Friday, August 2, 2013

Good Bye Redeployment. spring-loaded, an Opensource Classreloader

Redeem yourself from hot deployments and OutOfMemoryException. spring-loaded is an opensource classreloader and a promising alternative to JRebel. It does not offer as many features as JRebel does, and it does not support any framework just yet. Nevertheless, its a great tool that can save the time you are waiting for that servletcontainer to restart again.

What it can do:
  • add/modify/delete methods/fields/constructors
  • modify annotations on types/methods/fields/constructors
  • add/remove/change values in enum types
What it cant:
  • support framework specific changes like Spring MVC @RequestMappings
  • change log configuration on the fly
It is not getting the attention that it deserves, so give it a try.

Just download from github already, and add the following to your JVM parameters:
java -javaagent:<pathTo>/springloaded-{VERSION}.jar -noverify


  1. Hi,

    I was experimenting with Spring Loaded and what I found out it that it also does not reload classes coming from other 'dependencies'. So if you have a maven multi module project Spring Loaded will not help you solve your reloading right now.

    Looks like an interesting project though!


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