/**
* Whether the circuit is open
*
* @return boolean
*/
public function isOpen()
{
if ($this->stateStorage->isCircuitOpen($this->commandKey)) {
// if we're open we immediately return true and don't bother attempting to 'close' ourself
// as that is left to allowSingleTest and a subsequent successful test to close
return true;
}
$healthCounts = $this->metrics->getHealthCounts();
if ($healthCounts->getTotal() < $this->config->get('circuitBreaker')->get('requestVolumeThreshold')) {
// we are not past the minimum volume threshold for the statistical window
// so we'll return false immediately and not calculate anything
return false;
}
$allowedErrorPercentage = $this->config->get('circuitBreaker')->get('errorThresholdPercentage');
if ($healthCounts->getErrorPercentage() < $allowedErrorPercentage) {
return false;
} else {
$this->stateStorage->openCircuit($this->commandKey, $this->config->get('circuitBreaker')->get('sleepWindowInMilliseconds'));
return true;
}
}
public function testGetHealthCountsExpiringSnapshot()
{
$now = \Odesk\Phystrix\microtime() * 1000;
// current time in milliseconds
// a snapshot created two seconds ago is no longer valid and we expect a new one
$snapshot = new HealthCountsSnapshot($now - 2000, 11, 22);
// setting it as the last snapshot into metrics
$reflection = new \ReflectionClass('Odesk\\Phystrix\\CommandMetrics');
$property = $reflection->getProperty('lastSnapshot');
$property->setAccessible(true);
$property->setValue($this->metrics, $snapshot);
$this->counter->expects($this->exactly(2))->method('get')->will($this->returnValueMap(array(array(MetricsCounter::FAILURE, 22), array(MetricsCounter::SUCCESS, 33))));
$newSnapshot = $this->metrics->getHealthCounts();
$this->assertNotEquals($snapshot, $newSnapshot);
$this->assertEquals(33, $newSnapshot->getSuccessful());
}
