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Understanding Sessions  RSS feed

Hassan Schnieder
Posts: 11
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Hello everyone, I'm new here. Nice to meet you.

Let me rephrase my question...

1) I have someone log into my application.
2) The user has to add his "username","password".
3) My application checks the database to see if the username/password already exists.
4) My application returns, "username"/"password" does not exist..."username/password" added to database.

what if 5 people are logging in and checking the data at the same time. Do sessions prevent more than one user viewing or modifying the data in a single instance? I want to prevent someone adding a password that doesn't exist at the same time someone may be adding that password.

Please help me understand this process, if sessions don't take care of that and I don't have to worry then how does one implement code to prevent an error.

best regards,
Bear Bibeault
Author and ninkuma
Posts: 65826
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Please do not cross-post the same question in multiple forums. It wastes people's time when multiple redundant conversations take place.
It is sorta covered in the JavaRanch Style Guide.
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