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IRC log for #virtualJUG, 2016-11-12

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Time S Nick Message
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15:52 mani_ Hi all, is everyone from the session online - Hendrik, Gummi, Heather, Simon?
15:52 sjmaple_ yo yo yo\
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15:59 vidit hi :)
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16:00 sjmaple hey Vidit
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16:01 HendrikEbbers Hi
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16:02 Slawek hi, I can see the livestream, same by you?
16:02 Slawek can't
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16:02 vidit hi sjmaple
16:02 vidit hi everyone :)
16:02 LordChaitanya i'm not able to see the live stream
16:02 vidit it says starting soon
16:02 Yawz "Live stream is starting soon..."
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16:03 Slawek let's wait then :)
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16:03 sjmaple we'll start in just a second :)
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16:05 miragemiko you have even more
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16:08 sjmaple we're live now
16:09 pathfinder2104 cool (y)
16:09 sjmaple you should see the video :)
16:09 pathfinder2104 thanks Simon :)
16:09 Kumar what is the email id to join hangouts
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16:09 martinr1 Hi Kumar, I don't know there is a hangout, where's it at?
16:10 sjmaple that's just open to JUG locations - if you're a JUG I can ping you the URL
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16:10 sjmaple we have limited slots on the hangout though - unfortunately it has limited spaces though so I tend not to make it open to all
16:11 Kumar okey, I will make it in online youtube live
16:11 sjmaple martinr1: the stream is at http://virtualjug.com
16:12 pathfinder2104 some bass sound
16:12 Kumar yes, I have connected this streaming from London. Thanks
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16:18 martinr1 @Heather How does OpenJDK evolve to the Oracle JDK?
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16:20 martinr1 @heathervc How does OpenJDK evolve to the Oracle JDK?
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16:21 martinr1 SE, EE, and what is the third platform?
16:22 martinr1 Sound just went south
16:22 pathfinder2104 yep
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16:22 mani_ Has everyone downloaded the latest JDK 9 EA build from https://jdk9.java.net/download/
16:22 pathfinder2104 nope
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16:22 pathfinder2104 downloading right now
16:23 mani_ Please do that as it will be something we will be touching in the next moment or two
16:23 pathfinder2104 thanks
16:24 martinr1 Thanks for the answer (and asking) (So it's the same code base + some extra code)
16:24 sjmaple yeh, most vendor impls do just that
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16:25 sjmaple so Azul for example does the same, they grab the OpenJDK and deliver value adds on top
16:26 mani_ Please also clone https://github.com/AdoptOpenJDK/gamified-java9-hackathon and https://github.com/AdoptOpenJDK/jdk9-jigsaw for the Jigsaw session
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16:41 mani_ All your @java #JDK9 @OpenJDK @adoptopenjdk questions/comments can be sent http://mail.openjdk.java.net/mailman/listinfo/adoption-discuss
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16:42 martinr1 Are the slides from the current presentation available somewhere?
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16:44 mani_ Hendrik will also make his slides available at the end of the session
16:46 martinr1 thanks, got it (http://www.slideshare.net/heathervc)
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16:48 martinr1 The slides of the first presentation can be found at: http://www.slideshare.net/heathervc (clickeable now)
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16:52 Slawek java home change for mac os
16:52 Slawek export JAVA_HOME=/Library/Java/JavaVirtua​lMachines/jdk-9.jdk/Contents/Home
16:53 pathfinder2104 can you please post the page url here?
16:53 JoseMiguel1999 Example in windows
16:54 ishanp https://wiki.openjdk.java.net/dashboard.action;jsessionid=7885CF82FBADC52D07922BE0428FF5DD
16:54 pathfinder2104 thanks
16:54 ishanp https://wiki.openjdk.java.net/dashboard.action
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16:55 ishanp which flag?
16:55 JoseMiguel1999 set JAVA_HOME="C:\Program Files\Java\jdk-9"
16:55 Naveen the display is not clear
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16:55 JoseMiguel1999 set PATH=%JAVA_HOME%\bin;
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16:59 sjmaple if you do that to your path, remember to add the prev path to it too :)
16:59 sjmaple set PATH=%JAVA_HOME%\bin;%PATH%
17:00 sjmaple this will add the javahome to the head of your existing path
17:00 martinr1 @heathervc Hi Heather, a lot of existing if not all JSRs seem pretty advanced and hard to get started with. Could you give an actual example of what an entry level JCP associate could contribute?
17:00 sjmaple great question, martinr1
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17:01 JoseMiguel1999 create a bat file with
17:01 JoseMiguel1999 set JAVA_HOME="C:\Program Files\Java\jdk-9"
17:01 JoseMiguel1999 set PATH=%JAVA_HOME%\bin;
17:01 JoseMiguel1999 and run it in a cmd
17:02 sjmaple @JoseMiguel1999 -- set PATH=%JAVA_HOME%\bin;%PATH%
17:02 sjmaple otherwise you erase your old path
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17:06 sunnythepooh fyi gradle has a few problems with Java 9 right now: https://issues.gradle.org/browse/GRADLE-3287 - mostly affect running unit tests under gradle
17:07 mani_ Any questions about the Outreach page https://wiki.openjdk.java.net/display/Adoption/JDK+9+Outreach
17:07 martinr1 Thanks guys!
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17:08 mani_ Please tweet your findings on twitter - https://twitter.com/virtualJUG/status/797092012830945280
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17:13 mani_ Handy script - https://github.com/AdoptOpenJDK/jdk9-jigsaw/blob/master/getJigsawJDK.sh …, pls help improve it, #windows version is also welcome!  Pull requests are welcome for this & other aspects of the git repo.
17:16 KUMAR Is this shell something like scala, python shell ?
17:16 sjmaple yeh, pretty much
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17:17 sjmaple REPL style
17:17 sjmaple well, it is a REPL I guess :)
17:17 KUMAR yes
17:17 sunnythepooh real dev develops on Linux, or Bash shell on Windows :-)
17:17 wegbert is there any way to load a file? e.g. i could create a defaultimports.jsh to imports a bunch of packages by default just to facilitate
17:17 KUMAR the shell developed in Java itself?
17:18 sunnythepooh java.util.stream.IntStream
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17:19 sunnythepooh range not ranged
17:20 cchacin Do we need the semicolon after each sentence?
17:21 JoseMiguel1999 That's very very interesting tool.
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17:24 KUMAR please focus the editor while any commands are running
17:25 JoseMiguel1999 Can I save the file in a .java source file?
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17:27 sjmaple I don't think so
17:28 sjmaple I think they're just a list of commands that you then open in a jshell, but I'm going from memory :)
17:28 sjmaple it should open .java files though
17:31 cchacin You can use the /open and /save commands
17:35 cchacin Useful tool to change JDKs versions:http://www.jenv.be/
17:35 JoseMiguel1999 can you maximize the slides?
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17:41 slampine maybe use find instead of tree? should be in all unixes...
17:42 cchacin Can someone share the link to the github repo here?
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17:44 slampine git clone https://github.com/AdoptOpenJDK/jdk9-jigsaw
17:44 martinr1 Is there a way to find out which JSRs a local JUG participates in?
17:45 cchacin thanks
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17:52 michaelb John is getting very upset
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17:53 martinr1 Thank you all for organizing and participating in this vJUG session.
17:53 sjmaple michaelb: John?
17:54 wegbert great, i was wondering why duplicate the full package name there
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17:54 michaelb He's alright now
17:55 mani_ Any questions on the Jigsaw part shown so far - is everything clear? Any feedback is welcome.
17:55 KUMAR is there any performance optimisation improvements in java9
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17:55 sjmaple @mani: <wegbert> great, i was wondering why duplicate the full package name there
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17:56 sunnythepooh If you have a improvement you wanted to suggest to OpenJDK, when do you use a JEP process and when do you want to submit a JSR?
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17:57 KUMAR Is Jigsaw new feature from only java9? or it can be achieved in existing java versions?
17:57 mani_ @sjmaple - good question, cant' remember if its convention or it was just a contrived example, I would like to test this out again with different naming conventions and see what happens
17:57 wegbert any IDE is already supporting jiigsaw? validating is a given package is declared in mod file and so on
17:58 mani_ @KUMAR - only with JDK9 - its massive overhaul at JDK and OpenJDK levels so can't be on different versions
17:58 mani_ of Java (former versions)
18:00 sunnythepooh @KUMAR There are major improvement in Hotspot around using intel cpu features, as well as String optimization http://openjdk.java.net/jeps/254
18:00 mani_ Good one @KUMAR I should have mentioned it as well, but there are many such enhancements
18:01 sunnythepooh also they have looking to providing AOT in hotspot  http://openjdk.java.net/jeps/295
18:01 mani_ @Sunny thats a new one, I think the outreach page isn't update because it might not be available yet
18:01 KUMAR any java programs developed so far in jdk8 would not have any problem running with jdk9? like obsolete methods?
18:02 mani_ @KUMAR depends - best is to look at the outreach page and build/run the applications under JDK9 - there are deprecations and removals so there could be breakage or unusual behaviour
18:03 sunnythepooh JEP 246: Leverage CPU Instructions for GHASH and RSA http://openjdk.java.net/jeps/246
18:04 KUMAR Okey, the applications developed so far in java8 again needs modifications while upgrading into jdk9
18:04 mani_ @KUMAR - check this out  https://wiki.openjdk.java.net/display/Adoption/JDK+9+Outreach
18:04 KUMAR Thanks for answering, will go through Outreach
18:05 sunnythepooh Classloaders in Java 9 is quite different from Java 8 - we have seen a lot of apps with Classloader hirecharchy assumption
18:05 sunnythepooh naughty but people does it
18:07 mpasteven Classloaders can break in subtle ways too, especially when stacked
18:10 sunnythepooh And a lot of apps makes assumption that URLClassloader is part of the bootclassloader, and then they fiddle with the internals to change the classpath entres
18:11 sunnythepooh And obviously that will break in JAva 9
18:11 sunnythepooh that;s the issue that broke gradle
18:11 JoseMiguel1999 I had problems with Hibernate+JPA and hibernate 5.
18:12 JoseMiguel1999 because Classloader
18:13 wegbert is there any way to switch the classloader method? like in GC
18:14 sunnythepooh No. People shouldn't make assumption about classloader
18:15 sjmaple you can switch classloader strategy in containers, but you shouldn't make assumptions about CLs in your code
18:16 KUMAR Thanks all for your efforts
18:17 slampine nice, thanks
18:17 wegbert got it, because if the Java9 can break some libs i guess we will have to wait for changes or correct them by ourselves
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18:18 sunnythepooh yes raise it with the libs developers now that we are 6 months away
18:18 JoseMiguel1999 More details my problem here: https://hibernate.atlassian.net/browse/HHH-10092
18:19 miragemiko was great !
18:19 wegbert Thank you all! Was really great
18:19 sjmaple thank you everyone! :)
18:19 KUMAR It was a very great team collaboration, thanks for bringing up
18:19 JoseMiguel1999 Thanks for the explanation, it makes sense
18:20 pathfinder2104 nice work guys :) thank you all :) :) :)
18:21 mani_ We can continue these on the VJug or Adoption Discuss mailing lists
18:21 mani_ Thanks all for the awesome participation, questions and sharings.
18:21 mani_ Have a nice weekend all!
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