BackgroundJobs 完成后停止作业
我过去使用过Delayed_job。我有一个在服务器上运行的旧项目，我无法从 Ruby 1.8.6 升级到 1.8.7，因此无法使用延迟作业，所以我正在尝试 BackgroundJobs http://codeforpeople.rubyforge.org/svn/bj/trunk/README
我让它工作，以便我的工作运行，但有些事情似乎不太对劲。例如，如果我像这样运行作业：
jobs = Bj.submit "echo hi", :is_restartable => false, :limit => 1, :forever => false
然后我会在 bj_job 表中看到该作业，并且在标准输出中看到它与“hi”一起完成。我还看到表中只有一项作业，并且它不会继续重新运行它。
出于某种原因，如果我这样做：
jobs = Bj.submit "./script/runner ./jobs/calculate_mean_values.rb #{self.id}", :is_restartable => false, :limit => 1, :forever => false
作业仍然按预期完成，但是，它不断在 bj_job 表中插入新行，并且该方法会一遍又一遍地运行，直到我停止我的开发服务器。这是它应该如何工作的吗？
我正在使用 Ruby 1.8.6 和 Rails 2.1.2，但没有升级选项。我正在使用 Bj 的插件风格。
因为我只需要在模型保存后运行一次该过程，所以我可以直接使用脚本/运行程序来使其工作，如下所示：
system " RAILS_ENV=#{RAILS_ENV} ruby #{RAILS_ROOT}/script/runner 'CompositeGrid.calculate_values(#{self.id})' & "
但想知道我在后台作业中是否做错了什么，
I've used Delayed_job in the past. I have an old project that runs on a server where I can't upgrade from Ruby 1.8.6 to 1.8.7, and therefore can't use Delayed Job, so I'm trying BackgroundJobs http://codeforpeople.rubyforge.org/svn/bj/trunk/README
I have it working so that my job runs, but something doesn't seem right. For example, if I run the job like this:
jobs = Bj.submit "echo hi", :is_restartable => false, :limit => 1, :forever => false
Then I see the job in the bj_job table and I see that it completed along with 'hi' in stdout. I also see only one job in the table and it doesn't keep re-running it.
For some reason if I do this:
jobs = Bj.submit "./script/runner ./jobs/calculate_mean_values.rb #{self.id}", :is_restartable => false, :limit => 1, :forever => false
The job still completes as expected, however, it keeps inserting new rows in the bj_job table, and the method gets run over and over until I stop my dev server. Is that how it is supposed to work?
I'm using Ruby 1.8.6 and Rails 2.1.2 and I don't have the option of upgrading. I'm using the plugin flavor of Bj.
Because I just need to run the process once after the model is saved, I have it working by using script/runner directly like this:
system " RAILS_ENV=#{RAILS_ENV} ruby #{RAILS_ROOT}/script/runner 'CompositeGrid.calculate_values(#{self.id})' & "
But would like to know if I'm doing something wrong with Background Jobs,
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（1）
好吧，这是愚蠢的用户错误。事实证明，我收到了一个回调，该回调正在重新启动进程并创建无限循环。修复回调后，它完全按预期工作。
OK, this was stupid user error. As it turns out, I had a call back that was restarting the process and creating an endless loop. After fixing the call back it is working exactly as expected.