ClassNotFoundException CrudRepository - spring

Question

I'm reading the JPA docs on spring, and i'm trying to restructure my code.
What i have now:
BrewerRepository
#Repository
public class BrewerRepository {
#PersistenceContext(name = "vivesPU")
private EntityManager entityManager;
public List<Brewer> getAll() {
return null;
}
}
BrewerService
#Service
public class BrewerService {
#Autowired
private BrewerRepository brewerRepository;
public List<Brewer> getAll() {
return null;
}
}
HomeController
#Controller
public class HomeController {
#Autowired
private BrewerService brewerService;
#GetMapping("/")
public String index(Model model) {
List<Brewer> brewers = this.brewerService.getAll();
model.addAttribute("brewers", brewers);
return "index";
}
}
PersistenceJPAConfig
#Configuration
#EnableTransactionManagement
#EnableJpaRepositories
public class PersistenceJPAConfig{
#Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean entityManager = new LocalContainerEntityManagerFactoryBean();
entityManager.setDataSource(dataSource());
entityManager.setPackagesToScan("org.vives.model");
JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
entityManager.setJpaVendorAdapter(vendorAdapter);
entityManager.setJpaProperties(additionalProperties());
return entityManager;
}
#Bean
public DataSource dataSource(){
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName("org.apache.derby.jdbc.EmbeddedDriver");
dataSource.setUrl("jdbc:derby://localhost:1527/beers;create=true");
dataSource.setUsername( "app" );
dataSource.setPassword( "app" );
return dataSource;
}
#Bean
public PlatformTransactionManager transactionManager(EntityManagerFactory entityManager){
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManager);
return transactionManager;
}
#Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation(){
return new PersistenceExceptionTranslationPostProcessor();
}
private Properties additionalProperties() {
Properties properties = new Properties();
properties.setProperty("hibernate.hbm2ddl.auto", "create-drop");
properties.setProperty("hibernate.dialect", "org.hibernate.dialect.DerbyTenSevenDialect");
properties.setProperty("hibernate.transaction.jta.platform", "org.hibernate.service.jta.platform.internal.SunOneJtaPlatform");
properties.setProperty("hibernate.show_sql", "true");
return properties;
}
}
With this code, the application starts without problems.
When i change the Repository and Service like this:
#Repository
public interface BrewerRepository extends CrudRepository<Brewer, Long> {
}
#Service
public class BrewerService {
#PersistenceContext(name = "vivesPU")
private EntityManager entityManager;
#Autowired
private BrewerRepository brewerRepository;
public List<Brewer> getAll() {
return null;
}
}
Error log:
Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'homeController': Unsatisfied dependency expressed through field 'brewerService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'brewerService' defined in file [.\glassfish-5.0\glassfish5\glassfish\domains\domain1\applications\spring-mvc-quickstart-1.0-SNAPSHOT\WEB-INF\classes\org\vives\service\BrewerService.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.vives.service.BrewerService] from ClassLoader [WebappClassLoader (delegate=true; repositories=WEB-INF/classes/)]]]
...
Context initialization failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'homeController': Unsatisfied dependency expressed through field 'brewerService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'brewerService' defined in file [.\glassfish-5.0\glassfish5\glassfish\domains\domain1\applications\spring-mvc-quickstart-1.0-SNAPSHOT\WEB-INF\classes\org\vives\service\BrewerService.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.vives.service.BrewerService] from ClassLoader [WebappClassLoader (delegate=true; repositories=WEB-INF/classes/)]
...
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'brewerService' defined in file [.\glassfish-5.0\glassfish5\glassfish\domains\domain1\applications\spring-mvc-quickstart-1.0-SNAPSHOT\WEB-INF\classes\org\vives\service\BrewerService.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.vives.service.BrewerService] from ClassLoader [WebappClassLoader (delegate=true; repositories=WEB-INF/classes/)]
...
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.vives.service.BrewerService] from ClassLoader [WebappClassLoader (delegate=true; repositories=WEB-INF/classes/)]
...
Caused by: java.lang.NoClassDefFoundError: org/springframework/data/repository/CrudRepository
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at org.glassfish.web.loader.WebappClassLoader.findClass(WebappClassLoader.java:1059)
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1588)
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1471)
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Class.java:2583)
at java.lang.Class.getDeclaredFields(Class.java:1916)
at org.springframework.util.ReflectionUtils.getDeclaredFields(ReflectionUtils.java:754)
... 82 more
Caused by: java.lang.ClassNotFoundException: org.springframework.data.repository.CrudRepository
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1621)
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1471)
... 92 more
]]
I've tried to look for an answer, but without success. Can someone explain to me why this is happening and tell me how I can fix it?
What I've tried so far:
checked the dependencies
deleted the .m2 folder and installed all
dependencies again messed a bit with annotations
changed a bit the project structure, according to this post
EDIT:
pom.xml
<?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>org.vives</groupId>
<artifactId>spring-mvc-quickstart</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<name>spring-mvc-quickstart</name>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java-version>1.8</java-version>
<!-- Override Spring version -->
<spring.version>5.0.0.RELEASE</spring.version>
<jackson.version>2.9.1</jackson.version>
<thymeleaf-extras-java8time-version>3.0.1.RELEASE</thymeleaf-extras-java8time-version>
<!-- AssertJ is not a part of Spring IO platform, so the version must be provided explicitly -->
<assertj-core-version>3.8.0</assertj-core-version>
</properties>
<dependencies>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.0.1.RELEASE</version>
</dependency>
<!-- Security -->
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>4.2.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>4.2.3.RELEASE</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>5.0.1.RELEASE</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<!-- Avoid issue #72 Could not initialize class org.thymeleaf.templateresolver.ServletContextTemplateResolver due to 'validation is not supported' -->
<exclusions>
<exclusion>
<artifactId>pull-parser</artifactId>
<groupId>pull-parser</groupId>
</exclusion>
</exclusions>
<version>5.2.9.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>2.0.1.RELEASE</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>spring-release</id>
<name>Spring Release Repository</name>
<url>https://repo.spring.io/release</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
<compilerArguments>
<endorseddirs>${endorsed.dir}</endorseddirs>
</compilerArguments>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>copy</goal>
</goals>
<configuration>
<outputDirectory>${endorsed.dir}</outputDirectory>
<silent>true</silent>
<artifactItems>
<artifactItem>
<groupId>javax</groupId>
<artifactId>javaee-endorsed-api</artifactId>
<version>7.0</version>
<type>jar</type>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

Answer 1

Came to this error [ Caused by: java.lang.ClassNotFoundException: org.springframework.data.repository.CrudRepository ] was using springboot dev tools auto build
but stopped the program -> clean -> run solved the issue on my end.

Answer 2

the CrudRepository class is not found which means that the pom dependencies are not defined well. The Crud repository is defined the spring-data-jpa and it is included but i think the problem could be found in the spring different dependencies that you are using that may conflict with each other. for example some dependencies may be included as a child dependencies in others, so they must not be included again. Also you must make sure that the spring dependencies versions are consistent.

Answer 3

I cleared the .m2 repository (path e.g. C:\Users\Hetal Rachh\.m2\repository) and then did a mvn clean install build and it worked.

Answer 4

The Constructor Injection is missing like:
#Autowired
public BrewerService(BrewerRepository brewerRepository) {
this.brewerRepository = brewerRepository
}
#Override
public List<Brewer> getAll() {
return brewerRepository.findAll();
}

Answer 5

As Amr Alaa mentioned, there was an issue with the dependencies. I solved my problem by creating a new project in a different folder and adding the dependencies again.

Answer 6

I usually update the project and let it rebuild, then restart the program in the spring boot dashboard.