Does Webby not then compete with m2e-wtp? I am having issues migrating my projects to m2e 1.0 with m2e-wtp 0.13 so this might skirt my issues. Seems weird that both would be produced by m2eclipse. I must be missing something.
Collin Peters 2011/7/18 Rafał Krzewski <[email protected]> > ** > Hello all, > > I wanted to share my experiences with running web applications with m2e-wtp > and Webby combined with JRebel [1] > JRebel is a tool that enhances JVM Hot Swap mechanism, so that most changes > can be applied dynamically to classes already loaded in memory. > It aims to fix the very common problem in J2EE application development - > unacceptably long time between introducing a change in the code and seeing > the result in a running application. > It is a commercial tool, but the price is reasonable and free licenses for > OSS projects are available. > > JRebel is available both as a standalone application that plugs into JVM > using javaagent mechanism, and as pulgins for Eclipse, IDEA and NetBeans. > > First, I've tried m2e-wtp + JRebel Eclipse plugin. The installation went > smoothly, and I was able to enable JRebel agent for the Tomcat server that I > used as the target for m2e-wtp assembled webapp. > I've run into a minor problem - disabling automatic publishing from WTP > server UI did not work, I had to edit server.xml by hand. This is probably > not related to neither m2e-wtp nor JRebel. > The application startup was considerably slower than without JRebel - I > expected that because classes had to be instrumented. Reloading changes in > the code worked as advertised, however build times after changing a single > Java source file were very noticeable - about 5s. This certainly depends on > the speed of the machine and size of the application, so your mileage may > vary. > > Then I decided to try JRebel with Webby. I've uninstalled m2e-wtp (and most > WTP also) and installed Webby. Of course Webby run configuration editor does > not have JRebel tab, but I'm sure one could be added as an optional > extension if there's interest from the community. > Fortunately standalone JRebel can be plugged in very easily. In the JRE / > VM arguments for a Webby launch configuration, I've added the following: > > -javaagent:${env_var:JREBEL_HOME}/jrebel.jar > -Dworkspace.root=${workspace_loc} > > This way I could share the configuration with other people on my team. > workspace.root system property is used in rebel.xml configuration file, that > specifies the filesystem location of the classes that need to be monitored > and reloaded on demand by JRebel. > I've placed this file in src/main/resources folder in my top level webapp > module and it looks like this: > > <?xml version="1.0" encoding="UTF-8"?> > <application > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";<http://www.w3.org/2001/XMLSchema-instance> > xmlns="http://www.zeroturnaround.com"; <http://www.zeroturnaround.com> > xsi:schemaLocation="http://www.zeroturnaround.com > http://www.zeroturnaround.com/alderaan/rebel-2_0.xsd";<http://www.zeroturnaround.comhttp://www.zeroturnaround.com/alderaan/rebel-2_0.xsd> > > > <classpath> > <dir name="${workspace.root}/coral-api/target/classes"/> > <dir name="${workspace.root}/coral-browser/target/classes"/> > ... > </classpath> > </application> > > I am not using any <web> tags, because Webby takes care of providing the > J2EE container with up to date resource files. > > With this configuration I was able to achieve reasonable startup time - > Webby is really much faster than WTP, and also excellent build times - below > 1s. Everything worked very smoothly. I was able to code and see the results > with barely any latency at all! Compared to m2e 0.12 + WTP the boost is > incredible :) > > cheers, > Rafał > > [1] http://www.zeroturnaround.com/jrebel/ > > _______________________________________________ > m2e-users mailing list > [email protected] > https://dev.eclipse.org/mailman/listinfo/m2e-users > >
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