On 05/12/2019 00:45, Tatu Saloranta wrote: > On Wed, Dec 4, 2019 at 2:36 AM Michael Rogers <[email protected]> > 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 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 [email protected]. >> 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jackson-user/fdcd0487-ad10-42db-7323-a73c4b9c6972%40briarproject.org.
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