Create the Maven POM file

Create an empty directory to store your Maven project. Inside of that directory create the pom.xml file with the content as below.

<?xml version="1.0" encoding="UTF-8"?>

<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>cloud.piranha.guides.servlet</groupId>
    <artifactId>pages</artifactId>
    <version>24.11.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>Create a Jakarta Pages application on Piranha Servlet</name>
    <properties>
        <!-- dependencies -->
        <junit.version>5.10.2</junit.version>
        <piranha.version>24.4.0</piranha.version>
        <!-- other -->
        <java.version>21</java.version>
        <piranha.distribution>servlet</piranha.distribution>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <!-- plugins -->
        <maven-compiler-plugin.version>3.13.0</maven-compiler-plugin.version>
        <maven-failsafe-plugin.version>3.2.5</maven-failsafe-plugin.version>
        <maven-war-plugin.version>3.4.0</maven-war-plugin.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-params</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <finalName>pages</finalName>
        <plugins>
            <plugin>
                <groupId>cloud.piranha.maven.plugins</groupId>
                <artifactId>piranha-maven-plugin</artifactId>
                <version>${piranha.version}</version>
                <executions>
                    <execution>
                        <id>pre-integration-test</id>
                        <phase>pre-integration-test</phase>
                        <goals>
                            <goal>start</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>post-integration-test</id>
                        <phase>post-integration-test</phase>
                        <goals>
                            <goal>stop</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <distribution>servlet</distribution>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>${maven-compiler-plugin.version}</version>
                <configuration>
                    <release>${java.version}</release>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-failsafe-plugin</artifactId>
                <version>${maven-failsafe-plugin.version}</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>integration-test</goal>
                            <goal>verify</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>${maven-war-plugin.version}</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

Add the Hello Pages JSP file

Add the hellopages.jsp file in the src/main/webapp directory.

<%@page contentType="text/html" pageEncoding="UTF-8"%>

<!DOCTYPE html>

<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    </head>
    <body>
        <h1>Hello from Jakarta Pages!</h1>
    </body>
</html>

Add an integration test

As we want to make sure the application gets tested before we release an integration test is added which will be executed as part of the build.

We'll add the integration test to the src/test/java directory.

package hello;

import java.net.URI;
import java.net.http.HttpClient;
import static java.net.http.HttpClient.Redirect.ALWAYS;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpResponse.BodyHandlers;
import java.time.Duration;
import static org.junit.jupiter.api.Assertions.assertTrue;
import org.junit.jupiter.api.Test;

public class HelloIT {

    @Test
    public void testHelloPagesJsp() throws Exception {
        HttpClient client = HttpClient
                .newBuilder()
                .connectTimeout(Duration.ofSeconds(60))
                .followRedirects(ALWAYS)
                .build();
        HttpRequest request = HttpRequest
                .newBuilder(new URI("http://localhost:8080/pages/hellopages.jsp"))
                .build();
        HttpResponse<String> response = client.send(request, BodyHandlers.ofString());
        assertTrue(response.body().contains("Hello from Jakarta Pages!"));
    }
}

Test the application

The application is setup to use JUnit to do integration testing using the Piranha Maven plugin so when you are building the application it will also execute an integration test validating the web application works.

To build and test the application execute the following command:

  mvn install

Deploy the application

To deploy your application you will need 2 pieces.

1. The Piranha Servlet runtime JAR.
2. The WAR file you just produced.

For the WAR file see the target directory. For the Piranha Servlet distribution go to Maven Central. And then the following command line will deploy your application:

  java -jar piranha-dist-servlet.jar --war-file pages.war

Conclusion

As you can see using Jakarta Pages on Piranha Servlet is very easy!