Hot deploy on JBoss - how do I make JBoss see the change

Question

I am developing a Java EE application that I deploy over and over again on a local JBoss installation during development  I want to speed up the build by hot deploying my application straight into  JBOSS  server default deploy myApp  It seems to work - but there also seems to be a somewhat arbitrary delay between the hard deploy and when JBoss starts using the new classes  I am not very familiar with JBoss  but I assume it caches classes  and that this is what causes the problem    Am I correct  and if so  how do I make JBoss flush it s cache

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I have had the same problem  but think I ve got it under control now   Are you using eclipse or command line or     When I use the command line  I think I did  seam clean  or  seam undeploy  or maybe even  seam restart  followed by  seam explode     I probably tried all of these at one time or another never bothering to look up what each one does     The idea is to remove the deployed war file from TWO places  1   JBOSS HOME server default deploy 2   PROJECT HOME exploded archives   I m pretty sure  seam undeploy  removes the 1st and  seam clean  removes the 2nd   When I use eclipse  I use the free one   I first turn off  Project Build Automatically  Then when I am ready to deploy I do either Project Build Project or Project Build All depending on what I ve changed   When I change xhtml  Build Project is sufficient   When I change java source Build All works   It s possible these do the same things and the difference is in my imagination  but some combination of this stuff will work for you   You have to watch the output though  Occasionally the app does not get cleaned or undeployed   This would result in not seeing your change  Sometimes I shut down the server first and then rebuild clean deploy the project   Hope this helps   TDR

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Actually my problem was that the command line mvn utility wouldn t see the changes for some reason  I turned on the Auto-deploy in the Deployment Scanner and there was still no difference  HOWEVER    I was twiddling around with the Eclipse environment and because I had added a JBoss server for it s Servers window I discovered I had the ability to  Add or Remove     modules in my workspace  Once the project was added whenever I made a change to code the code change was detected by the Deployment Scanner and JBoss went thru the cycle of updating code    Works like a charm   Here are the steps necessary to set this up   First if you haven t done so add your JBoss Server to your Eclipse using File- New- Other- Server then go thru the motions of adding your JBoss AS 7 server  Being sure to locate the directory that you are using   Once added  look down near the bottom of Eclipse to the  Servers  tab  You should see your JBoss server  Highlight it and look for  Add or Remove      From there you should see your project    Once added  make a small change to your code and watch JBoss go to town hot deploying for you

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Use Ant script and make target deploy   The deploy target should    Stop JBoss Copy the ear or war to the deploy directory Start JBoss       No caching   also no out of memory issues after subsequent deploys during testing

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I am using JBoss AS 7 1 1 Final  Adding following code snippet in my web xml helped me to change jsp files on the fly     lt servlet gt       lt servlet-name gt jsp lt  servlet-name gt       lt servlet-class gt org apache jasper servlet JspServlet lt  servlet-class gt       lt init-param gt           lt param-name gt development lt  param-name gt           lt param-value gt true lt  param-value gt       lt  init-param gt       lt load-on-startup gt 3 lt  load-on-startup gt   lt  servlet gt    Hope this helps

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Found the solution on this link   What to do     configure exploded war artifact to have extension  war   deploy exploded artifact to WildFly or Jboss configure IntelliJ to Update Resources on Update Action   When I modify a page  web   I update and when I refresh web browser  is all there with my mod  I did configured Jboss for autoscanning  not sure it did helped

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I ve been developing a project with Eclipse and Wildfly and the exploded EAR file was getting big due to deploying of all the 3rd party libraries I needed in the application   I was pointing the deployment to my Maven repository which I guess was recopying the jars each time  So redeploying the application when ever I changed Java code in the service layer was turning into a nightmare    Then having turned to Hotswap agent this helped a lot as far as seeing changes to EJB code without redeploying the application   However I have recently upgraded to Wildfly 10  Java 8 and JBoss Developer Studio 10 and during that process I took the time to move all my 3rd party application jars e g  primefaces into Wildfly modules and I removed my Maven repo from my deployment config   Now redeploying the entire application which is a pretty big one via Eclipse takes just a few seconds and it is much much faster than before  I don t even feel the need to install Hotswap and don t want to risk it anyway right now    So if you are building under Eclipse with Wildfly then keep you application clear of 3rd party libs using Wildfly Modules and you ll be much better off

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I had the same problem in my bundle   Eclipse IDE   JBoss server adapter    JBoss AS 7 0 1  community project    My solution is very simple - you should go to JBoss administrative panel  by default localhost 9990   there in profile settings open Core - Deployment Scanners  Turn on Autodeploy-Exploded  set to true   and by your wishes you can set scanner time  by default 5000 ms  to appropriate for your  I set to 2000  for more fast incremental publish in Eclipse when I make changes to projects   That s it  Now JBoss makes HOT deploy not only for HTML  JSF  XHTML and so on  files  but also takes care of POJO classes  beans and so on  files

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This worked for me in Eclipse Mars with WildFly 11  Double-click on WildFly server under Servers to open the configuration page  In the Overview tab -  Publishing  choose  Automatically publish when resources change  and set the interval to 1  Next  Overview tab -  Application Reload Behavior  uncheck the use default pattern and set the pattern to   jar    class   In the Deployment tab  uncheck Deploy project as compressed archives  Hope this helps

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Deploy the app as exploded  project war folder   add in your web xml    lt web-app gt       lt context-param gt           lt param-name gt org jboss weld development lt  param-name gt           lt param-value gt true lt  param-value gt       lt  context-param gt    Update the web xml time every-time you deploy  append blank line    set PRJ HOME C  Temp2 MyProject src main webapp set PRJ CLSS HOME  PRJ HOME  WEB-INF classes com myProject  set JBOSS HOME  C  Java jboss-4 2 3 GA-jdk6 server default deploy MyProject war set JBOSS CLSS HOME   JBOSS HOME  WEB-INF classes com myProject  copy  PRJ CLSS HOME  frontend actions profile ProfileAction class  JBOSS CLSS HOME  frontend actions profile ProfileAction class copy  PRJ CLSS HOME  frontend actions profile AjaxAction class  JBOSS CLSS HOME  frontend actions profile AjaxAction class  ECHO  gt  gt  JBOSS HOME  WEB-INF web xml

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Hot deployment is stable only for changes on static parts of the application  jsf  xhtml  etc     Here is a working solution  according to JBoss AS 7 1 1 Final   Build your project Navigate to  JBOSS HOME  standalone tmp vfs Open the most recently modified folder named  deployment some alphanumeric values    i e   deployment344b1c870c8edbd  Navigate to the specific view that you want to edit  usually  this is included into the packaged  war folder  and open it with a text editor  i e  Notepad    Make the changes you want and save the file Refresh the respective page on your browser  The changes should be visible now   When finished  don t forget to copy these changes to your actual development environment  rebuild and redeploy

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Solution for Netbeans 8 02 and 8 1 IDE and JBOSS EAP 6 4    From the services tab of Netbeans  add JBOSS server to your  servers  node  If you are using MAVEN  netbeans compiles files and maven copies files to   target directory  You need to create a symbolic link from   target to JBOSS HOME standalone deployments  Under windows  an example command would be  cd  JBOSS HOME  standalone deployments mklink  d MyWebApplication war  PROJECTS HOME  MyWebApplication target MyWebApplication-1 0 0  The above creates a symbolic link from  JBOSS HOME  standalone deployments MyWebApplication war to  target MyWebApplication-1 0 0 which is where maven transfers all files after compilation  or after a jsp  html or any other file changes  Last think to do is to create a CentralManagement war dodeploy file in   JBOSS HOME  standalone deployments   This file will tell JBOSS to deploy the war  file  as a web application

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Start the server in debug mode and It will track changes inside methods  Other changes It will ask to restart the module

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You should try JRebel  which does the hot deploy stuff pretty well  A bit expensive  but worth the money  They have a trial version

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Just my two cents    Cold deployment is the way of deploying an application when you stop it  or stop the whole server   then you install the new version  and finally restart the application  or start the whole server   It s suitable for official production deployments  but it would be horrible slow to do this during development  Forget about rapid development if you are doing this  Auto deployment is the ability the server has to re-scan periodically for a new EAR WAR and deploy it automagically behind the scenes for you  or for the IDE  Eclipse  to deploy automagically the whole application when you make changes to the source code  JBoss does this  but JBoss s marketing department call this misleadingly  hot deployment   An auto deployment is not as slow compared to a cold deployment  but is really slow compared to a hot deployment  Hot deployment is the ability to deploy behind the scenes  as you type   No need to redeploy the whole application when you make changes  Hot deployment ONLY deploys the changes  You change a Java source code  and voila  it s running already  You never noticed it was deploying it  JBoss cannot do this  unless you buy for JRebel  or similar  but this is too much    for me  I m cheap     Now my  sales pitch   D  What about using Tomcat during development  Comes with hot deployment all day long    for free  I do that all the time during development and then I deploy on WebSphere  JBoss  or Weblogic  Don t get me wrong  these three are great for production  but are really AWFUL for rapid-development on your local machine  Development productivity goes down the drain if you use these three all day long   In my experience  I stopped using WebSphere  JBoss  and Weblogic for rapid development  I still have them installed in my local environment  though  but only for the occasional test I may need to run  I don t pay for JRebel all the while I get awesome development speed  Did I mention Tomcat is fully compatible with JBoss   Tomcat is free and not only has auto-deployment  but also REAL hot deployment  Java code  JSP  JSF  XHTML  as you type in Eclipse  Yes  you read well   MYKong has a page  https   www mkyong com eclipse how-to-configure-hot-deploy-in-eclipse   with details on how to set it up   Did you like my sales pitch    Cheers

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Unfortunately  it s not that easy  There are more complicated things behind the scenes in JBoss  most of them ClassLoader related  that will prevent you from HOT-DEPLOYING your application   For example  you are not going to be able to HOT-DEPLOY if some of your classes signatures change   So far  using MyEclipse IDE  a paid distribution of Eclipse  is the only thing I found that does hot deploying quite successfully  Not 100  accuracy though  But certainly better than JBoss Tools  Netbeans or any other Eclipse based solution   I ve been looking for free tools to accomplish what you ve just described by asking people in StackOverflow if you want to take a look

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In case you are working with the Eclipse IDE there is a free plugin Manik-Hotdeploy   This plugin allows you to connect your eclipse workspace with your wildfly deployment folder  After a maven build your artifact  e g  war or ear  will be automatically pushed into the deployment folder of your server  Also web content files  e g   xhtml  jsf      will be hot deployed    The plugin runs for wildfly  glassfish and payara    Read the section JBoss Wildfly Support for more details

[deployment] Hot deploy on JBoss - how do I make JBoss "see" the change?

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