I am trying to define an immutable configuration using an interface annotated with @ConfigurationProperties. But when I try to ran the applicaiton, I am getting below error.
Exception in thread "main" io.micronaut.context.exceptions.NoSuchBeanException: No bean of type [com.sample.app.configuration.AppConfig] exists. Make sure the bean is not disabled by bean requirements (enable trace logging for 'io.micronaut.context.condition' to check) and if the bean is enabled then ensure the class is declared a bean and annotation processing is enabled (for Java and Kotlin the 'micronaut-inject-java' dependency should be configured as an annotation processor).
at io.micronaut.context.DefaultBeanContext.resolveBeanRegistration(DefaultBeanContext.java:2805)
at io.micronaut.context.DefaultBeanContext.getBean(DefaultBeanContext.java:1617)
at io.micronaut.context.DefaultBeanContext.getBean(DefaultBeanContext.java:867)
at io.micronaut.context.DefaultBeanContext.getBean(DefaultBeanContext.java:859)
at com.sample.app.App.main(App.java:13)
application.yml
my:
app:
name: chat server
version: 1.23.45
AppConfig class
import io.micronaut.context.annotation.ConfigurationProperties;
import io.micronaut.core.bind.annotation.Bindable;
import jakarta.annotation.Nonnull;
@ConfigurationProperties("my.app")
public interface AppConfig {
@Bindable(defaultValue = "my chat server")
@Nonnull
String getName();
@Bindable(defaultValue = "1.0.0")
String getVersion();
@Bindable(defaultValue = "chat server send and receive messages")
String getDescription();
}
pom.xml
<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>
<groupId>com.sample.app</groupId>
<artifactId>micronaut-app</artifactId>
<version>1</version>
<parent>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-parent</artifactId>
<version>3.7.3</version>
</parent>
<properties>
<maven.compiler.target>15</maven.compiler.target>
<maven.compiler.source>15</maven.compiler.source>
</properties>
<dependencies>
<dependency>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-inject-java</artifactId>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<annotationProcessorPaths>
<path>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-inject-java</artifactId>
</path>
</annotationProcessorPaths>
</configuration>
</plugin>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>com.sample.app.App</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
References
https://docs.micronaut.io/latest/guide/#immutableConfig