CircuitBreaker.php

<?php

interface ICircuitBreakerStorage {
  
}

class CircuitBreaker {
  /**
   * StorageImplemntation should be a defined interface.
   **/
  public function __construct(ICircuitBreakerStorage $storageImplementation=null) {
    if ($storageImplementation==null) {
      // default engine
    }
  }
  
  /**
   * Check failure threshold, return a CircuitBreakerException if reached.
   * Otherwise catch exceptions and store them. Run anonymous functions.
   * 
   * Key identifies the service you're shielding. "Payment" could be an example.
   *
   **/
  public function run($key, Callable $callback) {
    
  }
}