Apache Maven is an open source build automation tool.
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JRebel
Score 8.0 out of 10
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JRebel is a build automation tool developed by Estonian company ZeroTurnaround, acquired by Rogue Wave Software in 2017, and then acquired (and now supported by) Perforce since that company's 2019 acquisition of Rogue Wave. The vendor says users of JRebel saves Java teams a month of coding time per year on average.
Building and automating packaging of software can be a challenging task. As the complexity of the project grows so do the dependencies on third-party artifacts. Using Maven we can define and manage the project structure centrally and it helps improve overall build times.
I recommend JRebel for Java developers, it will remove the time needed for redeployment, it will increase the focus on the task at hand (without being distracted by the redeployment) and will make them happier. I recommend JRebel for Java Development Managers, they should purchase this for their teams - it will increase productivity, decrease the product's time to market, and it will save money for the company. The ROI can be calculated upfront and presented to higher level management for approving this, if needed.
One of the issues with building software using Apache Maven is that its cache resolution is not optimal. It pulls down all the artifacts onto the developer's local machine and can sometimes result in conflicts.
The build process can vary in time and gets progressively longer as the project's complexity increases.
The overall usability of Apache Maven is very good to us. We were able to incorporate it into our company's build process pretty quickly. We deployed it to multiple teams throughout the entire enterprise. We got good feedback from our developers stating that Apache Maven has simplified their build process. It also allowed to to standardize the build process for the entire enterprise, thus ensure that each development team is using the same, consistent process to build code.
The performance of JRebel is great. It is enabling the Java team to do hot re-deployments and it has to be transparent and fast for the user, otherwise the whole purpose of reducing wasted time with re-deployments doesn't make sense. Also the User Interface for License Server management and analytics loads fast and the navigation through pages is quick.
I can't speak to the support, as I've never had issues. Apache Maven "just works," and errors were user errors or local nexus errors. Apache Maven is a great build/dependency management tool. I give it a 9/10 because occasionally the error message don't immediately indicate a solution...but again, those errors were always user or configuration errors, and the Maven documentation is extensive, so I don't find fault in Maven, but in its users.
Ant is useful if your build is heavily based on customs scripts running in the right order. Maven greatly simplifies the process to keep track of and download build dependencies compared with Apache Ant. If your build is based on multiple custom scripts running in a specific order there is a lot of overhead in Maven compared to Apache Ant.
Hot code swapping doesn't have many players...it's mainly JRebel. We use JRebel a lot in our backend code development where it minimizes our development cycle (20min down to 30sec). For Android, the competitor is Android Studio's Instant Run which works fairly well now. For smaller apps, Instant Run is faster deploying but needs more full builds. With JRebel, you hardly ever need to do a full build.
