I have a simple Spring application:
Main class:
#SpringBootApplication
#EnableScheduling
public class SchedulerApplication {
public static void main(String[] args) {
SpringApplication.run(SchedulerApplication.class, args);
}
}
And class for scheduled job
#Component
public class Executor {
private static final Logger log = LoggerFactory.getLogger(Executor.class);
private Integer jobCounter = 1;
#Scheduled(fixedDelay = 1000)
public void run() {
log.info("Start task (" + jobCounter + ")");
log.info("Stop task");
jobCounter ++;
}
}
This is 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>ru.alexeyzhulin</groupId>
<artifactId>scheduler</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>scheduler</name>
<description>Task scheduler</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.4.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</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
That is my project structure
It works fine under the IDE (IntelliJ IDEA), but when I compiled this code to jar file and run:
java -jar scheduler.jar
I got a long stack of errors like this
org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class [ru.alexeyzhulin.SchedulerApplication]; nested exception is java.lang.IllegalArgumentException: No auto configuration classes found in META-INF/spring.f actories. If you are using a custom packaging, make sure that file is correct.
What have I missed?
Add the following element under your sprig boot maven plugin in pom.
<configuration>
<fork>true</fork>
<mainClass>Your-main-config-class</mainClass>
</configuration>
It seems that your SpringBootApplication class located in a wrong place.
It should be properly located. Usually it is in a root of your artifact package.
For example:
ru.alexeyzhulin.scheduler
ru.alexeyzhulin.scheduler.SchedulerApplication
ru.alexeyzhulin.scheduler.Executor
or
ru.alexeyzhulin.scheduler
ru.alexeyzhulin.scheduler.SchedulerApplication
ru.alexeyzhulin.scheduler.components
ru.alexeyzhulin.scheduler.components.Executor
And look at it:
Failed to process import candidates for configuration class
Related
I am just trying to implement a sample rest controller on spring boot for learning. When i am sending the request through web browser i am getting a white label error.
My applications context path is set to /learn. Below are my source files, project structure and pom.xml.
TestController.java
package com.practice.learn.controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
#RestController
#RequestMapping("/learn")
public class TestController {
TestController(){
System.out.println("TestController initialized");
}
#GetMapping("/test")
public String testMethod() {
System.out.println("Inside test method");
return "This is sample text";
}
}
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>2.7.8</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.practice</groupId>
<artifactId>learn</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>learn</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</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-starter-web</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
LearnApplication.java
package com.practice.learn;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class LearnApplication {
public static void main(String[] args) {
SpringApplication.run(LearnApplication.class, args);
}
}
application.properties
server.port=8081
server.servlet.context-path=/learn
since you already set the servlet context path as '/learn' in your configuration file, you do not need to add '/learn' again in the RequestMapping in your controller. just remove it and let us know.
Trying to write a custom task in Spring Cloud Dataflow which will create a Spring Batch application that implements the Task interface provided by the Spring Cloud Task.
I have try all posible way to impliment this but i am getting this error The import org.springframework.cloud.task.Task cannot be resolved
I have addedd following dependecny iin my project.
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>spring-cloud-task-example</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring-cloud-task-example</name>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.1</version>
<relativePath />
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-task-core</artifactId>
<version>2.4.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>```
And java Code
package com.example.Test;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.task.Task;
import org.springframework.cloud.task.configuration.EnableTask;
#EnableTask
#SpringBootApplication
public class SpringCloudTaskExample implements Task {
public static void main(String[] args) {
SpringApplication.run(SpringCloudTaskExample.class, args);
}
#Override
public void run(String... args) throws Exception {
System.out.println("Running Spring Cloud Task Example!");
}
}
The reason it is not working is that org.springframework.cloud.task.Task does not exist.
Maybe you were trying to implement org.springframework.cloud.task.configuration.TaskConfigurer ?
Please update your Spring Boot Version to 2.7.8
Please replace the following in your pom.xml
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-task-core</artifactId>
<version>2.4.1</version>
</dependency>
with
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-task</artifactId>
</dependency>
I have downloaded spring boot example from https://start.spring.io/.
I tried many times but i get same error again and again:
Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/boot/SpringApplication
at com.example.demo.Application.main(Application.java:10)
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.SpringApplication
Here is my 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>2.2.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>SpringBoot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>SpringBoot</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</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>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
and SpringBootClass
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
also my ControllerClass
package com.example.demo.controller;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
#RestController
#EnableAutoConfiguration
public class HelloWorldController {
#RequestMapping("/hello")
#ResponseBody
public String sayHello() {
return "Hello World Developer!!!";
}
}
I am struggling from past three days and not getting any help from anywhere.
I am using Spring Tool Suite
I am new to Spring Boot and need help here
Set Maven to you path and try from command prompt/ terminal with command:
mvn clean install
this will create jar file in target folder.
go to target folder and run java -jar jarName.jar.
OR
Try cleaning the project from project tab,
Add all the maven dependencies to eclipse build path.
Then try running it as java application.
It is caused by a corrupt Maven repository.
Delete everything under C:\Users\<me>\.m2\repository.
Then do Eclipse Maven Update, and it will work.
it is like spring-boot.jar got corrupted.
I have looked on Stack Overflow a few days ago. My problem seems to be very common, but I cannot manage to fix it.
I've tried these ways 1 and 2.
This is my application.propreties :
spring.datasource.driver-class-name= org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://localhost:5433/mydatabase
spring.datasource.username=username
spring.datasource.password=password
spring.jpa.hibernate.ddl-auto=create
spring.main.web-application-type=none
When I tried to run it, it is giving me following errors :
org.springframework.context.ApplicationContextException: Unable to start web server;
nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean
These is my main class:
#SpringBootApplication
public class StartApplication {
#Autowired
BookRepository repository;
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
and this is my 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>toto</groupId>
<artifactId>toto</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.2.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
<downloadSources>true</downloadSources>
<downloadJavadocs>true</downloadJavadocs>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>2.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.0</version>
</plugin>
</plugins>
</build>
</project>
Thanks in advance for your help.
You should remove the following property from your application.properties file
spring.main.web-application-type=none
it means that you don't need a web server in your application.
I'm not a pro programmer, but what I would do if I were you :
Make sure you have a proper project structer
Check the basic configuration guides fromSpring.io!
I have my personal project where I training with Spring Framework usage, maybe you will get something usefull from it,project link!
Good luck and have fun :)
Your main class should be like:
#SpringBootApplication
public class StartApplication {
#Autowired
BookRepository repository;
public static void main(String[] args) {
SpringApplication.run(StartApplication.class, args);
}
}
I generated a project on start.spring.io with the following project dependencies:
Jersey (JAX-RS)
JPA
PostgreSQL
Web
When I try to access localhost:8080/homeroom/webapi/test I get a page with the following error:
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
I get this error no matter what url I try to access.
In my console info I can see it print Mapping servlet: 'jerseyServlet' to [/webapi/*] so I know my config class is being registered. When I change #ApplicationPath("/webapi") to #ApplicationPath("/"), a GET on localhost:8080/homeroom/test or localhost:8080/homeroom/ returns a blank page instead, with no text or error.
Why can't I access my resource?
This is my 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>com.homeroomed</groupId>
<artifactId>homeroom</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>HomeRoom</name>
<description>HomeRoom REST API</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.2.5.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-jersey</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.4-1201-jdbc41</version>
<scope>runtime</scope>
</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>
I'm trying to do a descriptor-less deploy so I have:
#Component
#ApplicationPath("/webapi")
public class MyJerseyConfig extends ResourceConfig{
public MyJerseyConfig() {
// String packageName =TestJerseyResource.class.getPackage().getName();
// this.packages(packageName);
this.register(TestJerseyResource.class);
// System.out.println("The package is:"+packageName);
}
}
And I have the following resource:
#Component
#Path("/test")
public class TestJerseyResource {
#GET
#Produces(MediaType.APPLICATION_JSON)
public String getTest()
{
return "Hi!";
}
}
I'm running the project from:
#SpringBootApplication
public class HomeRoomApplication {
public static void main(String[] args) {
SpringApplication.run(HomeRoomApplication.class, args);
}
}
UPDATE:
So 2 things:
I had to use spring annotations #Controller and #RequestMapping instead of Jersey's #PATH and #GET, and had to GET /webapi/test instead of /homeroom/webapi/test
The reason you can't access your resource from looking at the information you provided is you there is no /homeroom anywhere I saw in your code.
This is a valid URL for your project:
http://localhost:8080/webapi/test
If you wanted homeroom to be in the URL you could change the application path value to homeroom instead of webapi.
Well, quoting from #ApplicationPath JavaDoc:
May only be applied to a subclass of Application.
https://docs.oracle.com/javaee/6/api/javax/ws/rs/ApplicationPath.html
That might be part of the problem...