1. 创建SPI服务

1.1 在META-INF/services目录下创建相关服务文件

1.2 实现相关服务

1.3 在相关服务文件中指向实现服务

com.alibaba.edas.carshop.itemcenter.service.SingletonService
com.alibaba.edas.carshop.itemcenter.service.PrototypeService

2.相关注解

2.1 @Scope

指定获取实例是单例还是每次创建新实例

public @interface Scope {
    Scope.Option value() default Scope.Option.SINGLETON;

    public static enum Option {
        SINGLETON,
        PROTOTYPE;

        private Option() {
        }
    }
}

2.2 @Name

为服务命名,可以通过命名的key来获取服务

2.3 @Tag

为服务打标签分组,跟@Name不同的地方是@Tag可以重复

2.4 @Order

为服务排序

2.5 注解测试

测试类

@Scope(Scope.Option.SINGLETON)
@Name("singletonService")
@Tag("singletonTagService")
@Order(2)
public class SingletonService implements NameService {

    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public SingletonService()
    {
        name="SINGLETON";
    }
}

@Scope(Scope.Option.PROTOTYPE)
@Name("prototypeService")
@Tag("prototypeTagService")
@Order(1)
public class PrototypeService implements NameService {

    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public PrototypeService()
    {
        name="PROTOTYPE";
    }
}

测试Demo

public class NameServiceTest {

    @Test
    public void test1()
    {
        //测试@Scope中的PROTOTYPE & @Order
        {
            List<NameService> service= HSFServiceContainer.getInstances(NameService.class, new String[0]);
            System.out.print(service);
        }

        {
            List<NameService> service= HSFServiceContainer.getInstances(NameService.class, new String[0]);
            System.out.print(service);
        }

        //测试@Name
        {
            NameService service= HSFServiceContainer.getInstance(NameService.class, "singletonService");
            System.out.print(service);
        }

        {
            NameService service= HSFServiceContainer.getInstance(NameService.class, "prototypeService");
            System.out.print(service);
        }

        //测试@Tag
        {
            List<NameService> service= HSFServiceContainer.getInstances(NameService.class, "prototypeTagService");
            System.out.print(service);
        }
    }
}

3.服务初始化生命周期

在第一次实例创建的时候,接受FrameworkModelAware和ApplicationModelAware2个接口来获取FrameworkModel和ApplicationModel

    private void awareInstance(Object instance) {
        if (instance instanceof FrameworkModelAware) {
            ((FrameworkModelAware)instance).setFrameworkModel(ApplicationModel.frameworkModel);
        }

        if (instance instanceof ApplicationModelAware && this.application != null) {
            ((ApplicationModelAware)instance).setApplicationModel(this.application);
        }
    }