spring-boot application without a datasource

Question

Is it possible to create a spring-boot application that has NO datasource? In my case i just need a simple REST app but it seems on start up that there is an attempt to auto initialise a datasource

My pom.xml is

<?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">     <modelVersion>4.0.0</modelVersion>      <groupId>a.b.c.d.test</groupId>     <artifactId>rest-customer-builder</artifactId>     <version>0.0.1-SNAPSHOT</version>     <packaging>war</packaging>      <name>rest-customer-builder</name>      <parent>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-parent</artifactId>         <version>1.2.5.RELEASE</version>         <!--<relativePath/> lookup parent from repository -->     </parent>      <properties>         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>         <java.version>1.7</java.version>     </properties>      <dependencies>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-tomcat</artifactId>             <scope>provided</scope>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-test</artifactId>             <scope>test</scope>         </dependency>     </dependencies>      <build>         <plugins>             <plugin>                 <groupId>org.springframework.boot</groupId>                 <artifactId>spring-boot-maven-plugin</artifactId>             </plugin>         </plugins>     </build> </project> 

My application.properties is

server.contextPath=/rest-customer-builder server.port=9090 

When i run

mvn clean install spring-boot:run 

i see this error

015-08-18 14:54:31.870  INFO 12530 --- [lication.main()] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring 2015-08-18 14:54:31.903  WARN 12530 --- [lication.main()] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt  org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor': Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/apache/geronimo/osgi/locator/ProviderLocator     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)     at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:199)     at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:615)     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:465)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)     at com.bearingpoint.eircom.test.rest.customerbuilder.RestCustomerBuilderApplication.main(RestCustomerBuilderApplication.java:12)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)     at java.lang.reflect.Method.invoke(Method.java:606)     at org.springframework.boot.maven.RunMojo$LaunchRunner.run(RunMojo.java:418)     at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.NoClassDefFoundError: org/apache/geronimo/osgi/locator/ProviderLocator     at javax.validation.Validation$DefaultValidationProviderResolver.getValidationProviders(Validation.java:209)     at javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:173)     at org.springframework.validation.beanvalidation.LocalValidatorFactoryBean.afterPropertiesSet(LocalValidatorFactoryBean.java:223)     at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor$Jsr303ValidatorFactory.run(ConfigurationPropertiesBindingPostProcessor.java:381)     at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.afterPropertiesSet(ConfigurationPropertiesBindingPostProcessor.java:174)     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633)     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570)     ... 21 common frames omitted Caused by: java.lang.ClassNotFoundException: org.apache.geronimo.osgi.locator.ProviderLocator     at java.net.URLClassLoader$1.run(URLClassLoader.java:366)     at java.net.URLClassLoader$1.run(URLClassLoader.java:355)     at java.security.AccessController.doPrivileged(Native Method) 

Answer 1

It is possible to run a spring boot application without datasource. You must disable the auto configuration for the datasource and may be for JPA also :

@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class,HibernateJpaAutoConfiguration.class}) 

The exception you posted is something else, as written in the comments, you have something in the classpath that references the missing class of apache geronimo. So you must get rid of the code/jar that references geronimo or add geronimo to your dependencies.