Spring Boot with JSF; Could not find backup for factory javax.faces.context.FacesContextFactory - maven

Question

I'm having some problems with Spring Boot and JSF. The servlet appears to start up correctly, but when I attempt to access a resource I get the following exception
java.lang.IllegalStateException: Could not find backup for factory javax.faces.context.FacesContextFactory.
at javax.faces.FactoryFinder$FactoryManager.getFactory(FactoryFinder.java:1011)
at javax.faces.FactoryFinder.getFactory(FactoryFinder.java:343)
at javax.faces.webapp.FacesServlet.init(FacesServlet.java:302)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1284)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:884)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:134)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:683)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1720)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1679)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:724)
My Application class is as follows
#Configuration
#EnableAutoConfiguration
#ComponentScan
public class Application extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(Application.class);
}
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(Application.class);
}
#Bean
public FacesServlet facesServlet() {
return new FacesServlet();
}
#Bean
public ServletRegistrationBean facesServletRegistration() {
ServletRegistrationBean registration = new ServletRegistrationBean(
facesServlet(), "*.xhtml");
registration.setName("Christmas");
return registration;
}
#Bean
public ServletListenerRegistrationBean<ConfigureListener> jsfConfigureListener() {
return new ServletListenerRegistrationBean<ConfigureListener>(
new ConfigureListener());
}
}
I have no web.xml or faces-config.xml, and my pom.xml is as follows
<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.x.y.z</groupId>
<artifactId>project</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.1.5.RELEASE</version>
</parent>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</dependency>
<dependency>
<groupId>org.primefaces</groupId>
<artifactId>primefaces</artifactId>
<version>5.0</version>
</dependency>
<!-- JSF 2 -->
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-api</artifactId>
<version>2.1.11</version>
</dependency>
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-impl</artifactId>
<version>2.1.11</version>
</dependency>
</dependencies>
</project>
I have a suspicion that there are some conflicts in the dependencies relating to the jsf api, but I can't seem to figure out where. Any help on fixing this issue would be greatly appreciated.

Answer 1

To get JSF working on Spring Boot without a web.xml or faces-config.xml you need to force it to load its configuration files via an init parameter on the ServletContext. An easy way to do that is to implement ServletContextAware:
public class Application implements ServletContextAware {
// ...
#Override
public void setServletContext(ServletContext servletContext) {
servletContext.setInitParameter("com.sun.faces.forceLoadConfiguration", Boolean.TRUE.toString());
}
}
JSF's ConfigureListener also has a dependency on JSP, so you'll need to add a dependency on Jasper to your pom:
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
It's not directly related to your problem, but you don't need to declare FacesServlet as a bean. The ServletRegistrationBean is sufficient.
This leaves Application.java looking as follows:
import javax.faces.webapp.FacesServlet;
import javax.servlet.ServletContext;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.context.embedded.ServletListenerRegistrationBean;
import org.springframework.boot.context.embedded.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.ServletContextAware;
import com.sun.faces.config.ConfigureListener;
#Configuration
#EnableAutoConfiguration
#ComponentScan
public class Application implements ServletContextAware {
public static void main(String[] args) {
SpringApplication.run(Application.class);
}
#Bean
public ServletRegistrationBean facesServletRegistration() {
ServletRegistrationBean registration = new ServletRegistrationBean(
new FacesServlet(), "*.xhtml");
registration.setLoadOnStartup(1);
return registration;
}
#Bean
public ServletListenerRegistrationBean<ConfigureListener> jsfConfigureListener() {
return new ServletListenerRegistrationBean<ConfigureListener>(
new ConfigureListener());
}
#Override
public void setServletContext(ServletContext servletContext) {
servletContext.setInitParameter("com.sun.faces.forceLoadConfiguration", Boolean.TRUE.toString());
}
}

Answer 2

probably you forget add listener com.sun.faces.config.ConfigureListener.class :
#Bean
public ServletContextInitializer servletContextInitializer() {
return sc -> {
***sc.addListener(com.sun.faces.config.ConfigureListener.class);***
sc.setInitParameter("com.sun.faces.expressionFactory", "com.sun.el.ExpressionFactoryImpl");
sc.setInitParameter("com.sun.faces.forceLoadConfiguration", Boolean.TRUE.toString());
sc.setInitParameter("facelets.DEVELOPMENT", Boolean.TRUE.toString());
sc.setInitParameter("javax.faces.DEFAULT_SUFFIX", ".xhtml");
sc.setInitParameter("javax.faces.FACELETS_LIBRARIES", "springsecurity.taglib.xml");
sc.setInitParameter("javax.faces.FACELETS_REFRESH_PERIOD", "1");
sc.setInitParameter("javax.faces.FACELETS_SKIP_COMMENTS", Boolean.TRUE.toString());
sc.setInitParameter("javax.faces.PARTIAL_STATE_SAVING_METHOD", Boolean.TRUE.toString());
sc.setInitParameter("javax.faces.PROJECT_STAGE", "Development");
sc.setInitParameter("javax.faces.STATE_SAVING_METHOD", "server");
sc.setInitParameter("primefaces.CLIENT_SIDE_VALIDATION", Boolean.TRUE.toString());
sc.setInitParameter("primefaces.FONT_AWESOME", Boolean.TRUE.toString());
sc.setInitParameter("primefaces.THEME", "Omega");
};
}