running! a servlet at tomcat startup 2007-11-05 - By Johnny Kewl
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Now Tomcat is also a cool pojo application server
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-- -- Original Message -- --
From: "Grzegorz Borkowski" <grzegorzborkowski@(protected)>
To: "Tomcat Users List" <users@(protected)>
Sent: Monday, November 05, 2007 12:52 PM
Subject: Re: running! a servlet at tomcat startup
>
>
> Johnny Kewl wrote:
>>
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>>
>> HARBOR: http://coolharbor.100free.com/index.htm
>> Now Tomcat is also a cool pojo application server
>> -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
>>
>> -- -- Original Message -- -- From: "Johnny Kewl" <john@(protected)>
>> To: "Tomcat Users List" <users@(protected)>
>> Sent: Monday, November 05, 2007 12:18 PM
>> Subject: Re: running! a servlet at tomcat startup
>>
>>
>>>
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>>>
>>> HARBOR: http://coolharbor.100free.com/index.htm
>>> Now Tomcat is also a cool pojo application server
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>>>
>>> -- -- Original Message -- -- From: "loredana loredana"
>>> <loredana888888@(protected)>
>>> To: "Tomcat Users List" <users@(protected)>
>>> Sent: Monday, November 05, 2007 11:48 AM
>>> Subject: Re: running! a servlet at tomcat startup
>>>
>>>
>>> thanks for the response johnny. That's probably the only way it can be
>>> done.. Unfortunatelly for me, I need variables like
>>> request.getContextPath() and from init() method i can't "retrieve" those
>>> values. 10x a lot anyway.
>>> ===================================
>>> Ah, I see now...
>>> Yes parsing context.xml is too much hassle..
>>>
>>> Heres an idea...
>>> When someone drops a WAR in, the context always takes on the webapp
>>> name.
>>> ie for most apps... webapp name = context
>>> So try this...
>>> ServletContext context = getServletContext();
>>> String sWebBase = context.getRealPath("/");
>>
>> MEL just told me that context.getServletContextName()
>>
>> is easier ;)
>
> Be careful! AFAIK, getServletContextName() returns "display-name" value,
> not real context name - please check API!
Thanks.... MEL is blushing ;)
Yes and the way I suggested will give you an extra context/build/web
in the dev environment... so parsing gets a little tricky... unless of
course all you really looking for in the web base folder.
OK, now I'm officially wondering... if one cant get at Request... is there a
better way
to find the name of the web-app/context?
>>>
>>> Than last folder is the context name...
>>> Some String parsing and you got it ;)
>>>
>>> Good luck
>>>
>>> ===================================
>>>
>>>
>>>
>>> -- -- Original Message ----
>>> From: Johnny Kewl <john@(protected)>
>>> To: Tomcat Users List <users@(protected)>
>>> Sent: Monday, November 5, 2007 10:58:54 AM
>>> Subject: Re: running! a servlet at tomcat startup
>>>
>>>
>>>
>>> -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
>>>
>>> HARBOR: http://coolharbor.100free.com/index.htm
>>> Now Tomcat is also a cool pojo application server
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>>> -- -- Original Message -- -- From: "loredana loredana"
>>> <loredana888888@(protected)>
>>> To: <users@(protected)>
>>> Sent: Monday, November 05, 2007 10:32 AM
>>> Subject: running! a servlet at tomcat startup
>>>
>>>
>>> This issue is a classic one already I think. I've googled it and
>>> haven't
>>> found anything that could help solving this problem. I'm probably not
>>> the
>>> one to think about this but...if you would add the
>>> <load-on-startup>1</load-on-startup> to a servlet, and from the init()
>>> method you would somehow try to call the doGet() method, wouldn't that
>>> do
>>> it? wouldn't that run the servlet at startup? did anybody try this
>>> already?
>>> I am trying to do this but I'm having some problem creating
>>> HttpServletRequest and Response objects so I can call doGet(). So if
>>> anyone
>>> did this already, pls let me know how this issue can be fixed! 10x a
>>> lot!
>>> =======================
>>> Hi loredana,
>>> Not sure if you asking or answering ;)
>>>
>>> Yes, <load-on-startup> and then do stuff in the INIT method.
>>> No, why try call doGet().... just init the functions that need initing,
>>> like
>>> the dBPool, or image processing.
>>> The doGet implies you want to return info to a browser.... there isnt
>>> one?
>>> The Init method runs just once.... thats the idea.
>>> <load-on-startup> just lets you get the INIT out of the way, otherwise
>>> it
>>> will happen on the first browser request, and if it takes a long time
>>> the
>>> browser will seem very slow to the user... but that only happens once
>>> anyway.
>>> ????????
>>> ========================
>>>
>>>
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>>
>>
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>
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