PHP code example of crowdstar / exponential-backoff

1. Go to this page and download the library: Download crowdstar/exponential-backoff library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

crowdstar / exponential-backoff example snippets



use CrowdStar\Backoff\EmptyValueCondition;
use CrowdStar\Backoff\ExponentialBackoff;

$result = (new ExponentialBackoff(new EmptyValueCondition()))->run(
    function () {
        return MyClass::fetchData();
    }
);



use CrowdStar\Backoff\ExceptionBasedCondition;
use CrowdStar\Backoff\ExponentialBackoff;

// Allow to catch multiple types of exceptions and throwable objects.
$backoff = new ExponentialBackoff(new ExceptionBasedCondition(Exception::class, Throwable::class));
try {
    $result = $backoff->run(
        function () {
            return MyClass::fetchData();
        }
    );
} catch (Throwable $t) {
    // Handle the errors here.
}



use CrowdStar\Backoff\AbstractRetryCondition;
use CrowdStar\Backoff\ExponentialBackoff;

$backoff = new ExponentialBackoff(
    new class extends AbstractRetryCondition {
        public function throwable(): bool
        {
            return false;
        }
        public function met($result, ?Exception $e): bool
        {
            return (empty($e) || (!($e instanceof Exception)));
        }
    }
);

$backoff->run(
    function () {
        return MyClass::fetchData();
    }
);



use CrowdStar\Backoff\AbstractRetryCondition;
use CrowdStar\Backoff\ExponentialBackoff;

$backoff = new ExponentialBackoff(
    new class extends AbstractRetryCondition {
        public function met($result, ?Exception $e): bool
        {
            return !empty($result);
        }
    }
);
$result = $backoff->run(
    function () {
        return MyClass::fetchData();
    }
);



use CrowdStar\Backoff\AbstractRetryCondition;
use CrowdStar\Backoff\EmptyValueCondition;
use CrowdStar\Backoff\ExceptionBasedCondition;
use CrowdStar\Backoff\ExponentialBackoff;

$backoff = new ExponentialBackoff(new EmptyValueCondition());
$backoff = new ExponentialBackoff(new ExceptionBasedCondition());
$backoff = new ExponentialBackoff(new ExceptionBasedCondition(Exception::class, Throwable::class));
$backoff = new ExponentialBackoff(
    new class extends AbstractRetryCondition {
        public function met($result, ?Exception $e): bool
        {
            return (empty($e) || (!($e instanceof Exception)));
        }
    }
);

$backoff
    ->setType(ExponentialBackoff::TYPE_SECONDS)
    ->setType(ExponentialBackoff::TYPE_MICROSECONDS)
    ->setMaxAttempts(3)
    ->setMaxAttempts(4);

$result = $backoff->run(
    function () {
        return MyClass::fetchData();
    }
);



$result = MyClass::fetchData();



use CrowdStar\Backoff\EmptyValueCondition;
use CrowdStar\Backoff\ExponentialBackoff;

$backoff = new ExponentialBackoff(new EmptyValueCondition());
$backoff->disable();
$result = $backoff->run(function () {return MyClass::fetchData();});



use CrowdStar\Backoff\ExponentialBackoff;
use CrowdStar\Backoff\NullCondition;

$result = (new ExponentialBackoff(new NullCondition()))
    ->setRetryCondition(new NullCondition()) // The method here is for demonstration purpose.
    ->run(function () {return MyClass::fetchData();});