import time
from pymongo import MongoClient

client = MongoClient('localhost',
                     18890,
                     username='your_user_name',
                     password='your_password',
                     authSource='events')
db = client.events

hour_in_milliseconds = 3600000

print('Database: ', db.name)

try:
    collection = db.eventLog
    print('Collection: ', collection)
    num = collection.find().count()
    now = time.time()
    cut_off = int(round(now * 1000)) - (5 * hour_in_milliseconds)
    query = {'$or': [
                     {'resource_Node': 'SolidityNode'},
                     {'block_timestamp': {'$lt': cut_off}}
                     ]}
    if int(num) >= 3000000:
        x = collection.delete_many(query)
        print(x.deleted_count, ' removed')
    else:
        print('ok ', num)

except Exception as e:
    print e