import logging

import threading

import queue

import time

import random

class LogStreamSynchronizer:

def __init__(self, log_streams, validation_checks, sync_interval=1):

self.log_streams = log_streams

self.validation_checks = validation_checks

self.sync_interval = sync_interval

self.queue = queue.Queue()

self.stop_event = threading.Event()

self.threads = []

def _validate_log_stream(self, log_stream):

try:

for check in self.validation_checks:

result = check(log_stream)

if not result:

print(f"Validation check failed for {log_stream}")

return False

return True

except Exception as e:

print(f"Error during validation for {log_stream}: {e}")

return False

def _sync_log_stream(self, log_stream):

try:

# Simulate fetching data from log stream

data = log_stream.get_data()

if data is None:

print(f"Log stream {log_stream} is empty.")

return False

if self._validate_log_stream(data):

print(f"Log stream {log_stream} validated successfully.")

return True

else:

print(f"Log stream {log_stream} validation failed.")

return False

except Exception as e:

print(f"Error syncing log stream {log_stream}: {e}")

return False

def _worker(self):

while not self.stop_event.is_set():

try:

log_stream = self.queue.get(timeout=self.sync_interval)

self._sync_log_stream(log_stream)

self.queue.task_done()

except queue.Empty:

pass

time.sleep(self.sync_interval)

def start(self):

for stream in self.log_streams:

self.queue.put(stream)

num_threads = len(self.log_streams) # Or a reasonable number

for _ in range(num_threads):

thread = threading.Thread(target=self._worker)

thread.daemon = True # Allow main thread to exit even if workers are running

self.threads.append(thread)

thread.start()

def stop(self):

self.stop_event.set()

for thread in self.threads:

thread.join()

if __name__ == '__main__':

class MockLogStream:

def __init__(self, name, data=None):

self.name = name

self.data = data

def get_data(self):

return self.data

def check_data_not_empty(data):

return data is not None and len(data) > 0

def check_data_contains_keyword(data):

return "important" in data

log_streams = [

MockLogStream("stream_1", "This is some log data."),

MockLogStream("stream_2", None),

MockLogStream("stream_3", "Another log entry.")

]

validation_checks = [check_data_not_empty, check_data_contains_keyword]

sync_system = LogStreamSynchronizer(log_streams, validation_checks, sync_interval=2)

sync_system.start()

time.sleep(10)

sync_system.stop()

print("Synchronization stopped.")