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<?php
/**
* Copyright 2018 Google Inc. All Rights Reserved.
*
* 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\Batch;
/**
* A trait to assist in handling interrupt signals and gracefully stopping work.
*
* @experimental The experimental flag means that while we believe this method
* or class is ready for use, it may change before release in backwards-
* incompatible ways. Please use with caution, and test thoroughly when
* upgrading.
*/
trait InterruptTrait
{
private $shutdown = false;
private function setupSignalHandlers()
{
// setup signal handlers
pcntl_signal(SIGTERM, [$this, "sigHandler"]);
pcntl_signal(SIGINT, [$this, "sigHandler"]);
pcntl_signal(SIGHUP, [$this, "sigHandler"]);
pcntl_signal(SIGALRM, [$this, "sigHandler"]);
}
/**
* A signal handler for setting the terminate switch.
* {@see http://php.net/manual/en/function.pcntl-signal.php}
*
* @param int $signo The received signal.
* @param mixed $siginfo [optional] An array representing the signal
* information. **Defaults to** null.
*
* @return void
*/
public function sigHandler($signo, $siginfo = null)
{
switch ($signo) {
case SIGINT:
case SIGTERM:
$this->shutdown = true;
break;
}
}
}
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