DZone
Thanks for visiting DZone today,
Edit Profile
  • Manage Email Subscriptions
  • How to Post to DZone
  • Article Submission Guidelines
Sign Out View Profile
  • Post an Article
  • Manage My Drafts
Over 2 million developers have joined DZone.
Log In / Join
Refcards Trend Reports
Events Video Library
Over 2 million developers have joined DZone. Join Today! Thanks for visiting DZone today,
Edit Profile Manage Email Subscriptions Moderation Admin Console How to Post to DZone Article Submission Guidelines
View Profile
Sign Out
Refcards
Trend Reports
Events
View Events Video Library
Zones
Culture and Methodologies Agile Career Development Methodologies Team Management
Data Engineering AI/ML Big Data Data Databases IoT
Software Design and Architecture Cloud Architecture Containers Integration Microservices Performance Security
Coding Frameworks Java JavaScript Languages Tools
Testing, Deployment, and Maintenance Deployment DevOps and CI/CD Maintenance Monitoring and Observability Testing, Tools, and Frameworks
Culture and Methodologies
Agile Career Development Methodologies Team Management
Data Engineering
AI/ML Big Data Data Databases IoT
Software Design and Architecture
Cloud Architecture Containers Integration Microservices Performance Security
Coding
Frameworks Java JavaScript Languages Tools
Testing, Deployment, and Maintenance
Deployment DevOps and CI/CD Maintenance Monitoring and Observability Testing, Tools, and Frameworks

Migrate, Modernize and Build Java Web Apps on Azure: This live workshop will cover methods to enhance Java application development workflow.

Modern Digital Website Security: Prepare to face any form of malicious web activity and enable your sites to optimally serve your customers.

Kubernetes in the Enterprise: The latest expert insights on scaling, serverless, Kubernetes-powered AI, cluster security, FinOps, and more.

A Guide to Continuous Integration and Deployment: Learn the fundamentals and understand the use of CI/CD in your apps.

Related

  • A Maven Story
  • Querydsl vs. JPA Criteria, Part 5: Maven Integration
  • How To Deploy Helidon Application to Kubernetes With Kubernetes Maven Plugin
  • Deploy MuleSoft App to CloudHub2 Using GitHub Actions CI/CD Pipeline

Trending

  • You’re Wasting Time With Your Daily Standup
  • Advanced Content Prioritization Techniques for Web Developers
  • How to Integrate Istio and SPIRE for Secure Workload Identity
  • How to Handle Secrets in Helm
  1. DZone
  2. Coding
  3. Java
  4. Embedding Maven

Embedding Maven

Bozhidar Bozhanov user avatar by
Bozhidar Bozhanov
·
Nov. 13, 13 · Interview
Like (2)
Save
Tweet
Share
16.1K Views

Join the DZone community and get the full member experience.

Join For Free
It is a very rare usecase, but sometimes you need it. How to embed Maven in your application, so that you can programatically run goals?

Short answer is: it's tricky. I dabbled into the matter for my java webapp automatic syncing project, and at some point I decided not to embed it. Ultimately, I used a library that does what I needed, but anyway, here are the steps and tools that might be helpful.

What you usually need the embedded maven for, is to execute some goals on a maven project. There are two scenarios.

The first one is, if you are running inside the maven container, i.e. you are writing a mojo/plugin. Then it's fairly easy, because you have everything managed by the already-initialized plexus container. In that case you can use the mojo-executor. Easy to use, but expects a "project", "pluginManager" and "session", which you can't easily obtain.

The second scenario is completely embedded maven. There is a library that does what I needed it to do (thanks to MariuszS for pointing it out) - it's Maven Embedder. Its usage is described in this SO question. Use both the first and the second answer.

Before finding that library, I tried two more libraries: the jenkins maven embedded and the Maven Invoker. The problem in both libraries is: they need a maven home. That is, the path to where a maven installation resides. Which is kind of contrary to the idea of "embedded" maven. If the Maven Embedder suits you, you can stop reading. However, there might be cases where the Maven Embedder might not be what you are looking for. In that case, you should use one of the two aforementioned libraries. So, how to find and set a maven home?

  • Ask the user to specify it. Not too much of a hassle, probably
  • Use M2_HOME. One of the libraries uses that by default, but the problem is it might not be set. I don't usually set it, for example. If it is not, you can fallback to the previous approach
  • Scan the entire file system for a maven installation - sounds ok, and it can be done only once, and then stored in some entry. The problem is - there might not be a maven installation. Even if it's a developer's machine - IDEs (Eclipse, at least) have an "embedded" maven. And while it probably stores it somewhere internally in the same format a manual installation would, it may change it's path or structure depending on the version. You can, of course, re-scan the file tree every once in a while to find such an installation
  • Download Maven programatically yourself. Then you can be sure where it is located and that it will always be located there in the same format. The problem here is version mismatch - the user might be using another version of maven. Making the version configurable is an option.
All of these work in some cases, and don't work in others.

So, in order of preference: 1. make sure you really need to embed maven 2. use the Maven Embedder 3. use another option with its considerations
Apache Maven

Published at DZone with permission of Bozhidar Bozhanov, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.

Related

  • A Maven Story
  • Querydsl vs. JPA Criteria, Part 5: Maven Integration
  • How To Deploy Helidon Application to Kubernetes With Kubernetes Maven Plugin
  • Deploy MuleSoft App to CloudHub2 Using GitHub Actions CI/CD Pipeline

Comments

Partner Resources

X

ABOUT US

  • About DZone
  • Send feedback
  • Careers
  • Sitemap

ADVERTISE

  • Advertise with DZone

CONTRIBUTE ON DZONE

  • Article Submission Guidelines
  • Become a Contributor
  • Core Program
  • Visit the Writers' Zone

LEGAL

  • Terms of Service
  • Privacy Policy

CONTACT US

  • 3343 Perimeter Hill Drive
  • Suite 100
  • Nashville, TN 37211
  • support@dzone.com

Let's be friends: