i followed the tutorial posted here to get a basis application to work with Spring Data JPA. Now, how i understood, using the configuration<\/p>\n
\n<\/code><\/pre>\nshould result in that package beeing scanned by Spring Data JPA for interfaces extending JpaRepository<\/code> and create a concreate bean of it so it can be used anywhere in my service classes using simple Spring @Autowired<\/code>. But it fails, saying it can’t find a bean with className (which is the default name the bean gets when created, simply using the de-capitalized ClassName).<\/p>\nHowever, when i configure the bean manualy in my applicationContext like this:<\/p>\n
\n<\/code><\/pre>\nSpring is able to find the bean. I then of course get an error because i want to create a bean from an interface, which obviously can’t work. BUT the point is that it seems like the Spring Data JPA “automatic bean creation” seems to fail somehow.<\/p>\n
I attached the relevant code so you can look at it. Btw, i should mention that i’m developing a portlet, so don’t wonder why i dont have a spring-config. I’m currently using a applicationConfig only plus an MyPortlet-Portlet.xml for portlet configurations (but that should be not relevent for this problem). I added the import statements just to make sure i’m not using the wrong annotions \/ classes.<\/p>\n
applicationContext.xml<\/strong><\/p>\n\n\n\n\n\/\/ JPA specific configuration here: dataSource, persistenceUnitManager exceptionTranslator, entityManagerFactory, SessionFactory, transactionManager - should not be relevant for this problem, tell me if i'm wrong\n\n\n<\/code><\/pre>\nICustomerService – just a interface for the CustomerService<\/strong><\/p>\nimport model.entities.Customer;\npublic interface ICustomerService {\n \/\/ example method\n public Customer getCustomer(Long customerId); \n}\n<\/code><\/pre>\nCustomerService – the class used by my application logic to get \/ set ORM data<\/strong><\/p>\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.data.domain.Page;\nimport org.springframework.data.domain.Pageable;\nimport org.springframework.stereotype.Repository;\nimport org.springframework.transaction.annotation.Transactional;\nimport model.entities.Customer;\nimport model.repositories.CustomerRepository;\nimport model.service.interfaces.ICustomerService;\n@Repository\n@Transactional(readOnly = true)\npublic class CustomerService implements ICustomerService{\n @Autowired\n private CustomerRepository repository;\n\n \/\/ example method\n @Override\n public Customer getCustomer(Long customerId){\n return repository.findById(customerId);\n }\n<\/code><\/pre>\nCustomerRepository – the repository for Spring Data JPA<\/strong><\/p>\nimport javax.annotation.Resource;\nimport org.springframework.data.jpa.repository.JpaRepository;\nimport org.springframework.transaction.annotation.Transactional;\nimport model.entities.Customer;\n@Resource\n@Transactional(readOnly = true)\npublic interface CustomerRepository extends JpaRepository{\n\n public Customer findById(Long id);\n}\n<\/code><\/pre>\nCustomer – my sample entity<\/strong><\/p>\nimport javax.persistence.Column;\nimport javax.persistence.Entity;\nimport javax.persistence.GeneratedValue;\nimport javax.persistence.GenerationType;\nimport javax.persistence.Id;\nimport javax.persistence.Table;\n\n@Entity\n@Table(name = \"Customers\")\npublic class Customer{\n\n @Id\n @GeneratedValue(strategy=GenerationType.IDENTITY)\n @Column(name = \"ID_CUSTOMER\")\n private Long id;\n\n @Column(name = \"dbfirstname\")\n private String firstName;\n\n @Column(name = \"dbname\")\n private String lastName;\n\n public Long getId(){\n return id;\n }\n\n public String getFirstName(){\n return firstName;\n }\n\n public void setFirstName(String firstName){\n this.firstName = firstName;\n }\n\n public String getLastName(){\n return lastName;\n }\n\n public void setLastName(String lastName){\n this.lastName = lastName;\n }\n}\n<\/code><\/pre>\ni just came from classpath hell with WebSphere (damn, what a fu**ed up product) and now i’m here. hope somebody can help me with this.<\/p>\n
A basic explanation of what exacly goes wrong and maybe providing a better understanding of springs autowired injection feature would be great. I’ve read the spring documentation, but to say the truth: there are so many ways to configure something and it’s not quite visible to me WHAT is really needed when choosing one of the config styles.<\/p>\n
EDIT<\/strong><\/p>\nAfter trying to update the project i’m still getting the error. as requested here a little more details (trace):<\/p>\n
Exception created : org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private model.repositories.CustomerRepository model.service.CustomerService.repository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository': FactoryBean threw exception on object creation; nested exception is java.lang.NullPointerException\n at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:287)\n at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)\n [...]\n at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:522)\n at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1563)\nCaused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private model.repositories.CustomerRepository model.service.CustomerService.repository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository': FactoryBean threw exception on object creation; nested exception is java.lang.NullPointerException\n at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:506)\n at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)\n at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)\n ... 96 more\nCaused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository': FactoryBean threw exception on object creation; nested exception is java.lang.NullPointerException\n at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:149)\n at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:102)\n at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1442)\n at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:248)\n at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)\n at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:848)\n at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:790)\n at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:707)\n at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:478)\n ... 98 more\nCaused by: java.lang.NullPointerException\n at org.hibernate.engine.transaction.internal.jta.JtaStatusHelper.getStatus(JtaStatusHelper.java:73)\n at org.hibernate.engine.transaction.internal.jta.JtaStatusHelper.isActive(JtaStatusHelper.java:115)\n at org.hibernate.engine.transaction.internal.jta.CMTTransaction.join(CMTTransaction.java:149)\n at org.hibernate.ejb.AbstractEntityManagerImpl.joinTransaction(AbstractEntityManagerImpl.java:1215)\n at org.hibernate.ejb.AbstractEntityManagerImpl.postInit(AbstractEntityManagerImpl.java:177)\n at org.hibernate.ejb.EntityManagerImpl.(EntityManagerImpl.java:89)\n at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:179)\n at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:174)\n at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)\n at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)\n at java.lang.reflect.Method.invoke(Method.java:600)\n at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.invokeProxyMethod(AbstractEntityManagerFactoryBean.java:376)\n at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean$ManagedEntityManagerFactoryInvocationHandler.invoke(AbstractEntityManagerFactoryBean.java:517)\n at $Proxy325.createEntityManager(Unknown Source)\n\n at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:234)\n at $Proxy328.createNamedQuery(Unknown Source)\n at org.springframework.data.jpa.repository.query.NamedQuery.(NamedQuery.java:74)\n at org.springframework.data.jpa.repository.query.NamedQuery.lookupFrom(NamedQuery.java:96)\n at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$DeclaredQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:128)\n at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:162)\n at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:71)\n at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.(RepositoryFactorySupport.java:303)\n at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:157)\n at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:120)\n at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:39)\n at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:142)\n<\/code><\/pre>\nEDIT #2<\/strong> compleate applicationContext.xml (includeing the changes i made based on the ongoing discussion) added as requested<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n \n\n\n\n\n\n \n \n classpath*:META-INF\/OverridePersistence.xml\n \n \n \n\n\n\n\n \n \n \n \n \n \n \n \n \n\n\n\n \n \n \n hibernate.dialect=org.hibernate.dialect.MySQLDialect\n \n\n\n\n \n \n\n\n\n\n\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"i followed the tutorial posted here to get a basis application to work with Spring Data JPA. Now, how i understood, using the configuration should result in that package beeing scanned by Spring Data JPA for interfaces extending JpaRepository and create a concreate bean of it so it can be used anywhere in my service […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5593","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/5593","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=5593"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/5593\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=5593"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=5593"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=5593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}