The document discusses the features and improvements introduced in Maven 3, an open-source project aimed at standardizing build processes in software development. Key topics include changes in dependency management, plugin compatibility, and performance enhancements, as well as compatibility notes for transitioning from earlier versions. Additionally, it provides insights into future developments and support for integration with various IDEs and CI systems.

1. Stefan ScheidtSolution ArchitectOPITZ CONSULTING GmbHMaven 3 New Features

2. Wer bin ich?Software-Entwickler und ArchitektTrainer und CoachAutor und Sprecher

3. Leistungs-angebotJava

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16. Über diesen Vortrag...

17. Was ist Maven?Ein deklarativesBuild-SystemConvention overConfigurationWiederverwendung durch PluginsDependency ManagementEin Tool für technisches Projekt-Reportingein „Software Project Management Tool“

18. Was ist Maven?Ein Open-Source-Projekt bei ApacheZiel:Vereinheitlichen vonBuild, Verteilung, Projekt-WebseiteZweck:Don‘trepeatyourself!Siehe auch http://maven.apache.org/what-is-maven.html

19. 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 / OktoberQuelle: http://archive.apache.org/dist/maven/binaries/

20. Primäre Ziele für Maven 3.0Refactoring der Code BaseInterne Modularisierung

21. ModularisierungQuelle:http://maven.apache.org/ref/3.0/

22. Primäres AnliegenBackwardCompatibilityDafür viele IntegrationstestsSiehehttps://grid.sonatype.org/ci/view/Maven/job/maven-3.0.x-ITs/

23. Compatibility Noteshttps://cwiki.apache.org/MAVEN/maven-3x-compatibility-notes.htmlNo moreprofiles.xmlSupport forprofilesoutside of the POMorthesettings.xml has beenremovedAdvise: moveaffectedprofilesintosettings.xml(Hint: mvn--settingssome/settings/file.xml)

24. Compatibility NotesStricter POM ValidationMore ErrorsMoreWarningsExplanationsbased on ExceptionsLinks to MavenWikihttps://cwiki.apache.org/confluence/display/MAVEN/Errors+and+Solutions

25. Compatibility NotesDependency Resolution fromLocalRepositorybuildscanonlyaccesslocallycachedartifactsiftheyhavethe proper repositoriesconfigured(Maven 3 keepstrack of artifactorigin)

26. Einschub: AetherA libraryforinteractingwithartifactrepositoriesLocal / remote RepositoriesWorkspacesTransportArtifact Resolution

27. Einschub: Maven benutzt Aether

28. Einschub: Aether – Ziele„Wewant to ensurethatprojectsbuildingwith SBT, Leinigen, Gradle, Buildr, Ant,or a homegrownsysteminteroperatereliablywithMavenrepositories.“Jason van Zyl, Aetherquestionsansweredfor JAX

29. Compatibility NotesClassPathIssuesMaven 3 usingAethercanresult in different classpathsWarning: mvndependency:treestill useslegacyresolutioncode!(Hint: usemvn--debug)

30. Compatibility NotesPluginRepositoriesBuildextensions, plugins and plugindependenciesareonlyresolvedfrom<pluginRepositories>(and no longerfrom<repositories>)

31. Compatibility NotesPlugin Version Resolutionautomaticpluginversionresolutionisscheduledfor removalTill then: latestreleaseversionisused,notlatestsnapshotversion

32. Compatibility NotesSnapshotDeploymentssnapshotartifacts will alwaysbedeployedusing a timestampedversion(<uniqueVersion>false</uniqueVersion> has no effect)

33. Compatibility NotesSite GenerationAll reportingrelatedcodehas beenremovedfromMavencoreThereforeonemustuseMaven Site Plugin 3.xSiehe https://cwiki.apache.org/MAVEN/maven-3x-and-site-plugin.html

34. Compatibility NotesConfiguration of reportingpluginspluginconfiguration in <reporting>no longeraffectsplugins in <build>(whenexecuting a pluginduringbuildlifecycleorfromcli,onlyconfigurationfrom<build>isconsidered)

35. PluginCompatibilityPluginCompatibility Matrixhttps://cwiki.apache.org/MAVEN/maven-3x-plugin-compatibility-matrix.htmlReporting PluginsCompatibility Matrixhttps://cwiki.apache.org/MAVEN/maven-3x-and-site-plugin.html

36. Maven Shellhttp://shell.sonatype.org/https://docs.sonatype.org/display/MVNSH/HomeCLI forMavenstandalone Java processkeepsPOMs in memoryforfasterbuildsreplacesmaven-cli-plugin

37. Performance

38. Performance: Parallel buildshttps://cwiki.apache.org/confluence/display/MAVEN/Parallel+builds+in+Maven+3Experimental Feature since 3.0 Beta 1mvn -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

39. Maven 3 und IDEsMajor Java IDEs allreadyinclude(someversion of) Maven 3Eclipse via m2eclipse, IntelliJ, NetBeansStill no supportby Oracle JDeveloper

40. Maven 3 und CI-SystemeHudsonNo supportforMaven 3 yet, voteforhttp://issues.hudson-ci.org/browse/HUDSON-4988WorkAround: Free Style ProjectsShell Command:export M2_HOME=/path/to/apache-maven-3.0-beta-3export M2=$M2_HOME/binexport PATH=$M2:$PATH cd someprojectmvn clean install

41. Maven 3 und CI-SystemeTeamcityNo Support in Teamcity 5Support announcedfor Teamcity 6

42. Maven 3 und SonarSonar 2.2 supportsMaven 3Butyouneed 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/

43. PolyglotMavenhttp://polyglot.sonatype.org/

44. Ausblickem2eclipse will move to eclipse.orgRelease of m2eclipse 1.0 „soon“Release of mvnsh „fairlysoon“newphase of work on PolyglotMavenOSGiruntime in futurerelease

45. Ausblicke: Maven 3.1POM format 4.1Global excludesVersionlessparentelementsMixinsNew settingssystemNew Plugin API

46. Ausblicke - Quellenhttp://java.profict.nl/presentaties/maven.pdfhttp://www.sonatype.com/people/↵⌫2010/10/maven-3-0-has-landed/http://www.infoq.com/news/2010/10/↵⌫maven-30-releasedSiehe auchhttps://sonatype.webex.com/sonatype/lsr.php?↵⌫AT=pb&SP=EC&rID=46805542&rKey=3f773d348b2df17b

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

48. Fragen und Antworten

49. KontaktStefan ScheidtSolution ArchitectOPITZ CONSULTING GmbHKirchstr. 6, 51647 GummersbachTel. +49 (2261) 6001 - 0stefan.scheidt@opitz-consulting.com