(type=Internal Server Error, status=500). No converter found for return value of type: class com.test.SearchVO

(type=Internal Server Error, status=500). No converter found for return value of type: class com.test.SearchVO - spring

I have below source code and I am trying to run it in spring boot, but the binding is not happen and it is complaining it is not able to find a converter.
There was an unexpected error:
(type=Internal Server Error, status=500). No converter found for return value of type: class com.test.SearchVO.
As far as I know the spring boot does not require the jackson jars to be in path. But I have tried adding that still it is not working. I tried similar issues in different forums could not find any good answers, please help.
Is the understanding springboot will taken care of automatic conversion?
I tried posting the values I am not able to receive the value etc.
I have worked on spring application and trying spring boot for first time and as there is no spring dispatcher.
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
#RestController
#EnableAutoConfiguration
public class SpringAnnotationTest {
#RequestMapping(value = "/searchUser", method = RequestMethod.POST)
public SearchVO searchUser(#RequestBody SearchVO user) {
System.out.println(user.toString());
return user;
}
#RequestMapping(value = "/getSearchUser", method = RequestMethod.GET)
public SearchVO getSearchUser() {
SearchVO user = new SearchVO();
System.out.println(user.toString());
return user;
}
public static void main(String[] args) throws Exception {
SpringApplication.run(SpringAnnotationTest.class, args);
}
}
My pom
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.test</groupId>
<artifactId>test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>test</name>
<description>test</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.3.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<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-devtools</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-actuator</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-test</artifactId>
<!-- <scope>test</scope> -->
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.4.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.4.3</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
This is the VO Class.
public class SearchVO implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
private String empid;
private String nickname;
private String email;
private String phone;
#Override
public String toString() {
// TODO Auto-generated method stub
return "<EMPID>"+this.empid+"<NICKNAME>"+nickname+"<email>"+email+"<phone>"+phone;
}
}
Stack trace
java.lang.IllegalArgumentException: No converter found for return value of type:
class com.test.SearchVO
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessage
ConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMeth
odProcessor.java:178) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessage
ConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMeth
odProcessor.java:153) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestResponse
BodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:16
5) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.method.support.HandlerMethodReturnValueHandle
rComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:80) ~
[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocabl
eHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:126) ~[spring-
webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingH
andlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:817) ~[sprin
g-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingH
andlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:731) ~[spring-web
mvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapt
er.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.2.5.RELEASE.ja
r:4.2.5.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(Dispatch
erServlet.java:959) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(Dispatche
rServlet.java:893) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(Frame
workServlet.java:968) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServl
et.java:859) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) ~[tomcat
-embed-core-8.0.32.jar:8.0.32]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkSer
vlet.java:844) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) ~[tomcat
-embed-core-8.0.32.jar:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:292) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52
) ~[tomcat-embed-websocket-8.0.32.jar:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConf
iguration$ApplicationContextHeaderFilter.doFilterInternal(EndpointWebMvcAutoConf
iguration.java:237) ~[spring-boot-actuator-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerR
equestFilter.java:107) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilter
Internal(WebRequestTraceFilter.java:112) ~[spring-boot-actuator-1.3.3.RELEASE.ja
r:1.3.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerR
equestFilter.java:107) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(
RequestContextFilter.java:99) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerR
equestFilter.java:107) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInter
nal(HttpPutFormContentFilter.java:87) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEA
SE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerR
equestFilter.java:107) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
Input Json
{
"empid": "harry",
"nickname": "harry",
"email": "harry#gmail.com",
"phone": "12323232"
}

Please make sure that you have public getter methods for the fields of class SearchVO.

Replace #EnableAutoConfiguration with #SpringBootApplication annotation.
#SpringBootApplication consists of:
#Configuration - informs Spring that this is a Config class.
#EnableAutoConfiguration - Enable AutoConfiguration which triggers Spring Boots autoconfiguration based on clasess in classpath.
#ComponentScan - informs Spring to Scan for #Components ( i.e. #RestController, #Controller, #Repository, #Service)
Here is Small Demo with your Request Mapping.
Consider moving the #RestController in a separate class under abc.xyz.controller package where abc.xyz is the package which contains SpringBootApplication class, this will ensure #ComponentScan to look for all stereotypes.

as #Ribin suggested this kind of errors occurs when your class is missing public getter/setter for its properties.

Related

How to use spring cloud in development environment to create microservices

How to use spring cloud in development environment to create microservices I made a structure that appears the service in the Eureka dashboard but when I run my service in the browser it gives a Not Found error. I'll post my code here to see if anyone can help me.
ApiGatewayApplication.java:
package com.example.apigateway;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
#SpringBootApplication
#EnableEurekaServer
public class ApiGatewayApplication {
public static void main(String[] args) {
SpringApplication.run(ApiGatewayApplication.class, args);
}
}
application.properties:
spring.application.name = eureka-server
server.port = 8761
eureka.client.register-with-eureka = false
eureka.client.fetch-registry = false
eureka.instance.hostname=localhost
#spring.cloud.gateway.discovery.locator.enabled=true
spring.cloud.gateway.enabled=false
spring.cloud.gateway.routes[0].id = user
spring.cloud.gateway.routes[0].uri = lb://USER-SERVICE
spring.cloud.gateway.routes[0].predicates = Path=/user/**
#spring.cloud.gateway.routes[0].filters = RewritePath=/user/(?.*), /$\{path}
UserApplication.java:
package com.example.user;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
#SpringBootApplication
#EnableDiscoveryClient
public class UserApplication {
public static void main(String[] args) {
SpringApplication.run(UserApplication.class, args);
}
}
UserController.java:
package com.example.user;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
//#Controller// This means that this class is a Controller
#RequestMapping(path="/user") // This means URL's start with /demo (after Application path)
#RestController
public class UserController {
#Autowired // This means to get the bean called userRepository
// Which is auto-generated by Spring, we will use it to handle the data
private UserRepository userRepository;
#GetMapping("/")
public String getHelloWorld()
{
return "Hello World";
}
#PostMapping(path="/add") // Map ONLY POST Requests
public #ResponseBody String addNewUser (#RequestParam String name
, #RequestParam String email) {
// #ResponseBody means the returned String is the response, not a view name
// #RequestParam means it is a parameter from the GET or POST request
User n = new User();
n.setNome(name);
n.setEmail(email);
userRepository.save(n);
return "Saved";
}
#GetMapping(path="/all")
public #ResponseBody Iterable<User> getAllUsers() {
// This returns a JSON or XML with the users
return userRepository.findAll();
}
}
application.properties:
spring.jpa.hibernate.ddl-auto=none
spring.datasource.url=jdbc:mysql://${MYSQL_HOST:Mysql}:3306/quitanda_app
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQLDialect
#spring.jpa.show-sql: true
server.port = 8000
spring.application.name = user-service
eureka.client.serviceUrl.defaultZone = http://localhost:8761/eureka
eureka.instance.hostname=localhost
When I run http://localhost:8761/ it returns me:
When I call my controller http://localhost:8761/user/all
it return to me:
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Mon Sep 26 20:16:15 BRT 2022
There was an unexpected error (type=Not Found, status=404).
Does anyone know how to help me?

Resolved:
folder api-gateway : EurekaServer:
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
#SpringBootApplication
#EnableEurekaServer
public class ApiGatewayApplication {
public static void main(String[] args) {
SpringApplication.run(ApiGatewayApplication.class, args);
}
}
api-gateway: application.properties
spring.application.name = api-gateway
server.port = 8761
eureka.client.register-with-eureka = false
eureka.client.fetch-registry = false
eureka.instance.hostname=localhost
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/
api-gateway: pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.4</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>api-gateway</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>api-gateway</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
<version>3.1.4</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
folder routing: routing our services:
package com.example.routing;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
#SpringBootApplication
#EnableDiscoveryClient
public class RoutingApplication {
public static void main(String[] args) {
SpringApplication.run(RoutingApplication.class, args);
}
}
routing: application.properties:
server.port=8080
spring.application.name=routing
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/
eureka.instance.hostname=localhost
spring.cloud.gateway.discovery.locator.enabled=true
#spring.main.web-application-type=reactive
spring.cloud.gateway.enabled=true
spring.cloud.gateway.routes[0].id=user
spring.cloud.gateway.routes[0].uri=lb://USER
spring.cloud.gateway.routes[0].predicates=Path=/user/**
spring.cloud.gateway.routes[1].id=testes
spring.cloud.gateway.routes[1].uri=lb://TESTES
spring.cloud.gateway.routes[1].predicates=Path=/testes/**
routing: pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.4</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>routing</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>routing</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
<spring-cloud.version>2021.0.4</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
<version>3.1.4</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
<version>3.1.4</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
folder testes: Class Application:
package com.example.testes;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
#SpringBootApplication
#EnableDiscoveryClient
public class TestesApplication {
public static void main(String[] args) {
SpringApplication.run(TestesApplication.class, args);
}
}
testes: Controller:
package com.example.testes.controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
//import com.example.user.communication.PaymentCartCommunication;
//#Controller// This means that this class is a Controller
#RequestMapping("/testes")// This means URL's start with /demo (after Application path)
#RestController
public class TestesController {
#GetMapping("/message")
public String getHelloWorld()
{
return "Hello World testes";
}
}
testes: application.properties:
server.port = 8762
spring.application.name = testes
eureka.client.serviceUrl.defaultZone = http://localhost:8761/eureka
eureka.instance.hostname=localhost
testes: pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.4</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>testes</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>testes</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
<version>3.1.4</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
folder user: Class application:
package com.example.user;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
#SpringBootApplication
#EnableDiscoveryClient
public class UserApplication {
public static void main(String[] args) {
SpringApplication.run(UserApplication.class, args);
}
}
user: Controller:
package com.example.user.controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
//#Controller// This means that this class is a Controller
#RequestMapping("/user")// This means URL's start with /demo (after Application path)
#RestController
public class UserController {
#GetMapping("/message")
public String getHelloWorld()
{
return "Hello World";
}
}
user: application.properties:
server.port = 8000
spring.application.name = user
eureka.client.serviceUrl.defaultZone = http://localhost:8761/eureka
eureka.instance.hostname=localhost
user: pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.4</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>user</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>user</name>
<description>User microservice</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
<version>3.1.4</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Run each project in a terminal and access the services : http://localhost:8080/testes/message http://localhost:8080/user/message
Repository

Resilience4j never call fallback method

I am new to Resilience4j and circuit breaker pattern.
I write a sample for resilience4j. Details is as below:
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>ir.co.isc</groupId>
<artifactId>circuit-breaker</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>circuit-breaker</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
<spring-cloud.version>Hoxton.SR6</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- resilience4j dependency-->
<dependency>
<groupId>io.github.resilience4j</groupId>
<artifactId>resilience4j-spring-boot2</artifactId>
<version>1.5.0</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
<version>2.3.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
<version>2.3.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
application.yml:
resilience4j:
circuitbreaker:
configs:
default:
registerHealthIndicator: true
slidingWindowSize: 10
minimumNumberOfCalls: 5
permittedNumberOfCallsInHalfOpenState: 3
automaticTransitionFromOpenToHalfOpenEnabled: true
waitDurationInOpenState: 5s
failureRateThreshold: 20
eventConsumerBufferSize: 10
instances:
mainService:
baseConfig: default
Controller class:
package ir.co.isc.circuitbreaker;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;
#RestController
public class MainServiceController {
#Autowired
private MainService mainService;
#GetMapping("/getSleuthTest")
#ResponseStatus(HttpStatus.OK)
public ResponseEntity<String> getSleuthTest(){
String response = mainService.getResponse();
return new ResponseEntity<>(response, HttpStatus.OK);
}
}
Service class:
package ir.co.isc.circuitbreaker;
import io.github.resilience4j.circuitbreaker.annotation.CircuitBreaker;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;
#Service
public class MainService {
private static final String MAIN_SERVICE = "mainService";
#Autowired
private RestTemplate restTemplate;
#Bean
public RestTemplate getRestTemplate() {
return new RestTemplate();
}
#CircuitBreaker(name = MAIN_SERVICE, fallbackMethod="testFallBack")
public String getResponse(){
return restTemplate.getForObject("http://localhost:8081/serviceOne", String.class);
}
private ResponseEntity<String> testFallBack(Exception e){
return new ResponseEntity<>("In fallback method", HttpStatus.INTERNAL_SERVER_ERROR);
}
}
SpringBootApplication class:
package ir.co.isc.circuitbreaker;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class CircuitBreakerApplication {
public static void main(String[] args) {
SpringApplication.run(CircuitBreakerApplication.class, args);
}
}
I use postman runner to call my API. I set runner iterations to 200.
after 10 successful API call I stop third-party in this url :
http://localhost:8081/serviceOne
As I understood, after stopping third party API and record minimum number of successful call, resilience4j start to calculate fault rate and when fault rate is more than failureRateThreshold, fallback method (here testFallBack in service class) called, circuit status change from close to open mode and return my desire answer which describe in testFallBack() method.
But this is never happen (testFallBack() method never called). What is wrong with my application?

Overall after so much Google, i have feeling that fallBack can only be called from Controller. I have tried multiple times, but from Service it didn't work.
Since you are also calling it from Service, that's why you are facing this issue, instead if you call it from controller it should work for you.

Spring Boot + Thymeleaf = "Whitelabel Error Page" when trying to render index.html

I am trying to do simple Spring MVC LibraryDo You have any idea why I have problem with View, when i use homepage method in my controller it should show me index.html but i only get Whitelabel Error Page all the time, and i dont know why:/
My structure:
[https://i.imgur.com/5TrGGrB.png]
My controller:
package controller;
import model.Book;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import service.BookService;
import javax.servlet.http.HttpServletRequest;
import java.util.List;
#Controller
public class LiberianController{
#Autowired
private BookService bookService;
#RequestMapping(value = "/")
public String homepage() {
return "index";
}
#GetMapping(value = "/allBooks")
public ModelAndView allBooks(ModelAndView modelAndView) {
List<Book> books = bookService.getAllBooks();
modelAndView.addObject("listBooks", books);
modelAndView.setViewName("allBooks");
return modelAndView;
}
#GetMapping(value = "/addBook")
public ModelAndView newBook(ModelAndView modelAndView) {
Book book = new Book();
modelAndView.addObject("book", book);
modelAndView.setViewName("addBook");
return modelAndView;
}
#GetMapping(value = "updateBook")
public ModelAndView updateBook(HttpServletRequest httpServletRequest) {
long id = Long.parseLong(httpServletRequest.getParameter("id"));
Book book = bookService.getBook(id);
ModelAndView modelAndView = new ModelAndView("addBook");
modelAndView.addObject("book", book);
return modelAndView;
}
#RequestMapping(value = "/saveBook",method = RequestMethod.POST)
public ModelAndView saveBook(#ModelAttribute Book book) {
if (book.getId() == 0) {
bookService.addBook(book);
} else {
bookService.updateBook(book.getId(), book);
}
return new ModelAndView("redirect:/allBooks");
}
#GetMapping(value = "/deleteBook")
public ModelAndView deleteBook(HttpServletRequest httpServletRequest) {
long id = Long.parseLong(httpServletRequest.getParameter("id"));
bookService.deleteBook(id);
return new ModelAndView("redirect:/allBooks");
}
}
My POM:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>MyLibrary</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.12.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.thymeleaf/thymeleaf -->
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf</artifactId>
<version>3.0.9.RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Something</title>
</head>
<body>
<h1>Hello</h1>
</body>
</html>
aplication.properties
spring.jpa.hibernate.ddl-auto=update
spring.datasource.url=jdbc:mysql://localhost:3306/book?useSSL=false
spring.datasource.username=root
spring.datasource.password=root
spring.mvc.view.prefix=/WEB-INF/
spring.mvc.view.suffix=.jsp
spring.thymeleaf.mode=LEGACYHTML5

There are a few things wrong with your demo project.
1. Incorrect package structure
You put your Runner class to a default package. It not a good idea, because in this case Spring Boot is not able to set a default package for component scanning. When you run your application you should see something like:
** WARNING ** : Your ApplicationContext is unlikely to start due to a #ComponentScan of the default package.
Solution: move all your classes to common package.
2. spring-boot-starter-thymeleaf is missing
In your pom.xml file add following dependency to make Thymeleaf templates working:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
Then remove following dependency that is present in your pom.xml:
<!-- https://mvnrepository.com/artifact/org.thymeleaf/thymeleaf -->
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf</artifactId>
<version>3.0.9.RELEASE</version>
</dependency>
3. spring.thymeleaf.mode=LEGACYHTML5 requires additional dependency
When you run your app and you open http://localhost:8080 you will see following exception:
org.thymeleaf.exceptions.ConfigurationException: Cannot perform conversion to XML from legacy HTML: The nekoHTML library is not in classpath. nekoHTML 1.9.15 or newer is required for processing templates in "LEGACYHTML5" mode [http://nekohtml.sourceforge.net]. Maven spec: "net.sourceforge.nekohtml::nekohtml::1.9.15". IMPORTANT: DO NOT use versions of nekoHTML older than 1.9.15.
at org.thymeleaf.templateparser.html.AbstractHtmlTemplateParser.parseTemplate(AbstractHtmlTemplateParser.java:90) ~[thymeleaf-2.1.6.RELEASE.jar:2.1.6.RELEASE]
at org.thymeleaf.TemplateRepository.getTemplate(TemplateRepository.java:278) ~[thymeleaf-2.1.6.RELEASE.jar:2.1.6.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1104) ~[thymeleaf-2.1.6.RELEASE.jar:2.1.6.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1060) ~[thymeleaf-2.1.6.RELEASE.jar:2.1.6.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1011) ~[thymeleaf-2.1.6.RELEASE.jar:2.1.6.RELEASE]
This is because you have specified:
spring.thymeleaf.mode=LEGACYHTML5
and you haven't add nekoHTML library to the classpath.
Solution: add following dependency to your pom.xml:
<dependency>
<groupId>net.sourceforge.nekohtml</groupId>
<artifactId>nekohtml</artifactId>
<version>1.9.22</version>
</dependency>
After applying all these steps you will see "Hello" on your app's home page. Hope it helps.

Unable to Autowire an interface which extends CRUD repository

I am new to spring boot and trying to build a demo app. I would like to connect to a mysql DB using hibernate and fetch contents from a table. This is what my project structure looks like:
The class DemoApplication.java looks like this:
package com.example;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
The HibernateTestController.java looks like this:
package com.example.controllers;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.example.repositories.PatchRepository;
#Controller
public class HibernateTestController {
#Autowired
PatchRepository patchRepository;
#RequestMapping(value={"/hibernateTest"})
public ModelAndView home() {
//List<Patch> patches = patchRepository.findAll();
return new ModelAndView("hibernateTest");
}
}
The PatchRepository.java looks like this:
package com.example.repositories;
import java.util.List;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import com.example.models.Patch;
#Repository
public interface PatchRepository extends CrudRepository<Patch, Long> {
List<Patch> findAll();
}
Now, whenever I start the application, I get an error saying:
*************************** APPLICATION FAILED TO START
Description:
Field patchRepository in
com.example.controllers.HibernateTestController required a bean of
type 'com.example.repositories.PatchRepository' that could not be
found.
Action:
Consider defining a bean of type
'com.example.repositories.PatchRepository' in your configuration.
I am not able to figure out why the Autowire for PatchRepository is not working. I think my project structure is right and that PatchRepository should automatically be detected by spring as a bean.
This is what the POM.xml looks like:
<?xml version="1.0" encoding="UTF-8"?>
http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.2.RELEASE</version>
<relativePath />
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-cache</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jersey</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-web</artifactId>
</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.webjars</groupId>
<artifactId>jquery</artifactId>
<version>3.1.1-1</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>3.3.7</version>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>1.0.0.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-commons-core</artifactId>
<version>1.4.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>1.10.6.RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

try using the repository scan in your DemoApplication class
#SpringBootApplication
#EnableJpaRepositories("com.example.repositories")
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}

lets try to add "#ComponentScan"
#SpringBootApplication
#ComponentScan("com.example")
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}

Be sure that you have
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
and
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
into your pom.xml
Proper configs
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
And your Patch class is annotated with #Entity and have an Id Attribute annotated with #Id.
Everything should work.

I refactored my code as follows and things worked:
package com.example.repositories;
import java.util.List;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import com.example.models.Patch;
public interface PatchRepository extends CrudRepository<Patch, Long> {
List<Patch> findAll();
}
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.3.RELEASE</version>
<relativePath />
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>jquery</artifactId>
<version>3.1.1-1</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>3.3.7</version>
</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-jpa</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-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
spring.thymeleaf.cache: false
##DB connections##
spring.datasource.url=jdbc:mysql://localhost/testdb
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
# Keep the connection alive if idle for a long time (needed in production)
spring.datasource.testWhileIdle = true
spring.datasource.validationQuery = SELECT 1
# Hibernate Configuration
spring.jpa.hibernate.ddl-auto=update
packagesToScan=com.example
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
hibernate.show_sql=false
hibernate.format_sql=true
# Naming strategy
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
entitymanager.packagesToScan=com.example
# Use spring.jpa.properties.* for Hibernate native properties (the prefix is
# stripped before adding them to the entity manager)
#logging.level.org.springframework.web=DEBUG
#logging.level.org.hibernate=DEBUG
package com.example.controllers;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.example.models.Patch;
import com.example.repositories.PatchRepository;
#Controller
public class HibernateTestController {
#Autowired
PatchRepository patchRepository;
#RequestMapping(value={"/hibernateTest"})
public ModelAndView home() {
List<Patch> patches = patchRepository.findAll();
return new ModelAndView("hibernateTest");
}
}
Application.properties looks like this:
spring.thymeleaf.cache: false
##DB connections## spring.datasource.url=jdbc:mysql://localhost/testdb spring.datasource.username=root spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
# Keep the connection alive if idle for a long time (needed in production) spring.datasource.testWhileIdle = true
spring.datasource.validationQuery = SELECT 1
# Hibernate Configuration spring.jpa.hibernate.ddl-auto=update packagesToScan=com.example
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
hibernate.show_sql=false hibernate.format_sql=true
# Naming strategy spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
entitymanager.packagesToScan=com.example
# Use spring.jpa.properties.* for Hibernate native properties (the prefix is
# stripped before adding them to the entity manager)
#logging.level.org.springframework.web=DEBUG
#logging.level.org.hibernate=DEBUG

Spring boot #Configurable

I'm trying to configure Autowired in non-spring managed class under spring boot application.
I run successfully this under web application deployed under tomcat server.
But when i want run this under spring boot nothing works.
I made very simple app to check this functionality:
Console result from web app int tomcat:
...:::TEST CONTROLLER
...:::TEST autowired in cotrnoller: com.mycompany.test_aop.Test#30ea7445
...:::NEW
...:::Check: com.mycompany.test_aop.Test#30ea7445
Console result from spring boot app:
...:::TEST CONTROLLER
...:::TEST autowired in cotrnoller: com.mycompany.test_aop.Test#627ae77d
...:::NEW
...:::Check: null
I read a lot of topics hot to configure spring boot app but nothing works.
I trying set param -javaagent to spring-instrument.jar but no effect.
I struggle with this for three days but no effect
App:
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>pl.com.eurohost</groupId>
<artifactId>aop_test</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<repositories>
<repository>
<id>unknown-jars-temp-repo</id>
<name>A temporary repository created by NetBeans for libraries and jars it could not identify. Please replace the dependencies in this repository with correct ones and delete this repository.</name>
<url>file:${project.basedir}/lib</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>1.3.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>1.3.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<version>1.3.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
<version>1.3.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
<version>1.3.3.RELEASE</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-json</artifactId>
<version>1.19</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-servlet</artifactId>
<version>1.19</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>1.3.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>4.2.5.RELEASE</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.6</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-instrument</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.3.RELEASE</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-agent</artifactId>
<version>2.5.6.SEC03</version>
</dependency>
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>1.3.3.RELEASE</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Main.class:
package com.mycompany.test_aop;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.context.annotation.EnableLoadTimeWeaving;
import org.springframework.context.annotation.aspectj.EnableSpringConfigured;
import org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver;
#SpringBootApplication
#EnableSpringConfigured
#EnableAspectJAutoProxy
#EnableLoadTimeWeaving
#ComponentScan(value = "com.mycompany.test_aop")
public class Main {
public static void main(String args[]) {
SpringApplication.run(Main.class, args);
}
#Bean
public InstrumentationLoadTimeWeaver loadTimeWeaver() throws Throwable {
InstrumentationLoadTimeWeaver loadTimeWeaver = new InstrumentationLoadTimeWeaver();
return loadTimeWeaver;
}
}
Web.java:
package com.mycompany.test_aop;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
#Controller
public class web {
#Autowired
Test t;
#RequestMapping(value = "/")
public #ResponseBody String root(){
System.out.println("...:::TEST CONTROLLER");
System.out.println("...:::TEST autowired in cotrnoller: "+t);
Test2 a = new Test2();
a.check();
return "HI!";
}
}
Test.java:
package com.mycompany.test_aop;
import org.springframework.stereotype.Service;
#Service
public class Test {
public void display() {
System.out.println("...:::TEST CLASS CALL DISPLAY");
}
}
Test2.java
package com.mycompany.test_aop;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Configurable;
#Configurable
public class Test2 {
#Autowired
private Test t;
public Test2() {
System.out.println("...:::NEW");
}
public void check() {
System.out.println("...:::Check: "+t);
}
}
Webapp has different pom, addittional file app-servlet.xml and no main method:
Main.java
package com.mycompany.test_aop;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableLoadTimeWeaving;
import org.springframework.context.annotation.aspectj.EnableSpringConfigured;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
#EnableSpringConfigured
#EnableLoadTimeWeaving
#ComponentScan(value = "com.mycompany.test_aop")
#Configuration
#EnableWebMvc
public class Main extends WebMvcConfigurerAdapter {
}
app-servlet.xml:
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<mvc:default-servlet-handler/>
<context:annotation-config/>
<bean class="com.mycompany.test_aop.Main"/>
<mvc:annotation-driven>
</mvc:annotation-driven>
</beans>

By using Autowire Annotations.
#Autowired
Test2 a;
#RequestMapping(value = "/")
public #ResponseBody String root(){
System.out.println("...:::TEST CONTROLLER");
System.out.println("...:::TEST autowired in cotrnoller: "+t);
Test2 a = new Test2();//instead of this use autowired of test2
a.check();
return "HI!";
If you give thisTest2 a=new Test2();It will initiate with new Object then it will show only NULL

Develop Reference

ruby bash windows laravel spring algorithm oracle macos go visual-studio

(type=Internal Server Error, status=500). No converter found for return value of type: class com.test.SearchVO - spring

Please make sure that you have public getter methods for the fields of class SearchVO.

as #Ribin suggested this kind of errors occurs when your class is missing public getter/setter for its properties.

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