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DevFest Nantes 2016 - Jigsaw est prêt à tuer le classpath Java
The document primarily discusses the evolution of Java's classloading and module systems, particularly emphasizing the transition from the traditional classpath to the new module system introduced in Java 9 (Project Jigsaw). It covers various aspects such as class loaders, OSGi bundles, dependencies, and demonstrates examples of modularization and classpath management. The speaker, Alexis Hassler, emphasizes the need for developers to adapt to these changes and illustrates practical implementations using examples.
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DevFest Nantes 2016 - Jigsaw est prêt à tuer le classpath Java
- 1. 1DEVFEST NANTES 16 DEVFESTNANTES 16 Jigsaw est prêt à tuer le classpath @AlexisHassler - #devfestnantes
- 2. "Classpath is dead!" MarkReinhold JavaOne 2009
- 3. 3DEVFEST NANTES 16 ClasspathClassloader Succession Jigsaw
- 4. 4DEVFEST NANTES 16 AlexisHassler Développeur Formateur Indépendant Fondateur Préparateur de
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- 6. 6DEVFEST NANTES 16 Stringhello = "Salut à vous tous les zazous"; Chercher les classes CLASSPATH Hello var = new Hello();
- 7. 7DEVFEST NANTES 16 -classpath java-cp hello-lib.jar HelloWorld
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- 10. 10DEVFEST NANTES 16 java.lang.ClassLoader loadClass(Stringname) : Class<?> getResource(String name) : URL getResourceAsStream(String name) : InputStream getParent() : ClassLoader
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- 13. 13DEVFEST NANTES 16 BootstrapClassloader BootstrapClassLoader
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- 15. 15DEVFEST NANTES 16 Délégation SystemClassLoader java -cp hello-lib.jar ...
- 16. 16DEVFEST NANTES 16 bootclasspath java-Xbootclasspath/p:hello-lib.jar ... java -Xbootclasspath:hello-rt.jar ... java -Xbootclasspath/a:hello-lib.jar ... BootstrapClassLoader
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- 18. 18DEVFEST NANTES 16 Démonstration BootstrapClassLoader java-cp example.jar fr.sewatech.classpath.Count System ClassLoader java.lang.Integer example.jar java.lang.Integer
- 19. 19DEVFEST NANTES 16 example.jar Démonstration java -Xbootclasspath/p:example.jar fr.sewatech.classpath.Count BootstrapClassLoader java.lang.Integer java.lang.Integer
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- 21. 21DEVFEST NANTES 16 URLClassloader SystemClassLoader Bootstrap ClassLoader URL ClassLoader URL ClassLoader URL ClassLoader Parent frst Parent frst Parent frst
- 22. 22DEVFEST NANTES 16 DIYClassloader
- 23. 23DEVFEST NANTES 16 Usages ApplicationServers JRebel Javassist, CGLib,...
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- 26. 26DEVFEST NANTES 16 Démonstration message-launcher message-common message-printer message-service message-service SystemClassLoader ParentFirst ClassLoader
- 27. 27DEVFEST NANTES 16 Démonstration message-launcher message-common message-printer message-service message-service SystemClassLoader LocalFirst ClassLoader
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- 29. 29DEVFEST NANTES 16http://www.ironmaidenwallpaper.com/
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- 34. 34DEVFEST NANTES 16 Granularité Sécurité Apachecommons-collections https://foxglovesecurity.com/
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- 37. 37DEVFEST NANTES 16 1999 Javaembarqué Java SE Java serveur
- 38. 38DEVFEST NANTES 16 Bundle-Name= Hello Service Bundle-SymbolicName = hello-service Bundle-Description = Hello Service Bundle Bundle-Version = 1.0.1 Export-Package = fr.sewatech.classpath Import-Package = fr.sewatech.classpath.print;version=1.3 OSGi Bundle
- 39. 39DEVFEST NANTES 16 OSGi OS+ Hardware Java Runtime Module Life Cycle Services
- 40. 40DEVFEST NANTES 16 JBossModules java -jar jboss-modules.jar -mp path/to/modules my.main.module.name Base de JBoss OSGi Java SE
- 41. 41DEVFEST NANTES 16 JBossModules module.xml resource dependency slot dependency slot dependency slot name slot resource resource
- 42. 42DEVFEST NANTES 16 Jigsaw 9(2016) 8 (2012) (2017) Projet Intégré au JDK 7 (2008)
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- 44. 44DEVFEST NANTES 16 Jigsaw Modularitédes applications // module-info.java module message.service { requires java.xml.bind; requires message.common; exports fr.sewatech.message; }
- 45. 45DEVFEST NANTES 16 Jigsaw Compilation javac--module-path modules -d target/classes/ $(find src/main/java/ -name "*.java")
- 46. 46DEVFEST NANTES 16 Jigsaw Exécution java--module-path jigsaw-modules -m misc.examples/fr.sewatech.example.Main
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- 49. 49DEVFEST NANTES 16 Classpathmode java -classpath lib/* fr.sewatech.example.Main
- 50. 50DEVFEST NANTES 16 ModularJDK rt.jar tools.jar
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- 53. 53DEVFEST NANTES 16 Dependencies modulemessage.service { requires message.printer; requires slf4j.api; } module message.printer { requires transitive message.common; } message.printer message.service message.common
- 54. 54DEVFEST NANTES 16 modulemessage.service { requires message.printer; requires slf4j.api; } Dependencies Automatic modules slf4j-api-1.5.2. slf4j.api message.service
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- 56. 56DEVFEST NANTES 16 Dependencies modulemessage.service @ 1.0 { requires message.printer @ 1.0; requires slf4j.api @ 1.7; } Module version
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- 59. 59DEVFEST NANTES 16 Exports Accessibility publicfor other modules module message.service { exports fr.sewatech.message; }
- 60. 60DEVFEST NANTES 16 Exports Accessibility publicfor some modules module java.base { exports sun.reflect to java.logging, java.sql, jdk.scripting.nashorn; }
- 61. 61DEVFEST NANTES 16 field.setAccessible(true); Exports java.lang.reflect.InaccessibleObjectException Refection modulemessage.service { exports private java.security; }
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- 63. 63DEVFEST NANTES 16 Classloader java.net.URLClassLoaderFLTMClassLoader java.lang.ClassLoader
- 64. 64DEVFEST NANTES 16 BootClassLoader bootclasspath java-Xbootclasspath/p:hello-lib.jar ... java -Xbootclasspath:hello-rt.jar ... java -Xbootclasspath/a:hello-lib.jar ...
- 65. 65DEVFEST NANTES 16 Patch Compile Run javac-Xmodule:java.base -d ../patch-classes src/java/lang/Integer.java java --patch-module java.base=patch.jar --module-path jigsaw-modules -m misc.examples
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- 68. 68DEVFEST NANTES 16 Allerplus haw avec Jigsaw Service Providers / Loaders Layers : versioning jlink : custom JRE jdeps : migration ...
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- 71. 71DEVFEST NANTES 16 Planning Outils ? Maven,Gradle, IDE Livrairies ? SLF4J, Guava,... Frameworks ? Spring, Hibernate,... Runtimes ? Java EE, Tomcat,... Hadoop,...
- 72. 72DEVFEST NANTES 16 Essayer... https://jdk9.java.net/download/ Exécutabled'installation https://jdk9.java.net/jigsaw/ Archive Dernières évolutions de Jigsaw
- 73. 73DEVFEST NANTES 16 Apprendre+ JavaOne http://openjdk.java.net/projects/jigsaw/talks/ Quick-Start Guide http://openjdk.java.net/projects/jigsaw/quick-start The State of the Module System http://openjdk.java.net/projects/jigsaw/spec/sotms/
- 74. 74DEVFEST NANTES 16 module-pathis born classpath is NOT dead Conclusion
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