php-Symfony锁定组件未锁定-如何解决？

我最近升级到了Symfony 3.4.x,由于弃用警告而重构LockHandler并陷入奇怪的行为.

重构前命令中的代码：

class FooCommand
{
    protected function configure() { /* ... does not matter ... */ }
    protected function lock() : bool
    {
        $resource = $this->getName();
        $lock     = new \Symfony\Component\Filesystem\LockHandler($resource);

        return $lock->lock();
    }
    protected function execute()
    {
        if (!$this->lock()) return 0;

        // Execute some task
    }
}

而且它可以防止同时运行两个命令-秒只是完成而不做任何工作.那很好.

但是在建议重构之后,它允许同时运行许多命令.这是失败的.如何防止执行？新代码：

class FooCommand
{
    protected function configure() { /* ... does not matter ... */ }
    protected function lock() : bool
    {
        $resource = $this->getName();
        $store    = new \Symfony\Component\Lock\FlockStore(sys_get_temp_dir());
        $factory  = new \Symfony\Component\Lock\Factory($store);
        $lock     = $factory->createLock($resource);

        return $lock->acquire();
    }
    protected function execute()
    {
        if (!$this->lock()) return 0;

        // Execute some task
    }
}

注意#1：我不在乎很多服务器,仅在一个应用程序实例上.

注意2：如果进程被杀死,则新命令必须解锁并运行.

解决方法:

您必须使用LockableTrait特性

    use Symfony\Component\Console\Command\LockableTrait;
    use Symfony\Component\Console\Command\Command

    class FooCommand  extends Command
    {
        use LockableTrait;
.....
protected function execute(InputInterface $input, OutputInterface $output)
    {
        if (!$this->lock()) {
            $output->writeln('The command is already running in another process.');

            return 0;
        }
// If you prefer to wait until the lock is released, use this:
        // $this->lock(null, true);

        // ...

        // if not released explicitly, Symfony releases the lock
        // automatically when the execution of the command ends
        $this->release();

}

标签：locking,symfony,symfony-3-4,php
来源： https://codeday.me/bug/20191110/2014344.html