pf4j spring 插件配置处理

pf4j spring 提供的spring 能力有点弱，但是我们可以自己扩展实现spring 插件类似spring boot 的配置处理能力

问题

比如我们需要实现如下的配置，自定转换，但是因为默认的spring 项目是不直接支持此特性的

@Configuration
@PropertySource(name ="dalongdemo",value = "classpath:app.yaml")
public class MyConfigProperties {
    private   String name;
    private   int age;
    private String demoname;
 
    public String getDemoname() {
        return demoname;
    }
 
    public void setDemoname(String demoname) {
        this.demoname = demoname;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public int getAge() {
        return age;
    }
 
    public void setAge(int age) {
        this.age = age;
    }
 
    @Override
    public String toString() {
        return "MyConfigProperties{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", demoname='" + demoname + '\'' +
                '}';
    }
}

解决方法

可以在spring 插件的 createApplicationContext 中进行ConfigurationPropertiesBindingPostProcessor 注册，这样我们就能使用此功能了
参考

 
applicationContext.register(PluginCConfig.class,MyConfigProperties.class, ConfigurationPropertiesBindingPostProcessor.class);

yaml 格式prefix 问题

此问题就需要强制指定下

@EnableConfigurationProperties(MyConfigProperties.class)

同时还需要自定义一个prefix 处理的，比如基于yaml 的

public class YamlPropertySourceFactory implements PropertySourceFactory {
    @Override
    public PropertySource<?> createPropertySource(String name, EncodedResource encodedResource)
            throws IOException {
        YamlPropertiesFactoryBean factory = new YamlPropertiesFactoryBean();
        factory.setResources(encodedResource.getResource());
        Properties properties = factory.getObject();
        return new PropertiesPropertySource(encodedResource.getResource().getFilename(), properties);
    }
}

property 类

@ConfigurationProperties(prefix = "demoapp")
@Configuration
@PropertySource(name ="dalongdemo",value = "classpath:app.yaml",factory = YamlPropertySourceFactory.class)
public class MyConfigProperties {
    private   String name;
    private   int age;
    private String demoname;
 
    public String getDemoname() {
        return demoname;
    }
 
    public void setDemoname(String demoname) {
        this.demoname = demoname;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public int getAge() {
        return age;
    }
 
    public void setAge(int age) {
        this.age = age;
    }
 
    @Override
    public String toString() {
        return "MyConfigProperties{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", demoname='" + demoname + '\'' +
                '}';
    }
}
 

yaml 文件

demoapp:
   name: demo
   age: 333

参考资料

https://www.baeldung.com/spring-boot-testing-configurationproperties
https://docs.spring.io/spring-boot/docs/current/api/org/springframework/boot/context/properties/ConfigurationProperties.html
https://docs.spring.io/spring-boot/docs/2.1.13.RELEASE/reference/html/boot-features-external-config.html
https://github.com/rongfengliang/pf4j-spring-learning/tree/classloader-test

posted on 2022-03-23 13:25  荣锋亮  阅读(570)  评论(0)  编辑  收藏  举报

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