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How maven makes your development group look like a bunch of professionals.
Maven is a build tool that provides a uniform build system with guidelines for best practices. It uses a Project Object Model (POM) XML file to define project information, relationships, and build settings. Maven projects have a default directory structure and life cycle made up of phases and goals. It supports multi-module projects to organize builds. Maven uses a local then remote repository to resolve dependencies. Artifactory is a repository that can host internal libraries. A complete build solution integrates Maven, source control, continuous integration, repositories, and code quality tools.
How maven makes your development group look like a bunch of professionals.
- 1. Venkaiah Chowdary Koneru Fazreil Amreen Abdul Jalil
- 2. Agenda • Maven • Repository •Complete Build solution
- 3. What’s the Problem? •Manual handling of external Jars • Inter-project dependencies • Running tests
- 4. What is Maven? • A build tool • Uniform build system • Provides quality project information • Transparent migration to new features • Guidelines for best practices development
- 5. Conceptual Model • Mavenmaintains model of a project • Unique set of coordinates to a project • Almost zero effort • Encourages modular design
- 6. Default Directory Structure Structure is based on the archetypes definition Source folders Test related Source folders Generated class files and artifacts
- 7. POM • Fundamental unitof work in maven • An XML file • Consists – Project information – Project relationships – Build settings – Build environment
- 8. POM <project ...> <parent /> <groupId /> • Fundamental unit of work in maven <artifactId /> <version /> <packaging /> <modules> … </modules> • An XML file <propertie> ... </properties> <developers /> <contributors /> <scm> ... </scm> • Consists <build> <plugins> ... </plugins> – Project information </build> <dependencies> ... </dependencies> – Project relationships </repositories> <repositories> ... <pluginRepositories> ... </pluginRepositories> – Build settings ... </profiles> <profiles> <reporting> ... </reporting> – Build environment </project>
- 9. POM • Convention overConfiguration • Maven incorporates this by providing default behavior for projects <project> <modelVersion>4.0.0</modelVersion> <groupId>my.fazreil.projects</groupId> <artifactId>fireglass</artifactId> <version>0.0.1</version> </project> Just put your sources in the correct directory
- 10. Life Cycle • Containsphases in specific order • Phase is made up of goals • 3 built-in life cycles – default – clean and – test
- 11. Life Cycle -Default validate initialize test- compile test package compile deploy install
- 12. Multi-Module Projects • Whyuse a modular architecture ? – Separation of concerns – Easier to test – Flexible • Reusing the configuration – Inheritance – Dependencies • Aggregation
- 13. Multi-Module Projects Organization or team wide properties archetype Project wide properties Project Aggregation module1 module2 Module specific properties
- 14. Multi-Module Projects • Organizeyour builds • Speed up builds • Speedup test process
- 15. Maven Repository • Holdsthe build artifacts and dependencies • Two types of repositories – Local – Remote
- 16. Local Repository • Localcache for artifacts • Can erase it completely • Useful for offline builds • Resides in User home’s .m2/ folder
- 17. Remote Repository • Centralrepository to host all artifacts • Local repository downloads from the central repository hosted @ maven.org Local Repository Search order (.m2repository) Remote repository (http://repo1.maven.org/maven2)
- 18. Internal Repository • Corporaterepository • Proxy for remote repositories Local Repository (.m2repository) Search order Internal Proxy (http://{repository url}) Remote repository (http://repo1.maven.org/maven2)
- 19. What is Artifactory? •It is a MAVEN repository • Think of it as the ‘SVN’ for libraries. • It is the place to obtain this information: <dependency> <groupId>my.fazreil.project</groupId> <artifactId>fireglass</artifactId> <version>0.0.1</version> </dependency>
- 20. Do we needour own maven repo? • Because we want to host our own libraries. • And we would like to make our libraries available to the local network • Yes, we can control the access.
- 21. Extra notes • Artifactoryacts as a proxy to the outside repository. • Dependencies requested to Artifactory will be cached in Artifactory for quick retrieval.
- 22. Build solution • Completeend-to-end solution • 5 open source projects – Maven – Subversion – Hudson – Artifactory – Sonar
- 23. Ecosystem • A typicalmaven project ecosystem Distribute artifacts Publish artifacts Source code Automated builds metrics changes
- 24. Maven Release Cycle •Develop against snapshot versions • Release stable versions • Automated releases – Update version numbers to next SNAPSHOT versions
Editor's Notes
- #2 Teaming as a way of life!!
- #3 Maven IntroductionWhat is maven ?why ?Maven vs AntBasicsDependenciesMaven customizationIDE integrationMulti-module projects - creating multi module projects - naming conventions - Group id, artifact id
- #4 External jarsWhere to store themWhat versionDependency on other jarsRunning test - developers don’t have time or forget tests before commit
- #5 Majorityof the maven users call maven as a “build tool” – A tool used to build deployable artifacts from source code.Build tool such as Ant is focused solely on preprocessing, compilation, packaging, testing and distribution.Uniform build system (POM)this definition of a model for every project enables features such asDependency managementRemote repositoriesUniversal reuse of build logicTool portability / integrationLife CycleCompiling source codeExecuting test casesPackaging distributionAnd many others
- #6 Model – Provides default behavior for projectsZERO effortPut sources in source directoryDefine relationships between modulesModularDefine the relationship between modulesInherit properties and behavior from parent projectsOrganize build with multi-module projects
- #7 Archetype is a Maven project templating toolkit.An archetype is defined as an original pattern or model from which all other things of the same kind are made.
- #8 POMIt is what makes your project a maven project
- #9 POMIt is what makes your project a maven project
- #10 Convention over configurationSystems, libraries, and frameworks should assume reasonable defaults.Source, resources, test, classes and etc…Defined life cycle and a set of common pluginsSet of common plugin’s knows how to build and assemble the software …
- #11 Maven 2.0 is based around the central concept of a build lifecycle. What this means is that the process for building and distributing a particular artifact (project) is clearly defined.Phase represents a specific stageGoal represents a specific taskDefault : handles your project deploymentClean: project cleaningSite: project’s site documentation
- #13 WHY?Separation of concernsEasier to testFlexibleDependenciesDefine the relationships between modules InheritanceInherit properties and behaviour from parent projectsAggregationOrganize builds with multi-module projects
- #14 Inheritance in actionSuper POM is always the base parent like Object in java
- #15 Organize : - coordinates builds and stage build process (build pipelines)Test process:Not only unit tests.Integration test, parallelize long running integration tests
- #16 Why not store JAR’s in CVS ?Maven tries to promote the notion of a user local repository where JARs, or any project artifacts, can be stored and used for any number of builds.Uses less storageMakes checking of a project quicker
- #20 It is a MAVEN repositoryThink of it as the ‘SVN’ for libraries.It is the place to obtain this information:<dependency> <groupId>my.mimos.util</groupId> <artifactId>dbutil</artifactId> <version>0.1</version></dependency>
- #21 Because we want to host our own libraries.And we would like to make our libraries available to the whole MIMOS networkYes, we can control the access.
- #22 Artifactory acts as a proxy to the outside repository.Dependencies requested to Artifactory will be cached in Artifactory for quick retrieval.Log in using MIMOS AD Login.
- #23 Maven:Describe project, generate artifacts, artifact versioningSubversion:To collectively own code and integrate often, source code repository is necessaryCI server:After check-in, a CI server will check the code out, compile and run all the unit tests.Artifactory:It enables both release and snapshot artifacts. It is valuable to keep metrics about source code (code quality).
- #25 To automate, needMaven release plugin and scm details in POM xmlEach release produces a new time-stamped artifactSnapshot versions are identified by the SNAPSHOT keywordStable, tested releaseEach artifact is unique