Webapp runner is designed to allow you to launch an exploded or compressed war that is on your filesystem into a tomcat container with a simple
java -jar command.
Clone and Build
git clone firstname.lastname@example.org:jsimone/webapp-runner.git mvn package
java -jar target/webapp-runner.jar path/to/my/project
java -jar target/webapp-runner.jar myProject.war
java -jar target/webapp-runner.jar --help
Prints out all arguments accepted
Using with Maven in your project
You can use the Maven dependency plugin to download webapp-runner as part of your build. This will eliminate the need for any external dependencies other than those specified in your build to run your application.
Add the following to your pom.xml:
<build> ... <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-dependency-plugin</artifactId> <version>2.3</version> <executions> <execution> <phase>package</phase> <goals><goal>copy</goal></goals> <configuration> <artifactItems> <artifactItem> <groupId>com.github.jsimone</groupId> <artifactId>webapp-runner</artifactId> <version>184.108.40.206</version> <destFileName>webapp-runner.jar</destFileName> </artifactItem> </artifactItems> </configuration> </execution> </executions> </plugin> </plugins> ... </build>
Now when you run
maven package webapp runner will be downloaded for you. You can then launch your application with:
$ java -jar target/dependency/webapp-runner.jar target/<appname>.war
Store your sessions in memcache
In versions 220.127.116.11 and newer support for a session manager that stores sessions in memcache is built in.
To use it add
--session-store memcache to your startup command:
$ java -jar target/dependency/webapp-runner.jar --session-store memcache target/<appname>.war
Then make sure that three environment variables are available for configuration: MEMCACHE_SERVERS, MEMCACHE_USERNAME, MEMCACHE_PASSWORD
Store your sessions in redis
In versions 18.104.22.168 and newer support for a session manager that stores sessions in redis is built in.
To use it add
--session-store redis to your startup command:
$ java -jar target/dependency/webapp-runner.jar --session-store redis target/<appname>.war
Then make sure that Redis environment variable is available for configuration: REDIS_URL
Running your application in Eclipse
Since your application will just be a standard webapp you can still use WTP and the traditional Tomcat integration points to run your application within Eclipse. However the containerless nature of webapp runner allows you to run from within Eclipse in a simpler way.
Start by importing your project into Eclipse. It is best to import it as an existing Maven project using the m2eclipse plugin.
Make your application dependant on webapp runner
Add the following dependency to your pom.xml:
<dependency> <groupId>com.github.jsimone</groupId> <artifactId>webapp-runner</artifactId> <version>22.214.171.124</version> <scope>provided</scope> </dependency>
This will cause Eclipse to include webapp-runner on the classpath of your project so that it can be used for launching. It won't affect the final artifact built for your application.
Create a launch configuration
- Right-click on your project and choose 'Debug As -> Debug Configurations...'
- From the 'Debug Configuration' window create a new 'Java Application' launch configuration by double-clicking on 'Java Application' in the left hand list or right-clicking on it and selecting 'New'
- Give your launch configuration a sensible name. Then enter the name of your project in the 'Project' box
- Enter 'webapp.runner.launch.Main' in the 'Main Class' box
- Click on the 'Arguments' tab and enter './src/main/webapp' in the 'Program Arguments' box
- Click 'Apply' and then 'Run'
Your application should start and you should see the log output in the Eclipse console. Since you have a debugger attached to your application you'll now see changes to your code get automatically loaded without restarting and can set breakpoints.
You can stop the application from the red square in the console pane or from the debug perspective. It can be restarted by right-clicking on the project and choosing your new launch configuration from the 'Debug As' menu or from the debug menu in the Eclipse toolbar (the icon with the little bug).
Note: webapp runner is now available in Maven Central. The version scheme has also chanaged to match the version of Tomcat that it relies on. The format is .. The latest version is now 7.0.30.x. Versions 0.0.1 to 0.0.7 are still available at http://jsimone.github.com/webapp-runner/repository.
Copyright (c) 2012, John Simone All rights reserved.
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