Stefan Scheidt Solution Architect OPITZ CONSULTING GmbH Maven 3 New Features
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Was ist Maven? Ein deklarativesBuild-System Convention overConfiguration Wiederverwendung durch Plugins Dependency Management Ein Tool fr technisches Projekt-Reporting ein Software Project Management Tool
Was ist Maven? Ein Open-Source-Projekt bei Apache Ziel: Vereinheitlichen von Build, Verteilung, Projekt-Webseite Zweck: Dontrepeatyourself! Siehe auch http://maven.apache.org/what-is-maven.html
Release-Historie 1.0 Beta2003 1.02004 / Juli 2.0 Alpha2005 / April 2.0 Beta2005 / September 2.02005 / Oktober 3.0 Alpha2009 / Februar 3.0 Beta 2010 / April 3.02010 / Oktober Quelle: http://archive.apache.org/dist/maven/binaries/
Primre Ziele fr Maven 3.0 Refactoring der Code Base Interne Modularisierung
Primres Anliegen BackwardCompatibility Dafr viele Integrationstests Siehehttps://grid.sonatype.org/ci/view/Maven/job/maven-3.0.x-ITs/
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)
Compatibility Notes Stricter POM Validation More Errors MoreWarnings Explanationsbased on Exceptions Links to MavenWiki https://cwiki.apache.org/confluence/display/MAVEN/Errors+and+Solutions
Einschub: Aether A libraryforinteractingwith artifactrepositories Local / RemoteRepositories Workspaces Transport Artifact Resolution
Einschub: Maven benutzt Aether
Einschub: Aether Ziele Wewant to ensurethatprojectsbuilding with SBT, Leinigen, Gradle, Buildr, Ant, or a homegrownsysteminteroperate reliablywithMavenrepositories. Jason van Zyl, Aetherquestionsansweredfor JAX
Compatibility Notes ClassPathIssues Maven 3 usingAether canresult in different classpaths Warning: mvndependency:tree still useslegacyresolutioncode! (Hint: usemvn--debug)
Compatibility Notes PluginRepositories Buildextensions, plugins and plugindependenciesareonlyresolvedfrom (and no longerfrom)
Compatibility Notes Plugin Version Resolution automaticpluginversionresolution isscheduledfor removal Till then: latestreleaseversionisused, notlatestsnapshotversion
Compatibility Notes SnapshotDeployments snapshotartifacts will alwaysbedeployed using a timestampedversion (false has no effect)
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
Compatibility Notes Configuration of reportingplugins pluginconfiguration in no longeraffectsplugins in (whenexecuting a pluginduringbuildlifecycleorfromcli, onlyconfigurationfromisconsidered)
Maven Shell http://shell.sonatype.org/ https://docs.sonatype.org/display/MVNSH/Home CLI forMaven standalone Java process keepsPOMs in memoryforfasterbuilds replacesmaven-cli-plugin
Performance
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
Maven 3 und IDEs Major Java IDEs allreadyinclude (someversion of) Maven 3 Eclipse via m2eclipse, IntelliJ, NetBeans Still no supportby Oracle JDeveloper
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
Maven 3 und CI-Systeme Teamcity No Support in Teamcity 5 Support announcedfor Teamcity 6
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/
PolyglotMaven http://polyglot.sonatype.org/
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
Ausblicke: Maven 3.1 POM format 4.1 Global excludes Versionlessparentelements Mixins New settingssystem New Plugin API
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
Fazit Weseethis as a newbeginningforMaven Jason van Zyl
Fragen und Antworten
Kontakt Stefan Scheidt Solution Architect OPITZ CONSULTING GmbHKirchstr. 6, 51647 GummersbachTel. +49 (2261) 6001 - 0stefan.scheidt@opitz-consulting.com
