm, Ole Green, Henrik Karstoft
2013 J jnl
Int. J. Pattern Recognit. Artif. Intell.
Kim Arild Steen, Ole Roland Therkildsen, Ole Green, Henrik Karstoft
2012 J jnl
Decis. Support Syst.
Dionysis D. Bochtis, Claus G. Sørensen, Ole Green
2012 J jnl
Sensors
Kim Arild Steen, Ole Roland Therkildsen, Henrik Karstoft, Ole Green
2012 J jnl
Sensors
Kim Arild Steen, Andrés Villa-Henriksen, Ole Roland Therkildsen, Ole Green
2011 J jnl
Sensors
Dionysis D. Bochtis, Claus G. Sørensen, Ole Green, Thomas Bartzanas
2011 J jnl
Sensors
Mette Marie Løkke, Helene Fast Seefeldt, Gareth T. C. Edwards, Ole Green
2011 J jnl
Sensors
Jakob Juul Larsen, Ole Green, Esmaeil S. Nadimi, Thomas Skjødeberg Toftegaard
2010 J jnl
Sensors
Vicent Gasso-Tortajada, Alastair J. Ward, Hasib Mansur, Torben Brøchner, Claus G. Sørensen, Ole Green
s3-storage/s3_test.py
← Index s3-storage/s3_test.py python
#!/usr/bin/env python3
"""
Simple script to test S3 connectivity and download.
Usage: python s3_test.py
"""

import os
import time
import tempfile
from minio import Minio
from minio.error import S3Error
from dotenv import load_dotenv

# Load environment variables
load_dotenv()

def get_minio_client():
    """Create and return a Minio client using credentials from .env file"""
    endpoint = os.getenv("S3_ENDPOINT")
    access_key = os.getenv("S3_ACCESS_KEY")
    secret_key = os.getenv("S3_SECRET_KEY")
    secure = True 
    
    print(f"Connecting to S3 endpoint: {endpoint} (secure={secure})")
    
    return Minio(
        endpoint=endpoint,
        access_key=access_key,
        secret_key=secret_key,
        secure=secure
    )

def test_connection():
    """Test basic connectivity to S3"""
    try:
        client = get_minio_client()
        
        # Try to list buckets as a basic connectivity test
        buckets = client.list_buckets()
        print(f"Successfully connected to S3. Found {len(buckets)} buckets:")
        for bucket in buckets:
            print(f"  - {bucket.name}")
        
        return client
    except Exception as e:
        print(f"Failed to connect to S3: {e}")
        return None

def test_bucket_access(client, bucket_name):
    """Test access to a specific bucket"""
    try:
        exists = client.bucket_exists(bucket_name)
        if exists:
            print(f"Bucket '{bucket_name}' exists and is accessible")
            
            # List a few objects to verify access
            count = 0
            objects = []
            for obj in client.list_objects(bucket_name, recursive=True):
                print(f"  - {obj.object_name} ({obj.size} bytes)")
                objects.append(obj)
                count += 1
                if count >= 5:
                    break
            
            print(f"Found at least {len(objects)} objects in bucket")
            return objects
        else:
            print(f"Bucket '{bucket_name}' does not exist or is not accessible")
            return []
    except Exception as e:
        print(f"Error accessing bucket '{bucket_name}': {e}")
        return []

def test_download(client, bucket_name, object_name):
    """Test downloading a specific object"""
    try:
        print(f"Attempting to download: {object_name}")
        start_time = time.time()
        
        # Create a temporary file to store the downloaded object
        with tempfile.NamedTemporaryFile(delete=False) as temp_file:
            temp_path = temp_file.name
        
        # Download the object
        client.fget_object(bucket_name, object_name, temp_path)
        
        # Check if the file was downloaded successfully
        file_size = os.path.getsize(temp_path)
        elapsed_time = time.time() - start_time
        
        print(f"Download successful: {file_size} bytes in {elapsed_time:.2f} seconds")
        print(f"Average download speed: {file_size/elapsed_time/1024:.2f} KB/s")
        
        # Clean up
        os.unlink(temp_path)
        return True
    except S3Error as e:
        print(f"S3 Error during download: {e}")
        return False
    except Exception as e:
        print(f"Error downloading object: {e}")
        return False

def main():
    """Main function to run all tests"""
    print("=== S3 Connectivity Test ===")
    
    # Test basic connectivity
    client = test_connection()
    if not client:
        return
    
    # Get bucket name from environment variable
    bucket_name = "redb"
    print(f"\n=== Testing Access to Bucket: {bucket_name} ===")
    objects = test_bucket_access(client, bucket_name)
    
    if objects:
        # Test downloading the first object
        first_object = objects[0].object_name
        print(f"\n=== Testing Download of Object: {first_object} ===")
        test_download(client, bucket_name, first_object)
        
        # If the first one worked, let's try a specific file from the error log
        print(f"\n=== Testing Download of Specific Object ===")
        specific_object = "00/06/00062073114defac39cb7ab9cb99a0b77c535a09a241c60d47ddd0b6431629f1.zip"
        test_download(client, bucket_name, specific_object)

if __name__ == "__main__":
    main()