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[Java| SpringBoot]The Repository is not getting injected

I've been getting into Java again after some years only dealing with javascript and typescript, and I'm trying to get into Spring Boot.
It sounds really fun and convenient, but I'm trying to do something simple and for some reason I can't get my repository to get injected into my service. It sounds something really simple, but I've been digging for hours and can't get it to work.I'm wondering if some of you can help me to understand what I'm doing wrong ,please.
Thanks in advance
Projects (Entity)
package com.example.demo.modules.projects.entities;
import javax.persistence.*;
#Entity
#Table
public class Projects {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long id;
#Column
private String project_name;
#Column
private String description;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getProject_name() {
return project_name;
}
public void setProject_name(String project_name) {
this.project_name = project_name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
The Repository
package com.example.demo.modules.projects.repositories;
import com.example.demo.modules.projects.entities.Projects;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
#Repository
public interface IProjectRepository extends JpaRepository<Projects, Long> {
}
CreateProjectsService
package com.example.demo.modules.projects.services;
import com.example.demo.modules.projects.entities.Projects;
import com.example.demo.modules.projects.repositories.IProjectRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
#Service
public class CreateProjectService {
#Autowired
IProjectRepository iProjectRepository;
public Projects execute(Projects project){
System.out.println("Received " + project.toString());
Projects CreatedProject= this.iProjectRepository.save(project);
System.out.println("Created " + CreatedProject);
return CreatedProject;
}
}
The Error
It seems to not be injecting/instantiating correctly.
2020-10-09 00:56:08.774 ERROR 5856 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException: Cannot invoke "com.example.demo.modules.projects.repositories.IProjectRepository.save(Object)" because "this.iProjectRepository" is null] with root cause
java.lang.NullPointerException: Cannot invoke "com.example.demo.modules.projects.repositories.IProjectRepository.save(Object)" because "this.iProjectRepository" is null
at com.example.demo.modules.projects.services.CreateProjectService.execute(CreateProjectService.java:17) ~[classes/:na]
at com.example.demo.ServerApplication.newEmployee(ServerApplication.java:26) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:652) ~[tomcat-embed-core-9.0.38.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.38.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.38.jar:9.0.38]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[na:na]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.38.jar:9.0.38]
at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na]

The issue is because you did not allow Spring to instantiate CreateProjectService and takes control of the bean, probably you instantiated the object with new CreateProjectService().
The recommended approach is to create an interface e.g. ICreateProjectService like below:
public interface ICreateProjectService {
Projects execute(Projects project);
}
And then implement ICreateProjectService in CreateProjectService like below:
#Service
public class CreateProjectService implements ICreateProjectService {
#Autowired
private IProjectRepository iProjectRepository;
#Override
public Projects execute(Projects project) {
System.out.println("Received " + project.toString());
Projects CreatedProject= this.iProjectRepository.save(project);
System.out.println("Created " + CreatedProject);
return CreatedProject;
}
}
Then in your Controller layer, as an example of the service usage, autowire your service by injecting the interface, like below:
#Restcontroller
#RequestMapping("/api/v1")
public class CreateProjectRest {
#Autowired
private ICreateProjectService iCreateProjectService;
#PostMapping
public Projects execute(Projects project) {
createProjectService.execute(project);
// your code here
}
}
Now Spring is able to recognize CreateProjectService as a concrete implementation, instantiates it as a Spring bean, keeps it in Spring container and make it available for Dependency Injection wherever injected.
Hope this helps out.
UPDATE:
It is more advisable to inject dependencies via constructor than field or setter method.
#Restcontroller
#RequestMapping("/api/v1")
public class CreateProjectRest {
private ICreateProjectService iCreateProjectService;
/* No needed to annotate #Autowired after Spring 4.3.*/
public CreateProjectRest(ICreateProjectService iCreateProjectService){
this.iCreateProjectService = iCreateProjectService;
}
#PostMapping
public Projects execute(Projects project) {
createProjectService.execute(project);
// your code here
}
}

org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private java.lang.Integer

I just tried out setting up a demo CRUD api in hibernate and I've been unable to resolve the issue with this. I've tried this with multiple versions of Hibernate but none seem to work. I keep getting the error message "Error accessing field [private java.lang.Integer com.webapp.firstwebapp.Models.UserModel.id] by reflection for persistent property [com.webapp.firstwebapp.Models.UserModel#id] : com.webapp.firstwebapp.Models.UserModel#1bc31512",
"path": "/create/user", but everything seems fine. Here's the code for it:
FirstWebApp.java
package com.webapp.firstwebapp;
import java.io.File;
import com.webapp.firstwebapp.Models.UserModel;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
#SpringBootApplication
#RestController
public class FirstwebappApplication {
public static void main(String[] args) {
SpringApplication.run(FirstwebappApplication.class, args);
}
#GetMapping("/create/user")
public UserModel doSomething() throws Exception{
File file = new File("hibernate.cfg.xml");
UserModel userModel = new UserModel(122, "Jane Doe", "jane_doe");
StandardServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().configure(file).build();
SessionFactory sessionFactory = new MetadataSources(serviceRegistry).addAnnotatedClass(UserModel.class).buildMetadata().buildSessionFactory();
Session session = sessionFactory.openSession();
Transaction transaction = session.beginTransaction();
try{
session.save(userModel);
transaction.commit();
}catch(Exception e){
System.out.println(e);
StandardServiceRegistryBuilder.destroy(serviceRegistry);
throw e;
}
return userModel;
}
}
UserModel.java
package com.webapp.firstwebapp.Models;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="users")
public class UserModel {
#Id
#Column(name="id", nullable = false, unique = true)
public Integer id;
#Column(name="name", nullable = false, unique = false)
public String name;
#Column(name="username", nullable = false, unique = true)
public String username;
// #OneToMany(mappedBy = "user")
public UserModel(){
}
public UserModel(Integer id, String name, String username){
this.id = id;
this.username= username;
this.name = name;
}
public void setId(Integer id){
this.id = id;
}
public Integer getId(){
return id;
}
public void setName(String name){
this.name = name;
}
public String getName(){
return name;
}
public void setUsername(String username){
this.username = username;
}
public String getUsername(){
return username;
}
}
Is there something I'm missing or am I doing something wrong? Here is the full log report I'm getting on the console:
ERROR 11976 --- [nio-8080-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private java.lang.Integer com.webapp.firstwebapp.Models.UserModel.id] by reflection for persistent property [com.webapp.firstwebapp.Models.UserModel#id] : com.webapp.firstwebapp.Models.UserModel#1bc31512] with root cause
java.lang.IllegalArgumentException: Can not set java.lang.Integer field com.webapp.firstwebapp.Models.UserModel.id to com.webapp.firstwebapp.Models.UserModel
at java.base/jdk.internal.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167) ~[na:na]
at java.base/jdk.internal.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171) ~[na:na]
at java.base/jdk.internal.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:58)
~[na:na]
at java.base/jdk.internal.reflect.UnsafeObjectFieldAccessorImpl.get(UnsafeObjectFieldAccessorImpl.java:36) ~[na:na]
at java.base/java.lang.reflect.Field.get(Field.java:418) ~[na:na]
at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:71) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.tuple.entity.AbstractEntityTuplizer.getIdentifier(AbstractEntityTuplizer.java:230) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:5150) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.id.Assigned.generate(Assigned.java:31) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:115) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:194) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:179) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:75) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:102) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:637) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:630) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:625) ~[hibernate-core-5.4.21.Final.jar:5.4.21.Final]
at com.webapp.firstwebapp.FirstwebappApplication.doSomething(FirstwebappApplication.java:39) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888) ~[spring-webmvc-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:802) ~[spring-webmvc-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1061) ~[spring-webmvc-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:961) ~[spring-webmvc-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.37.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.37.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.0-SNAPSHOT.jar:5.3.0-SNAPSHOT]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1589) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]
2020-09-06 19:00:23.731 INFO 11976 --- [ Thread-5] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'

AS the error says "Error accessing field [private java.lang.Integer com.webapp.firstwebapp.Models.UserModel.id]
This is related to the scope for the attributes of UserModel entity
You have to make public access modifiers for attributes of UserModel Entity

class java.lang.String cannot be cast to class java.util.List (java.lang.String and java.util.List are in module java.base of loader 'bootstrap')

Trying to use ReplyingKafkaTemplate to return the response from the service, but keep getting an error java.lang.ClassCastException: class java.lang.String cannot be cast to class java.util.List (java.lang.String and java.util.List are in module java.base of loader 'bootstrap')
Listener
#KafkaListener(id = ProductTopicConstants.GET_PRODUCTS, topics = ProductTopicConstants.GET_PRODUCTS,splitIterables = false)
#SendTo
public List<Product> GetProducts(#Payload(required = false) String payload) {
List<Product> products = _productRepository.findAll();
return new ArrayList<>(products);
}
KafkaConfiguration
#Configuration
public class KafkaConfiguration {
#Bean
public ReplyingKafkaTemplate<String, String, List<Product>> replyer(ProducerFactory<String, String> pf,
ConcurrentKafkaListenerContainerFactory<String, List<Product>> containerFactory) {
containerFactory.setReplyTemplate(kafkaTemplate(pf));
ConcurrentMessageListenerContainer<String, List<Product>> container = replyContainer(containerFactory);
ReplyingKafkaTemplate<String, String, List<Product>> replyer = new ReplyingKafkaTemplate<>(pf, container);
return replyer;
}
#Bean
public ConcurrentMessageListenerContainer<String, List<Product>> replyContainer(
ConcurrentKafkaListenerContainerFactory<String, List<Product>> containerFactory) {
ConcurrentMessageListenerContainer<String, List<Product>> container =
containerFactory.createContainer(ProductTopicConstants.GET_PRODUCTS_CONTAINER);
container.getContainerProperties().setGroupId(ProductTopicConstants.GET_PRODUCTS_CONTAINER);
container.setBatchErrorHandler(new BatchLoggingErrorHandler());
return container;
}
#Bean
public KafkaTemplate<String, String> kafkaTemplate(ProducerFactory<String, String> pf) {
return new KafkaTemplate<>(pf);
}
#Bean
public NewTopic GetProducts() {
return TopicBuilder.name(ProductTopicConstants.GET_PRODUCTS).partitions(1).replicas(1).build();
}
#Bean
public NewTopic GetProductsContainer() {
return TopicBuilder.name(ProductTopicConstants.GET_PRODUCTS_CONTAINER).partitions(1).replicas(1).build();
}
}
service
#Service
public class ProductProducer implements IProductProducer{
private final ReplyingKafkaTemplate<String, String, List<Product>> _replyTemplate;
private static final Logger LOG = LoggerFactory.getLogger(ProductProducer.class);
public ProductProducer(ReplyingKafkaTemplate<String, String, List<Product>> replyTemplate) {
this._replyTemplate = replyTemplate;
}
#Override
public List<ProductViewModel> GetProducts() throws InterruptedException, ExecutionException, TimeoutException {
RequestReplyFuture<String, String, List<Product>> future =
this._replyTemplate.sendAndReceive(new ProducerRecord<>(ProductTopicConstants.GET_PRODUCTS, 0, null, null));
LOG.info(future.getSendFuture().get(10, TimeUnit.SECONDS).getRecordMetadata().toString());
List<Product> value = future.get(10, TimeUnit.SECONDS).value(); --> Getting an error over here
return List.of(new ProductViewModel("","",0,""));
}
}
Error
Getting an error over here List<Product> value = future.get(10, TimeUnit.SECONDS).value();
java.lang.ClassCastException: class java.lang.String cannot be cast to class java.util.List (java.lang.String and java.util.List are in module java.base of loader 'bootstrap')
at fete.bird.fetebirdproduct.service.producer.ProductProducer.GetProducts(ProductProducer.java:40) ~[main/:na]
at fete.bird.fetebirdproduct.api.v1.controller.ProductController.Products(ProductController.java:43) ~[main/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:879) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.36.jar:9.0.36]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:93) ~[spring-boot-actuator-2.3.1.RELEASE.jar:2.3.1.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[na:na]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na]
Configuration
spring:
profiles:
active: dev
kafka:
bootstrapAddress: localhost:9092
producer:
key-serializer: org.springframework.kafka.support.serializer.JsonSerializer
value-serializer: org.springframework.kafka.support.serializer.JsonSerializer
consumer:
key-deserializer: org.springframework.kafka.support.serializer.JsonDeserializer
value-deserializer: org.springframework.kafka.support.serializer.JsonDeserializer
auto-offset-reset: earliest
properties:
spring:
json:
trusted:
packages: *

I was missing '*' at the package
spring:
profiles:
active: dev
kafka:
bootstrapAddress: localhost:9092
producer:
key-serializer: org.springframework.kafka.support.serializer.JsonSerializer
value-serializer: org.springframework.kafka.support.serializer.JsonSerializer
consumer:
key-deserializer: org.springframework.kafka.support.serializer.JsonDeserializer
value-deserializer: org.springframework.kafka.support.serializer.JsonDeserializer
auto-offset-reset: earliest
properties:
spring:
json:
trusted:
packages: '*'

"Can't move a node from one state tree to another" when logging out

I am using a vaadin app and keep getting this error when I try to log out. I tried a lot of things to try to stop this but don't really know what to do:
java.lang.IllegalStateException: Can't move a node from one state tree to another. If this is intentional, first remove the node from its current state tree by calling removeFromTree
at com.vaadin.flow.internal.StateNode.doSetTree(StateNode.java:684) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.internal.StateNode.lambda$setTree$3(StateNode.java:364) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.internal.StateNode.visitNodeTree(StateNode.java:643) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.internal.StateNode.setTree(StateNode.java:364) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.internal.StateNode.setParent(StateNode.java:264) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.internal.nodefeature.NodeFeature.attachPotentialChild(NodeFeature.java:78) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.internal.nodefeature.StateNodeNodeList.add(StateNodeNodeList.java:53) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.internal.nodefeature.ElementChildrenList.add(ElementChildrenList.java:42) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.dom.impl.AbstractNodeStateProvider.insertChild(AbstractNodeStateProvider.java:102) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.dom.Node.insertChild(Node.java:250) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.dom.Node.appendChild(Node.java:141) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.component.internal.UIInternals.showRouteTarget(UIInternals.java:730) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.handle(AbstractNavigationStateRenderer.java:240) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.router.Router.handleNavigation(Router.java:223) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.router.Router.navigate(Router.java:194) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.router.Router.initializeUI(Router.java:92) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.server.BootstrapHandler.createAndInitUI(BootstrapHandler.java:1489) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.server.BootstrapHandler.synchronizedHandleRequest(BootstrapHandler.java:459) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:40) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.server.VaadinService.handleRequest(VaadinService.java:1540) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.server.VaadinServlet.service(VaadinServlet.java:247) ~[flow-server-2.1.3.jar:2.1.3]
at com.vaadin.flow.spring.SpringServlet.service(SpringServlet.java:95) ~[vaadin-spring-12.1.2.jar:na]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:352) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.springframework.web.servlet.mvc.ServletForwardingController.handleRequestInternal(ServletForwardingController.java:141) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:177) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:52) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:320) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:126) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:118) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:158) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.header.HeaderWriterFilter.doHeadersAfter(HeaderWriterFilter.java:92) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:77) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178) ~[spring-security-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1579) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
at java.base/java.lang.Thread.run(Thread.java:830) ~[na:na]
Whenver I click logout, I successfully get redirected to the LogIn View, but instead of logging in, it says "Assertion Error: No child Node found with id -1" and I get the afformentioned error. There is very little description.
Here is my LoginView Class:
#Route(value = "login")
public class LoginView extends LoginOverlay implements BeforeEnterObserver, AfterNavigationObserver {
public LoginView() {
LoginI18n i18n = LoginI18n.createDefault();
i18n.setHeader(new LoginI18n.Header());
i18n.getHeader().setTitle("FBLA Genie");
i18n.getHeader().setDescription("Login to the FBLA Genie App");
i18n.setAdditionalInformation(null);
i18n.setForm(new LoginI18n.Form());
i18n.getForm().setSubmit("Sign in");
i18n.getForm().setTitle("FBLA Genie");
i18n.getForm().setUsername("Username/ID");
i18n.getForm().setPassword("Password");
setI18n(i18n);
setAction("login");
setForgotPasswordButtonVisible(false);
}
#Override
public void beforeEnter(BeforeEnterEvent beforeEnterEvent) {
if (SecurityUtils.isUserLoggedIn()) {
beforeEnterEvent.forwardTo(Home.class);
} else {
setOpened(true);
}
}
#Override
public void afterNavigation(AfterNavigationEvent event) {
setError(
event.getLocation().getQueryParameters().getParameters().containsKey(
"error"));
}
}
My SecurityConfiguration:
#EnableWebSecurity
#Configuration
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {
private static final String LOGIN_PROCESSING_URL = "/login";
private static final String LOGIN_FAILURE_URL = "/login?error";
private static final String LOGIN_URL = "/login";
private static final String LOGOUT_SUCCESS_URL = "/login";
#Override
protected void configure(HttpSecurity http) throws Exception {
http.csrf().disable()
.requestCache().requestCache(new CustomRequestCache())
.and().authorizeRequests()
.requestMatchers(SecurityUtils::isFrameworkInternalRequest).permitAll()
.and().formLogin()
.loginPage(LOGIN_URL).permitAll()
.loginProcessingUrl(LOGIN_PROCESSING_URL)
.failureUrl(LOGIN_FAILURE_URL)
.successHandler(new SavedRequestAwareAuthenticationSuccessHandler())
.and().logout().logoutSuccessUrl(LOGOUT_SUCCESS_URL);
}
/**
* Configures the Login Information and credentials to the app.
* <p>
* Currently using temporary security for demonstration purposes.
*/
#Bean
#Override
/*
* Can be made more secure with this
* https://dzone.com/articles/spring-security-authentication
*/
public UserDetailsService userDetailsService() {
UserDetails admin...
return new InMemoryUserDetailsManager(admin);
}
#Override
public void configure(WebSecurity web) {
web.ignoring().antMatchers(
...
}
}
My SecurityUtils:
/**
* A Class for Util methods in security
*/
public final class SecurityUtils {
private SecurityUtils() {
// Util methods only
}
static boolean isFrameworkInternalRequest(HttpServletRequest request) {
final String parameterValue = request.getParameter(ApplicationConstants.REQUEST_TYPE_PARAMETER);
return parameterValue != null
&& Stream.of(ServletHelper.RequestType.values())
.anyMatch(r -> r.getIdentifier().equals(parameterValue));
}
public static boolean isUserLoggedIn() {
Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
return authentication != null
&& !(authentication instanceof AnonymousAuthenticationToken)
&& authentication.isAuthenticated();
}
public static boolean isAccessGranted(Class<?> securedClass) {
//Allows if there are no roles required
Secured secured = AnnotationUtils.findAnnotation(securedClass, Secured.class);
if (secured == null) return true;
//looks up role options
List<String> allowedRoles = Arrays.asList(secured.value());
Authentication userAuthentication = SecurityContextHolder.getContext().getAuthentication();
return userAuthentication.getAuthorities().stream()
.map(GrantedAuthority::getAuthority)
.anyMatch(allowedRoles::contains);
}
}
My CustomRequestCache:
class CustomRequestCache extends HttpSessionRequestCache {
#Override
public void saveRequest(HttpServletRequest request, HttpServletResponse response) {
if (!SecurityUtils.isFrameworkInternalRequest(request)) {
super.saveRequest(request, response);
}
}
}
My ConfigureUIServiceInitListener:
#Component
public class ConfigureUIServiceInitListener implements VaadinServiceInitListener {
#Override
public void serviceInit(ServiceInitEvent event) {
event.getSource().addUIInitListener(uiEvent -> { //
final UI ui = uiEvent.getUI();
ui.addBeforeEnterListener(this::beforeEnter);
});
}
private void beforeEnter(BeforeEnterEvent event) {
if (!SecurityUtils.isAccessGranted(event.getNavigationTarget())) {
if (SecurityUtils.isUserLoggedIn()) {
event.rerouteToError(NotFoundException.class);
} else {
event.rerouteTo(LoginView.class);
}
}
}
}
My MainView
#PWA(name = "",
shortName = "",
description = "This is the Application made by Shourya Bansal")
#PreserveOnRefresh
#UIScope
public class MainView extends AppLayout {
public static final Tab HOME_TAB = createTab(VaadinIcon.HOME, "Home", Home.class);
public static final Tab ADD_STUDENT_TAB = createTab(VaadinIcon.FILE_ADD, "Add a Student", CreateStudent.class);
public static final Tab ADD_HOURS_TAB = createTab(VaadinIcon.EDIT, "Add Hours to Student", AddHours.class);
public static final Tab VIEW_EDIT_TAB = createTab(VaadinIcon.EYE, "View and Edit Students", GetStudentInformation.class);
public static final Tab REPORT_TAB = createTab(VaadinIcon.RECORDS, "Generate Reports", Reports.class);
public static final Tab MAIL_TAB = createTab(VaadinIcon.MAILBOX, "Send Message", MailView.class);
public static final Tab DOC_TAB = createTab(VaadinIcon.QUESTION, "Documentation and FAQs", Documentation.class);
public static final Tabs tabs = getTabs();
public MainView() {
final Tabs tabs = new Tabs();
//Uses Tabs for Navigation
tabs.setOrientation(Tabs.Orientation.HORIZONTAL);
tabs.add(getAvailableTabs());
tabs.setFlexGrowForEnclosedTabs(1);
Image logo = new Image("https://github.com/Mastermind497/Shourya_FBLA/raw/master/logo/Logo.png", "Logo");
logo.setHeight("12em");
Button toGitHubPage = new Button("Go To GitHub Page");
toGitHubPage.addClickListener(buttonClickEvent -> UI.getCurrent().getPage().executeJs("window.open(\"https://github.com/Mastermind497/Shourya_FBLA\", \"_blank\", \"\");"));
//A Button for Toggling Dark Mode
final Button toggleButton = new Button("Dark Mode", VaadinIcon.MOON.create());
toggleButton.addClickListener(click -> {
ThemeList themeList = UI.getCurrent().getElement().getThemeList();
if (themeList.contains(Lumo.DARK)) {
themeList.remove(Lumo.DARK);
toggleButton.setText("Dark Mode");
toggleButton.setIcon(VaadinIcon.MOON.create());
} else {
themeList.add(Lumo.DARK);
toggleButton.setText("Light Mode");
toggleButton.setIcon(VaadinIcon.SUN_O.create());
}
});
HorizontalLayout buttons = new HorizontalLayout(toGitHubPage, toggleButton);
//Creates a Vertical Layout to store all the above components
VerticalLayout verticalLayout = new VerticalLayout();
//Adds component to Vertical Layout
verticalLayout.setSizeFull();
verticalLayout.add(logo);
verticalLayout.add(buttons);
verticalLayout.add(tabs);
//Aligns everything to the center
verticalLayout.setAlignItems(FlexComponent.Alignment.CENTER);
//Checks to see if main database is made. Makes if not
MySQLMethods.setUp();
addToNavbar(verticalLayout);
this.setDrawerOpened(false);
}
/**
* Generates the tabs for the Navbar
*
* #return The Tabs for the navBar
*/
public static Tabs getTabs() {
return new Tabs(getAvailableTabs());
}
/**
* Creates an ArrayList of the Tabs for Each page
*
* #return The Tabs
*/
private static Tab[] getAvailableTabs() {
final ArrayList<Tab> tabs = new ArrayList<>(7);
tabs.add(HOME_TAB);
tabs.add(ADD_STUDENT_TAB);
tabs.add(ADD_HOURS_TAB);
tabs.add(VIEW_EDIT_TAB);
tabs.add(REPORT_TAB);
tabs.add(MAIL_TAB);
tabs.add(DOC_TAB);
tabs.add(createTab(createLogoutLink()));
return tabs.toArray(new Tab[0]);
}
private static Anchor createLogoutLink() {
final Anchor a = populateLink(new Anchor(), VaadinIcon.LOCK, "Log Out");
a.setHref("/logout");
return a;
}
private static Tab createTab(VaadinIcon icon, String title, Class<? extends Component> viewClass) {
RouterLink routerLink = new RouterLink(null, viewClass);
routerLink.setHighlightCondition(HighlightConditions.sameLocation());
return createTab(populateLink(routerLink, icon, title));
}
private static Tab createTab(Component content) {
final Tab tab = new Tab();
tab.addThemeVariants(TabVariant.LUMO_ICON_ON_TOP);
tab.add(content);
return tab;
}
private static <T extends HasComponents> T populateLink(T a, VaadinIcon icon, String title) {
a.add(icon.create());
a.add(title);
return a;
}
}
My LoginView
/**
* A Class that allows logging in to the system. Huge potential for security, currently not using
* its full capabilities for demonstration purposes.
*/
#Route(value = "login")
#PageTitle("Login | FBLA Genie")
#PreserveOnRefresh
#UIScope
public class LoginView extends VerticalLayout implements BeforeEnterObserver {
/**
* The main login form
*/
final LoginForm login = new LoginForm();
/**
* Sets up the Login View and adds it to the its page
*/
public LoginView() {
addClassName("login-view");
setSizeFull();
setJustifyContentMode(FlexComponent.JustifyContentMode.CENTER);
setAlignItems(FlexComponent.Alignment.CENTER);
login.setAction("login");
Image logo = new Image("https://github.com/Mastermind497/Shourya_FBLA/raw/master/logo/Logo.png", "Logo");
logo.setHeight("24em");
add(
logo,
login
);
}
/**
* Turns on security, preventing access to the rest of the app before login is complete
*
* #param beforeEnterEvent A lambda event that is used by the login view to validate if the app should
* be open or remain closed
*/
#Override
public void beforeEnter(BeforeEnterEvent beforeEnterEvent) {
//Checks whether there is a parameter error
if (!beforeEnterEvent.getLocation()
.getQueryParameters()
.getParameters()
.getOrDefault("error", Collections.emptyList())
.isEmpty()) {
//makes error visible
login.setError(true);
}
}
}

Vaadin also doesn't support storing components in static fields. In my case that was the issue. (Vaadin 18).

You have faced this bug Error "Can't move a node from one state tree to another." when re-adding a previously removed component after refreshing with #PreserveOnRefresh.
It was already fixed by the team and should be released with the next minor version. (I would guess it's going to be 14.2.1). For now, as a workaround, you could remove the annotation

HttpClientErrorException on restTemplate.getForObject

I'm trying to get the data from "https://swapi.co/api/people/?format=json" and put it into a POJO using the RestTemplate.getForObject() method. I followed the following tutorial for consuming a RESTful webservice and adapted this for my own project: https://spring.io/guides/gs/consuming-rest/.
Upon following the tutorial somehow I got the code to work.. once.. I copied the exact code from the tutorial and I changed the source URL and the object to fit the data into. But when I try to create my own maven project, include all the needed dependencies I get a 403 forbidden Exception.
My code:
#RestController
public class CharacterListController {
#RequestMapping("/")
public SWData swData() {
RestTemplate restTemplate = new RestTemplate();
SWData swData = restTemplate.getForObject("https://swapi.co/api/people/?format=json", SWData.class);
return swData;
}
#JsonIgnoreProperties(ignoreUnknown = true)
public class SWData {
String next;
String results;
public String getNext() {
return next;
}
public void setNext(String next) {
this.next = next;
}
public String getResults() {
return results;
}
public void setResults(String results) {
this.results = results;
}
#Override
public String toString() {
return "SWData{" +
"next='" + next + '\'' +
", results='" + results + '\'' +
'}';
}
}
Stacktrace:
2019-05-28 15:00:28.800 ERROR 3643 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.client.HttpClientErrorException$Forbidden: 403 Forbidden] with root cause
org.springframework.web.client.HttpClientErrorException$Forbidden: 403 Forbidden
at org.springframework.web.client.HttpClientErrorException.create(HttpClientErrorException.java:83) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:122) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:102) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:778) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:736) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:670) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:311) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at io.github.BasPeter.SWAPI.rest.CharacterListController.swData(CharacterListController.java:16) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_211]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_211]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_211]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_211]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.17.jar:9.0.17]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_211]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_211]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.17.jar:9.0.17]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_211]
The most frustrating part is that the code functioned at some point. It looked like it worked using the gradle stuff provided by the tutorial, but wont work when using my own maven pom.
Somehow my request is rejected by the server (?), but i don't know why. I think my code is practically the same as the code in the tutorial..
-BP

You have some extra work to do :)
1- Change your SWData class so that it will mach the JSON document you recieve when you type the targeted url on your browser. So your class should look like the following:
#JsonIgnoreProperties(ignoreUnknown = true)
public class People {
private long count;
private String next;
private String previous;
private Infos results[];
// Constructors, getters and setters
// Extra: You can add the Lombock project to automatically generates, constructors // getters and setters
}
And here is the Infos class:
public class Infos {
private String name;
private long height;
private long mass;
private String hair_color;
private String skin_color;
private String eye_color;
private String birth_year;
private String gender;
private String homeworld;
private String films[];
private String species[];
private String vehicles[];
private String starships[];
private String created;
private String edited;
private String url;
// Constructors, getters and setters
}
2- Now, if you didn't notice, you're trying to access to an https url. So You have first to configure your RestTemplate in order to use SSL certificate for request. To do that, you should first add the Apache HttpClient dependancy to your pom.xml. Use the latest version for example:
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.8</version>
</dependency>
3- Once you have Apache HttpClient libraries in you project, you can now configure your RestTemplate. Here is how you do that:
// Imports
#RestController
public class CharacterListController {
#RequestMapping("/")
public SWData swData() {
CloseableHttpClient httpClient = HttpClients.custom()
.setSSLHostnameVerifier(new NoopHostnameVerifier())
.build();
HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();
requestFactory.setHttpClient(httpClient);
RestTemplate restTemplate = new RestTemplate(requestFactory);
SWData swData = restTemplate.getForObject("https://swapi.co/api/people/?format=json", SWData.class);
return swData;
}
}
4- That's all, you have only to run your Spring-Boot application now. Hope that will be helpful. Keep me updated with :)