Re: timezone for web users?
Re: timezone for web users?
- Subject: Re: timezone for web users?
- From: Jesse Tayler <email@hidden>
- Date: Tue, 09 Jul 2013 00:14:37 -0400
ya, timezones are ALWAYS a problem.
I have no idea where or why I had those static defaults but clearly, things are better without them.
Maybe I have trouble in ERRest now...I’ll report if I see more about it.
Ramsey’s component has done well at figuring the TZ during normal web use, so — so far, so good.
On Jul 8, 2013, at 8:40 PM, Chuck Hill < email@hidden> wrote: On 2013-07-08, at 5:34 PM, Paul Hoadley wrote: On 09/07/2013, at 3:29 AM, Jesse Tayler <email@hidden> wrote:
I realize I had apparently statically set the timezone to GMT?
Maybe I did this for my database??
I had this in my app constructor
static {
// Set default time zones
//TimeZone.setDefault(TimeZone.getTimeZone("GMT"));
//NSTimeZone.setDefaultTimeZone(NSTimeZone.getGMT());
}
once I noticed those two line and commented them out, general <wo:str>’s zapped into a correct timezone on display - my component is another story but--
now I wonder if I’ll be storing my dates differently in the database?
In my experience, you almost certainly want to leave those setDefault calls _in_. The only failsafe way to deal with timezones is to set UTC everywhere except the view layer. So, yes, you want to ensure your database is storing timestamps as UTC (and not doing any "helpful" timezone conversions on the way in or out), the JVM's default is UTC, and WebObjects default is UTC. The only time you do a conversion is on the way in from the view, or on the way out to the view, both using a user-selected or automatically-detected timezone offset.
Having spent many quality hours with time zones and time stamps in WO, I completely agree with Paul. Madness lies in any other direction. Chuck -- Chuck Hill Executive Managing Partner, VP Development and Technical Services Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems. http://www.global-village.net/gvc/practical_webobjectsGlobal Village Consulting ranks 13th in 2012 in BIV's Top 100 Fastest Growing Companies in B.C! Global Village Consulting ranks 44th in 25th annual PROFIT 500 ranking of Canada’s Fastest-Growing Companies by PROFIT Magazine!
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