请求路由到业务方法设计（1）－我们到底能走多远系列(43)

public interface RemoteOpenService {    public JSON executeOpenService(JSON json, String method);}public class RemoteOpenServiceImpl implements RemoteOpenService{    @Override    public JSON executeOpenService(JSON json, String method) {        JSON returnJson = null;        BaseService service = (BaseService) OpenServiceRouter.getRouterMap().get(method);        returnJson = service.execute(json, ExampleRequest.class);                return returnJson;    }    }

OpenServiceRouter：

public class OpenServiceRouter {    private static Map<String, Object> routerMap;        public static Map<String, Object> getRouterMap(){        if(routerMap != null){            return routerMap;        }        routerMap = new HashMap<String, Object>();        routerMap.put("example", "exampleService");        return routerMap;    }        }

模版方法设计：实际执行的时service的excute方法，而这个方法执行中把业务部分的实现留给子类实现。

public interface BaseService {    public JSON execute(JSON json, Class c);}public abstract class AbstractBaseService implements BaseService{    // TODO    public final Request decode(JSON json, Class c){        ObjectMapper mapper = new ObjectMapper();        Request request = null;        try {            request = mapper.readValue(json.toJSONString(), c);        } catch (JsonParseException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (JsonMappingException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }         return request;    }    // TODO    public final JSON encode(Response response){        ObjectMapper mapper = new ObjectMapper();                  // Convert object to JSON string          JSON json = null;        try {            String j =  mapper.writeValueAsString(response);            json = JSON.parSEObject(j);        } catch (JsonGenerationException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (JsonMappingException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return json;    }        /**     * 子类不同实现具体逻辑     * @param request     */    public abstract Response doService(Request request);        /**     * 模版执行方法     * @param json     */    public final JSON execute(JSON json, Class c){        Request request = this.decode(json, c);        Response response = doService(request);        JSON retrunJson = this.encode(response);        return retrunJson;    }}

子类的实现：

public class ExampleServiceImpl extends AbstractBaseService{    @Override    public Response doService(Request request) {        ExampleRequest exampleRequest = (ExampleRequest)request;                return null;    }}

因为刚好需要设计一个这样的被调用的组件，我就想好多地方会遇到这个场景，所以值得深入进来研究一下，以上是我想，不参考任何框架，以最原始的方式去实现一个这样的请求路由。作为笔记的一部分，先开个头，后续研究下其他框架对这个问题的设计。