diff --git a/logging-log4j2/src/main/java/com/mkyong/HelloController.java b/logging-log4j2/src/main/java/com/mkyong/HelloController.java
index 7888d94..4b6aa09 100644
--- a/logging-log4j2/src/main/java/com/mkyong/HelloController.java
+++ b/logging-log4j2/src/main/java/com/mkyong/HelloController.java
@@ -36,5 +36,8 @@ public String main(Model model) {
     private int getNum() {
         return 100;
     }
+    public int setNum(int num){
+        this.num=num;
+    }
 
 }
diff --git a/logging-slf4j-logback/src/main/java/com/mkyong/HelloController.java b/logging-slf4j-logback/src/main/java/com/mkyong/HelloController.java
index 7421d58..cd94a43 100644
--- a/logging-slf4j-logback/src/main/java/com/mkyong/HelloController.java
+++ b/logging-slf4j-logback/src/main/java/com/mkyong/HelloController.java
@@ -25,5 +25,9 @@ public String hello(Model model) {
 
         return "index"; // index.html
     }
+    public int getId(){
+        return 10;
+        
+    }
 
 }
\ No newline at end of file
diff --git a/profile-simple/src/main/java/com/mkyong/service/RainingDayService.java b/profile-simple/src/main/java/com/mkyong/service/RainingDayService.java
index 0192ae1..0c72b1c 100644
--- a/profile-simple/src/main/java/com/mkyong/service/RainingDayService.java
+++ b/profile-simple/src/main/java/com/mkyong/service/RainingDayService.java
@@ -11,5 +11,9 @@ public class RainingDayService implements WeatherService {
     public String forecast() {
         return "Today is raining day!";
     }
+    public String getName(){
+        return name;
+        
+    }
 
 }
diff --git a/spring-boot-jobrunr/src/main/java/com/mkyong/api/JobController.java b/spring-boot-jobrunr/src/main/java/com/mkyong/api/JobController.java
index 2ba1212..b16d8e8 100644
--- a/spring-boot-jobrunr/src/main/java/com/mkyong/api/JobController.java
+++ b/spring-boot-jobrunr/src/main/java/com/mkyong/api/JobController.java
@@ -47,5 +47,23 @@ public String scheduleJob(
 
         return "Job is scheduled.";
     }
+    public String updateJobInfo(){
+        return null;
+    }
+public String fetchjobInfo(){
+
+    return null;
+} 
+public String fetchJobById(){
 
+    return null;
+}
+public String fetchById(){
+    return null;
+}
+    public Response createUser(){
+        return null;
+}
+public Response updateUser(){
+    return null;
 }
diff --git a/spring-data-jpa-mysql/src/main/java/com/mkyong/BookRepository.java b/spring-data-jpa-mysql/src/main/java/com/mkyong/BookRepository.java
index 43043a3..d174ea3 100644
--- a/spring-data-jpa-mysql/src/main/java/com/mkyong/BookRepository.java
+++ b/spring-data-jpa-mysql/src/main/java/com/mkyong/BookRepository.java
@@ -8,4 +8,19 @@ public interface BookRepository extends CrudRepository<Book, Long> {
 
     List<Book> findByName(String name);
 
+    List<Book> findById(int id);
+
+    List<Book> findByPrice(int price);
+
+    List<Book> deleteById(int id);
+
+    List<Book> findByIdAndName(int id,String name);
+
+    List<Book> fetchById(int id);
+
+    List<Book> findByUnAndPwd(String un,String pwd);
+
+    List<Book> findByPrice(int price);
+    
+
 }
diff --git a/spring-data-jpa-postgresql/src/main/java/com/mkyong/BookRepository.java b/spring-data-jpa-postgresql/src/main/java/com/mkyong/BookRepository.java
index 43043a3..53367d7 100644
--- a/spring-data-jpa-postgresql/src/main/java/com/mkyong/BookRepository.java
+++ b/spring-data-jpa-postgresql/src/main/java/com/mkyong/BookRepository.java
@@ -7,5 +7,7 @@
 public interface BookRepository extends CrudRepository<Book, Long> {
 
     List<Book> findByName(String name);
+    
+    public User findByUnAndPwd(String un,String pwd);
 
 }
diff --git a/spring-data-jpa/src/main/java/com/mkyong/BookRepository.java b/spring-data-jpa/src/main/java/com/mkyong/BookRepository.java
index 43043a3..04df597 100644
--- a/spring-data-jpa/src/main/java/com/mkyong/BookRepository.java
+++ b/spring-data-jpa/src/main/java/com/mkyong/BookRepository.java
@@ -7,5 +7,11 @@
 public interface BookRepository extends CrudRepository<Book, Long> {
 
     List<Book> findByName(String name);
+    
+    public <User> fetchByName(String name);
+
+    public <User> fetchById(int id);
+
+    public <User> fetchJobById(int id);
 
 }
diff --git a/spring-rest-security/src/main/java/com/mkyong/BookController.java b/spring-rest-security/src/main/java/com/mkyong/BookController.java
index 076f002..ab75013 100644
--- a/spring-rest-security/src/main/java/com/mkyong/BookController.java
+++ b/spring-rest-security/src/main/java/com/mkyong/BookController.java
@@ -85,5 +85,12 @@ Book patch(@RequestBody Map<String, String> update, @PathVariable Long id) {
     void deleteBook(@PathVariable Long id) {
         repository.deleteById(id);
     }
-
+    @GetMapping("/getall")
+    public List <Book> getAllBooks(){
+        repository.findAll();
+    }
+    @PutMapping("/updatebook")
+public Book updateBook(@RequeatBody Book book){
+    return null;
+}
 }
diff --git a/testing-junit5-mockito/src/main/java/com/mkyong/core/controller/MainController.java b/testing-junit5-mockito/src/main/java/com/mkyong/core/controller/MainController.java
index 79b028f..58e7db9 100644
--- a/testing-junit5-mockito/src/main/java/com/mkyong/core/controller/MainController.java
+++ b/testing-junit5-mockito/src/main/java/com/mkyong/core/controller/MainController.java
@@ -12,5 +12,14 @@ public class MainController {
     public String hello() {
         return "Hello Controller";
     }
-
+    @PostMapping("/create")
+    public Emp createEmps(@RequestBody Emp emp){
+        return save(emp);
+    }
+    @GetMapping("/getbyid/{id})
+    public Emp getByEmpId(@PathVariable int id){
+        return getEmpById(id);
+}
+public String deleteId(){
+    return null;
 }
diff --git a/testing-junit5-mockito/src/main/java/com/mkyong/core/repository/HelloRepository.java b/testing-junit5-mockito/src/main/java/com/mkyong/core/repository/HelloRepository.java
index 4cea250..fbf4225 100644
--- a/testing-junit5-mockito/src/main/java/com/mkyong/core/repository/HelloRepository.java
+++ b/testing-junit5-mockito/src/main/java/com/mkyong/core/repository/HelloRepository.java
@@ -2,4 +2,8 @@
 
 public interface HelloRepository {
     String get();
+
+}
+public inteface HiRepository{
+    return null;
 }