Google App Engine-如何部署持续运行的代码？

Question

Sorry for the poor title but I couldn't think how else to word it.

I've deployed an application to Google App Engine which uses servlets to service requests to my server's URI. The servlets are instantiated on-demand by the container but I haven't seen anything in the documentation about how to deploy code which just runs constantly in the background (ie the equivalent of a main method which runs upon deployment for lack of a better explanation) which can be referenced by the servlets. I'd appreciate it if anyone could point me in the right direction. Thanks

Answer 1

1. Deploy your code as a new version.
2. Spin up new instances.
3. Change the default version to the new one.
4. Shut down old instances.

It is your responsibility to make sure that your code shuts down gracefully.

Note that new and old instances still share Memcache/datastore, which you can use to pass any data that is necessary for seamless transition.