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<?php
/**
* Copyright 2017 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace Google\Cloud\Core\Testing\System;
use Google\ApiCore\ApiException;
use Google\Cloud\Core\Exception\NotFoundException;
use Google\Cloud\Core\ExponentialBackoff;
/**
* Manage a queue of items to be cleaned up at the end of the test run.
*
* @experimental
* @internal
*/
class DeletionQueue
{
/**
* @var callable[]
*/
private $queue = [];
/**
* @var bool
*/
private $acceptAllInputs;
/**
* @param bool $acceptAllInputs If false, only callables or objects with
* `delete` methods are allowed. **Defaults to** `false`.
*
* @experimental
* @internal
*/
public function __construct($acceptAllInputs = false)
{
$this->acceptAllInputs = $acceptAllInputs;
}
/**
* Add an item to be cleaned up.
*
* @param mixed $toDelete Unless the class was created with
* `$acceptAllInputs = true`, either a callable with no arguments, or
* an object with a `delete` method.
* @return void
*
* @experimental
* @internal
*/
public function add($toDelete)
{
if (!$this->acceptAllInputs) {
if (!is_callable($toDelete) && !method_exists($toDelete, 'delete')) {
throw new \BadMethodCallException(
'Deletion Queue requires a callable, or an object with a `delete` method.'
);
}
if (!is_callable($toDelete)) {
$toDelete = function () use ($toDelete) {
$toDelete->delete();
};
}
}
$this->queue[] = $toDelete;
}
/**
* Process all items in the deletion queue.
*
* @return void
* @throws ApiException
*
* @experimental
* @internal
*/
public function process(callable $action = null)
{
if ($action) {
$action($this->queue);
} else {
$backoff = new ExponentialBackoff(8);
foreach ($this->queue as $item) {
$backoff->execute(function () use ($item) {
try {
call_user_func($item);
} catch (NotFoundException $e) {
} catch (ApiException $apiException) {
if ($apiException->getStatus() !== 'NOT_FOUND') {
throw $apiException;
}
}
});
}
}
}
}
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