karaf-spring-boot-starter

Spring Boot Starter for karaf

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Positioning · Capabilities · Dependency · Quick Start · Configuration · Versions · Build · License

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Current Version：1.0.0-SNAPSHOT
JDK Baseline：17
Group ID：io.github.easy4j
Artifact ID：karaf-spring-boot-starter
License：Apache License 2.0

1. Positioning

karaf-spring-boot-starter is a Spring Boot starter that integrates karaf for applications using karaf. It provides auto-configuration, property binding, and ready-to-use beans so that applications can consume karaf capabilities with minimal setup.

Dimension	Description
Type	Spring Boot Starter
Consumers	Spring Boot applications using karaf
Core Capabilities	auto-configuration, property binding, ready-to-use beans for karaf
JDK	17
Coordinates	io.github.easy4j:karaf-spring-boot-starter:1.0.0-SNAPSHOT
Config Prefix	karaf

2. Core Capabilities

Capability	Status	Description
Auto-configuration	✅ Stable	Registers karaf beans automatically
Property Binding	✅ Stable	Binds karaf.* to KarafClientProperties
Ready-to-use beans	✅ Stable	Auto-registered via auto-configuration

3. Requirements and Compatibility

Dependency	Minimum	Evidence
JDK	17	pom.xml
Spring Boot	2.3.0.RELEASE	pom.xml parent
Maven	3.6+	Maven Enforcer

4. Auto-configuration

The starter auto-configures the following beans:

Bean	Condition	Missing Behavior
Object	classpath + property	not created

Auto-configuration registration:

• META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports (Spring Boot 2.7+ / 3.x / 4.x)
• META-INF/spring.factories (Spring Boot 2.x legacy)

5. Dependency

<dependency>
    <groupId>io.github.easy4j</groupId>
    <artifactId>karaf-spring-boot-starter</artifactId>
    <version>1.0.0-SNAPSHOT</version>
</dependency>

No additional easy4j component dependencies.

6. Quick Start

6.1 Add dependency

Add the dependency above to your pom.xml.

6.2 Configure

karaf:
  enabled: true

6.3 Use the bean

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

Then inject the auto-configured bean in your code:

@Autowired
private Object bean;

7. Configuration Reference

7.1 Config Prefix

karaf

7.2 Configuration Items

Property	Type	Default	Required	Description	Sensitive
karaf.enabled	boolean	true	No	Enable the starter	No

8. Version Lines and Compatibility

Branch	JDK	Spring Boot	Component Version	Status
2.3.x / 2.7.x	8+	2.3.x / 2.7.x	1.0.x	Maintenance
3.0.x ~ 3.5.x	17	3.x	2.0.x	Maintenance
4.0.x / 4.1.x	17+	4.x	3.0.x	Active

9. Build and Test

mvn clean verify
mvn -pl karaf-spring-boot-starter -am test

10. Troubleshooting

Symptom	Diagnosis	Resolution
Bean not created	Check auto-configuration report	Verify karaf.enabled=true and classpath
ClassNotFoundException	Missing dependency	Add the required module
Version conflict	mvn dependency:tree	Use BOM for version alignment

11. Contribution

1. Fork the repository.
2. Create a feature branch.
3. Run mvn clean verify before submitting.
4. Submit a pull request.

12. License

This project is licensed under the Apache License, Version 2.0.

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