CAS Maven Overlay And Spring Boot do not work together - maven

Question

I create a spring boot application from spring.io, then add CAS dependecy to pom file of project as below.
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<dependency>
<groupId>org.apereo.cas</groupId>
<artifactId>cas-server-webapp</artifactId>
<version>${cas.version}</version>
<type>war</type>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>${h2.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<configuration>
<overlays>
<overlay>
<groupId>org.apereo.cas</groupId>
<artifactId>cas-server-webapp</artifactId>
</overlay>
</overlays>
</configuration>
</plugin>
</plugins>
</build>
after that start spring boot application, but CAS does not start in spring boot application.
what is the main problem in this usage of CAS?
Is the method of using the CAS at this way wrong?
_____________________________________________________________
finaly I solve my problem. I change the pom file as below
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<javaparser-core.version>3.12.0</javaparser-core.version>
<start.class>org.apereo.cas.web.CasWebApplication</start.class>
<start.class2>x.y.sso.SingleSignOnApplication</start.class2>
<h2.version>1.4.197</h2.version>
<cas.version>6.0.1</cas.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apereo.cas</groupId>
<artifactId>cas-server-webapp-tomcat</artifactId>
<version>${cas.version}</version>
<type>war</type>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.github.javaparser</groupId>
<artifactId>javaparser-core</artifactId>
<version>${javaparser-core.version}</version>
</dependency>
<dependency>
<groupId>org.apereo.cas</groupId>
<artifactId>cas-server-core-configuration</artifactId>
<version>${cas.version}</version>
</dependency>
<dependency>
<groupId>org.apereo.cas</groupId>
<artifactId>cas-server-core-configuration</artifactId>
<version>${cas.version}</version>
</dependency>
</dependencies>
<build>
<finalName>cas</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>${start.class2}</mainClass>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
<!--<recompressZippedFiles>false</recompressZippedFiles>-->
<archive>
<compress>false</compress>
<manifestFile>
${project.build.directory}/war/work/org.apereo.cas/cas-server-webapp-tomcat/META-INF/MANIFEST.MF
</manifestFile>
</archive>
<overlays>
<overlay>
<groupId>org.apereo.cas</groupId>
<artifactId>cas-server-webapp-tomcat</artifactId>
</overlay>
</overlays>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
</plugin>
</plugins>
</build>
then I create a Application class
#EnableDiscoveryClient
#SpringBootApplication(exclude = {
HibernateJpaAutoConfiguration.class,
JerseyAutoConfiguration.class,
JmxAutoConfiguration.class,
DataSourceAutoConfiguration.class,
DataSourceHealthIndicatorAutoConfiguration.class,
RedisAutoConfiguration.class,
MongoAutoConfiguration.class,
MongoDataAutoConfiguration.class,
CassandraAutoConfiguration.class,
DataSourceTransactionManagerAutoConfiguration.class,
RedisRepositoriesAutoConfiguration.class})
#EnableConfigurationProperties({CasConfigurationProperties.class})
#EnableAsync
#EnableTransactionManagement(proxyTargetClass = true)
#EnableScheduling
public class SingleSignOnApplication {
public static void main(String[] args) {
SpringApplication.run(SingleSignOnApplication.class, args);
}
}
by this configuration, build maven goal and execution project by spring boot work correctly.

Answer 1

CAS is already a spring boot web application. Therefor have a look into cas-server-webapp-init-6.0.1.jar and look CasWebApplication.java.
#EnableDiscoveryClient
#SpringBootApplication(exclude={HibernateJpaAutoConfiguration.class, JerseyAutoConfiguration.class, GroovyTemplateAutoConfiguration.class, JmxAutoConfiguration.class, DataSourceAutoConfiguration.class, DataSourceHealthIndicatorAutoConfiguration.class, RedisAutoConfiguration.class, MongoAutoConfiguration.class, MongoDataAutoConfiguration.class, CassandraAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class, RedisRepositoriesAutoConfiguration.class})
#EnableConfigurationProperties({CasConfigurationProperties.class})
#EnableAsync
#EnableTransactionManagement(proxyTargetClass=true)
#EnableScheduling
public class CasWebApplication
{
public static void main(String[] args)
{
Map<String, Object> properties = CasEmbeddedContainerUtils.getRuntimeProperties(Boolean.TRUE);
Banner banner = CasEmbeddedContainerUtils.getCasBannerInstance();
new SpringApplicationBuilder(new Class[] { CasWebApplication.class })
.banner(banner)
.web(WebApplicationType.SERVLET)
.properties(properties)
.logStartupInfo(true)
.contextClass(CasWebApplicationContext.class)
.run(args);
}
}
Remove the spring-boot-starter dependencies and CAS should start itself as a web application.
For further investigation I would recommend you to download the war from https://search.maven.org/artifact/org.apereo.cas/cas-server-webapp/6.0.1/war and inspect it with a tool like jd-gui.