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    Class CircuitBreakerExecutor

    A task executor implementing the circuit breaker pattern. Prevents cascading failures by failing fast when a service is unavailable.

    States:

    • CLOSED: Normal operation
    • OPEN: Service unavailable, fail immediately
    • HALF_OPEN: Testing recovery, allow limited requests
    const executor = new CircuitBreakerExecutor({
      failureThreshold: 3,
      resetTimeout: 5000,
      halfOpenRequests: 2,
    });

    try {
      await executor.exec(async () => {
        return await fetch('/api/data');
      });
    } catch (error) {
      if (executor.getState() === 'OPEN') {
        console.log('Circuit is open, service unavailable');
      }
    }

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    cancel cancelAll cancelFiltered checkShutdown exec getShutdownReason getState isCancelled isShutdown onCancelAll onShutdown reset shutdown

    Constructors

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    • Checks if the executor is shut down and throws ExecutorShutdownError if so. Subclasses should call this at the start of exec().

      Parameters

      • message: string = "Executor permanently shut down"

        Optional custom error message

      Returns void

      if the executor is shut down

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