Develop Reference

Facing java.lang.NullPointerException in spring boot application

I am trying to make Log In page using spring boot. I have three categories of user : Student, College , Company. When I check if user exist or not following code is working fine for Student but not working for other two. It gives NullPointerException with message Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException: Cannot invoke "com.springboot.controller.repository.CollegeRepo.findByEmail(String)" because "this.clgrepo" is null] with root cause
I am having three different tables for three categories in database. Please let me know if I am doing something wrong.
Following is my code:
Main Class
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
#EntityScan(basePackages="com.springboot.controller.model")
#EnableJpaRepositories(basePackages="com.springboot.controller.repository")
#SpringBootApplication
public class CunsultustodayWebServicesApplication {
public static void main(String[] args) {
SpringApplication.run(CunsultustodayWebServicesApplication.class, args);
}
}
LoginController.java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;
import com.springboot.controller.model.CollegeReg;
import com.springboot.controller.model.CompanyReg;
import com.springboot.controller.model.User;
import com.springboot.controller.repository.CollegeRepo;
import com.springboot.controller.repository.CompanyRepo;
import com.springboot.controller.repository.UserRepo;
import com.springboot.controller.services.StudentService;
#RestController
public class LoginController {
#Autowired(required=true)
private StudentRepo stdrepo;
private CollegeRepo clgrepo;
private CompanyRepo cmprepo;
#RequestMapping("/")
public ModelAndView checkMVC()
{
ModelAndView mav= new ModelAndView("Login");
return mav;
}
#RequestMapping("/login")
public ModelAndView loginHome(#RequestParam(value="email" ,required=true) String email, #RequestParam(value="password", required=true) String password, Model model)
{
StudentReg u= null;
u= stdrepo.findByEmail(email);
if(u!=null) {
model.addAttribute("email", email);
ModelAndView mav=new ModelAndView("HomePage");
return mav;
}
else {
CollegeReg c=null;
c=clgrepo.findByEmail(email);
if(c!=null) {
model.addAttribute("email", email);
ModelAndView mav=new ModelAndView("HomePage");
return mav;
}
else {
CompanyReg co=null;
co=cmprepo.findByEmail(email);
if(co!=null) {
model.addAttribute("email", email);
ModelAndView mav=new ModelAndView("HomePage");
return mav;
}
}
}
//model.addAttribute("error", "User not found");
ModelAndView mav=new ModelAndView("Login");
return mav;
}}
StudentRepo.java
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Service;
import com.springboot.controller.model.StudentReg;
#Service("StudentRepo")
public interface StudentRepo extends JpaRepository<StudentReg,Integer> {
StudentReg findByEmail(String email);
}
CollegeRepo.java
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Service;
import com.springboot.controller.model.CollegeReg;
#Service("CollegeRepo")
public interface CollegeRepo extends JpaRepository<CollegeReg,Integer>{
CollegeReg findByEmail(String email);
}
CompanyRepo.java
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Service;
import com.springboot.controller.model.CompanyReg;
#Service("CompanyRepo")
public interface CompanyRepo extends JpaRepository<CompanyReg,Integer> {
CompanyReg findByEmail(String email);
}
StudentReg.java
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Table;
import javax.persistence.Id;
#Entity
#Table(name="tbl_student_reg")
public class User {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name="std_id")
private int stdId;
#Column(name="email")
private String email;
#Column(name="password")
private String password;
public User() {}
public int getStdId() {
return stdId;
}
public void setStdId(int stdId) {
this.stdId = stdId;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
CollegeReg.java
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="tbl_colleges_reg")
public class CollegeReg {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name="clg_id")
private int clgId;
#Column(name="email")
private String email;
#Column(name="password")
private String password;
public CollegeReg() {
super();
}
public int getClgId() {
return clgId;
}
public void setClgId(int clgId) {
this.clgId = clgId;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
CompanyReg.java
package com.springboot.controller.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="tbl_companies_reg")
public class CompanyReg {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name="comp_id")
private int compId;
#Column(name="name")
private String name;
#Column(name="email")
private String email;
#Column(name="password")
private String password;
public CompanyReg() {
super();
}
public int getCompId() {
return compId;
}
public void setCompId(int compId) {
this.compId = compId;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
ErrorLog
java.lang.NullPointerException: Cannot invoke "com.springboot.controller.repository.CollegeRepo.findByEmail(String)" because "this.clgrepo" is null
at com.springboot.controller.resource.LoginController.loginHome(LoginController.java:52) ~[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:197) ~[spring-web-5.3.4.jar:5.3.4]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.4.jar:5.3.4]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.4.jar:5.3.4]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.4.jar:5.3.4]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.4.jar:5.3.4]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.4.jar:5.3.4]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1060) ~[spring-webmvc-5.3.4.jar:5.3.4]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:962) ~[spring-webmvc-5.3.4.jar:5.3.4]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.4.jar:5.3.4]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.3.4.jar:5.3.4]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:652) ~[tomcat-embed-core-9.0.43.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.4.jar:5.3.4]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.43.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.43.jar:9.0.43]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.4.jar:5.3.4]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.4.jar:5.3.4]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.4.jar:5.3.4]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.4.jar:5.3.4]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.4.jar:5.3.4]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.4.jar:5.3.4]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:887) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1684) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.43.jar:9.0.43]
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-9.0.43.jar:9.0.43]
at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na]
Please Help
Thanks!

Please, check your LoginController class.
You have #Autowired only on StudentRepo, but the rest 2 repoes don't have such annotation. They won't be autowired and will set as null by default.
Place #Aitowired annotation there also and check again.

The repository is not injected.
In LoginController either create a constructor with your repositories (preferable way) or mark fields as #Autowired.

LinkedMultiValueMap SpringFramework not iterating (error: cannot be cast to class)

I tryed to iterate a springframework.LinkedMultiValueMap, using:
iterator
foreach
stream.foreach
while
collections.values().foreach
sudoku(kidding)
But successively gets the error: cannot be cast to class
Here is the code:
package com.br.aloi.planner.controller;
import java.io.IOException;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import javax.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import com.br.aloi.planner.model.CSVModel;
import com.br.aloi.planner.model.CSVModelAttributes;
import com.br.aloi.planner.service.CSVService;
import com.br.aloi.planner.service.MapsApiService;
import com.google.gson.Gson;
import com.google.gson.JsonParser;
import com.google.maps.errors.ApiException;
#Controller
public class CustomerController {
String query;
#Autowired
private CSVService CSVservice;
#GetMapping("/planner")
public ModelAndView getPlanner(
#RequestParam(value = "sortBy", defaultValue = "id", required = false) String sortParam,
#RequestParam(value = "action", required = false) Optional<String> action)
throws ApiException, InterruptedException, IOException {
ModelAndView mv = new ModelAndView("/planner");
Optional<CSVModel> csvModel = CSVservice.findById(0); //0 is just for test the linkedvaluemap
/* this is the linkedvaluemap. Created converting a
"json linkedvaluemap string" to a linkedvaluemap, with gson's help. */
#SuppressWarnings("unchecked")
final LinkedMultiValueMap<Integer, CSVModelAttributes> attrib = new Gson().fromJson(
(csvModel.get().getAttributes()), LinkedMultiValueMap.class);
/* HERE i create a collection only with the values of each entry
of linkedvaluemap. the values are a list of CSVModelAttributes */
Collection<List<CSVModelAttributes>> valuesOfAttrib = attrib.values();
/* HERE i run each one collections values to get the list of
CSVModelAttribues and after get the attribute getValue() of each model */
for (List<CSVModelAttributes> value : valuesOfAttrib) {
int i = 0;
while (i < value.size()) {
query += value.get(i).getValue() + "+";
i++;
}
System.out.println(query);
System.out.println(MapsApiService.getLat(query));
}
mv.addObject("csvModels", CSVservice.sortBy(csvModels, sortParam));
return mv;
}
}
THE CSVModelAttributes class
package com.br.aloi.planner.model;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import com.google.gson.Gson;
#SuppressWarnings("serial")
#Entity(name = "tbl_modelAttributes")
public class CSVModelAttributes implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
#Column
private Integer modelId;
#Column(columnDefinition = "TEXT")
private String key;
#Column(columnDefinition = "TEXT")
private String value;
public CSVModelAttributes() {
}
public CSVModelAttributes(String key, String value) {
this.modelId = modelId;
this.key = key;
this.value = value;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getModelId() {
return modelId;
}
public void setModelId(Integer modelId) {
this.modelId = modelId;
}
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
#Override
public String toString() {
return new Gson().toJson(this);
}
}
THE CSVModel class
package com.br.aloi.planner.model;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.validation.constraints.Size;
import lombok.AllArgsConstructor;
#SuppressWarnings("serial")
#Entity(name = "tbl_csv")
#AllArgsConstructor
public class CSVModel implements Serializable {
#Id
private Integer id;
#Column(length = 1024)
#Size(max = 1024)
private String attributes;
public CSVModel() {
}
public Integer getId() {
return id;
}
public Integer setId(Integer id) {
return this.id = id;
}
public String getAttributes() {
return attributes;
}
public void setAttributes(String attributes) {
this.attributes = attributes;
}
}
THE ERROR:
java.lang.ClassCastException: class com.google.gson.internal.LinkedTreeMap cannot be cast to class com.br.aloi.planner.model.CSVModelAttributes (com.google.gson.internal.LinkedTreeMap and com.br.aloi.planner.model.CSVModelAttributes are in unnamed module of loader 'app')
at com.br.aloi.planner.controller.CustomerController.getPlanner(CustomerController.java:63) ~[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: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.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]
THE JSON STRING
{0=[{"key":"customerId","value":"4891"}, {"key":"companyName","value":"GIOVANE FERREIRA"}, {"key":"place","value":"AV AV TEPEQUEM SN"}, {"key":"neighborhood","value":"CENTRO"}, {"key":"city","value":"AMAJARI"}, {"key":"a","value":"RR"}, {"key":"postalCode","value":"69300000"}, {"key":"c","value":"ISENTO"}, {"key":"tradeName","value":"CIA DO GELO"}, {"key":"sectorId","value":"301"}, {"key":"region","value":"RR"}]}
2 days on without solution, i'm almost getting rid of this library and putting the apache commons collection.

#SuppressWarnings("unchecked")
final LinkedMultiValueMap<Integer, CSVModelAttributes> attrib = new Gson().fromJson(
(csvModel.get().getAttributes()), LinkedMultiValueMap.class);
This line has a problem.
{0=[{"key":"customerId","value":"4891"}, {"key":"companyName","value":"GIOVANE FERREIRA"}, {"key":"place","value":"AV AV TEPEQUEM SN"}, {"key":"neighborhood","value":"CENTRO"}, {"key":"city","value":"AMAJARI"}, {"key":"a","value":"RR"}, {"key":"postalCode","value":"69300000"}, {"key":"c","value":"ISENTO"}, {"key":"tradeName","value":"CIA DO GELO"}, {"key":"sectorId","value":"301"}, {"key":"region","value":"RR"}]}
The deserialized message has different data types then you're trying to typecast.
LinkedMultiValueMap<Integer, Object> linkedHashMap = (LinkedMultiValueMap<Integer, Object>)(new Gson().fromJson(json,LinkedMultiValueMap.class));
for(Entry<Integer, List<Object>> entry: linkedHashMap.entrySet()){
System.out.println(entry.getValue().get(0).getClass());
}
This code would print class com.google.gson.internal.LinkedTreeMap, this clearly says the data type in the list is something else, that's not CSVModelAttributes, in fact, it's a list of TreeMap.
You should define a model like this
public class CsvModels extends LinkedMultiValueMap<Integer, CSVModelAttributes> {}
Usage:
String json =
"{0=[{\"key\":\"customerId\",\"value\":\"4891\"}, {\"key\":\"companyName\",\"value\":\"GIOVANE FERREIRA\"}, {\"key\":\"place\",\"value\":\"AV AV TEPEQUEM SN\"}, {\"key\":\"neighborhood\",\"value\":\"CENTRO\"}, {\"key\":\"city\",\"value\":\"AMAJARI\"}, {\"key\":\"a\",\"value\":\"RR\"}, {\"key\":\"postalCode\",\"value\":\"69300000\"}, {\"key\":\"c\",\"value\":\"ISENTO\"}, {\"key\":\"tradeName\",\"value\":\"CIA DO GELO\"}, {\"key\":\"sectorId\",\"value\":\"301\"}, {\"key\":\"region\",\"value\":\"RR\"}]}";
CsvModels models = (new Gson().fromJson(json, CsvModels.class));
for (Entry<Integer, List<CSVModelAttributes>> entry : models.entrySet()) {
System.out.println(entry.getKey());
for (CSVModelAttributes attributes : entry.getValue()) {
System.out.println("\t" + attributes);
}
}

I tried running your code using Junits.
And it shows perfectly fine results.
So Now I see two possible issues.
The Gson version you are using might have some problems.
The String that you get from the entity might be incorrect.
Can you please check both of those things?

This is the problematic line:
final LinkedMultiValueMap<Integer, CSVModelAttributes> attrib = new Gson().fromJson(
(csvModel.get().getAttributes()), LinkedMultiValueMap.class);
Gson doesn't known in what class-type you want your values. It just known it needs to make a LinkedMultiValueMap.
Try something like:
Type mapType = new TypeToken<LinkedMultiValueMap<Integer, CSVModelAttributes>>(){}.getType();
attrib = new Gson().fromJson(csvModel.get().getAttributes()), mapType );
See here also

issue while trying to build an api with springboot [closed]

Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 2 years ago.
Improve this question
I am trying to develop a restful web service with spring boot but am getting errors and i have tried different things but don't know what the problem is nor how to fix it. The error message is pointing to my rest Controller class but i don't see why. Here is the error trace from my browser:
There was an unexpected error (type=Internal Server Error, status=500).
No message available
java.lang.NullPointerException
at com.dafe.spring.applogger.rest.UserLogRestController.findAll(UserLogRestController.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:893)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:798)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:94)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1639)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
here's the RestController class that is been pointed to by the error trace. I would appreciate some insights.
package com.dafe.spring.applogger.rest;
import java.util.List;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.dafe.spring.applogger.dao.UserLogDAO;
import com.dafe.spring.applogger.entity.UserLog;
#RestController
#RequestMapping("/api")
public class UserLogRestController {
private UserLogDAO userLogDao;
//inject logDao using constructor injection
public UserLogRestController(UserLogDAO theUserLogDao) {
}
//expose logs and return list of logs
#GetMapping("/logs")
public List<UserLog> findAll(){
return userLogDao.findAll();
}
}
Here is my Dao implementation class:
package com.dafe.spring.applogger.dao;
import java.util.List;
import javax.persistence.EntityManager;
import org.hibernate.Session;
import org.hibernate.query.Query;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import com.dafe.spring.applogger.entity.UserLog;
#Repository
public class UserLogDaoHibernateImplementation implements UserLogDAO {
//define field for entity manager
private EntityManager entityManager;
//set up constructor injection
#Autowired
public UserLogDaoHibernateImplementation(EntityManager theEntityManager) {
entityManager= theEntityManager;
}
#Override
#Transactional
public List<UserLog> findAll() {
//get the current hibernate session from entity manager
Session currentSession = entityManager.unwrap(Session.class);
//create a query
Query <UserLog> theQuery =
currentSession.createQuery("from log", UserLog.class);
//execute query and get result list
List<UserLog> userLog = theQuery.getResultList();
//return the results
return userLog;
}
}
here is my entity class
package com.dafe.spring.applogger.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="log")
public class UserLog {
//define field
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name="id")
private int id;
#Column(name="user_id")
private String userId;
#Column(name="session_id")
private String sessionId;
//define constructors
public UserLog() {
}
public UserLog(String userId, String sessionId) {
this.userId = userId;
this.sessionId = sessionId;
}
//define getters and setters
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getSessionId() {
return sessionId;
}
public void setSessionId(String sessionId) {
this.sessionId = sessionId;
}
#Override
public String toString() {
return "Log [id=" + id + ", userId=" + userId + ", sessionId=" + sessionId + "]";
}
//define toString
}
I would be grateful if you help me spot the problem or proffer a way out. Thank you.

I just got it, thanks for your contributions. After using the autowire annotation just above the private userLogDao and it did not work even though that was a valid suggestion, I spotted another error in my code which was that i used the wrong relative path on my GetMapping. Instead of "/userLog" I used "/log". Am so excited. Thanks all!

(Easy fix!;) You forgot to:
#Autowired //!! or similar
on your:
private UserLogDAO userLogDao;
..or respectivley/alternatively:
public UserLogRestController(/*#Autowired implicitely*/ UserLogDAO theUserLogDao) {
userLogDao = theUserLogDao;
}
..in your constructor.

fasterxml.jackson.databind Invalid Definition Exception

I am trying to do a post request using a URL which I've defined as the endpoint.
Controller Code:
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.abc.datacollection.Constants;
import com.abc.datacollection.dao.UserClickDataRepository;
import com.abc.datacollection.entity.UserClickData;
import com.abc.datacollection.entity.UserClickProjection;
import com.abc.datacollection.entity.UserClickProjection2;
#Controller
#RequestMapping(path="/user_click_data")
public class UserClickDataController {
#Autowired
private UserClickDataRepository userClickDataRepository;
/**
* this method adds user click data records into user_click_data table
* #param searchHisObj
* #return
*/
#CrossOrigin(origins = "*")
#PostMapping(path="/add", consumes = "application/json", produces = "application/json") // Map ONLY POST Requests
public #ResponseBody String addUserClickDataRecord (#RequestBody List<UserClickData> searchHisObj) {
userClickDataRepository.saveAll(searchHisObj);
System.out.println("saved click data:"+searchHisObj);
return Constants.STATUS_OK;
}
/**
* this method fetches all user click data records from user_click_data table
* #return
*/
#CrossOrigin(origins = "*")
#GetMapping(path="/all")
public #ResponseBody List<UserClickProjection> getAllUserClickDataRecords() {
return userClickDataRepository.findAllProjectedBy();
}
#CrossOrigin(origins = "*")
#GetMapping(path="/allsecond")
public #ResponseBody List<UserClickProjection2> getAllUserClickDataRecords2() {
return userClickDataRepository.findAllProjectedBy2();
}
}
DAO Code:
import java.util.List;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.CrudRepository;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.abc.datacollection.entity.UserClickData;
import com.abc.datacollection.entity.UserClickProjection;
import com.abc.datacollection.entity.UserClickProjection2;
import com.abc.datacollection.entity.UserProjection;
#JsonDeserialize(as = com.abc.datacollection.entity.UserClickData.class)
public interface UserClickDataRepository extends CrudRepository<UserClickData, Integer> {
public static final String FIND_QUERY =
"select new com.abc.datacollection.entity.UserClickData(user.u_type, COUNT(user.u_type)) from UserClickData user GROUP BY user.u_type ORDER BY COUNT(user.u_type) DESC";
#Query(value = FIND_QUERY)
//public List<UserProjection> getAllRequestResponseRecords();
List<UserClickProjection> findAllProjectedBy();
public static final String FIND_QUERY_2 =
"select new com.abc.datacollection.entity.UserClickData(user.u_type, COUNT(user.u_type), user.sys_updated_on) from UserClickData user GROUP BY user.sys_updated_on ORDER BY sys_updated_on DESC";
#Query(value = FIND_QUERY_2)
//public List<UserProjection> getAllRequestResponseRecords();
List<UserClickProjection2> findAllProjectedBy2();
}
Class:
import java.util.Date;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Transient;
#Entity // This tells Hibernate to make a table out of this class
public class UserClickData {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int sys_id;
private String u_search_term;
private String u_index;
private String u_sysid;
private String u_table;
private String u_facet_id;
private String department;
private Date sys_updated_on;
private String u_type;
private int flag;
private String u_user;
private String u_solr_request_response;
private String u_title;
private String u_page;
private String u_portal;
#Transient
private long count;
// public UserClickData(int sys_id, String u_search_term, String u_index, String u_sysid, String u_table, String u_facet_id, String department, Date sys_updated_on, String u_type, int flag, String u_user, String u_solr_request_response, String u_title, String u_page, String u_portal) {
// this.sys_id = sys_id;
// this.u_search_term = u_search_term;
// this.u_index = u_index;
// this.u_sysid = u_sysid;
// this.u_table = u_table;
// this.u_facet_id = u_facet_id;
// this.department = department;
// this.sys_updated_on = sys_updated_on;
// this.u_type = u_type;
// this.flag = flag;
// this.u_user = u_user;
// this.u_solr_request_response = u_solr_request_response;
// this.u_title = u_title;
// this.u_page = u_page;
// this.u_portal = u_portal;
// }
public UserClickData(String u_type, long count) { //, long count
this.u_type = u_type;
this.count=count;
}
public UserClickData(String u_type, long count, Date sys_updated_on ) {
this.u_type = u_type;
this.count=count;
this.sys_updated_on=sys_updated_on;
}
public long getCount() {
return count;
}
public void setCount(long count) {
this.count=count;
}
public int getSys_id() {
return sys_id;
}
public void setSys_id(int sys_id) {
this.sys_id = sys_id;
}
public String getU_search_term() {
return u_search_term;
}
public void setU_search_term(String u_search_term) {
this.u_search_term = u_search_term;
}
public String getU_index() {
return u_index;
}
public void setU_index(String u_index) {
this.u_index = u_index;
}
public String getU_sysid() {
return u_sysid;
}
public void setU_sysid(String u_sysid) {
this.u_sysid = u_sysid;
}
public String getU_table() {
return u_table;
}
public void setU_table(String u_table) {
this.u_table = u_table;
}
public String getU_facet_id() {
return u_facet_id;
}
public void setU_facet_id(String u_facet_id) {
this.u_facet_id = u_facet_id;
}
public String getDepartment() {
return department;
}
public void setDepartment(String department) {
this.department = department;
}
public Date getSys_updated_on() {
return sys_updated_on;
}
public void setSys_updated_on(Date sys_updated_on) {
this.sys_updated_on = sys_updated_on;
}
public String getU_type() {
return u_type;
}
public void setU_type(String u_type) {
this.u_type = u_type;
}
public int getFlag() {
return flag;
}
public void setFlag(int flag) {
this.flag = flag;
}
public String getU_user() {
return u_user;
}
public void setU_user(String u_user) {
this.u_user = u_user;
}
public String getU_solr_request_response() {
return u_solr_request_response;
}
public void setU_solr_request_response(String u_solr_request_response) {
this.u_solr_request_response = u_solr_request_response;
}
public String getU_title() {
return u_title;
}
public void setU_title(String u_title) {
this.u_title = u_title;
}
public String getU_page() {
return u_page;
}
public void setU_page(String u_page) {
this.u_page = u_page;
}
public String getU_portal() {
return u_portal;
}
public void setU_portal(String u_portal) {
this.u_portal = u_portal;
}
}
Error Stack:
2019-10-16 16:02:29.394 ERROR 9058 --- [nio-9000-exec-6] 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.http.converter.HttpMessageConversionException: Type definition error: [simple type, class com.servicenow.datacollection.entity.UserClickData]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.servicenow.datacollection.entity.UserClickData` (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)
at [Source: (PushbackInputStream); line: 1, column: 3] (through reference chain: java.util.ArrayList[0])] with root cause
com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.abc.datacollection.entity.UserClickData` (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)
at [Source: (PushbackInputStream); line: 1, column: 3] (through reference chain: java.util.ArrayList[0])
at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:67) ~[jackson-databind-2.9.9.jar!/:2.9.9]
at com.fasterxml.jackson.databind.DeserializationContext.reportBadDefinition(DeserializationContext.java:1452) ~[jackson-databind-2.9.9.jar!/:2.9.9]
at com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1028) ~[jackson-databind-2.9.9.jar!/:2.9.9]
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1297) ~[jackson-databind-2.9.9.jar!/:2.9.9]
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:326) ~[jackson-databind-2.9.9.jar!/:2.9.9]
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159) ~[jackson-databind-2.9.9.jar!/:2.9.9]
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:286) ~[jackson-databind-2.9.9.jar!/:2.9.9]
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:245) ~[jackson-databind-2.9.9.jar!/:2.9.9]
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:27) ~[jackson-databind-2.9.9.jar!/:2.9.9]
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4013) ~[jackson-databind-2.9.9.jar!/:2.9.9]
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3084) ~[jackson-databind-2.9.9.jar!/:2.9.9]
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:239) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:227) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:204) ~[spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:157) ~[spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:130) ~[spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:126) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:167) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) ~[spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) ~[spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039) ~[spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) ~[spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:88) ~[spring-boot-actuator-2.1.6.RELEASE.jar!/:2.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:114) ~[spring-boot-actuator-2.1.6.RELEASE.jar!/:2.1.6.RELEASE]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:104) ~[spring-boot-actuator-2.1.6.RELEASE.jar!/:2.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.21.jar!/:9.0.21]
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-9.0.21.jar!/:9.0.21]
at java.base/java.lang.Thread.run(Thread.java:835) ~[na:na]
URL I'm trying to access: http://127.0.0.1:9000/user_click_data/add
Payload I'm trying to post:
[
{
"u_search_term":"madrid",
"u_index":1,
"u_sysid":"0db06114db4cc8904819fb2439961991",
"u_table":"",
"u_facet_id":"",
"department":"",
"sys_updated_on":"2019-10-16T10:32:29.108Z",
"u_type":"METROCOMM",
"flag":0,
"u_user":"",
"u_solr_request_response":"\"madrid\" OR madrid",
"u_title":"",
"u_page":"",
"u_portal":""
}
]
As you can see, I've added #JsonDeserialize annotation which I imported from com.fasterxml.jackson.databind.annotation.JsonDeserialize.
Can someone tell me what I'm doing wrong here. Thanks.

Declare a default constructor inside your class.

Can't update a field in a PostgreSQL table

I'm trying to build a question answer website like Stack Overflow, to learn how RESTful web services work, it is my first time writing web services, I have already made the controller for asking the questions and answering them.
But there's a problem, which I had when I was making a REST Endpoint for the upvote, so whenever a user upvotes a question, I have to update the number of votes a question has in the questions table (at the start it is zero) but when I'm trying to hit the Endpoint for Upvote the update query which I have written throws an error and shows me the error page.
The error thrown:
org.postgresql.util.PSQLException: No results were returned by the query.
at org.postgresql.jdbc.PgPreparedStatement.executeQuery(PgPreparedStatement.java:107) ~[postgresql-42.2.5.jar:42.2.5]
at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeQuery(ProxyPreparedStatement.java:52) ~[HikariCP-3.2.0.jar:na]
at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeQuery(HikariProxyPreparedStatement.java) ~[HikariCP-3.2.0.jar:na]
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:60) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.loader.Loader.getResultSet(Loader.java:2167) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1930) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1892) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.loader.Loader.doQuery(Loader.java:937) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:340) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.loader.Loader.doList(Loader.java:2689) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.loader.Loader.doList(Loader.java:2672) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2506) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.loader.Loader.list(Loader.java:2501) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:338) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.internal.SessionImpl.listCustomQuery(SessionImpl.java:2223) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.internal.AbstractSharedSessionContract.list(AbstractSharedSessionContract.java:1069) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.query.internal.NativeQueryImpl.doList(NativeQueryImpl.java:170) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1505) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.hibernate.query.internal.AbstractProducedQuery.getSingleResult(AbstractProducedQuery.java:1553) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
at org.springframework.data.jpa.repository.query.JpaQueryExecution$SingleEntityExecution.doExecute(JpaQueryExecution.java:221) ~[spring-data-jpa-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:91) ~[spring-data-jpa-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:136) ~[spring-data-jpa-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:125) ~[spring-data-jpa-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:605) ~[spring-data-commons-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$invoke$3(RepositoryFactorySupport.java:595) ~[spring-data-commons-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:595) ~[spring-data-commons-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:59) ~[spring-data-commons-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:295) ~[spring-tx-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98) ~[spring-tx-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:138) ~[spring-data-jpa-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93) ~[spring-aop-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:61) ~[spring-data-commons-2.1.9.RELEASE.jar:2.1.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at com.sun.proxy.$Proxy100.vote(Unknown Source) ~[na:na]
at com.demo.beans.controller.QuestionController.upvoteQuestion(QuestionController.java:222) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_91]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_91]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_91]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_91]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.21.jar:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:151) ~[spring-session-core-2.1.7.RELEASE.jar:2.1.7.RELEASE]
at org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:85) ~[spring-session-core-2.1.7.RELEASE.jar:2.1.7.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853) [tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) [tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.21.jar:9.0.21]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_91]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_91]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.21.jar:9.0.21]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_91]
Code for the QuestionRepository which is used to update the votes:
package com.demo.beans.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
import org.springframework.stereotype.Repository;
import com.demo.beans.Question;
#Repository
public interface QuestionRepository extends JpaRepository<Question, Long> {
#Query(value = "SELECT * from questions where pr_key=:pr_key", nativeQuery = true)
public Question findByPrKey(#Param("pr_key") String prKey);
#Query(value = "UPDATE questions SET questionvotes=:questionvotes where pr_key=:pr_key", nativeQuery=true)
public void changeVotes(#Param("questionvotes") int questionVotes, #Param("pr_key") String prKey);
}
Here the second query is responsible for updating the votes.
I'm calling this function in the QuestionsController in this method:
#RequestMapping("/upvoteQuestion")
public String upvoteQuestion(#CookieValue(value = "username", defaultValue = "null") String username,
#CookieValue(value = "password", defaultValue = "null") String password, #Valid QuestionVote questionVote) {
System.out.println("works" + questionVote.getQuestionPrKey() + " " + questionVote.getUserPrKey());
if (!username.equals("null") && !password.equals("null")) {
// checks whether there is user with the username and password given
// by the cookie
if (userRepository.checkWhetherAccountExists(username, password).get(0) != null) {
questionVote.setUserPrKey(userRepository.findUsingUsername(username).getPrKey());
if (questionVoteRepository.checkUpvote(questionVote.getQuestionPrKey(), questionVote.getUserPrKey()).equals("false")) {
questionVoteRepository.vote("true", "false", questionVote.getQuestionPrKey(),questionVote.getUserPrKey());
System.out.println("Question PrKey: " + questionVote.getQuestionPrKey());
questionRepository.changeVotes(13, questionVote.getQuestionPrKey());
}
}
}
return "redirect:/questions/"+questionVote.getQuestionPrKey();
}
In the above code, the following line throws the error:
questionRepository.changeVotes(13, questionVote.getQuestionPrKey());
My Question class looks like this:
package com.demo.beans;
import java.sql.Time;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import org.hibernate.annotations.GenericGenerator;
#Entity
#Table(name = "questions")
public class Question {
#Id
#GeneratedValue(generator = "uuid")
#GenericGenerator(name = "uuid", strategy = "uuid2")
#Column(name = "PR_KEY")
private String prKey;
#Column(name = "postedby")
private String postedBy; // pr_key of the person who posted the question
#Column(name = "postedbyusername")
private String postedByUsername; // username of the person who posted the
// question
#Column(name = "title", columnDefinition = "varchar(1000)")
private String title; // title of the question
#Column(name = "content", columnDefinition = "varchar(10000)")
private String content; // content of the question
#Column(name = "code", columnDefinition = "varchar(10000)")
private String code; // code (if included) of the question
#Column(name = "viewscount")
private int views_count; // views count of the question
#Column(name = "answercount")
private int answer_count; // answers count of the question
#Column(name = "tag")
private String tag; // tag which a question is tagged
#Column(name = "questionaskedtime")
private String questionAskedTime; // time at which the question was asked
#Column(name = "questionlastactivetime")
private String questionLastActiveTime; // time at which the question was
// active the last time
#Column(name = "questionvotes")
private int questionVotes; // number of votes on the question
#Column(name = "acceptedanswerstatus")
private String acceptedAnswerStatus; // whether the question has an accepted
// answer
#Column(name = "questionlink")
private String questionLink;
public Question() {
}
public Question(String postedBy, String title, String content, String code, int views_count, int answer_count,
String tag, String questionAskedTime, String questionLastActiveTime, int questionVotes,
String acceptedAnswerStatus, String questionLink, String postedByUsername) {
super();
this.title = title;
this.content = content;
this.code = code;
this.views_count = views_count;
this.answer_count = answer_count;
this.tag = tag;
this.questionAskedTime = questionAskedTime;
this.questionLastActiveTime = questionLastActiveTime;
this.questionVotes = questionVotes;
this.acceptedAnswerStatus = acceptedAnswerStatus;
this.questionLink = questionLink;
this.postedByUsername = postedByUsername;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public int getViews_count() {
return views_count;
}
public void setViews_count(int views_count) {
this.views_count = views_count;
}
public int getAnswer_count() {
return answer_count;
}
public void setAnswer_count(int answer_count) {
this.answer_count = answer_count;
}
public String getTags() {
return tag;
}
public void setTag(String tag) {
this.tag = tag;
}
public String getQuestionAskedTime() {
return questionAskedTime;
}
public void setQuestionAskedTime(String questionAskedTime) {
this.questionAskedTime = questionAskedTime;
}
public String getQuestionLastActiveTime() {
return questionLastActiveTime;
}
public void setQuestionLastActiveTime(String questionLastActiveTime) {
this.questionLastActiveTime = questionLastActiveTime;
}
public int getQuestionVotes() {
return questionVotes;
}
public void setQuestionVotes(int questionVotes) {
this.questionVotes = questionVotes;
}
public String getAcceptedAnswerStatus() {
return acceptedAnswerStatus;
}
public void setAcceptedAnserStatus(String acceptedAnswerStatus) {
this.acceptedAnswerStatus = acceptedAnswerStatus;
}
public String getPrKey() {
return prKey;
}
public void setPrKey(String prKey) {
this.prKey = prKey;
}
public String getPostedByUsername() {
return postedByUsername;
}
public void setPostedByUsername(String postedByUsername) {
this.postedByUsername = postedByUsername;
}
public String getQuestionLink() {
return questionLink;
}
public void setQuestionLink(String questionLink) {
this.questionLink = questionLink;
}
}
And yes I have data in the table. What am I doing wrong, and how can I resolve it?
I have tried adding #Modifying too, still it throws the same error.
Edit
I have used the UPDATE Query to update other fields in a different table and it works, don't know why this doesn't work.
questionVoteRepository.vote("true", "false", questionVote.getQuestionPrKey(),questionVote.getUserPrKey());
check the above line of code in the method upvoteQuestion which added above, this lines works perfectly, updating the question_votes table.
The QuestionVote POJO looks like this:
package com.demo.beans;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import org.hibernate.annotations.GenericGenerator;
#Entity
#Table(name="question_votes")
public class QuestionVote {
#Id
#GeneratedValue(generator = "uuid")
#GenericGenerator(name = "uuid", strategy = "uuid2")
#Column(name = "PR_KEY")
private String prKey;
#Column(name="question_pr_key")
private String questionPrKey;
#Column(name="user_pr_key")
private String userPrKey;
#Column(name="upvote")
private String upvote;
#Column(name="downvote")
private String downvote;
public QuestionVote() {
}
public QuestionVote(String prKey, String questionPrKey, String userPrKey, String upvote, String downvote) {
super();
this.prKey = prKey;
this.questionPrKey = questionPrKey;
this.userPrKey = userPrKey;
this.upvote = upvote;
this.downvote = downvote;
}
public String getPrKey() {
return prKey;
}
public void setPrKey(String prKey) {
this.prKey = prKey;
}
public String getQuestionPrKey() {
return questionPrKey;
}
public void setQuestionPrKey(String questionPrKey) {
this.questionPrKey = questionPrKey;
}
public String getUserPrKey() {
return userPrKey;
}
public void setUserPrKey(String userPrKey) {
this.userPrKey = userPrKey;
}
public String getUpvote() {
return upvote;
}
public void setUpvote(String upvote) {
this.upvote = upvote;
}
public String getDownvote() {
return downvote;
}
public void setDownvote(String downvote) {
this.downvote = downvote;
}
}
When a question is added I add a row in the question_votes table too and set the upvote and downvote column for that row as false, false. When the question is upvoted I update the two tables questions and question_votes the question_votes table gets updated successfully but the questions table doesn't gets updated.
The QuestionVoteRepository looks like this:
package com.demo.beans.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
import org.springframework.stereotype.Repository;
import com.demo.beans.QuestionVote;
#Repository
public interface QuestionVoteRepository extends JpaRepository<QuestionVote, Long>{
#Query(value = "SELECT exists (SELECT 1 from question_votes where question_pr_key=:question_pr_key and user_pr_key=:user_pr_key)", nativeQuery=true)
public String checkWhetherRowExists(#Param("question_pr_key") String questionPrKey,
#Param("user_pr_key") String userPrKey);
#Query(value = "SELECT upvote from question_votes where question_pr_key=:question_pr_key and user_pr_key=:user_pr_key", nativeQuery=true)
public String checkUpvote(#Param("question_pr_key") String questionPrKey, #Param("user_pr_key") String userPrKey);
#Query(value = "SELECT downvote from question_votes where question_pr_key=:question_pr_key and user_pr_key=:user_pr_key", nativeQuery=true)
public String checkDownvote(#Param("question_pr_key") String questionPrKey, #Param("user_pr_key") String userPrKey);
#Query(value = "UPDATE question_votes SET upvote=:upvote, downvote=:downvote where question_pr_key=:question_pr_key and user_pr_key=:user_pr_key", nativeQuery=true)
public void vote(#Param("upvote") String upvote, #Param("downvote") String downvote,
#Param("question_pr_key") String questionPrKey, #Param("user_pr_key") String userPrKey);
}

You need to add #Modifying to changeVotes method in the repository to mark that this is an update query and no results are expected back.
https://docs.spring.io/spring-data/jpa/docs/current/api/org/springframework/data/jpa/repository/Modifying.html