Tomcat with Docker in local development workflow

Sample Java Web Project

1. Maven sample project
   • Folder webapp, following the standard.
   • pom.xml for package war

   • Default tomcat will append application name into URI, if want use root path, need add below line into server.xml, under <Host>

        <Context docBase="setup" path="" reloadable="true" source="org.eclipse.jst.jee.server:web">
         <WatchedResource>WEB-INF/web.xml</WatchedResource>
       </Context>
     

How tomcat deploy war

Copy *.war to $tomcatHome/webapps. After start tomcat will auto deploy application.

Deploy tomcat application hand by hand

Extract *.war and copy folder to $tomcatHome/webapps.

Use Docker for local development

From auto or manually deploy application, you can easy come out below powershell command for Docker

docker run -it --rm `
  -e JPDA_ADDRESS=*:8000 ` # for debug, tomcat9 need use *:8000, tomcat8 just use 8000
  -e JPDA_TRANSPORT=dt_socket `
  -p 8080:8080 `
  -p 8000:8000 `
  -v ${pwd}/local-develop/conf:/usr/local/tomcat/conf ` # for override tomcat conf, if need
  -v ${pwd}/target/setup:/usr/local/tomcat/webapps/setup ` # for applcaiiton
  -v ${pwd}/target/classes:/usr/local/tomcat/webapps/setup/WEB-INF/classes ` # for auto reload classes.IDE will auto build class to target.
  tomcat:9 `
  /usr/local/tomcat/bin/catalina.sh jpda run