服务提供者框架

服务提供者框架适用于"服务有多个实现"的解耦, 比如商城平台接口有淘宝, 天猫, 京东等多实现.

这里拿商城接口做示例, 结构如下图

MallServiceProvider中进行服务注册
MallService作为顶层服务接口, 当然还可以进一步根据业务功能细分, 比如OrderService ,ProductService(extends MallService) 等等
AbstractMallServic作为接口的抽象实现, 定义算法骨架, 提取具体实现中通用的操作, 比如通用校验等

MallServiceProvider

java

@Component
public class MallServiceProvider {
    private static final Map<MallType, MallService> MALL_SERVICE_MAP = new ConcurrentHashMap<>();

    public MallServiceProvider(List<MallService> mallServices) {
        for (MallService mallService : mallServices) {
            for (MallType mallType : mallService.supports()) {
                MALL_SERVICE_MAP.put(mallType, mallService);
            }
        }
    }

    public MallService getMallService(MallType mallType) {
        return MALL_SERVICE_MAP.getOrDefault(mallType, MALL_SERVICE_MAP.get(MallType.DEFAULT));
    }
}

MallService

java

/**
 * @author xinzhang
 * @date 2021/1/29 14:09
 */
public interface MallService {
    /**
     * 示例方法
     */
    void demoFunction();

    /**
     * 支持哪些平台
     *
     * @return
     */
    MallType[] supports();
}

AbstractMallService

java

/**
 * @author xinzhang
 * @date 2021/1/29 14:11
 */
public abstract class AbstractMallService implements MallService {
    @Override
    public void demoFunction() {
        System.out.println("一些通用校验以及处理, 巴拉巴拉");
        doDemoFunction();
    }

    /**
     * 具体实现
     */
    protected abstract void doDemoFunction();
}

DefaultMallService

java

@Component
public class DefaultMallService extends AbstractMallService {
    @Override
    protected void doDemoFunction() {

    }

    @Override
    public MallType[] supports() {
        return new MallType[]{
                MallType.DEFAULT
        };
    }
}

JdMallService

java

@Component
public class JdMallService extends AbstractMallService {
    @Override
    protected void doDemoFunction() {
        System.out.println("这里是京东商城服务");
    }

    @Override
    public MallType[] supports() {
        return new MallType[]{
                MallType.JD
        };
    }
}

TaoBaoMallService

java

@Component
public class TaoBaoMallService extends AbstractMallService {
    @Override
    protected void doDemoFunction() {
        System.out.println("这里是淘宝, 天猫平台服务");
    }

    @Override
    public MallType[] supports() {
        return new MallType[]{
                MallType.TAOBAO, MallType.TMALL
        };
    }
}

MallType枚举

java

public enum MallType {
    DEFAULT("默认空实现", 0),
    TAOBAO("淘宝", 1),
    TMALL("天猫", 2),
    JD("京东", 3);
    private final String caption;
    private final int value;

    MallType(String caption, int value) {
        this.caption = caption;
        this.value = value;
    }

    public int value() {
        return this.value;
    }
}

测试

java

@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoApplicationTests {
    @Autowired
    private MallServiceProvider mallServiceProvider;

    @Test
    public void testConfiguration() {
        MallService mallService = mallServiceProvider.getMallService(MallType.TAOBAO);
        mallService.demoFunction();
    }
}
--------------输出
一些通用校验以及处理, 巴拉巴拉
这里是淘宝, 天猫平台服务

服务提供者框架 ​

服务提供者框架