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So I am new to Spring - so I thought I would try Spring Boot
I am using a Maven to build - I set up a view requests, when I run it as "App" looks like it starts tomcat up itself and i have a service at default 8080 port, so when I call localhost:8080/service it's all good.
However when i try to package it up as a WAR to deploy to a server it doesn't work
So i thought i would go back to basics and deploy it onto my tomcat server locally and see what happens
So first off nothing happened - 404 - did a bit of googling at found out i need to include a web entry point like this - here's my main class
@ComponentScan @EnableAutoConfiguration public class App extends SpringBootServletInitializer { public static void main( String[] args ) { SpringApplication.run(App.class, args); } @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder application) { return application.sources(appClass); } private static Class<App> appClass = App.class; } so it looked like it worked, in the console i could see the red catalina startup text, then i saw the Spring boot start up (which i wasn't seeing before)
however when i try and call the service localhost:8080/service i still get a 404
when i run it as "App" it works a treat
is there something obvious i need to be doing ? to create the war i just
i have unzipped the WAR and it looked fine - there is a WEB-INF and a set of dependencies, etc.
any help would be good - as anyone had similar problems when deploying spring boot apps as a WAR?
***UPDATE****
Now i can get my war to deploy correctly on my local Tomcat 7 server - but when i try and deploy to an externally hosted Tomcat container i get
at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:175) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5262) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 15 more Jul 14, 2014 1:49:01 PM org.apache.catalina.startup.HostConfig deployDirectory SEVERE: Error deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/cookpot java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/cookpot]] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:898) at org.apache.catalina.core.ContainerBase.access$000(ContainerBase.java:130) at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:153) at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:142) at java.security.AccessController.doPrivileged(Native Method) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:869) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1095) at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1617) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Jul 14, 2014 1:49:01 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/examples Jul 14, 2014 1:49:01 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/host-manager Jul 14, 2014 1:49:01 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/CookPot Jul 14, 2014 1:49:02 PM org.apache.catalina.loader.WebappClassLoader validateJarFile INFO: validateJarFile(/usr/local/shared/tomcat/thecookpot/webapps/CookPot/WEB-INF/lib/tomcat-embed-core-7.0.52.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class Jul 14, 2014 1:49:02 PM org.apache.catalina.loader.WebappClassLoader validateJarFile INFO: validateJarFile(/usr/local/shared/tomcat/thecookpot/webapps/CookPot/WEB-INF/lib/tomcat-embed-el-7.0.52.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/el/Expression.class Jul 14, 2014 1:49:06 PM org.apache.catalina.core.ContainerBase addChildInternal SEVERE: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/CookPot]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895) at org.apache.catalina.core.ContainerBase.access$000(ContainerBase.java:130) at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:153) at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:142) at java.security.AccessController.doPrivileged(Native Method) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:869) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1095) at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1617) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: java.security.AccessControlException: access denied (java.util.PropertyPermission java.awt.headless write) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323) at java.security.AccessController.checkPermission(AccessController.java:546) at java.lang.SecurityManager.checkPermission(SecurityManager.java:532) at java.lang.System.setProperty(System.java:727) at org.springframework.boot.SpringApplication.run(SpringApplication.java:263) at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:130) at org.springframework.boot.context.web.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:89) at org.springframework.boot.context.web.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:51) at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:175) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5262) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 15 more Jul 14, 2014 1:49:06 PM org.apache.catalina.startup.HostConfig deployDirectory SEVERE: Error deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/CookPot java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/CookPot]] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:898) at org.apache.catalina.core.ContainerBase.access$000(ContainerBase.java:130) at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:153) at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:142) at java.security.AccessController.doPrivileged(Native Method) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:869) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1095) at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1617) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Jul 14, 2014 1:49:06 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/ROOT Jul 14, 2014 1:49:06 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/manager Jul 14, 2014 1:49:06 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/docs Jul 14, 2014 1:49:06 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/Cookpot Jul 14, 2014 1:49:06 PM org.apache.catalina.loader.WebappClassLoader validateJarFile INFO: validateJarFile(/usr/local/shared/tomcat/thecookpot/webapps/Cookpot/WEB-INF/lib/tomcat-embed-core-7.0.52.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class Jul 14, 2014 1:49:06 PM org.apache.catalina.loader.WebappClassLoader validateJarFile INFO: validateJarFile(/usr/local/shared/tomcat/thecookpot/webapps/Cookpot/WEB-INF/lib/tomcat-embed-el-7.0.52.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/el/Expression.class Jul 14, 2014 1:49:09 PM org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["http-bio-6350"] Jul 14, 2014 1:49:09 PM org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["ajp-bio-4350"] Jul 14, 2014 1:49:09 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 17529 ms 
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By using Spring Boot application, we can create a war file to deploy into the web server. In this chapter, you are going to learn how to create a WAR file and deploy the Spring Boot application in Tomcat web server.
Spring Boot has a complete Tomcat inside. It builds a so-called fat-jar with everything needed inside. You don't need Tomcat installed in your system.
There may be a standalone Tomcat server that should be used instead. In this article, we'll cover how to deploy a Spring boot application WAR to an standalone Tomcat instance. First, we need to tell Spring Boot to not use its embedded Tomcat as the servlet container for the application.
Create a Spring Boot Project for Tomcat The most popular way to start a Spring project is with Spring Initializr. Navigate to start.spring.io in your favorite web browser, then choose your project options: Leave as Maven, Java, and the latest stable Spring Boot (2.4.4)
Now, write a simple Rest Endpoint in Spring Boot Application class file using the code as shown below − Now, create a WAR file to deploy into the Tomcat server by using Maven and Gradle commands for packaging your application as given below − For Maven, use the command mvn package for packaging your application.
Remove the embedded Tomcat server by adding the following to your dependencies list: Finally enable your application as a servlet by extending your main class with SpringBootServletInitializer:
The chapter Packaging executable jar and war files in the Spring Boot reference documentation states:
To build a war file that is both executable and deployable into an external container you need to mark the embedded container dependencies as “provided”, e.g:
<?xml version="1.0" encoding="UTF-8"?> <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"> <!-- ... --> <packaging>war</packaging> <!-- ... --> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <scope>provided</scope> </dependency> <!-- ... --> </dependencies> </project> If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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