pf4j2-spring-boot-starter

Spring Boot Starter for pf4j2

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

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Current Version：2.0.0.RELEASE
JDK Baseline：17
Group ID：io.github.easy4j
Artifact ID：pf4j2-spring-boot-starter
License：Apache License 2.0

1. Positioning

pf4j2-spring-boot-starter is a Spring Boot starter that integrates pf4j2 for applications using pf4j2. It provides auto-configuration, property binding, and ready-to-use beans so that applications can consume pf4j2 capabilities with minimal setup.

Dimension	Description
Type	Spring Boot Starter
Consumers	Spring Boot applications using pf4j2
Core Capabilities	auto-configuration, property binding, ready-to-use beans for pf4j2
JDK	17
Coordinates	io.github.easy4j:pf4j2-spring-boot-starter:2.0.0.RELEASE
Config Prefix	pf4j2

2. Core Capabilities

Capability	Status	Description
Auto-configuration	✅ Stable	Registers pf4j2 beans automatically
Property Binding	✅ Stable	Binds pf4j2.* to Pf4jMavenProperties
Pf4jDynamicControllerRegistry bean	✅ Stable	Auto-registered via Pf4jAutoConfiguration, Pf4jMavenAutoConfiguration, Pf4jUpdateAutoConfiguration

3. Requirements and Compatibility

Dependency	Minimum	Evidence
JDK	17	pom.xml
Spring Boot	2.6.0	pom.xml parent
Maven	3.6+	Maven Enforcer

4. Auto-configuration

The starter auto-configures the following beans:

Bean	Condition	Missing Behavior
Pf4jDynamicControllerRegistry	classpath + property	not created
PluginStateListener	classpath + property	not created
PluginManager	classpath + property	not created
PluginInfoProvider	classpath + property	not created
MavenUpdateRepository	classpath + property	not created
UpdateManager	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>pf4j2-spring-boot-starter</artifactId>
    <version>2.0.0.RELEASE</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

pf4j2:
  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 Pf4jDynamicControllerRegistry pf4jDynamicControllerRegistry;

7. Configuration Reference

7.1 Config Prefix

pf4j2

7.2 Configuration Items

Property	Type	Default	Required	Description	Sensitive
pf4j2.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 pf4j2-spring-boot-starter -am test

10. Troubleshooting

Symptom	Diagnosis	Resolution
Bean not created	Check auto-configuration report	Verify pf4j2.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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