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Message-ID: <4027D688.3020707@designat7.co.zw>
Date: Mon, 09 Feb 2004 20:50:48 +0200
From: kwirirai <kwirirai@designat7.co.zw>
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To: Tomcat Users List <tomcat-user@jakarta.apache.org>
Subject: Re: Servlet thread safety in Tomcat
References: <004201c3ef3a$58c54210$6f00000a@BALTHAZAR>
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Thanks ,It realy means I have to redesign the whole app ....,but there 
is the issue of networking and Java Mail, it seems the other servlet has 
to wait for a very long time for the other servlet to get all the 
mail.My question is can Tomcat process two sessions of a servlet  
downloading mail at the same time sopposing the other session is 
slow.Will the one with a faster connection finish first or will have to 
wait for the one with slow connection...?

Mike Curwen wrote:

>The one thing that could be said (so far), is to ensure you are using
>properly scoped variables.  Generally speaking, for servlets, that means
>don't use something like the following:
>
>public class myservlet extends HttpServlet {
>
>   private String MyBadlyPlacedVariable = null;
>
>   public void doGet() { // exceptions and parameters snipped for
>brevity
>      
>        MyBadlyPlacedVariable =
>request.getParameter("some_variable_used_later");
> 
>        // later on in the code, use "MyBadlyPlacedVariable"...
>        // it probably contains a value you're not expecting!
>   }
>}
>
>
>You'll for sure experince threading problems, and this is the most
>likely cause of any class of problems that's generically described as:
>"the data is actualy mixing up".
>
>  
>
>>    
>>
>>>-----Original Message-----
>>>From: kwirirai [mailto:kwirirai@designat7.co.zw]
>>>Sent: Monday, February 09, 2004 12:48 PM
>>>To: tomcat-user@jakarta.apache.org
>>>Subject: Servlet thread safety in Tomcat
>>>
>>>Hi All
>>>I am developing an application that uses JavaMail.What I am 
>>>      
>>>
>>concered is 
>>    
>>
>>>the issue of thread safety,and efficiency.My question is do 
>>>      
>>>
>>I need to 
>>    
>>
>>>employ synchronized blocks in my Servlet code or is there another way
>>>      
>>>
>>to
>>    
>>
>>>implement thread safety.I have been experimenting with the 
>>>      
>>>
>>application 
>>    
>>
>>>and I have seen that the data is actualy mixing up.I realy 
>>>      
>>>
>>need to now 
>>    
>>
>>>how Tomcat handles request and issues those request ,this is in 
>>>connection with threading. I have thought about the single 
>>>      
>>>
>>thread model
>>    
>>
>>> in my servlets but I think this is an inefficient method to use.
>>>
>>>Thanks
>>>Kwiri
>>>
>>>
>>>
>>>
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>>>
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>>    
>>
>
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>  
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