Überblick über neue Features von Maven 3.

1. Stefan Scheidt Solution Architect OPITZ CONSULTING GmbH Maven 3 New Features

2. Wer bin ich? Software-Entwickler und Architekt Trainer und Coach Autor und Sprecher

3. Wer ist OPITZ CONSULTING? Last Minute: Offizieller OC 1 Seiter Von Tom Ihr Projektspezialist für Java, SOA und Oracle

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5. Über diesen Vortrag...

6. Was ist Maven? Ein deklarativesBuild-System Convention overConfiguration Wiederverwendung durch Plugins Dependency Management Ein Tool für technisches Projekt-Reporting ein „Software Project Management Tool“

7. Was ist Maven? Ein Open-Source-Projekt bei Apache Ziel: Vereinheitlichen von Build, Verteilung, Projekt-Webseite Zweck: Don‘trepeatyourself! Siehe auch http://maven.apache.org/what-is-maven.html

8. Release-Historie 1.0 Beta 2003 1.0 2004 / Juli 2.0 Alpha 2005 / April 2.0 Beta 2005 / September 2.0 2005 / Oktober 3.0 Alpha 2009 / Februar 3.0 Beta 2010 / April 3.0 2010 / Oktober Quelle: http://archive.apache.org/dist/maven/binaries/

9. Primäre Ziele für Maven 3.0 Refactoring der Code Base Interne Modularisierung

10. Modularisierung Quelle: http://maven.apache.org/ref/3.0/

11. Primäres Anliegen BackwardCompatibility Dafür viele Integrationstests Siehehttps://grid.sonatype.org/ci/view/Maven/job/maven-3.0.x-ITs/

12. Compatibility Notes https://cwiki.apache.org/MAVEN/maven-3x-compatibility-notes.html No moreprofiles.xml Support forprofilesoutside of the POM orthesettings.xml has beenremoved Advise: moveaffectedprofilesintosettings.xml (Hint: mvn--settingssome/settings/file.xml)

13. Compatibility Notes Stricter POM Validation More Errors MoreWarnings Explanationsbased on Exceptions Links to MavenWiki https://cwiki.apache.org/confluence/display/MAVEN/Errors+and+Solutions

14. Compatibility Notes Dependency Resolution fromLocalRepository buildscanonlyaccesslocallycachedartifacts iftheyhavethe proper repositoriesconfigured (Maven 3 keepstrack of artifactorigin)

15. Einschub: Aether A libraryforinteractingwith artifactrepositories Local / RemoteRepositories Workspaces Transport Artifact Resolution

16. Einschub: Maven benutzt Aether

17. Einschub: Aether – Ziele „Wewant to ensurethatprojectsbuilding with SBT, Leinigen, Gradle, Buildr, Ant, or a homegrownsysteminteroperate reliablywithMavenrepositories.“ Jason van Zyl, Aetherquestionsansweredfor JAX

18. Compatibility Notes ClassPathIssues Maven 3 usingAether canresult in different classpaths Warning: mvndependency:tree still useslegacyresolutioncode! (Hint: usemvn--debug)

19. Compatibility Notes PluginRepositories Buildextensions, plugins and plugindependenciesareonlyresolvedfrom<pluginRepositories> (and no longerfrom<repositories>)

20. Compatibility Notes Plugin Version Resolution automaticpluginversionresolution isscheduledfor removal Till then: latestreleaseversionisused, notlatestsnapshotversion

21. Compatibility Notes SnapshotDeployments snapshotartifacts will alwaysbedeployed using a timestampedversion (<uniqueVersion>false</uniqueVersion> has no effect)

22. Compatibility Notes Site Generation All reportingrelatedcode has beenremovedfromMavencore ThereforeonemustuseMaven Site Plugin 3.x Siehe https://cwiki.apache.org/MAVEN/maven-3x-and-site-plugin.html

23. Compatibility Notes Configuration of reportingplugins pluginconfiguration in <reporting> no longeraffectsplugins in <build> (whenexecuting a pluginduringbuildlifecycleorfromcli, onlyconfigurationfrom<build>isconsidered)

24. PluginCompatibility PluginCompatibility Matrix https://cwiki.apache.org/MAVEN/maven-3x-plugin-compatibility-matrix.html Reporting PluginsCompatibility Matrix https://cwiki.apache.org/MAVEN/maven-3x-and-site-plugin.html

25. Maven Shell http://shell.sonatype.org/ https://docs.sonatype.org/display/MVNSH/Home CLI forMaven standalone Java process keepsPOMs in memoryforfasterbuilds replacesmaven-cli-plugin

26. Performance

27. Performance: Parallel builds https://cwiki.apache.org/confluence/display/MAVEN/Parallel+builds+in+Maven+3 Experimental Feature since 3.0 Beta 1 mvn -T 4 clean install # Buildswith 4 threads mvn -T 1C clean install # 1 thread per cpucore mvn -T 1.5C clean install # 1.5 thread per core „20-50% speedimprovementisquitecommon“ Depends on distribution of tests

28. Maven 3 und IDEs Major Java IDEs allreadyinclude (someversion of) Maven 3 Eclipse via m2eclipse, IntelliJ, NetBeans Still no supportby Oracle JDeveloper

29. Maven 3 und CI-Systeme Hudson No supportforMaven 3 yet, voteforhttp://issues.hudson-ci.org/browse/HUDSON-4988 WorkAround: Free Style Projects Shell Command: export M2_HOME=/path/to/apache-maven-3.0-beta-3 export M2=$M2_HOME/bin export PATH=$M2:$PATH cd someproject mvn clean install

30. Maven 3 und CI-Systeme Teamcity No Support in Teamcity 5 Support announcedfor Teamcity 6

31. Maven 3 und Sonar Sonar 2.2 supportsMaven 3 Butyouneed to use sonar-maven3-plugin:2.2 (mvn org.codehaus.sonar:sonar-maven3-plugin:2.2:sonar) Siehe http://www.sonatype.com/people/2010/08/maven-3-and-sonar/

32. PolyglotMaven http://polyglot.sonatype.org/

33. Ausblicke m2eclipse will move to eclipse.org Release of m2eclipse 1.0 „soon“ Release of mvnsh „fairlysoon“ newphase of work on PolyglotMaven OSGiruntime in futurerelease

34. Ausblicke: Maven 3.1 POM format 4.1 Global excludes Versionlessparentelements Mixins New settingssystem New Plugin API

35. Ausblicke - Quellen http://java.profict.nl/presentaties/maven.pdf http://www.sonatype.com/people/↵⌫2010/10/maven-3-0-has-landed/ http://www.infoq.com/news/2010/10/↵⌫maven-30-released Siehe auch https://sonatype.webex.com/sonatype/lsr.php?↵⌫ AT=pb&SP=EC&rID=46805542&rKey=3f773d348b2df17b

36. Fazit „Weseethis as a newbeginningforMaven“ Jason van Zyl

37. Fragen und Antworten

38. Kontakt Stefan Scheidt Solution Architect OPITZ CONSULTING GmbHKirchstr. 6, 51647 GummersbachTel. +49 (2261) 6001 - 0stefan.scheidt@opitz-consulting.com