In this example, we will show how to use jetty runner. Jetty runner is a concept where you run your web applications with a single jar without installing jetty. You don’t need to administer jetty distribution in this case. Jetty runner is a standalone jar which can be used to deploy multiple web applications or run web applications with different configurations or even to configure JDBC JNDI Resource. Jetty runner is a more command line tool.
1. Environment
- Windows 7 SP 1
- Eclipse Kepler 4.3
- Jetty runner version 9.2.10.v20150310
- Java version 7
- Java Servlet library – servlet-api-3.1
- Maven 3.0.4
2. Example Outline
In this example, we will download jetty-runner jar. We will create a simple web-app with a single context and deploy that through jetty-runner . We will create two different web-apps and deploy them through jetty-runner . You can download jetty-runner here.
3. Jetty Runner Example
Here we will create two simple web applications web-app1 and web-app2 and then show how to run a single webapp through jetty-runner and how to run multiple webapps.
3.1 Create a Maven project for Web-app1
3.1.1 Maven Project
As shown in below screenshot, create a new maven project in eclipse. Fill in the detail with GroupId as com.javacodegeeks.example and ArtifactId as webapp1 .
Add following dependencies in pom.xml
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.javacodegeeks.example</groupId> <artifactId>webapp1</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <dependencies> <dependency> <groupId>org.eclipse.jetty</groupId> <artifactId>jetty-servlet</artifactId> <version>9.2.15.v20160210</version> </dependency> <dependency> <groupId>org.eclipse.jetty</groupId> <artifactId>jetty-webapp</artifactId> <version>9.2.15.v20160210</version> </dependency> </dependencies> </project>
3.1.2 Source Code for WebApp1
We will create a simple servlet for our webapp1 . Create a java file WebApp1Servlet under src->main->java as shown below:
WebApp1Servlet.java
package com.javacodegeeks.example;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class WebApp1Servlet
*/
@WebServlet("/WebApp1Servlet")
public class WebApp1Servlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public WebApp1Servlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<body>");
out.println("<h1>Hello Jetty Runner Servlet Web App 1</h1>");
out.println("</html>");
out.println("</body>");
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
}
If you create a maven project, sometimes by default, it won’t let you create a servlet class. To fix this, go to project -> properties -> project facets -> check Dynamic Web Module checkbox . Remember we are using java version 1.7, so you will have check the checkbox for Java version 1.7 in Project facets.
3.2 Create a Maven project for Web-app2
3.2.1 Maven Project
Let’s create another maven project for webapp2 as shown below. Fill in the details for GroupId as com.javacodegeeks.example and ArtifactId as webapp2 .
Add following dependencies in pom.xml
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.javacodegeeks.example</groupId> <artifactId>webapp1</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <dependencies> <dependency> <groupId>org.eclipse.jetty</groupId> <artifactId>jetty-servlet</artifactId> <version>9.2.15.v20160210</version> </dependency> <dependency> <groupId>org.eclipse.jetty</groupId> <artifactId>jetty-webapp</artifactId> <version>9.2.15.v20160210</version> </dependency> </dependencies> </project>
3.2.2 Source code for WebApp2
We will create a simple servlet for our webapp1 . Create a java file WebApp2Servlet under src->main->java as shown below:
