[ch06] 6.6 Use annotation to regiter bean with Reflections library.

Signed-off-by: Dongho Sim <dhsim86@gmail.com>

pom.xml

@@ -79,6 +79,13 @@
       <artifactId>commons-pool</artifactId>
       <version>1.6</version>
     </dependency>
+
+    <!-- https://mvnrepository.com/artifact/org.reflections/reflections -->
+	<dependency>
+	    <groupId>org.reflections</groupId>
+	    <artifactId>reflections</artifactId>
+	    <version>0.9.10</version>
+	</dependency>
 
   </dependencies>
 

src/main/java/Lesson05/MySqlMemberDao.java

@@ -1,13 +1,17 @@
 package Lesson05;
 
 import javax.sql.DataSource;
+
+import Lesson06.Component;
+
 import java.sql.*;
 import java.util.ArrayList;
 import java.util.List;
 
 /**
  * Created by Dongho on 2017. 3. 11..
  */
+@Component("memberDao")
 public class MySqlMemberDao implements MemberDao {
 
     DataSource dataSource;

src/main/java/Lesson06/ApplicationContext.java

@@ -1,13 +1,17 @@
 package Lesson06;
+
 import java.io.FileReader;
 import java.lang.reflect.Method;
 import java.util.Hashtable;
 import java.util.Properties;
+import java.util.Set;
 import java.util.regex.Pattern;
 
 import javax.naming.Context;
 import javax.naming.InitialContext;
 
+import org.reflections.Reflections;
+
 public class ApplicationContext {
 
 	Hashtable<String, Object> objTable = new Hashtable<>();
@@ -21,6 +25,7 @@ public ApplicationContext(String propertiesPath) throws Exception {
 		props.load(new FileReader(propertiesPath));
 
 		prepareObjects(props);
+		prepareAnnotationObjects();
 		injectDependency();
 	}
 
@@ -52,6 +57,19 @@ else if (key.startsWith(">")) {
 		}
 	}
 
+	private void prepareAnnotationObjects() throws Exception {
+
+		Reflections reflector = new Reflections();
+
+		Set<Class<?>> list = reflector.getTypesAnnotatedWith(Component.class);
+		String key = null;
+
+		for (Class<?> clazz : list) {
+			key = clazz.getAnnotation(Component.class).value();
+			objTable.put(key,  clazz.newInstance());
+		}
+	}
+
 	private void injectDependency() throws Exception {
 
 		for (String key : objTable.keySet()) {

src/main/java/Lesson06/Component.java

@@ -0,0 +1,9 @@
+package Lesson06;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Component {
+	String value() default "";
+}

src/main/java/Lesson06/MemberAddController.java

@@ -5,6 +5,7 @@
 import Lesson05.Member;
 import Lesson05.MemberDao;
 
+@Component("/member/add.do")
 public class MemberAddController implements Controller, DataBinding {
 
 	MemberDao memberDao;

src/main/java/Lesson06/MemberDeleteController.java

@@ -4,6 +4,7 @@
 
 import Lesson05.MemberDao;
 
+@Component("/member/delete.do")
 public class MemberDeleteController implements Controller, DataBinding {
 
 	MemberDao memberDao;

src/main/java/Lesson06/MemberListController.java

@@ -4,6 +4,7 @@
 
 import Lesson05.MemberDao;
 
+@Component("/member/list.do")
 public class MemberListController implements Controller {
 
 	MemberDao memberDao;

src/main/java/Lesson06/MemberLoginController.java

@@ -6,6 +6,7 @@
 import Lesson05.Member;
 import Lesson05.MemberDao;
 
+@Component("/auth/login.do")
 public class MemberLoginController implements Controller, DataBinding {
 
 	MemberDao memberDao;

src/main/java/Lesson06/MemberLogoutController.java

@@ -4,6 +4,7 @@
 
 import javax.servlet.http.HttpSession;
 
+@Component("/auth/logout.do")
 public class MemberLogoutController implements Controller, DataBinding {
 
 	@Override

src/main/java/Lesson06/MemberUpdateController.java

@@ -5,6 +5,7 @@
 import Lesson05.Member;
 import Lesson05.MemberDao;
 
+@Component("/member/update.do")
 public class MemberUpdateController implements Controller, DataBinding {
 
 	MemberDao memberDao;

src/main/webapp/WEB-INF/application-context.properties

@@ -1,8 +1 @@
-dataSource=org.apache.commons.dbcp.BasicDataSource
-memberDao=Lesson05.MySqlMemberDao
-/auth/login.do=Lesson06.MemberLoginController
-/auth/logout.do=Lesson06.MemberLogoutController
-/member/list.do=Lesson06.MemberListController
-/member/add.do=Lesson06.MemberAddController
-/member/update.do=Lesson06.MemberUpdateController
-/member/delete.do=Lesson06.MemberDeleteController
+dataSource=org.apache.commons.dbcp.BasicDataSource