On Thu, Dec 5, 2019 at 2:17 AM Michael Rogers <mich...@briarproject.org> wrote: > > On 05/12/2019 00:45, Tatu Saloranta wrote: > > On Wed, Dec 4, 2019 at 2:36 AM Michael Rogers <mich...@briarproject.org> > > wrote: > >> > >> The situation on Android is that unfortunately we still need to maintain > >> compatibility with the Java 6 API to support Android 6 and older (about > >> half of currently active devices). Java 8 language features are OK - the > >> Android toolchain transforms them into Java 6-compatible bytecode. > >> > >> So from my point of view it would be nice if a supported version of > >> Jackson was compatible with the Java 6 API for a few more years. > >> > >> Animal Sniffer can be used to check API compatibility at build time. > > > > Interesting. > > > > One thing that I am missing, unfortunately, is a regression test suite > > that could detect cases where post-JDK6 API was being used. It would > > be great if there was a profile for Travis (for example), to test this > > out. I do get bug reports for regressions, but those are > > after-the-fact (i.e. when a version has broken compatibility). > > I've only used the Gradle plugin myself, but Animal Sniffer also has a > Maven plugin that could perhaps be incorporated into the Travis build? > > For what it's worth, here's an example of using the Gradle plugin. The > 'sourceCompatibility' line indicates that we can use Java 8 language > features. The 'targetCompatibility' line is misleading; it has to be set > to the same value as 'sourceCompatibility', but we're actually > targetting the Java 6 API. The 'signature' line tells the Animal Sniffer > plugin to check for compatibility with the Java 6 API: > > https://code.briarproject.org/briar/briar/blob/master/bramble-api/build.gradle
Thank you, this could be useful to try out if I find time, or anyone else could try it out. -+ Tatu +- > > Cheers, > Michael > > > -+ Tatu +- > > > >> > >> Cheers, > >> Michael > >> > >> On 21/11/2019 18:53, Marshall Pierce wrote: > >>> I think anyone who's current enough to be on recent Jackson is going to > >>> be on at least Java 8. I see pretty widespread Java 8 minimums on > >>> libraries these days, so I think 2.11 is fine as long as you're OK with > >>> 2.10 being the LTS one. > >>> > >>> That said, I'm mercifully not working in Android for a long time so I > >>> don't know what their situation is; maybe everyone just uses org.json > >>> there ;) > >>> > >>> On 11/21/19 11:31 AM, Tatu Saloranta wrote: > >>>> Ok, time to bring this up again. > >>>> > >>>> So. Currently jackson-databind 2.10 may be run on JDK 7 (*). Other > >>>> components differ in that jackson-annotations and jackson-core run on > >>>> JDK 6, and some modules need JDK8 (Java 8 obviously, but some > >>>> dataformats have deps that need Java 8 as well). > >>>> > >>>> Jackson 3.0 (master) requires JDK 8 already; but since it is in > >>>> development, target JDK can be re-considered at some point. > >>>> > >>>> But. Would it make sense to upgrade baseline JDK 8 requirement for > >>>> `jackson-databind`? Doing this would mostly matter (IMO) in that doing > >>>> that would allow use of closures (method pointers) for API / > >>>> configuration. There would be some other smaller benefits, like > >>>> directly including `Optional` support, constructor name parameter > >>>> access. > >>>> > >>>> If we were to move the baseline, this could happen as early as 2.11 > >>>> (probably due in Jan 2020), or if not, following that in 2.12. > >>>> Whatever version predating this version would also become "long-term > >>>> supported" Jackson version, i.e. be patched longer than usual, to > >>>> support use cases where going Java 8 is not possible > >>>> > >>>> But first I would like to know of users, if any, that use Jackson on > >>>> pre-Java8 platforms (or platforms where full JDK 8 based version would > >>>> not work). > >>>> > >>>> So: concerns, comments, suggestions? > >>>> > >>>> -+ Tatu +- > >>>> > >>>> (*) there are occasionally reported issues wrt whether it truly works > >>>> on some of sorta-J2SE platforms, like Android, but aside from those > >>>> > >>> > >> > >> -- > >> You received this message because you are subscribed to the Google Groups > >> "jackson-user" group. > >> To unsubscribe from this group and stop receiving emails from it, send an > >> email to jackson-user+unsubscr...@googlegroups.com. > >> To view this discussion on the web visit > >> https://groups.google.com/d/msgid/jackson-user/60029ccb-fc02-0ded-a15d-351462ffb133%40briarproject.org. > > -- You received this message because you are subscribed to the Google Groups "jackson-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to jackson-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jackson-user/CAL4a10jcgK9%3Dt1ExcTm%2BhHpf4UcPgqWn7SB3gLpxwWArL8bQHQ%40mail.gmail.com.
