4/11/2023 0 Comments Jrebel maven jetty"The debugger does not support Hot Fix action. When ever I switch to a class from my project I get an error dialog: This leads to continous context switches to the breakpoint during my development. For some reason I get breakspoint hits "at exception breakpoint ". I have a maven web project which I launch through Netbeans on Tomcat. Runtime: Java(TM) SE Runtime Environment 1.7.0_25-b15 This was something I was already doing in JBoss.Product Version: NetBeans IDE Dev (Build 201308032300) I did have to update my MAVEN_OPTS environment variable to increase Java's PermGenSpace since jetty reloads the WAR each time and you'll quickly run out of memory. Again, I think this could be further improved by using JRebel. Using the jetty plugin this now takes around 30 seconds. Previously, it took 1-2 minutes and sometimes more to rebuild the war and hotdeploy to JBoss. Overall I am happy with the results so far. This is because by default I set the scan interval to 0 and jetty.reload to manual, so I can batch up multiple changes before reloading. Click back to the terminal running jetty and hit the ENTER key.Which in my case is /target/myapp/WEB-INF/classes Run " mvn compile war:exploded" in a separate terminal to compile your changes and copy the new class files to the location Jersey expects to find them.Running install was necessary because I reference the exploded WAR directory under target in the jetty configuration. mvn install jetty:run - this will first build the WAR and then start jetty while also deploying the WAR.Here are the steps involved to start jetty and redeploy changes: Most "normal" non-Jersey applications don't need all of this, but it was necessary to get our legacy WAR working with jetty. My pom.xml and jetty.xml files are below. So I had to do some slight modifications to get it to work without that being declared. This example didn't work for me because for some insane reason the init-param, ., does not work in WebSphere. Here is a good posting by my co-worker Jeff Black " Jersey.Jetty and Maven style!". The application we are testing is a WAR containing REST Services built with Jersey (JAX-RS). My first prototype uses the maven-jetty-plugin version 6. End the end I think the best solution will be a combination of JBoss+JRebel. The downside is each change requires jetty to hotdeploy the new WAR. ![]() The nice thing about jetty is it's easy to use from maven and we could use it in our CI environment to possibly reduce our build times and provide quicker feedback. First up, I am going to explain how I got the maven jetty plugin to work with our REST Services WAR and the steps necessary to redeploy changes. ![]() I haven't really done much hardcore java development in awhile, but in order to improve my team's productivity, I am going to be exploring best practices the next couple of months concerning this area. Of all the solutions I think JRebel provides the best chance for success that solves any environment no matter the web container or developers IDE of choice. On the other hand, Java Developers have to figure out how to best accomplish this, and every situation seems to be different: JBoss, Weblogic, Eclipse, Idea, Netbeans, Jetty, JRebel. Developers using python, php, rails, or grails really don't even have to spend a second trying to solve this problem. Let me first say that I think, IMHO, Java Developers are at a disadvantage when it comes to rapidly developing web applications with a static language. Two years ago I wrote an article " No more J2EE Apps" and I received a lot of great feedback. ![]() In fact, I'd be embarrassed if Google Buzz made it public knowledge without my consent. Ever wonder how much time is wasted by Java developers rebuilding and redeploying web applications? For me alone I can't imagine it.
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