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

Question

I am having problems with Spring Boot and JSF. The servlet seems to start correctly, but when I try to access the 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 don't have web.xml or faces-config.xml, and my pom.xml looks like this

 <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.xyz</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 jsf api related dependencies, but I cannot figure out where. Any help in resolving this issue would be greatly appreciated.

Answer 1

To get JSF to work with Spring Boot without web.xml or faces-config.xml , you need to get it to load its configuration files using the init parameter on ServletContext . An easy way to do this is to implement ServletContextAware :

 public class Application implements ServletContextAware { // ... @Override public void setServletContext(ServletContext servletContext) { servletContext.setInitParameter("com.sun.faces.forceLoadConfiguration", Boolean.TRUE.toString()); } } 

The JSF ConfigureListener also has a JSP dependency, so you need to add a Jasper dependency to your pom:

 <dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-jasper</artifactId> </dependency> 

This is not directly related to your problem, but you do not need to declare the FacesServlet as a bean. Enough ServletRegistrationBean .

This leaves Application.java 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

Packaging pom, changing from a jar to war, does not bring anything, as I see now (Spring Boot 2, JSF 2.3) - the same error, himmelgottsakrament.