Question
This is the error that is thrown when trying to run my web app:
[INFO] WARNING: Nested in org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private javax.sql.DataSource org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.dataSource; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceAutoConfiguration$NonEmbeddedConfiguration.class]: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public javax.sql.DataSource org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$NonEmbeddedConfiguration.dataSource()] threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Cannot determine embedded database driver class for database type NONE. If you want an embedded database please put a supported one on the classpath.:
[INFO] org.springframework.beans.factory.BeanCreationException: Cannot determine embedded database driver class for database type NONE. If you want an embedded database please put a supported one on the classpath.
[INFO] at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.getDriverClassName(DataSourceProperties.java:91)
[INFO] at org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$NonEmbeddedConfiguration.dataSource(DataSourceAutoConfiguration.java:100)
[INFO] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[INFO] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
[INFO] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[INFO] at java.lang.reflect.Method.invoke(Method.java:606)
[INFO] at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:115)
[INFO] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:166)
[INFO] at org.springframework.beans.factory.support.ConstructorResolver$3.run(ConstructorResolver.java:580)
[INFO] at java.security.AccessController.doPrivileged(Native Method)
[INFO] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:577)
[INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1094)
[INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:989)
[INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
[INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
[INFO] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
[INFO] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
[INFO] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
[INFO] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
[INFO] at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1017)
[INFO] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:960)
[INFO] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858)
[INFO] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
[INFO] at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
[INFO] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
[INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185)
[INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
[INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
[INFO] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
[INFO] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
[INFO] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
[INFO] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
[INFO] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:370)
[INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1094)
[INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:989)
[INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
[INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
[INFO] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
[INFO] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
[INFO] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
[INFO] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
[INFO] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:973)
[INFO] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:750)
[INFO] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
[INFO] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:683)
[INFO] at org.springframework.boot.SpringApplication.run(SpringApplication.java:313)
[INFO] at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:142)
[INFO] at org.springframework.boot.legacy.context.web.SpringBootContextLoaderListener.initWebApplicationContext(SpringBootContextLoaderListener.java:60)
[INFO] at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
[INFO] at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548)
[INFO] at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
[INFO] at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
[INFO] at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
[INFO] at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
[INFO] at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[INFO] at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
[INFO] at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[INFO] at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
[INFO] at org.mortbay.jetty.Server.doStart(Server.java:224)
[INFO] at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[INFO] at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:249)
[INFO] at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:306)
[INFO] at com.google.appengine.tools.development.AutomaticInstanceHolder.startUp(AutomaticInstanceHolder.java:26)
[INFO] at com.google.appengine.tools.development.AbstractModule.startup(AbstractModule.java:79)
[INFO] at com.google.appengine.tools.development.Modules.startup(Modules.java:88)
[INFO] at com.google.appengine.tools.development.DevAppServerImpl.doStart(DevAppServerImpl.java:254)
[INFO] at com.google.appengine.tools.development.DevAppServerImpl.access$000(DevAppServerImpl.java:47)
[INFO] at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:212)
[INFO] at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:210)
[INFO] at java.security.AccessController.doPrivileged(Native Method)
[INFO] at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:210)
[INFO] at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:277)
[INFO] at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
[INFO] at com.google.appengine.tools.development.DevAppServerMain.run(DevAppServerMain.java:219)
[INFO] at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:210)
I believe I have the right combination of datanucleus-appengine and
datanucleus jars:
2.1: Requires DataNucleus 3.1.x (core, api-jdo, api-jpa, enhancer). Requires SDK 1.6.4+ Note that this release of Datanucleus is no longer supported by the DataNucleus project
JPA App Config:
@Configuration
@EnableJpaRepositories("demo.core.entity")
@EnableTransactionManagement
class JpaApplicationConfig {
private static final Logger logger = Logger
.getLogger(JpaApplicationConfig.class.getName());
@Bean
public AbstractEntityManagerFactoryBean entityManagerFactory() {
logger.info("Loading Entity Manager...");
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setPersistenceUnitName("transactions-optional");
return factory;
}
@Bean
public PlatformTransactionManager transactionManager() {
logger.info("Loading Transaction Manager...");
JpaTransactionManager txManager = new JpaTransactionManager();
txManager.setEntityManagerFactory(entityManagerFactory().getObject());
return txManager;
}
@Bean
public PersistenceExceptionTranslator persistenceExceptionTranslator() {
return new OpenJpaDialect();
}
}
Application.java
@Configuration
@ComponentScan
@EnableAutoConfiguration
@RestController
public class Application {
private static final EntityManagerFactory INSTANCE =
Persistence.createEntityManagerFactory("transactions-optional");
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
@RequestMapping("/")
public String home() {
return "Hello World";
}
}
POM:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="...">
<modelVersion>4.0.0</modelVersion>
<groupId>org.demohq</groupId>
<artifactId>demo-boot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>demo-boot</name>
<description>Demo project</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.1.0.BUILD-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<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-legacy</artifactId>
<version>1.1.0.BUILD-SNAPSHOT</version>
</dependency>
<!--<dependency>-->
<!--<groupId>net.kindleit</groupId>-->
<!--<artifactId>gae-runtime</artifactId>-->
<!--<version>${gae.version}</version>-->
<!--<type>pom</type>-->
<!--<scope>provided</scope>-->
<!--</dependency>-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
</dependency>
<!--<dependency>-->
<!--<groupId>org.hsqldb</groupId>-->
<!--<artifactId>hsqldb</artifactId>-->
<!--<scope>runtime</scope>-->
<!--</dependency>-->
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-labs</artifactId>
<version>${gae.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-stubs</artifactId>
<version>${gae.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-testing</artifactId>
<version>${gae.version}</version>
<scope>test</scope>
</dependency>
<!-- DataNucleus -->
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-api-jpa</artifactId>
<version>${datanucleus.jpa.version}</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>${datanucleus.jpa.version}</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-enhancer</artifactId>
<version>${datanucleus.jpa.version}</version>
</dependency>
<dependency>
<groupId>com.google.appengine.orm</groupId>
<artifactId>datanucleus-appengine</artifactId>
<version>${datanucleus.version}</version>
<!-- Need to exclude the enhancer since it interfere with the enhancer plugin. -->
<exclusions>
<exclusion>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-enhancer</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo-api</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-jpa_2.0_spec</artifactId>
<version>1.1</version>
</dependency>
<!-- OpenJPA -->
<dependency>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa-persistence</artifactId>
<version>2.3.0</version>
</dependency>
</dependencies>
<properties>
<start-class>demo.Application</start-class>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.7</java.version>
<m2eclipse.wtp.contextRoot>/</m2eclipse.wtp.contextRoot>
<datanucleus.jpa.version>3.1.1</datanucleus.jpa.version>
<datanucleus.version>2.1.2</datanucleus.version>
<gae.version>1.8.8</gae.version>
<gae.home>${settings.localRepository}/com/google/appengine/appengine-java-sdk/${gae.version}/appengine-java-sdk/appengine-java-sdk-${gae.version}</gae.home>
<gae.application.version>test</gae.application.version>
<!--<org.springframework-version>4.0.5.RELEASE</org.springframework-version>-->
</properties>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<!--
<plugin>
<groupId>net.kindleit</groupId>
<artifactId>maven-gae-plugin</artifactId>
<version>0.9.6</version>
<dependencies>
<dependency>
<groupId>net.kindleit</groupId>
<artifactId>gae-runtime</artifactId>
<version>${gae.version}</version>
<type>pom</type>
</dependency>
</dependencies>
</plugin>
-->
<plugin>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>${gae.version}</version>
<configuration>
<enableJarClasses>false</enableJarClasses>
</configuration>
</plugin>
<plugin>
<artifactId>maven-release-plugin</artifactId>
<configuration>
<goals>gae:deploy</goals>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat6-maven-plugin</artifactId>
<version>2.0</version>
<configuration>
<path>/</path>
</configuration>
</plugin>
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>maven-datanucleus-plugin</artifactId>
<version>${datanucleus.jpa.version}</version>
<configuration>
<api>JPA</api>
<!--<mappingIncludes>**/entity/*.class</mappingIncludes>-->
<verbose>true</verbose>
</configuration>
<dependencies>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>${datanucleus.jpa.version}</version>
</dependency>
</dependencies>
<executions>
<execution>
<phase>compile</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<profiles>
<!-- We can configure our integration server to activate this profile and
perform gae:deploy, thus uploading latest snapshot to the http://1.latest.<applicationName>.appspot.com
automatically -->
<profile>
<id>integration-build</id>
<properties>
<gae.application.version>stage</gae.application.version>
</properties>
</profile>
<!-- This profile will activate automatically during release and upload
application to the http://2.latest.<applicationName>.appspot.com (We might
want to set the 2nd version as our applications Default version to be accessible
at http://<applicationName>.appspot.com) -->
<profile>
<id>release-build</id>
<activation>
<property>
<name>performRelease</name>
<value>true</value>
</property>
</activation>
<properties>
<!-- During release, set application version in appengine-web.xml to
2 -->
<gae.application.version>release</gae.application.version>
</properties>
</profile>
</profiles>
<repositories>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>http://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>http://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>http://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
<pluginRepository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>http://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</project>
I wonder what could be missing in my app? I followed the instruction from here [Using Spring Data JPA on Google Appengine](https://stackoverflow.com/questions/15359784/using-spring-data-jpa- on-google-appengine)
Answer
You haven't provided Spring Boot with enough information to auto-configure a
DataSource. To do so, you'll need to add some properties to
application.properties with the spring.datasource prefix. Take a look at
[DataSourceProperties](https://github.com/spring-projects/spring-
boot/blob/master/spring-boot-project/spring-boot-
autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jdbc/DataSourceProperties.java)
to see all of the properties that you can set.
You'll need to provide the appropriate url and driver class name:
spring.datasource.url = …
spring.datasource.driver-class-name = …
