processor.py

import json
import logging
from functools import wraps

logger = logging.getLogger(__name__)

class JsonProcessor:
    def __init__(self, json_string):
        self.data = self.load_json(json_string)

    @staticmethod
    def load_json(json_string):
        try:
            return json.loads(json_string)
        except json.JSONDecodeError as e:
            logger.error('Failed to load JSON: %s', e)
            return {}

    def get_value(self, key, default=None):
        return self.data.get(key, default)

    def update_value(self, key, value):
        self.data[key] = value

    def to_json(self):
        return json.dumps(self.data, indent=4)

    def execute_with_retry(self, func, retries=3, *args, **kwargs):
        @wraps(func)
        def wrapper():
            for attempt in range(retries):
                try:
                    return func(*args, **kwargs)
                except Exception as e:
                    logger.warning('Attempt %d failed: %s', attempt + 1, e)
            logger.error('All attempts failed')
            return None
        return wrapper

# Example usage:
# processor = JsonProcessor('{"key": "value"}')
# print(processor.get_value('key'))
# processor.update_value('key', 'new_value')
# print(processor.to_json())