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amp/examples/promises/onresolve.php

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#!/usr/bin/env php
<?php
use Amp\Deferred;
use Amp\Loop;
require_once __DIR__ . "/../../vendor/autoload.php";
/**
* @return \Amp\Promise<string>
*/
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function jobSuccess()
{
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$deferred = new Deferred();
// We delay Promise resolve for 1 sec to simulate some async job.
Loop::delay(1 * 1000, function () use ($deferred) {
$deferred->resolve("value");
});
return $deferred->promise();
}
/**
* @return \Amp\Promise<string>
*/
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function jobFail()
{
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$deferred = new Deferred();
// We delay Promise fail for 2 sec to simulate some async job.
Loop::delay(2 * 1000, function () use ($deferred) {
$deferred->fail(new Exception("force fail"));
});
return $deferred->promise();
}
// onResolve() shouldn't be used directly in 99% of all cases.
// Check https://github.com/amphp/amp/issues/178#issuecomment-342460585
// Check deferred.php for a cleaner code syntax.
Loop::run(function () {
jobSuccess()->onResolve(function (Throwable $error = null, $result = null) {
if ($error) {
echo "asyncOperation1 fail -> " . $error->getMessage() . PHP_EOL;
} else {
echo "asyncOperation1 result -> " . $result . PHP_EOL;
}
jobFail()->onResolve(function (Throwable $error = null, $result = null) {
if ($error) {
echo "asyncOperation2 fail -> " . $error->getMessage() . PHP_EOL;
} else {
echo "asyncOperation2 result -> " . $result . PHP_EOL;
}
});
});
});