Best practice for keeping a mail session open in web application?

Hello,
We have a webmail like application where users login with their IMAP credentials, then are taken to an authenticated area of the site where they can manage different things about their email account.
Right now the application is opening and closing a mail store connection (via a new javax.mail.Session) for each page load based on the current logged in user credentials. To me this seems like it would be a bad practice to keep opening and closing a connection each page load.
Are there any best practices for this situation? It would be nice to be able to open the connection to the mail server on login, then keep that connection open until the person logs out, session expires, etc.
I can probably put the javax.mail.Session into the HTTP session, but that seems like it would break any clustering functionality of tomcat. This would be fine if the machine the user is on didn't fail, but id assume if they failed over to another the mail session would be gone. Maybe keeping the mail session in the http session, checking for a connection, then first attempting to reconnect with the logged in credentials before giving up would be a possiblity?
Any pointers would be appreciated

If you keep the connection open across pages, you're going to need to deal with
timeouts - from the http session and from the mail server.
If you don't keep the connection open, you're going to need to "resynchronize"
your view of the store/folder with each operation, in case the folder is modified
by another session.
The former is easier in the common cases, especially if you don't care how gracefully
you handle failures. The latter is more difficult in the common cases, but handles
failure better, and in particular handles clustering better. You'll need to measure it to
see if it meets your performance and scalability requirements. You may need to mix
the two approaches to get acceptable performance.

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This posting is provided "AS IS" with no warranties or guarantees and confers no rights

Hi,
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RD Gateway deployment in a perimeter network & Firewall rules
http://blogs.msdn.com/b/rds/archive/2009/07/31/rd-gateway-deployment-in-a-perimeter-network-firewall-rules.aspx
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Amihan_Zerrudo wrote:
1.) What is the cost of having the scope in a <jsp:useBean> tag set to 'session'? I am aware that there are a list of scopes like page, application, etc. and that if i use 'session' my variable will live for as long as that session is alive. (did i get this right?). You should rather look to the functional requirements instead of costs. If the bean need to be session scoped (e.g. maintain the logged in user), then do it so. If it just need to be request scoped (e.g. single page form data), then keep it request scoped.
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struct Params
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int errorCode = 0;
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float metric2;
float metric3;
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Here are some more specific questions:
Most of the LabVIEW examples that I've seen (at least at the beginner level) seem to heavily rely on using the front panel controls to provide inputs to functions. How do I build a VI where the input arguments(input1, input2, etc) come as numbers, and aren't tied to dials or buttons on the front panel?
The structure of the C function seems to rely heavily on the use of stack variables like metric1 and metric2 in order to perform calculations. It seems like creating temporary "stack" variables in LabVIEW is possible, but frowned upon. Is it possible to keep this general structure in the LabVIEW VI without making the code a mess?
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There's already a couple of good answers, but to add to #1:
You're clearly looking for a typical C-function. Any VI that doesn't require front panel opening (user interaction) can be such a function.
If the front panel is never opened the controls are merely used to send data to the VI, much like (identical to) the declaration of a C-function. The indicators can/will be return values.
Which controls and indicators are used to sending data in and out of a VI is almost too easy; Click the icon of the front panel (top right) and show connector, click which control/indicator goes where. Done. That's your functions declaration.
Basically one function is one VI, although you might want to split it even further, dont create 3k*3k pixel diagrams.
Depending on the amount of calculations done in your If-Thens they might be sub vi's of their own.
/Y
LabVIEW 8.2 - 2014
"Only dead fish swim downstream" - "My life for Kudos!" - "Dumb people repeat old mistakes - smart ones create new ones."
G# - Free award winning reference based OOP for LV

What are best practices for managing my iphone from both work and home computers?

What are best practices for managing my iphone from both work and home computers?

Sync iPod/iPad/iPhone with two computers
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tt2

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