Building

.gitignore

@@ -1,5 +1,5 @@
 HELP.md
-target/
+#target/
 !.mvn/wrapper/maven-wrapper.jar
 !**/src/main/**/target/
 !**/src/test/**/target/

README.md

@@ -0,0 +1,3 @@
+# BasicSpringBootAPI
+
+Efficient REST API crafted using Core Java and Spring Boot, enabling smooth CRUD operations on an employee database. 

src/main/java/com/manumiguezz/crudapplication/CrudapplicationApplication.java → src/main/java/com/manumiguezz/crudapplication/CrudApplication.java

@@ -4,10 +4,10 @@
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 @SpringBootApplication
-public class CrudapplicationApplication {
+public class CrudApplication {
 
 	public static void main(String[] args) {
-		SpringApplication.run(CrudapplicationApplication.class, args);
+		SpringApplication.run(CrudApplication.class, args);
 	}
 
 }

src/main/java/com/manumiguezz/crudapplication/dao/EmployeeDAO.java

@@ -0,0 +1,15 @@
+//package com.manumiguezz.crudapplication.dao;
+//
+//import com.manumiguezz.crudapplication.entity.Employee;
+//
+//import java.util.List;
+//
+//public interface EmployeeDAO {
+//    List<Employee> findAll();
+//
+//    Employee findById(int theId);
+//
+//    Employee save(Employee theEmployee);
+//
+//    void deleteByID(int theId);
+//}

src/main/java/com/manumiguezz/crudapplication/dao/EmployeeDAOJpaImpl.java

@@ -0,0 +1,50 @@
+//package com.manumiguezz.crudapplication.dao;
+//
+//import com.manumiguezz.crudapplication.entity.Employee;
+//import jakarta.persistence.EntityManager;
+//import jakarta.persistence.TypedQuery;
+//import org.springframework.beans.factory.annotation.Autowired;
+//import org.springframework.stereotype.Repository;
+//
+//import java.util.List;
+//
+//@Repository
+//public class EmployeeDAOJpaImpl implements EmployeeDAO {
+//
+//    private EntityManager entityManager;
+//
+//    @Autowired
+//    public EmployeeDAOJpaImpl(EntityManager theEntityManager) {
+//        entityManager = theEntityManager;
+//    }
+//
+//    @Override
+//    public List<Employee> findAll() {
+//
+//        TypedQuery<Employee> theQuery = entityManager.createQuery("from Employee", Employee.class);
+//
+//        List<Employee> employees = theQuery.getResultList();
+//
+//        return employees;
+//    }
+//
+//    @Override
+//    public Employee findById(int theId) {
+//        Employee theEmployee = entityManager.find(Employee.class, theId);
+//        return theEmployee;
+//    }
+//
+//    @Override
+//    public Employee save(Employee theEmployee) {
+//        // if ID of passed employee is equal to 0, it will insert a new one, else it will just update
+//        Employee dbEmployee = entityManager.merge(theEmployee);
+//        return dbEmployee;
+//    }
+//
+//    @Override
+//    public void deleteByID(int theId) {
+//        Employee theEmployee = entityManager.find(Employee.class, theId);
+//        entityManager.remove(theEmployee);
+//    }
+//
+//}

src/main/java/com/manumiguezz/crudapplication/dao/EmployeeRepository.java

@@ -0,0 +1,7 @@
+package com.manumiguezz.crudapplication.dao;
+
+import com.manumiguezz.crudapplication.entity.Employee;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface EmployeeRepository  extends JpaRepository<Employee, Integer> {
+}

src/main/java/com/manumiguezz/crudapplication/entity/Employee.java

@@ -0,0 +1,74 @@
+package com.manumiguezz.crudapplication.entity;
+
+import jakarta.persistence.*;
+
+@Entity
+@Table(name = "employee")
+public class Employee {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private int id;
+
+    @Column(name = "first_name")
+    private String firstName;
+
+    @Column(name = "last_name")
+    private String lastName;
+
+    @Column(name = "email")
+    private String email;
+
+    public Employee () {
+
+    }
+
+    public Employee(String firstName, String lastName, String email) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.email = email;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    @Override
+    public String toString() {
+        return "Employee{" +
+                "id=" + id +
+                ", firstName='" + firstName + '\'' +
+                ", lastName='" + lastName + '\'' +
+                ", email='" + email + '\'' +
+                '}';
+    }
+}

src/main/java/com/manumiguezz/crudapplication/rest/EmployeeRestController.java

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+package com.manumiguezz.crudapplication.rest;
+
+import com.manumiguezz.crudapplication.dao.EmployeeDAO;
+import com.manumiguezz.crudapplication.entity.Employee;
+import com.manumiguezz.crudapplication.service.EmployeeService;
+import com.manumiguezz.crudapplication.service.EmployeeServiceImpl;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api")
+public class EmployeeRestController {
+
+    private EmployeeService employeeService;
+
+    public EmployeeRestController (EmployeeService theEmployeeService) {
+        employeeService = theEmployeeService;
+    }
+
+    @GetMapping("/employees")
+    public List<Employee> findAll(){
+        return employeeService.findAll();
+    }
+
+    @GetMapping("/employees/{employeeId}")
+    public Employee getEmployee(@PathVariable int employeeId) {
+        Employee theEmployee = employeeService.findById(employeeId);
+
+        if (theEmployee == null) {
+            throw new RuntimeException("Employee id not found - " + employeeId);
+        }
+
+        return theEmployee;
+    }
+
+    @PostMapping ("/employees")
+    public Employee addEmployee(@RequestBody Employee theEmployee) {
+
+        theEmployee.setId(0);
+
+        Employee dbEmployee = employeeService.save(theEmployee);
+        return dbEmployee;
+    }
+
+    @PutMapping("/employees")
+    public Employee updateEmployee(@RequestBody Employee theEmployee) {
+        Employee dbEmployee = employeeService.save(theEmployee);
+        return dbEmployee;
+    }
+
+    @DeleteMapping("/employees/{employeeId} ")
+    public String deleteEmployee(@PathVariable int employeeId) {
+        Employee tempEmployee = employeeService.findById(employeeId);
+
+        if (tempEmployee == null) {
+            throw new RuntimeException("Employee id: " + employeeId + " not found");
+        }
+
+        employeeService.deleteByID(employeeId);
+
+        return "Employee with id: " + employeeId + " was deleted";
+    }
+
+
+
+
+}

src/main/java/com/manumiguezz/crudapplication/service/EmployeeService.java

@@ -0,0 +1,16 @@
+package com.manumiguezz.crudapplication.service;
+
+import com.manumiguezz.crudapplication.entity.Employee;
+
+import java.util.List;
+
+public interface EmployeeService {
+    List<Employee> findAll();
+
+    Employee findById(int theId);
+
+    Employee save(Employee theEmployee);
+
+    void deleteByID(int theId);
+
+}

src/main/java/com/manumiguezz/crudapplication/service/EmployeeServiceImpl.java

@@ -0,0 +1,53 @@
+package com.manumiguezz.crudapplication.service;
+
+import com.manumiguezz.crudapplication.dao.EmployeeDAO;
+import com.manumiguezz.crudapplication.dao.EmployeeRepository;
+import com.manumiguezz.crudapplication.entity.Employee;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class EmployeeServiceImpl implements EmployeeService{
+
+    private EmployeeRepository employeeRepository;
+
+    @Autowired
+    public EmployeeServiceImpl (EmployeeRepository theEmployeeRepository) {
+        employeeRepository = theEmployeeRepository;
+    }
+
+    @Override
+    public List<Employee> findAll() {
+        return employeeRepository.findAll();
+    }
+
+    @Override
+    public Employee findById(int theId) {
+        Optional<Employee> result = employeeRepository.findById(theId);
+
+        Employee theEmployee;
+
+        if (result.isPresent()) {
+            theEmployee = result.get();
+        }
+        else {
+            throw new RuntimeException("Did not find employee id: " + theId);
+        }
+
+        return theEmployee;
+    }
+
+    @Override
+    public Employee save(Employee theEmployee) {
+        return employeeRepository.save(theEmployee);
+    }
+
+    @Override
+    public void deleteByID(int theId) {
+        employeeRepository.deleteById(theId);
+    }
+}

src/main/resources/application.properties

@@ -1,3 +1,4 @@
 
+spring.datasource.url=jdbc:mysql://localhost:3306/employee_directory
 spring.datasource.username=springstudent
 spring.datasource.password=springstudent

target/classes/application.properties

@@ -0,0 +1,4 @@
+
+spring.datasource.url=jdbc:mysql://localhost:3306/employee_directory
+spring.datasource.username=springstudent
+spring.datasource.password=springstudent