Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean while loading the context xml in run method - spring

Question

#Configuration
#EnableAutoConfiguration
#ComponentScan
#SpringBootApplication
public class InitService extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run("classpath:abc-server.xml", args);
}
}
++++++++++++++++++++++++++++++++++++++++++
Here i am trying to migrate the Spring MVC project to Spring boot Standalone jar with embedded tomcat. So i tried loading the context xml(abc-server.xml) used in the existing project. When i run/deploy the spring boot jar, the following exception is thrown.
++++++++++++++++++++++++++++++++++++
[2015-05-19 15:12:30,012] ERROR org.springframework.boot.SpringApplication - Application startup failed
org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:133)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:474)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
at com.gogo.asp.server.init.InitService.main(InitService.java:188)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.getEmbeddedServletContainerFactory(EmbeddedWebApplicationContext.java:183)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:156)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:130)
... 13 more

Answer 1

When you call run, you're only providing server-abc.xml as a source for your application's configuration:
SpringApplication.run("classpath:abc-server.xml", args);
That means that InitService is being ignored, including the fact that you've enabled auto-configuration. Without auto-configuration being switched on, Spring Boot will not automatically configure an embedded servlet container for you. You need to provide both InitService and abc-server.xml as configuration for your application.
I would provide InitService.class to SpringApplication.run and use #ImportResource to pull in your old XML configuration:
#SpringBootApplication
#ImportResource("classpath:abc-server.xml")
public class InitService {
public static void main(String[] args) {
SpringApplication.run(InitService.class, args);
}
}
Note that #SpringBootApplication is equivalent to #ComponentScan, #Configuration, and #EnableAutoConfiguration. You can just use #SpringBootApplication and drop the other three annotations as I've done above.