I am new in Java Spring. I would like to configure Tomcat to use as embedded servlet in the following way: EmbeddeApp.java
public class EmbeddedApp {
public static void main(String[] args) throws Exception {
AnnotationConfigWebApplicationContext webContext = new AnnotationConfigWebApplicationContext();
EmbeddedAppWebInitializer
webContext.register(EmbeddedAppWebInitializer.class);
Tomcat tomcat = new Tomcat();
File base = new File("WebContent/WEB-INF/views/");
System.out.println(base.getAbsolutePath());
Context rootCtx = tomcat.addContext("/", base.getAbsolutePath());
Tomcat.addServlet(rootCtx, "embeddedAppDispatcher", new DispatcherServlet(webContext));
rootCtx.addServletMapping("/*", "embeddedAppDispatcher");
tomcat.setPort(8080);
tomcat.start();
tomcat.getServer().await();
}
}
EmbeddedAppWebInitializer.java
public class EmbeddedAppWebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected String[] getServletMappings() {
System.out.println("TEST @@@@ ------------------- ");
return new String[] { "/*" };
}
@Override
protected Class<?>[] getRootConfigClasses() {
return new Class<?>[] { RootConfig.class };
}
@Override
protected Class<?>[] getServletConfigClasses() {
return new Class<?>[] { WebConfig.class };
}
@Override
protected String getServletName() {
return "embeddedAppDispatcher";
}
}
Files structure:
After startup EmbeddedAppWebInitializer is not initialized (no trace "TEST @@@@ ------------------- " in Eclipse console) and after entered in web browser: http://localhost:8080/EmbeddedApplication/weather appears the following errors: - in web browser:
javax.servlet.ServletException: Error allocating a servlet instance
- in Eclipse:
INFO: Starting service Tomcat
maj 22, 2017 10:28:10 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.56
maj 22, 2017 10:28:10 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
maj 22, 2017 10:28:15 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'embeddedAppDispatcher'
maj 22, 2017 10:28:17 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Allocate exception for servlet embeddedAppDispatcher
java.lang.IllegalStateException: Unable to locate the default servlet for serving static content. Please set the 'defaultServletName' property explicitly.
at org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler.setServletContext(DefaultServletHttpRequestHandler.java:106)
at org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer.enable(DefaultServletHandlerConfigurer.java:75)
at org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer.enable(DefaultServletHandlerConfigurer.java:64)
at webService.config.WebConfig.configureDefaultServletHandling(WebConfig.java:32)
at org.springframework.web.servlet.config.annotation.WebMvcConfigurerComposite.configureDefaultServletHandling(WebMvcConfigurerComposite.java:73)
at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration.configureDefaultServletHandling(DelegatingWebMvcConfiguration.java:72)
at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.defaultServletHandlerMapping(WebMvcConfigurationSupport.java:498)
at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$c6b2fbdc.CGLIB$defaultServletHandlerMapping$40()
at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$c6b2fbdc$$FastClassBySpringCGLIB$$a53c55e6.invoke()
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358)
at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$c6b2fbdc.defaultServletHandlerMapping()
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:540)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:138)
at javax.servlet.GenericServlet.init(GenericServlet.java:158)
at org.apache.catalina.startup.Tomcat$ExistingStandardWrapper.loadServlet(Tomcat.java:866)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:864)
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:503)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Does anyone know how to solve the problem, or what is causing this?
Everything looks ok when I start the application by 'Run As' -> 'Run On Server':
Servlet is initialized - trace: "TEST @@@@ ------------------- " is visible in console during startup.
