Maven 3 New Features
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Maven 3 introduced several new features including internal modularization, stricter POM validation, and compatibility with other build tools through Aether. It also improved performance by enabling parallel builds and introduced Maven Shell. While many IDEs and Continuous Integration systems now support Maven 3, some upgrades were needed. Future releases will continue improving the POM format and plugin system. Maven 3 represents an important step forward for the build tool.
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Maven 3 New Features
- 1. Stefan ScheidtSolution ArchitectOPITZ CONSULTING GmbHMaven 3 New Features
- 2. Wer bin ich?Software-Entwickler und ArchitektTrainer und CoachAutor und Sprecher
- 3. Wer ist OPITZ CONSULTING?Last Minute:Offizieller OC 1 SeiterVon TomIhr Projektspezialist für Java, SOA und Oracle
- 6. Was ist Maven?Ein deklarativesBuild-SystemConvention overConfigurationWiederverwendung durch PluginsDependency ManagementEin Tool für technisches Projekt-Reportingein „Software Project Management Tool“
- 7. 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
- 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 / OktoberQuelle: http://archive.apache.org/dist/maven/binaries/
- 9. Primäre Ziele für Maven 3.0Refactoring der Code BaseInterne Modularisierung
- 11. Primäres AnliegenBackwardCompatibilityDafür viele IntegrationstestsSiehehttps://grid.sonatype.org/ci/view/Maven/job/maven-3.0.x-ITs/
- 12. 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)
- 13. Compatibility NotesStricter POM ValidationMore ErrorsMoreWarningsExplanationsbased on ExceptionsLinks to MavenWikihttps://cwiki.apache.org/confluence/display/MAVEN/Errors+and+Solutions
- 14. Compatibility NotesDependency Resolution fromLocalRepositorybuildscanonlyaccesslocallycachedartifactsiftheyhavethe proper repositoriesconfigured(Maven 3 keepstrack of artifactorigin)
- 15. Einschub: AetherA libraryforinteractingwithartifactrepositoriesLocal / RemoteRepositoriesWorkspacesTransportArtifact Resolution
- 16. Einschub: Maven benutzt Aether
- 17. Einschub: Aether – Ziele„Wewant to ensurethatprojectsbuildingwith SBT, Leinigen, Gradle, Buildr, Ant,or a homegrownsysteminteroperatereliablywithMavenrepositories.“Jason van Zyl, Aetherquestionsansweredfor JAX
- 18. Compatibility NotesClassPathIssuesMaven 3 usingAethercanresult in different classpathsWarning: mvndependency:treestill useslegacyresolutioncode!(Hint: usemvn--debug)
- 19. Compatibility NotesPluginRepositoriesBuildextensions, plugins and plugindependenciesareonlyresolvedfrom<pluginRepositories>(and no longerfrom<repositories>)
- 20. Compatibility NotesPlugin Version Resolutionautomaticpluginversionresolutionisscheduledfor removalTill then: latestreleaseversionisused,notlatestsnapshotversion
- 21. Compatibility NotesSnapshotDeploymentssnapshotartifacts will alwaysbedeployedusing a timestampedversion(<uniqueVersion>false</uniqueVersion> has no effect)
- 22. Compatibility NotesSite GenerationAll reportingrelatedcodehas beenremovedfromMavencoreThereforeonemustuseMaven Site Plugin 3.xSiehe https://cwiki.apache.org/MAVEN/maven-3x-and-site-plugin.html
- 23. Compatibility NotesConfiguration of reportingpluginspluginconfiguration in <reporting>no longeraffectsplugins in <build>(whenexecuting a pluginduringbuildlifecycleorfromcli,onlyconfigurationfrom<build>isconsidered)
- 24. PluginCompatibilityPluginCompatibility Matrixhttps://cwiki.apache.org/MAVEN/maven-3x-plugin-compatibility-matrix.htmlReporting PluginsCompatibility Matrixhttps://cwiki.apache.org/MAVEN/maven-3x-and-site-plugin.html
- 25. Maven Shellhttp://shell.sonatype.org/https://docs.sonatype.org/display/MVNSH/HomeCLI forMavenstandalone Java processkeepsPOMs in memoryforfasterbuildsreplacesmaven-cli-plugin
- 26. Performance
- 27. 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
- 28. Maven 3 und IDEsMajor Java IDEs allreadyinclude(someversion of) Maven 3Eclipse via m2eclipse, IntelliJ, NetBeansStill no supportby Oracle JDeveloper
- 29. 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
- 30. Maven 3 und CI-SystemeTeamcityNo Support in Teamcity 5Support announcedfor Teamcity 6
- 31. 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/
- 33. Ausblickem2eclipse will move to eclipse.orgRelease of m2eclipse 1.0 „soon“Release of mvnsh „fairlysoon“newphase of work on PolyglotMavenOSGiruntime in futurerelease
- 34. Ausblicke: Maven 3.1POM format 4.1Global excludesVersionlessparentelementsMixinsNew settingssystemNew Plugin API
- 35. 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
- 36. Fazit„Weseethis as a newbeginningforMaven“Jason van Zyl
- 38. KontaktStefan ScheidtSolution ArchitectOPITZ CONSULTING GmbHKirchstr. 6, 51647 GummersbachTel. +49 (2261) 6001 - [email protected]