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-From: William A. Rowe, Jr.
-Date: June 7th '00
-Subject: service monitoring in Apache 1.3.13
-
-The concept for a taskbar monitor has been thrown around
-for a very long while. 1.3.13 introduced Win9x services,
-and that added fuel to the mix. Here are some sideband
-observations I've made for other developers...
-
-About Apache as a console, don't start Apache hidden without
-any command line arguments if you want to launch it yourself
-in a hidden window (it will do the classic test for
-AllocConsole/FreeConsole)... drop in some arguments such as
-the -f or -r option and it will fly without thinking it is a
-service under 9x and NT.
-
-Rule two, don't use --ntservice as an argument, ever. Only
-the Windows NT Service Control Manager is allowed to pass that
-flag, and only that flag, when it runs Apache.exe. Do use
---ntservice as the sole argument to the executable name if
-you are installing an Apache NT service yourself.
-
-Rule three, use -k start and -n name when maintaining the
-HKLM/Software/Microsoft/Windows/CurrentVersion/RunServices
-list, since there is no other way for Apache to know what
-the service is named :) And look at any 9x installed service's
-RunServices entry in the registry for the start service semantic.
-
-Rule four, use the WinNT Service Control Manager exclusively
-for starting, stopping and restarting Apache as an NT service.
-The restart signal is the value 128, as documented in service.h
-and service.c - this will continue to work in Apache 2.0. If
-it fails, you are handling an older version (pre 1.3.13) of
-Apache, and need to stop and then start the service instead.
-
-Rule five, use the legacy pid-named events to signal Win9x
-service Apache to restart and stop the service. But don't
-bother looking for httpd.pid files... you can get the pid
-right from the hidden service control window. Apache 1.3.13
-and 2.x create a hidden window named for the name of the
-service (without the spaces), with a window class of
-"ApacheWin95ServiceMonitor", so can use FindWindow to track
-down running Win9x services. See the service.c code for how
-I accomplished this pretty simply in the -k stop/-k restart
-handler.
-
-Taskbar Monitor App
--------------------
-
-Basic requirements: a C code application using strictly the
-Win32 API, and not MFC or other Win32 frameworks. Could use
-the service.c module to share some basic functions. That
-module could be extended in Apache 2.0 to make this all easier.
-
-I think we are looking for an external app that simply acts
-as a monitor or allows a stopped service to be started. If
-the user logs off, we loose the monitor app, but installed as
-a shortcut in the Start group or in the registry key
-HKLM/Software/Microsoft/Windows/CurrentVersion/Run
-we will be just fine. I'd like to see the monitor run only
-one instance to monitor all running services, for memory
-and resource conservation.
-
-I was thinking that the hover/iconbar title would tell them
-"Test service is running", or "Test service is stopped".
-If they left click, they could stop or restart, or simply
-start if it is stopped. There could be a preference that
-each service doesn't get it's own individual task icon unless
-it is running, if it is a manual start service (or missing
-from the RunServices list, which is the equivilant under 9x).
-
-If a specific service is set to Auto start or is in the
-RunServices Win9x registry key, we must show them the stopped
-icon, of course. We might also keep the icon for any running
-service that stops abruptly. But there could be a 'single
-icon' option for the taskbar icon monitor that says show only
-a single status icon, for simplicity if the administrator runs
-many Apache services.
-
-But I was hoping that any right click would provide a menu
-of all Apache services with their status. e.g.
- Test service is stopped
- Apache_2 service is running
- MyWeb service is running
-and each would do the logical submenu, same as if that
-specific taskbar icon were left clicked, offering to start or
-offering to stop or restart the server, as appropriate.
-
-Finally, to identify all installed Apache services, just query
-the registry key HKLM\SYSTEM\CurrentControlSet\Services for any
-key that has the ImagePath value of "...\Apache.exe"... (quotes
-are significant here, if the leading quote is ommitted the
-entire string ends with the text \Apache.exe - based on Apache's
-own service installer in every released version.)