(servlet) Model추가

Author: mike6321

servlet/src/main/java/me/choi/servlet/web/frontcontroller/ModelView.java

@@ -11,10 +11,10 @@
  * Time : 11:00 오후
  */
 public class ModelView {
-    private String viewName;
-    private Map<String, Object> model = new HashMap<>();
+    private final String viewName;
+    private final Map<String, Object> model = new HashMap<>();
 
-    public ModelView(String viewName) {
+    public ModelView(final String viewName) {
         this.viewName = viewName;
     }
 

servlet/src/main/java/me/choi/servlet/web/frontcontroller/MyView.java

@@ -5,6 +5,7 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
+import java.util.Map;
 
 /**
  * Project : servlet
@@ -14,14 +15,24 @@
  * Time : 9:58 오후
  */
 public class MyView {
-    private String viewPath;
+    private final String viewPath;
 
-    public MyView(String viewPath) {
+    public MyView(final String viewPath) {
         this.viewPath = viewPath;
     }
 
-    public void render(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-        RequestDispatcher dispatcher = request.getRequestDispatcher(viewPath);
+    public void render(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException {
+        final RequestDispatcher dispatcher = request.getRequestDispatcher(viewPath);
         dispatcher.forward(request, response);
     }
+
+    public void render(final Map<String, Object> model, final HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        modelToRequestAttribute(model, request);
+        final RequestDispatcher dispatcher = request.getRequestDispatcher(viewPath);
+        dispatcher.forward(request, response);
+    }
+
+    private void modelToRequestAttribute(final Map<String, Object> model, final HttpServletRequest request) {
+        model.forEach(request::setAttribute);
+    }
 }

servlet/src/main/java/me/choi/servlet/web/frontcontroller/version03/ControllerV3.java

@@ -0,0 +1,18 @@
+package me.choi.servlet.web.frontcontroller.version03;
+
+import me.choi.servlet.web.frontcontroller.ModelView;
+
+import java.util.Map;
+
+/**
+ * Project : servlet
+ *
+ * @author : jwdeveloper
+ * @comment :
+ * Time : 9:31 오후
+ */
+public interface ControllerV3 {
+
+    ModelView process(final Map<String, String> paramMap);
+
+}

servlet/src/main/java/me/choi/servlet/web/frontcontroller/version03/FrontControllerServletV3.java

@@ -0,0 +1,68 @@
+package me.choi.servlet.web.frontcontroller.version03;
+
+import me.choi.servlet.web.frontcontroller.ModelView;
+import me.choi.servlet.web.frontcontroller.MyView;
+import me.choi.servlet.web.frontcontroller.version03.controller.MemberFormControllerV3;
+import me.choi.servlet.web.frontcontroller.version03.controller.MemberListControllerV3;
+import me.choi.servlet.web.frontcontroller.version03.controller.MemberSaveControllerV3;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Project : servlet
+ *
+ * @author : jwdeveloper
+ * @comment : 현재의 문제점 : HttpServletRequest, HttpServletResponse등의 사용하지 않는 코드가 너무 많다.
+ * Time : 9:13 오후
+ */
+@WebServlet(name = "frontControllerServletV3", urlPatterns = "/front-controller/v3/*")
+public class FrontControllerServletV3 extends HttpServlet {
+
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    private final Map<String, ControllerV3> controllerMap = new HashMap<>();
+
+    public FrontControllerServletV3() {
+        this.controllerMap.put("/front-controller/v3/members/new-form", new MemberFormControllerV3());
+        this.controllerMap.put("/front-controller/v3/members/save", new MemberSaveControllerV3());
+        this.controllerMap.put("/front-controller/v3/members", new MemberListControllerV3());
+    }
+
+    @Override
+    protected void service(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException {
+
+        final String requestURI = request.getRequestURI();
+        final ControllerV3 controller = controllerMap.get(requestURI);
+
+        if (controller == null) {
+            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
+            return;
+        }
+
+        final Map<String, String> paramMap = createParamMap(request);
+        final ModelView mv = controller.process(paramMap);
+
+        final String viewName = mv.getViewName();// 논리이름
+        final MyView view = viewResolver(viewName);
+        view.render(mv.getModel(), request, response);
+    }
+
+    private MyView viewResolver(final String viewName) {
+        return new MyView("/WEB-INF/views/" + viewName + ".jsp");
+    }
+
+    private Map<String, String> createParamMap(final HttpServletRequest request) {
+        final Map<String, String> paramMap = new HashMap<>();
+        request.getParameterNames().asIterator()
+                .forEachRemaining(paramName -> paramMap.put(paramName, request.getParameter(paramName)));
+        return paramMap;
+    }
+}

servlet/src/main/java/me/choi/servlet/web/frontcontroller/version03/controller/MemberFormControllerV3.java

@@ -0,0 +1,21 @@
+package me.choi.servlet.web.frontcontroller.version03.controller;
+
+import me.choi.servlet.web.frontcontroller.ModelView;
+import me.choi.servlet.web.frontcontroller.version03.ControllerV3;
+
+import java.util.Map;
+
+/**
+ * Project : servlet
+ *
+ * @author : jwdeveloper
+ * @comment :
+ * Time : 9:33 오후
+ */
+public class MemberFormControllerV3 implements ControllerV3 {
+
+    @Override
+    public ModelView process(final Map<String, String> paramMap) {
+        return new ModelView("new-form");
+    }
+}

servlet/src/main/java/me/choi/servlet/web/frontcontroller/version03/controller/MemberListControllerV3.java

@@ -0,0 +1,32 @@
+package me.choi.servlet.web.frontcontroller.version03.controller;
+
+import me.choi.servlet.domain.member.Member;
+import me.choi.servlet.domain.member.MemberRepository;
+import me.choi.servlet.web.frontcontroller.ModelView;
+import me.choi.servlet.web.frontcontroller.version03.ControllerV3;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Project : servlet
+ *
+ * @author : jwdeveloper
+ * @comment :
+ * Time : 9:37 오후
+ */
+public class MemberListControllerV3 implements ControllerV3 {
+
+    private final MemberRepository memberRepository = MemberRepository.getInstance();
+
+    @Override
+    public ModelView process(final Map<String, String> paramMap) {
+
+        final List<Member> members = memberRepository.finalAll();
+        final ModelView mv = new ModelView("members");
+        mv.getModel().put("members", members);
+
+        return mv;
+    }
+
+}

servlet/src/main/java/me/choi/servlet/web/frontcontroller/version03/controller/MemberSaveControllerV3.java

@@ -0,0 +1,34 @@
+package me.choi.servlet.web.frontcontroller.version03.controller;
+
+import me.choi.servlet.domain.member.Member;
+import me.choi.servlet.domain.member.MemberRepository;
+import me.choi.servlet.web.frontcontroller.ModelView;
+import me.choi.servlet.web.frontcontroller.version03.ControllerV3;
+
+import java.util.Map;
+
+/**
+ * Project : servlet
+ *
+ * @author : jwdeveloper
+ * @comment :
+ * Time : 9:34 오후
+ */
+public class MemberSaveControllerV3 implements ControllerV3 {
+
+    private final MemberRepository memberRepository = MemberRepository.getInstance();
+
+    @Override
+    public ModelView process(final Map<String, String> paramMap) {
+
+        final String username = paramMap.get("username");
+        final int age = Integer.parseInt(paramMap.get("age"));
+
+        final Member member = new Member(username, age);
+        memberRepository.save(member);
+        final ModelView mv = new ModelView("save-result");
+        mv.getModel().put("member", member);
+
+        return mv;
+    }
+}