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Spring boot application returns 404 without entering controller class

Spring boot application returns 404 Not found error when calling API endpoints without even entering the controller class
I have gone through the possible solutions which can be found on the StackOverflow
possible solutions I have tested
added and removed #RequestMapping at the class level
tested with both
GetMapping("/get")
and
RequestMapping("/get")
and even with
GetMapping(value = "/get")
added #ComponentScan even when my folder structure is as per the guidelines.
tried with ResponseEntity<Object> and #RequestBody Annotation
I've tried almost all of the solutions I got from various platforms. Spring boot application API endpoints should call the corresponding methods based on their paths configured. But in my application, it throws an error with '404 Not Found' when any endpoint called. It seems the endpoints are not registered in the spring application
controller Class
#RestController
#RequestMapping(BACK_OFFICE_BASE_PATH)
public class ManagementController {
#Autowired
ManagementService managementService;
#GetMapping( SLASH_PATH)
public List<RateTemp> getUpdateRequests(){
return managementService.getUpdateRequests();
}
#PostMapping( SLASH_PATH)
public RateTemp addRate(#RequestBody RateTemp body) throws BadRequestException {
if(body != null){
return managementService.addRate(body);
}else throw new BadRequestException(ILLEGAL_REQUEST_FIELDS,"");
}
}
pom.xml
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.0</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<java.version>1.8</java.version>
<springfox-version>3.0.0</springfox-version>
<log4j2.version>2.16.0</log4j2.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.2.3.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.7.0</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-rest-hal-explorer</artifactId>
</dependency>
<dependency>
<groupId>com.warrenstrange</groupId>
<artifactId>googleauth</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-ehcache</artifactId>
<exclusions>
<exclusion>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<!--springfox for swagger -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-oas</artifactId>
<version>${springfox-version}</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>${springfox-version}</version>
</dependency>
<dependency>
<groupId>com.github.joschi.jackson</groupId>
<artifactId>jackson-datatype-threetenbp</artifactId>
<version>2.6.4</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>

I've found a solution for my problem without even understanding it.
Anyway, it started working when I assigned a separate path for each and every method.
In my previous code, I have assigned the same path value for different HTTP methods(GET, POST, PUT, etc.). I have done this before, but I never got this error ever. Im trying to understand the cause of this error.
thanks for your suggestion
#RestController
#RequestMapping(BACK_OFFICE_BASE_PATH)
public class ManagementController {
#Autowired
ManagementService managementService;
#GetMapping( SLASH_PATH + "add")
public List<RateTemp> getUpdateRequests(){
return managementService.getUpdateRequests();
}
#PostMapping( SLASH_PATH + "update")
public RateTemp addRate(#RequestBody RateTemp body) throws BadRequestException {
if(body != null){
return managementService.addRate(body);
}else throw new BadRequestException(ILLEGAL_REQUEST_FIELDS,"");
}
}

Spring boot #Valid does not work properly

I'm facing a problem with Spring boot validation. Currently, I'm using Oracle JDK 11.0.12 and Spring boot 2.5.4 to build my project. I added constraints to validate the fields but it does not work. My code here:
import lombok.Data;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotNull;
import java.io.Serializable;
#Data
public class LoginFormDTO implements Serializable {
private static final long serialVersionUID = 1L;
#NotBlank(message = "Login must not be blank")
private String login;
#NotNull(message = "Password must be provided")
private String password;
private boolean rememberMe = false;
}
#RestController
#RequestMapping("/api")
public class AccountResource {
// Logger and autowired components
#PostMapping("/authenticate")
#ResponseBody
public ResponseEntity<JWTToken> authorize(#Valid #RequestBody LoginFormDTO account) {
// Some code lines
return ResponseEntity.ok().body(new JWTToken(jwt));
}
}
Dependencies in pom.xml
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web-services</artifactId>
</dependency>
<dependency>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-core</artifactId>
</dependency>
<dependency>
<groupId>org.thymeleaf.extras</groupId>
<artifactId>thymeleaf-extras-springsecurity5</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.googlecode.libphonenumber</groupId>
<artifactId>libphonenumber</artifactId>
<version>8.12.31</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-boot-starter</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-bean-validators</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.9.1</version>
</dependency>
</dependencies>
I expect when I send POST request with body
{
"login": null, // or empty string "", or blank string " "
"password": "string",
"rememberMe": true
}
then the server should validate fields then throw exceptions or errors (because of null constraint violation) before executing code in my authorize(#Valid #RequestBody LoginFormDTO account) function, but it does not. So what's wrong with spring validation or am I missing something?

You can simplify your Controller. You have way too many annotations doing the same thing and even some weird stuff (you return ResponseEntity but then you tell Spring that the return of the method should be the Response Body).
This may not fix the #Valid issue but for sure will make it simpler:
#RestController
#RequestMapping("/api")
public class AccountResource {
// Logger and autowired components
#PostMapping("/authenticate")
#ResponseStatus(HttpStatus.OK)
public JWTToken authorize(#Valid #RequestBody LoginFormDTO account) {
// Some code lines
return new JWTToken(jwt);
}
}
#RestController is itself annotated with #Controller and #ResponseBody, which means that #RequestMapping methods assume #ResponseBody semantics by default, so you don't need to explicitly add it.

I found out that my SwaggerConfig class should use BeanValidatorPluginsConfiguration.class instead of SpringValidatorAdapter.class in #Import({}). Now my validator works normally. Thank João Dias for supporting me in figuring it out.

java.lang.ClassNotFoundException: org.springframework.dao.support.PersistenceExceptionTranslator

I have created a spring boot web project using a 2.1.8 version of boot from https://start.spring.io/.
When I run the project, it throws the error:
java.lang.ClassNotFoundException:
org.springframework.dao.support.PersistenceExceptionTranslator
Please help me out in resolving this issue.
Pom.xml
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
Application starter class code:
#SpringBootApplication
#EnableCaching
#EnableAutoConfiguration
#ComponentScan("com.mkcl.misServerMonitor")
public class MisServerMonitorApplication {
public static void main(String[] args) {
SpringApplication.run(MisServerMonitorApplication.class, args);
}
}

Katharsis in combination with Spring Boot

I have implemented a REST API using Spring Boot (version 1.3.6.RELEASE), which is working as expected. However I would like to add JSON API support to my application.
The problem is that I get a 404 when trying to execute a GET on a Katharsis resource.
The dependencies in pom.xml look as follows (I use Spring Security too):
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
<exclusion>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-integration</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-hateoas</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>org.codehaus.woodstox</groupId>
<artifactId>woodstox-core-asl</artifactId>
<version>4.4.1</version>
</dependency>
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache</artifactId>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>${hsqldb.version}</version>
</dependency>
<!--SpringFox dependencies -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>${springfox-version}</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>${springfox-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
</dependency>
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
</dependency>
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity</artifactId>
</dependency>
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity-tools</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>dumbster</groupId>
<artifactId>dumbster</artifactId>
<version>1.6</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.katharsis</groupId>
<artifactId>katharsis-spring</artifactId>
<version>2.6.0</version>
</dependency>
<dependency>
<groupId>org.reflections</groupId>
<artifactId>reflections</artifactId>
<version>0.9.9</version>
</dependency>
</dependencies>
My application initialisation class is as follows:
#SpringBootApplication
#Configuration
#EnableAutoConfiguration(exclude = WebMvcAutoConfiguration.class)
#EnableSwagger2
#ComponentScan(basePackages = "com.myapp")
#Import({KatharsisConfigV2.class})
public class Application {
public static void main(String[] args) {
ApplicationContext ctx = SpringApplication.run(Application.class, args);
}
}
The resource class:
#ApiModel(description = "")
#JsonApiResource(type = "foo-data")
public class FooData extends DomainRepresentation {
#JsonApiId
private String id = null;
#JsonProperty
private String name = null;
// .... getters & setters
}
ResourceRepository class:
#JsonApiResourceRepository(FooData.class)
#Component
public class FooDataKatApi extends MyApi {
#Autowired
private FooDataService fooDataService;
#JsonApiFindOne
public FooData foodataIdGet(String id, QueryParams requestParams) {
FooData result = fooDataService.getFooDataById(id);
return result;
}
}
If I add Spring #ResourceMappings than I get data back but without Katharsis additions like "link", etc. It's as if the API call is not being picked up by Katharsis, but it's handled by Spring.
Any help would be appreciated.
-- EDITTED --
The FooDataService is as follows:
#Service
public class FooDataService extends MyService {
#Autowired
private FooDataRepository fooDataRepository;
public FooData getFooDataById(String id) {
FooDataEnt fooDataEnt = fooDataRepository.findByFooDataId(id);
if (fooDataEnt != null) {
return convertFooDataEntToFooData.apply(fooDataEnt);
}
throw new NotFoundException("Foo not found");
}
}
The FooDataRepository extends Spring's PagingAndSortingRepository.
Katharsis config in application.yaml:
katharsis:
resourcePackage: com.my.package
domainName: http://localhost:8080
pathPrefix: /api/kat
The request and response from PostMan
-- UPDATE 1 --
Apparently the configured value for katharsis.pathPrefix was not correct. Web application's context-root is "/api" and the value of katharsis.pathPrefix should be only "/kat".
My next problem is that a RepositoryNotFoundException is being throw while handling the request, while the Resource class is found already.

I don't see your foo data service implementation anywhere. However, I am 99% sure you're not passing the json api accept type.
Accept: application/vnd.api+json

I solved the riddle by debugging the code and finding out that my Katharsis config was not correct. Katharsis only picked up the resource classes but not the resource repository classes. When I changed the katharsis.resourcePackage to a higher level where the resource repositories resided, the problem got solved and Katharsis picked up all related annotated classes.

Why do I have ambiguous handler methods mapped for HTTP path in my Spring Boot Rest Data Application?

I have done nothing special until now, but got this annoying Exception:
java.lang.IllegalStateException: Ambiguous handler methods mapped for HTTP path 'http://localhost:8080/directoryWatches': {public org.springframework.http.ResponseEntity org.springframework.data.rest.webmvc.RepositoryEntityController.headCollectionResource(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.data.rest.webmvc.support.DefaultedPageable) throws org.springframework.web.HttpRequestMethodNotSupportedException, public org.springframework.hateoas.Resources org.springframework.data.rest.webmvc.RepositoryEntityController.getCollectionResource(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.data.rest.webmvc.support.DefaultedPageable,org.springframework.data.domain.Sort,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler) throws org.springframework.data.rest.webmvc.ResourceNotFoundException,org.springframework.web.HttpRequestMethodNotSupportedException}
Here is my entity:
#Entity
public class DirectoryWatch {
#Id
#GeneratedValue
private long id;
#Column(unique = true)
private String name;
//setters, getters and default constructor...
}
And my DirectoryWatchRepository:
#RepositoryRestResource
public interface DirectoryWatchRepository extends PagingAndSortingRepository<DirectoryWatch, Long> {
}
The exception occurs, when I open the HAL Browser and try to open the NON-GET HTTP Methods:
Snippets of my pom file:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.0.M2</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
Dependencies:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-actuator-docs</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-rest-hal-browser</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-hateoas</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-remote-shell</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.restdocs</groupId>
<artifactId>spring-restdocs-mockmvc</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>2.11.0</version>
</dependency>
</dependencies>
Has anyone a helping idea?
Thank you,
Christian

This suspiciously looks like the regression in Spring Framework 4.3 RC1 that I've reported here. The issue is already fixed and the upcoming Spring Boot 1.4 M3 is going to include the fixed version.
The release Boot should be available in a couple of days. Until that has happened you could just manually upgrade to Spring Framework 4.3 RC2.