Resin2/3 如何更新class不重启?

resin2/resin3如何实现“更新class,服务不重启”这样的功能?

查阅一些资料得知,在Win平台,用 httpd.exe -XDebug 参数来启动 hot-swap 功能,是可以实现class自动重载,而服务不重启

但是在linux平台,httpd.sh 并没有 -Xdebug这个参数,附带参考文档中也没有任何关于hot-swap的说明

只有在官方网站上有这么一段
Class compilation
Resin provides a built-in build process that causes changes
to Java source files to be recognized and compiled
immediately, avoiding the overhead of the build step in the
code-build-test cycle. Hot swap features allow for changes
to class files to be immediately loaded into a running
application without requiring a restart of the server or the application being developed.

有没有对这个东西有研究的朋友可以说一说