使用什么 CPAN 模块通过 Perl 进行非阻塞文件锁定

发布于 2024-10-03 22:50:33 字数 392 浏览 5 评论 0原文

我想确保一次只运行一个进程。所以我想确保 jobB 不会运行，除非 jobA 没有运行。

如果它能够重试锁定，那就太好了，这样我就不必编写代码了。大概是这样的：

LockFileModule->lock(
    lockfile           => '/fabulous/pants',
    retries            => 12,
    timeout            => 25,
    timebetweenretries => 30,
) or die "the other job is still running";

在 Perl 中执行此操作的最佳方法是什么？我希望有一个很好的 CPAN 模块来解决这个问题。

原文

I want to make sure only one process at a time runs. So I want to make sure jobB doesn't run unless jobA is not running.

It would be great if it had some ability to retry the lock so I don't have to code that. Something vaguely like this:

LockFileModule->lock(
    lockfile           => '/fabulous/pants',
    retries            => 12,
    timeout            => 25,
    timebetweenretries => 30,
) or die "the other job is still running";

Whats the best way to do this in Perl? I'm hoping there is a good CPAN module for this.

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意中人 2024-10-10 22:50:33

#!/usr/bin/perl
unless (flock(DATA, LOCK_EX|LOCK_NB)) {
    $logger->info("$0 is already running. Exiting.\n" );
    exit(1);
} else {
    $logger->info("$0 not already running, so starting instance now." );
}

__DATA__
Do not delete this. Used for flock code above

这将锁定程序本身的DATA部分。我使用这种技术，效果非常好。

您可以扩展它以非常轻松地启用重试。

#!/usr/bin/perl
unless (flock(DATA, LOCK_EX|LOCK_NB)) {
    $logger->info("$0 is already running. Exiting.\n" );
    exit(1);
} else {
    $logger->info("$0 not already running, so starting instance now." );
}

__DATA__
Do not delete this. Used for flock code above

This will lock the DATA section of the program itself. I use this technique, and it works very well.

You can expand it to enable retries pretty easily.

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