I have some project trying to build a microservices architecture. Some of the projects are used producing jar files (I refer these projects as "library projects".) for the callable microservices. One of these microservices are responsible for user/customer registration and lookup. All the data is persisted in a Cassandra cluster. One of the library projects are responsible for providing various Cassandra based services/value objects, etc...
In the microservice pom file, I include the jar produced by the library project. It compiles, but when I start the customer service the classes from that jar are not found.
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APPLICATION FAILED TO START
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Description:
Field repository in com.besztercekk.tao.customer.handler.PostUserHandler required a bean of type 'com.besztercekk.tao.cassandra.repository.ReactiveUserRepository' that could not be found.
The injection point has the following annotations:
- @org.springframework.beans.factory.annotation.Autowired(required=true)
Action:
Consider defining a bean of type 'com.besztercekk.tao.cassandra.repository.ReactiveUserRepository' in your configuration.
Here are some code snippets, but I can attach anything else you need.
This is the pom file for the microservice. The class what is not found is in this dependency: tao-elszamolas-cassandra.
<?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>
<artifactId>tao-elszamolas-customer-service</artifactId>
<packaging>jar</packaging>
<name>tao-elszamolas-customer-service</name>
<description>TAO elszamolas customer backend service</description>
<parent>
<groupId>com.besztercekk.tao</groupId>
<artifactId>tao-elszamolas-spring</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>
<dependencies>
<!-- Spring Cloud Eureka client -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<!-- Spring Cloud config client -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-client</artifactId>
</dependency>
<!-- Webflux -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- Reactive cassandra -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-cassandra-reactive</artifactId>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>27.1-jre</version>
</dependency>
<!-- TAO elszamolas dependencies -->
<dependency>
<groupId>com.besztercekk.tao</groupId>
<artifactId>tao-elszamolas-cassandra</artifactId>
</dependency>
<dependency>
<groupId>com.besztercekk.tao</groupId>
<artifactId>tao-elszamolas-jwt</artifactId>
</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.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<release>11</release>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
This is the pom file for the project what contains the missing class:
<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>
<artifactId>tao-elszamolas-cassandra</artifactId>
<packaging>jar</packaging>
<name>tao-elszamolas-cassandra</name>
<description>TAO elszámolás Spring alapú több projektben használt komponensek gyűjtő projektje</description>
<parent>
<groupId>com.besztercekk.tao</groupId>
<artifactId>tao-elszamolas-spring</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<dependencies>
<!-- Reactive cassandra -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-cassandra-reactive</artifactId>
</dependency>
</dependencies>
</project>
Here the class where the error is coming from:
@Component
@Validator(UserDataValidator.class)
public class PostUserHandler extends AbstractValidationHandler<User, ChainableValidator> {
@Autowired
private ReactiveUserRepository repository;
@Autowired
private PasswordEncoder passwordEncoder;
public PostUserHandler() {
super(User.class);
}
@Override
protected Mono<ServerResponse> processRequest(User body, ServerRequest request) {
return repository.save(enrichUser(body, UUIDs.random().toString()))
.flatMap(updatedUser -> {
sendRegistrationCode();
return ok(updatedUser);
})
.onErrorResume(IllegalArgumentException.class, e -> ServerResponse.badRequest().build())
.switchIfEmpty(ServerResponse.status(HttpStatus.INTERNAL_SERVER_ERROR).build());
}
@Override
protected Mono<User> extractContent(ServerRequest request) {
return request.bodyToMono(User.class);
}
private void sendRegistrationCode() {
//TODO: Send Kafka message to email component
}
private Mono<ServerResponse> ok(User c) {
return ServerResponse.ok().contentType(MediaType.APPLICATION_JSON)
.body(BodyInserters.fromPublisher(Mono.just(c), User.class));
}
private User enrichUser(User user, String activationCode) {
return User.builder()
.authorities(user.getAuthorities())
.email(user.getEmail())
.enabled(user.isEnabled())
.firstName(user.getFirstName())
.id(UUIDs.timeBased())
.lastName(user.getLastName())
.middleName(user.getMiddleName())
.password(passwordEncoder.encode(user.getPassword()))
.registrationTime(LocalDateTime.now())
.passwordExpiryTime(LocalDateTime.now())
.roles(user.getRoles())
.username(user.getUsername())
.accountExpired(false)
.accountLocked(false)
.activationCode(activationCode)
.build();
}
}
Any help would be appreciated!
UPDATE (SOME EXTRA INFO ADDED):
Here is the main class containing the component scan.
@SpringBootApplication
@EnableEurekaClient
@ComponentScan(basePackages = {"com.besztercekk.tao.customer", "com.besztercekk.tao.cassandra"})
public class CustomerBackendApplication {
public static void main(String[] args) {
SpringApplication.run(CustomerBackendApplication.class, args);
}
}
Here is the repository class:
package com.besztercekk.tao.cassandra.repository;
import java.util.UUID;
import org.springframework.data.cassandra.repository.ReactiveCassandraRepository;
import org.springframework.stereotype.Component;
import com.besztercekk.tao.cassandra.model.User;
import reactor.core.publisher.Mono;
/**
* This interface provides reactive {@link User} services.
*/
public interface ReactiveUserRepository extends ReactiveCassandraRepository<User, UUID> {
Mono<User> findByUsername(String username);
Mono<User> findByEmail(String email);
}
Also tried to add @Component and @Repository annotations to this interface, just to see its effect. :-)
My other idea was add the bean programatically to the context after restart. But this is just an interface, so not sure if it works out at all.
The third idea was wrap this interface into a service class and that is easy to add programatically.
But I really want it to be added automatically, without writing code.
