Configuring Maven for WAR Output

Modify the build configuration to change the artifact type. Set the packaging element to war within the POM.

<project>
    <groupId>com.example</groupId>
    <artifactId>enterprise-app</artifactId>
    <version>1.0.0</version>
    <packaging>war</packaging>
    <name>Enterprise Service</name>
</project>

Update the build section to define the final artifact name and ensure the Spring Boot plugin is present.

<build>
    <finalName>app-dist</finalName>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

Excluding Embedded Container Dependencies

The embedded Tomcat starter must be marked as provided to prevent conflicts with the external container.

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <scope>provided</scope>
    </dependency>
</dependencies>

Implementing Servlet Initializer

Create a clas extending SpringBootServletInitializer to bootstrpa the application.

public class ServletInitializer extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(EnterpriseApplication.class);
    }
}

Configuring Tomcat for Multiple Instances

Edit the conf/server.xml file to define separate services for each application.

<Server port="8005" shutdown="SHUTDOWN">
  <Service name="ServiceA">
    <Connector port="8081" protocol="HTTP/1.1" connectionTimeout="20000"/>
    <Engine name="Catalina" defaultHost="localhost">
      <Host name="localhost" appBase="dist/serviceA" unpackWARs="true" autoDeploy="true">
        <Context path="" docBase="enterprise-app.war" reloadable="true"/>
      </Host>
    </Engine>
  </Service>
  <Service name="ServiceB">
    <Connector port="8082" protocol="HTTP/1.1" connectionTimeout="20000"/>
    <Engine name="Catalina" defaultHost="localhost">
      <Host name="localhost" appBase="dist/serviceB" unpackWARs="true" autoDeploy="true">
        <Context path="" docBase="enterprise-app.war" reloadable="true"/>
      </Host>
    </Engine>
  </Service>
</Server>