[tz] Joda-time Installed TZ DB Release Reporting and Updating (was: Java Installed TZ DB Release Reporting)

[Brian Inglis]

You can easily find out the proper places to ask these questions with a simple
search for the project Joda-time!

It is not on this list which does not support downstream products and
derivatives, many of which should not be used in any production system, as they
do nothing towards the essential task of updating the data, or providing clear
and usable automated processes or documentation about maintaining the data, or
providing processes or information about managing it.

To find out if it is possible to query the time zone version under Joda time,
raise a documentation issue at:

	https://github.com/JodaOrg/joda-time/issues

and request they provide the sample code and add that to their documentation.

To update Joda-time TZ data follow the build process at to rebuild the library:

	https://www.joda.org/joda-time/tz_update.html

and raise an operational issue requesting an automated process be added to
automatically download, apply, and update the library.

As recommended you should have upgraded from this project to java.time when Java
8 was released:

	https://www.joda.org/joda-time/index.html

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.
[Data in IEC units and prefixes, physical quantities in SI.]


On 2020-05-22 14:43, Sundar Sarma wrote:
> Instead of java.time
> (System.out.println(java.time.zone.ZoneRulesProvider.getVersions("UTC").keySet());))
> )
> 
> I want the above code in joda.time. Could you please help me?? 
> I didn't get ZoneRulesProvider.getVersions in joda.time.. 
> 
> 
> On Fri, 22 May 2020, 23:16 Brian Inglis, <Brian.Inglis at systematicsw.ab.ca
> <mailto:Brian.Inglis at systematicsw.ab.ca>> wrote:
> 
>     On 2020-05-22 10:10, Sundar Sarma wrote:
>     > we have used this code to get the IANA tz version.
>     >
>     > public static String getTimezoneDatabaseIANAVersion() {
>     >
>     >         File readmeFile = new File(ZONEINFO_PATH, "README");
>     >         File alternativeReadmeFile = new File(ZONEINFO_PATH, "README.txt");
>     >
>     >         if (!readmeFile.exists()) {
>     >             readmeFile = alternativeReadmeFile;
>     >         }
>     >
>     > out read me.txt file contain
>     >
>     > generated by Gradle
>     > Based on http://www.iana.org/time-zones/repository/releases/tzdata2020a.tar.gz
>     >
>     > means we are using correct tzdata2020a.
>     >
>     > But still why there is issue? Something wrong with tz db??
> 
>     Just because there is a file present on your system does not mean that the TZ DB
>     data has been successfully or correctly installed in the JVM you are running,
>     unless that data is known to be directly used by your JVM as TZ data.
> 
>     Please consider using the suggested Java statement or command that directly
>     queries your JVM:
> 
>     System.out.println(java.time.zone.ZoneRulesProvider.getVersions("UTC").keySet());
> 
>     *OR*
> 
>     $ jshell <<<
>     'System.out.println(java.time.zone.ZoneRulesProvider.getVersions("UTC").keySet());'
> 
>     *OR*
> 
>     $ grep -ao '^...TZDB....[12][90][0-9][0-9][a-z]' /usr/lib/jvm/*/lib/tzdb.dat
> 
>     *OR*
> 
>     equivalent if you are running other JVMs;
>     you also need to follow up with your Java, JVM, workstation or server support
>     staff to get TZ DB updates successfully and correctly downloaded and installed
>     in the JVMs you and others are running on a regular basis.
> 
>     -- 
>     Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
> 
>     This email may be disturbing to some readers as it contains
>     too much technical detail. Reader discretion is advised.
>     [Data in IEC units and prefixes, physical quantities in SI.]