public function testCircuitOpens()
{
$stub = $this->getMockBuilder('FakeCircuit')->setMethods(['foo'])->getMock();
$stub->method('foo')->will($this->throwException(new \Exception()));
$cb = new SimpleCircuitBreaker($stub);
for ($i = 0; $i < 10; $i++) {
try {
$cb->foo();
} catch (\Exception $e) {
}
}
// successful method call should fail with Circuit Open
$stub->method('foo')->willReturn('bar');
$this->expectException(CircuitBreakerOpenException::class);
$cb->foo();
}
use Rho\Transport\HttpJsonTransport;
use Rho\CircuitBreaker\SimpleCircuitBreaker;
use Rho\Retrier;
use Rho\RateLimiter\SimpleRateLimiter;
use Rho\Metrics;
use Rho\BlackHole;
function showException($e)
{
echo $e->getMessage() . "\n";
}
$client = new HttpJsonTransport("http://api.coindesk.com");
$client = Metrics::wrap($client, ['collector' => new BlackHole(), 'name' => 'bitcoin']);
// in production, use a DataDoggyDog or statsd client instead of BlackHole
$client = SimpleRateLimiter::wrap($client, ['limits' => [5 => 2]]);
// limit to 2 requests every 5s
$client = SimpleCircuitBreaker::wrap($client, ['failThreshold' => 3, 'resetTime' => 10]);
// allow only 3 fails every 10s
$client = Retrier::wrap($client, ['retries' => 10, 'delay' => 1.0]);
// retry up to 10 times, delaying 1s each
try {
$resp = $client->rpc(['GET', '/v1/bpi/currentprice/USD.json'], [], ['timeout' => 3, 'connect_timeout' => 3]);
if (!$resp->isError()) {
$data = $resp->getResult();
echo money_format("Current Bitcoin price in USD is \$%i\n", $data['bpi']['USD']['rate']);
} else {
echo "API Server error\n";
}
} catch (Rho\Exception\CircuitBreakerOpenException $e) {
showException($e);
} catch (Rho\Exception\TooManyRetriesException $e) {
showException($e);