CODEWITHSUNDEEP
javaspringmaventomcat
P.Péter
P.Péter

Reputation: 1547

generating a working war file with maven for a spring-boot web application

We have a maven-managed spring-boot application that we now need to deploy in tomcat using a WAR file. During development, we used maven to start an embedded tomcat with the command:

mvn -D"-classpath %classpath package.path.App" -D"exec.executable=java" process-classes org.codehaus.mojo:exec-maven-plugin:1.2.1:exec

I can build a war file by running mvn war:war, but if I try to deploy the resulting war, an error is produced:

SEVERE: ContainerBase.addChild: start: 
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext
...
Caused by: java.lang.IllegalStateException: No SpringApplication sources have been defined. Either override the configure method or add an @Configuration annotation

I tried adding a mainClass directive to the maven-war-plugin's configuration, but to no avail.

Upvotes: 3

Views: 1658

Answers (1)

P.Péter
P.Péter

Reputation: 1547

I managed to build a war following dunni's advice.

Basically, I needed to add a @SpringBootApplication annotation on the class extending SpringBootServletInitializer, and override its configure method.

So the diff of my code is like:

+@SpringBootApplication
 public class WebAppInitializer extends SpringBootServletInitializer {

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

I still have an error but only after spring starts, but I will ask about that in a different question.

Upvotes: 1

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