wicket,spring jpa repository - nullpointer on #Autowire - spring

Question

Im trying to build an application based on wicket, Spring jpa repositories, and Mysql.
The problem is, my Service classes just don't want to autowire. I got a nullpointer exception if i want to use my autowired class.
In fact, i got double nullpointer: My BaseServiceConfig.java doesnt autowire the implementation, and the autowired repository in the itnerface is also null. So, the question is why.
public final class ArmyBuilderPanel extends Panel {
#Autowired
DiskService diskService; //--> frist null, before setting it.
public ArmyBuilderPanel(String id) {
super(id);
add(new Label("armyPanel", "Content placeholder: Army builder panel"));
diskService = new DiskServiceImpl();
diskService.save(new Disk()); //--> second nullpointer
} }
Im trying to do this with minimal to no xml, all the coniguration was done in java classes. Let me show you the code:
Repository interface:
#Transactional
public interface DiskRepository extends JpaRepository<Disk, Long> {
}
Service itnerface:
public interface DiskService {
public Disk save(Disk entity);
}
Service impementation:
#Service
public class DiskServiceImpl implements DiskService {
#Autowired
DiskRepository diskRepo;
#Override
public Disk save(Disk entity) {
return diskRepo.save(entity);
}
}
BaseServiceConfig.java
#Configuration
#EnableJpaRepositories(basePackages = {"hu.diskwars"})
public class BaseServiceConfig {
#Bean
DiskService diskService() {
return new DiskServiceImpl();
}
}
PersistenceJPAConfig.java
#Configuration
#EnableTransactionManagement
#EnableJpaRepositories(basePackages = {"hu.diskwars"}) public class
PersistenceJPAConfig implements DisposableBean {
#Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(dataSource());
em.setPackagesToScan(new String[]{"hu.diskwars"});
JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
em.setJpaProperties(additionalProperties());
return em;
}
#Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://localhost:3306/whdiskwars_db");
dataSource.setUsername("Westy");
dataSource.setPassword("pass");
return dataSource;
}
#Bean
public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(emf);
return transactionManager;
}
#Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
Properties additionalProperties() {
return new Properties() {
{ // Hibernate Specific:
setProperty("hibernate.hbm2ddl.auto", "create-drop");
setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
}
};
}
#Override
public void destroy() throws Exception {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
} }
BaseServiceConfig.java (autowiring the implementation)
#Configuration #EnableJpaRepositories(basePackages = {"hu.diskwars"})
public class BaseServiceConfig {
#Bean
DiskService diskService() {
return new DiskServiceImpl();
}
}
web.xml
> <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5"
> xmlns="http://java.sun.com/xml/ns/javaee"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
> http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
>
> <display-name>diskwars</display-name>
> <context-param>
> <param-name>contextClass</param-name>
> <param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext</param-value>
> </context-param>
>
> <context-param>
> <param-name>contextConfigLocation</param-name>
> <param-value>hu.diskwars.config</param-value> </context-param>
>
> <listener>
> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
> </listener>
> <filter> <filter-name>wicket.diskwars</filter-name> <filter-class>org.apache.wicket.protocol.http.WicketFilter</filter-class>
> <init-param> <param-name>applicationClassName</param-name>
> <param-value>hu.diskwars.view.application.WicketApplication</param-value>
> </init-param> </filter>
>
> <filter-mapping> <filter-name>wicket.diskwars</filter-name>
> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
pom.xml:
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>hu.dwdb</groupId>
<artifactId>diskwars</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>diskwars</name>
<description></description>
<properties>
<wicket.version>6.13.0</wicket.version>
<jetty.version>7.6.13.v20130916</jetty.version>
<wtp.version>none</wtp.version>
<slf4j.version>1.6.1</slf4j.version>
<spring.version>3.2.2.RELEASE</spring.version>
<jpa.version>1.2.0.RELEASE</jpa.version>
<hibernate.version>4.2.0.Final</hibernate.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>${jpa.version}</version>
<type>jar</type>
</dependency>
<!-- WICKET DEPENDENCIES -->
<dependency>
<groupId>org.apache.wicket</groupId>
<artifactId>wicket-core</artifactId>
<version>${wicket.version}</version>
</dependency>
<dependency>
<groupId>org.apache.wicket</groupId>
<artifactId>wicket-extensions</artifactId>
<version>${wicket.version}</version>
</dependency>
<!-- LOGGING DEPENDENCIES - LOG4J -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.6.4</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<!-- JUNIT DEPENDENCY FOR TESTING -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!-- JETTY DEPENDENCIES FOR TESTING -->
<dependency>
<groupId>org.eclipse.jetty.aggregate</groupId>
<artifactId>jetty-all-server</artifactId>
<version>${jetty.version}</version>
<scope>provided</scope>
</dependency>
<!-- HIBERNATE DEPENDENCIES -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>${hibernate.version}</version>
</dependency>
<!-- MYSQL DRIVER -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.29</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<filtering>false</filtering>
<directory>src/main/resources</directory>
</resource>
<resource>
<filtering>false</filtering>
<directory>src/main/java</directory>
<includes>
<include>**</include>
</includes>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</resource>
</resources>
<testResources>
<testResource>
<filtering>false</filtering>
<directory>src/test/resources</directory>
</testResource>
<testResource>
<filtering>false</filtering>
<directory>src/test/java</directory>
<includes>
<include>**</include>
</includes>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</testResource>
</testResources>
<plugins>
<plugin>
<inherited>true</inherited>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
<encoding>UTF-8</encoding>
<showWarnings>true</showWarnings>
<showDeprecation>true</showDeprecation>
</configuration>
</plugin>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>${jetty.version}</version>
<configuration>
<connectors>
<connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector">
<port>8080</port>
<maxIdleTime>3600000</maxIdleTime>
</connector>
<connector implementation="org.eclipse.jetty.server.ssl.SslSocketConnector">
<port>8443</port>
<maxIdleTime>3600000</maxIdleTime>
<keystore>${project.build.directory}/test-classes/keystore</keystore>
<password>wicket</password>
<keyPassword>wicket</keyPassword>
</connector>
</connectors>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<configuration>
<downloadSources>true</downloadSources>
<wtpversion>${wtp.version}</wtpversion>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>Apache Nexus</id>
<url>https://repository.apache.org/content/repositories/snapshots/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
</project>
Here is a picture of my workspace:
Thanks for the help!
http://i.stack.imgur.com/P32oV.png
EDIT:
Added SpringInjector to my base wicket application
#Override
public void init() {
super.getComponentInstantiationListeners().add(new SpringComponentInjector(this));
}
And suddenly a completly new, error pops out, in conncetion with my persistance unit.
Caused by: org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'entityManagerFactory' defined in class
path resource [hu/diskwars/config/PersistenceJPAConfig.class]:
Invocation of init method failed; nested exception is
java.lang.IllegalStateException: Conflicting persistence unit
definitions for name 'diskwarsPU':
file:/D:/Development/projects/diskwars/target/diskwars-1.0-SNAPSHOT/WEB-INF/classes/,
file:/D:/Development/projects/diskwars/target/diskwars-1.0-SNAPSHOT/WEB-INF/classes/
The main problem is, i dont even have a persistance.xml file. I used to (with the same exact name 'diskwarsPU', but i throw it out, when i got to know, that i can do all the configurations without it.
I cleaned, builded the project again, even deleted the target folder, no use.

Answer 1

Wicket know really nothing about Spring #Autowired annotation. Use Wicket #SpringBean annotation and SringComponentInjector to inject a Sring bean into Wicket components.
The full example how to use #SpringBean annotation is in question How can I get a Spring bean injected in my custom Wicket model class?