Modules In Process Execution

• libexec/loader (wrapper): executes Bootstrap() runction. libexec/distribute et.al. is a symlink(2) to this loader. See under /usr/local/libexec/fml/ path.

• • reads /usr/local/etc/fml/main.cf and resolves $fml_version. reset @INC by main.cf value. Since default_config.cf is version dependent, the loader should evaluate the file before it reads ML specific configuration files.

  • Evaluate @ARGV and resolves which ML specific configuration files we need to load.

  • load FML::Process::Switch class which is also version dependent.

    • The loader executes Bootstrap2() and ProcessSwitch() to switch the context to each one such as distribution, command mail et.al. In this time, the loader knows the role from $0 process name.

    • Exapmle of Polymorphyism: dynamic binding of module and creation of process object in starting the process. FML::Process::Flow describes the flow of process like this:

      $process = new FML::Process::SOMETHING;
      $process->prepare($args);
      $process->verify_request($args);
      $process->run($args);
      $process->finish($args);

      Each process should probide proper methods under FML::Process:: class.