DevoxxFR17 - Préparez-vous à la modularité selon Java 9
•
0 gefällt mir•360 views
La principale nouveauté de Java 9 viendra du coté de la modularité. Et qu'on le veuille ou non il faut tenir compte de ce changement et s'y préparer.
Empfohlen
Empfohlen
Weitere ähnliche Inhalte
Was ist angesagt?
Was ist angesagt? (20)
Ähnlich wie DevoxxFR17 - Préparez-vous à la modularité selon Java 9
Ähnlich wie DevoxxFR17 - Préparez-vous à la modularité selon Java 9 (20)
Mehr von Alexis Hassler
Mehr von Alexis Hassler (20)
Kürzlich hochgeladen
Kürzlich hochgeladen (20)
DevoxxFR17 - Préparez-vous à la modularité selon Java 9
- 1. Préparez-vous à la modularité selon Java 9 Rémi Forax Alexis Hassler #DevoxxFR
- 2. Official Hashtag #DevoxxFR #PreparezVousALaModularitéSelonJava9AvecRemiForaxEtAlexisHassle #DevoxxFR
- 5. Classpath - compile time Build tool Maven Gradle … #DevoxxFR
- 6. Classpath - runtime jarjarjarjar jarjarjar jar jarjar asm-3.1.jarjarjar asm-2.3.jar #DevoxxFR
- 7. Scale Down rt.jar 66 MB guava.jar 2.3 MB spring- context.jar 1 MB #DevoxxFR
- 13. Modular JDK java.basejava.desktop java.sql java.naming java.xmljava.compiler java.logging java.management #DevoxxFR
- 15. Deprecated JDK modules java.xml.bind java.xml.ws java.xml.ws.annotations java.transaction java.corba java.activation #DevoxxFR
- 16. Deprecated JDK modules 69… back to Java EE #DevoxxFR
- 17. Non-standard JDK modules sun.* com.sun.* Deleted classes Hidden packages #DevoxxFR
- 18. Non-standard JDK modules Internal modules jdk.net jdk.attach jdk.httpserver jdk.* #DevoxxFR
- 19. Module descriptor /* module-info.java */ module app.main { requires java.base; requires java.sql; requires java.management; } #DevoxxFR
- 20. Build module javac -d target/main/exploded --source-path src/main/java $(find src/main/java -name "*.java") jar --create --file target/main/artifact/app.main-1.0.jar -C target/exploded/app.main . #DevoxxFR
- 21. Run module java --module-path modules --class-path dependencies/library.jar -m app.main/com.app.main.Main #DevoxxFR
- 25. Module descriptor /* module-info.java */ module app.main { requires java.sql; requires java.management; requires app.module1; requires app.module2; } #DevoxxFR
- 26. Export package module app.module1 { …; exports com.app.api; } #DevoxxFR
- 27. Multi-modules layout 1 project = n modules javac -d target/main/exploded --module-source-path src/main/java $(find src/main/java -name "*.java") #DevoxxFR
- 28. Multi-modules layout src/main/java app.main module-info.java fr/app/pkg ... .java fr/app/main Main.java app.api module-info.java a folder with a qualified name ... #DevoxxFR
- 29. Create module jar --create --file target/main/artifact/app.main-1.0.jar --main-class com.app.main.Main -C target/exploded/app.main . #DevoxxFR
- 30. The Jigsaw Sandwich Runtime Compile time #DevoxxFR
- 32. Create module jar --create --file target/main/artifact/app.main-1.0.jar --module-version=1.0 --main-class com.app.main.Main -C target/exploded/app.main . #DevoxxFR
- 38. Visibility Public For other module module app.api { …; exports com.app.api; } #DevoxxFR
- 40. Regular export module app.impl { … exports com.app.internal; } #DevoxxFR app.main com.app.internal app.impl app.api com.app.api ?
- 41. Restricted export module app.impl { … exports com.app.internal to app.api } #DevoxxFR app.main com.comp.app.internal app.impl app.api com.comp.app.api ?
- 44. sun.misc.Unsafe module java.base { … exports sun.misc; exports jdk.internal.misc to java.rmi, java.sql, jdk.charsets, … } module jdk.unsupported { exports sun.misc; } New internal unsafe API (hidden) Keep sun.misc in 9, remove features when public replacement APIs exist #DevoxxFR
- 45. Deep reflection field.setAccessible(true); java.lang.reflect.InaccessibleObjectException #DevoxxFR
- 46. Deep reflection Open a package module app.impl { …; opens exports com.app.internal; } Open all the packages of the module open module app.impl { …; } #DevoxxFR
- 49. Transitive dependency module app.module1 { requires …; requires transitive app.module2; } module app.main { requires …; requires app.module1; requires app.module2; } #DevoxxFR
- 50. Static dependency module app.module1 { requires …; requires static app.module2; } Compile time only #DevoxxFR
- 52. Plain old jar No dependency to classpath javac --class-path deps/old-lib-1.2.jar … #DevoxxFR
- 53. Plain old jar app.main app.module1 old-lib-1.2classpath modulepath #DevoxxFR
- 54. Automatic Module Plain old jar in module-path javac --module-path deps … module app.module1 { …; requires old.lib; } #DevoxxFR
- 57. Mixed mode javac --module-path deps --class-path deps/other-lib.jar … #DevoxxFR
- 62. User / Provider module app.main { requires app.api; uses … .api.Service; } module app.impl { requires app.api; provides … .api.Service with … .service.ServiceImpl; } #DevoxxFR Main Service ServiceImpl module app.api { exports … .api; }
- 63. Usage … ServiceLoader.load(ModuleInput.class) .stream() . … ; … #DevoxxFR
- 65. Running on Java 9 Compiling in Java 8 #DevoxxFR
- 67. Big kill switch --permit-illegal-access This option will only be supported in JDK 9. It will be removed in JDK 10. #DevoxxFR
- 68. Command line java / javac Add root module --add-modules #DevoxxFR
- 69. Command line java / javac --add-reads module=anotherModule --add-exports module/package=anotherModule --add-opens module/package=anotherModule #DevoxxFR
- 70. jdeps Diagnostic tool since Java 8 jdeps --jdk-internals #DevoxxFR
- 71. Tests #DevoxxFR
- 73. Test module Compile time app.module1 com.app.pkg1 <<requires>> <<requires>> com.app.pkg1.test app.module1.test <<reads>> junit org.junit #DevoxxFR
- 74. Test module Test module-info.java module app.module1.test { requires junit; requires app.module1; } #DevoxxFR
- 75. Test module Compile $JAVA_HOME/bin/javac -d target/test/exploded --module-path dependencies:target/main/artifact $(find src/test/java/ -name "*.java") #DevoxxFR
- 76. Test module Run time hamcrest-core app.module1 com.app.pkg1 <<requires>> <<requires>> com.app.pkg1.test app.module1.test <<reads>><<reflection>> junit org.junit #DevoxxFR
- 77. Test module Run $JAVA_HOME/bin/java --module-path dependencies: target/main/artifact:target/test/artifact --class-path dependencies/hamcrest-core-1.3.jar --add-modules app.module1.test -m junit/org.junit.runner.JUnitCore com.app.pkg1.test.AClassTest #DevoxxFR
- 80. Single module Compile $JAVA_HOME/bin/javac -d target/test/exploded --module-path dependencies:target/main/artifact --add-reads app.module1=junit --add-modules junit --patch-module app.module1=src/test/java $(find src/test/java/ -name "*.java") #DevoxxFR
- 82. Single module Run $JAVA_HOME/bin/java --module-path dependencies: target/main/artifact --class-path dependencies/hamcrest-core-1.3.jar --add-modules app.module1 --add-reads app.module1=junit --add-exports app.module1/com.app.pkg1=junit --patch-module app.module1=target/test/exploded -m junit/org.junit.runner.JUnitCore com.app.pkg1.AClassTest #DevoxxFR
- 85. jlink Custom runtime image Specific for a platform For small devices or in the cloud #DevoxxFR
- 86. jlink $ jlink --module-path $JAVA_HOME/jmods: target/modules --add-modules app.main, app.service --launcher appx=app.main --output target/image #DevoxxFR
- 87. #DevoxxFR
- 88. Minimal VM $ jlink … --vm=minimal --output image size of the classical VM: 20 megs size of the minimal VM: 3 megs #DevoxxFR
- 89. Ahead Of Time compilation experimental feature ! Module ⇒ shared library .so, .dll, .dynlib $ jaotc --module-path target/modules --module app.main #DevoxxFR
- 90. Ahead Of Time compilation experimental feature ! Run in AOT mode ./image/bin/java -XX:+UseAOT -XX:AOTLibrary=./lib/libjava.base.so … #DevoxxFR
- 94. Jigsaw Goals Reliable configuration No classpath anymore compile time / runtime fidelity #DevoxxFR
- 95. Jigsaw Goals Scale down the platform downsized unit of re-use #DevoxxFR
- 96. Jigsaw Goals Strong encapsulation Separate public types from implementation Enhanced security #DevoxxFR
- 97. Jigsaw Goals Closed World Ahead of time optimizations #DevoxxFR
- 98. Jigsaw Goals Reliable configuration Scale down the platform Strong encapsulation Closed World #DevoxxFR
- 101. Références Download JDK 9 Early Access https://jdk9.java.net/download/ Oracle JDK 9 Documentation http://docs.oracle.com/javase/9/ JavaOne, DevoxxBE talks http://openjdk.java.net/projects/jigsaw/talks/ #DevoxxFR
- 103. Merci #DevoxxFR