Real-time Log Analyzer

Algorithms Streaming Real Time

You are tasked with implementing a system that monitors a continuous stream of log entries. Each log entry contains a timestamp (in seconds) and a log level (e.g., INFO, WARN, ERROR, DEBUG). Your goal is to process these entries in real-time and support the following operation:

  • Given a time window of the last N seconds, return the count of log entries that have the level ERROR.

Requirements:

  1. Design a function or class that accepts new log entries as they arrive.
  2. Implement a query feature that, when provided with a window length (N seconds), returns the total number of ERROR-level logs within the most recent N seconds.
  3. Consider the efficiency of your solution, as new logs can arrive rapidly and queries could be executed frequently.
  4. Ensure that your solution handles edge cases (such as queries when no logs have been received, or when a time window exceeds the range of available data).

Your task is to implement this system. The input format and implementation details (such as the actual log stream simulation) are up to you. Write clean, well-documented code that demonstrates your approach.