问题
Spring data neo4j 4.0.0 Release
In spring mvc project i am trying to save a node by repository.save() method i am getting error.
@NodeEntity
public class Category
{
@GraphId
public Long id;
public String categoryName;
public Category()
{
}
public Category( Long id, String categoryName )
{
this.id = id;
this.categoryName = categoryName;
}
}
@Configuration
@EnableNeo4jRepositories("org.neo4j.example.northwind.repository")
@EnableTransactionManagement
public class AppContext extends Neo4jConfiguration
{
public static final String NEO4J_HOST = "http://localhost:";
public static final int NEO4J_PORT = 7474;
@Override
public SessionFactory getSessionFactory() {
System.setProperty("username", "neo4j");
System.setProperty("password","12345");
return new SessionFactory("org.neo4j.example.northwind.model");
}
@Bean
@Override
public Neo4jServer neo4jServer() {
return new RemoteServer(NEO4J_HOST + NEO4J_PORT);
}
@Bean
@Override
//@Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS)
public Session getSession() throws Exception {
return super.getSession();
}
}
Here is the stacktrace
[org.neo4j.ogm.session.Neo4jSession] (default task-5) org.neo4j.example.northwind.model.Category is not an instance of a persistable class
07:25:55,724 INFO [stdout] (default task-5) org.neo4j.example.northwind.model.Category@54c0a7da
07:25:56,064 ERROR [io.undertow.request] (default task-5) UT005023: Exception handling request to /test: org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.neo4j.ogm.session.result.ResultProcessingException: Failed to execute request:
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:973)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:86)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:72)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:282)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:261)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:80)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:172)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:199)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:774)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.neo4j.ogm.session.result.ResultProcessingException: Failed to execute request:
at org.neo4j.ogm.session.transaction.TransactionManager.executeRequest(TransactionManager.java:128)
at org.neo4j.ogm.session.transaction.TransactionManager.commit(TransactionManager.java:86)
at org.neo4j.ogm.session.transaction.LongTransaction.commit(LongTransaction.java:37)
at org.springframework.data.neo4j.transaction.Neo4jTransactionManager.commit(Neo4jTransactionManager.java:49)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:521)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:291)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:644)
at org.neo4j.example.northwind.controller.IndexController$$EnhancerBySpringCGLIB$$c48f93ec.cat(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:690)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
... 31 more
Caused by: org.apache.http.client.HttpResponseException: Not Found
at org.neo4j.ogm.session.transaction.TransactionManager.executeRequest(TransactionManager.java:106)
... 53 more
回答1:
You should extend Neo4jConfiguration to your config file and override below method:
@Override
public SessionFactory getSessionFactory() {
return new SessionFactory("com.neo.entity.neo");
}
Note, com.neo.entity.neo is package name of entity.
回答2:
I suggest you to provide credentials thru RemoteServer object
public Neo4jServer neo4jServer() {
return new RemoteServer(NEO4J_HOST + NEO4J_PORT, "neo4j", "12345");
}
回答3:
Adding just @EntityScan to my configurtion and specifying the packages to scan worked for me.
I am using Spring Boot 1.4.0 along with Neo4j 2.0.4.
来源：https://stackoverflow.com/questions/32675002/entity-is-not-an-instance-of-a-persistable-class-neo4j-4-0-0