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rajeshkawalirajeshkawali
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Validation and Exception handling
1 parent ca529bf commit 0bd28a3

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+472
-3
lines changed

‎pom.xml

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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-data-jpa</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-validation</artifactId>
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</dependency>
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<dependency>
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<groupId>com.h2database</groupId>
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<artifactId>h2</artifactId>

‎src/main/java/com/rajeshkawali/controller/EmployeeController.java

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package com.rajeshkawali.controller;
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import com.rajeshkawali.model.EmployeeDTO;
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import com.rajeshkawali.model.Person;
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import com.rajeshkawali.service.EmployeeService;
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import jakarta.validation.Valid;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.http.HttpStatus;
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import org.springframework.http.ResponseEntity;
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import org.springframework.web.bind.annotation.*;
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import java.util.List;
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/**
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* @author Rajesh_Kawali
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*/
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@Slf4j
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@RestController
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@RequestMapping("/api")
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public class EmployeeController {
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public static final String CLASS_NAME = EmployeeController.class.getName();
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@Autowired
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private EmployeeService service;
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@PostMapping("/addEmployee")
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public ResponseEntity<EmployeeDTO> addEmployee(@RequestBody @Valid EmployeeDTO employee) {
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String _function = ".addEmployee";
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log.info(CLASS_NAME + _function + "::ENTER");
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EmployeeDTO employeeDTO = service.addEmployee(employee);
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log.info(CLASS_NAME + _function + "::EXIT");
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return ResponseEntity.status(HttpStatus.CREATED).body(employeeDTO);
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}
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@GetMapping(value = "/getAllEmployee")
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public List<EmployeeDTO> getAllEmployee() {
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String _function = ".getAllEmployee";
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log.info(CLASS_NAME + _function + "::ENTER");
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return service.getAllEmployee();
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}
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@GetMapping(value = "/findByEmployeeId/{id}")
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public EmployeeDTO findByEmployeeId(@PathVariable Long id) {
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String _function = ".findByEmployeeId";
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log.info(CLASS_NAME + _function + "::ENTER");
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return service.findByEmployeeId(id);
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}
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}

‎src/main/java/com/rajeshkawali/entity/Employee.java

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package com.rajeshkawali.entity;
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import com.fasterxml.jackson.annotation.JsonFormat;
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import jakarta.persistence.*;
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import jakarta.validation.constraints.*;
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import lombok.AllArgsConstructor;
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import lombok.Data;
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import lombok.NoArgsConstructor;
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import java.util.Date;
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/**
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* @author Rajesh_Kawali
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*/
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@Data
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@AllArgsConstructor
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@NoArgsConstructor
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@Entity
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@Table(name = "employee")
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public class Employee {
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@Id
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@GeneratedValue(strategy = GenerationType.AUTO)
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private Long id;
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@Column(name = "firstName")
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private String firstName;
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@Column(name = "lastName")
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private String lastName;
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@Column(name = "doj")
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private Date doj;
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@Column(name = "dept")
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private String dept;
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@Column(name = "email")
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private String email;
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@Column(name = "mobile")
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private String mobile;
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@Column(name = "gender")
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private String gender;
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@Column(name = "age")
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private int age;
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@Column(name = "aboutMe", length = 500)
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private String aboutMe;
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@Column(name = "nationality")
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private String nationality;
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}

‎src/main/java/com/rajeshkawali/exception/ApplicationExceptionHandler.java

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package com.rajeshkawali.exception;
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import org.springframework.http.HttpStatus;
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import org.springframework.web.bind.MethodArgumentNotValidException;
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import org.springframework.web.bind.annotation.ExceptionHandler;
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import org.springframework.web.bind.annotation.ResponseStatus;
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import org.springframework.web.bind.annotation.RestControllerAdvice;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* @author Rajesh_Kawali
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*/
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@RestControllerAdvice
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public class ApplicationExceptionHandler {
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@ResponseStatus(HttpStatus.BAD_REQUEST)
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@ExceptionHandler(MethodArgumentNotValidException.class)
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public Map<String, String> handleInvalidArgument(MethodArgumentNotValidException ex) {
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Map<String, String> errorMap = new HashMap<>();
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ex.getBindingResult().getFieldErrors().forEach(error -> {
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errorMap.put(error.getField(), error.getDefaultMessage());
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});
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return errorMap;
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}
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@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
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@ExceptionHandler(EmployeeNotFoundException.class)
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public Map<String, String> handleBusinessException(EmployeeNotFoundException ex) {
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Map<String, String> errorMap = new HashMap<>();
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errorMap.put("errorMessage", ex.getMessage());
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return errorMap;
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}
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}

‎src/main/java/com/rajeshkawali/exception/EmployeeNotFoundException.java

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package com.rajeshkawali.exception;
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/**
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* @author Rajesh_Kawali
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*
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*/
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public class EmployeeNotFoundException extends Exception {
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public EmployeeNotFoundException() {
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super();
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}
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public EmployeeNotFoundException(String message) {
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super(message);
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}
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}

‎src/main/java/com/rajeshkawali/lombok/Actor.java

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import lombok.experimental.SuperBuilder;
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import java.util.List;
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/**
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* @author Rajesh_Kawali
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*/
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@Data
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@SuperBuilder
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@EqualsAndHashCode(callSuper = true, onlyExplicitlyIncluded = true)

‎src/main/java/com/rajeshkawali/lombok/Address.java

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import lombok.*;
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/**
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* @author Rajesh_Kawali
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*/
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@ToString(includeFieldNames = false) // includeFieldNames = false --> field name will not add while printing the object
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@EqualsAndHashCode
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@Getter

‎src/main/java/com/rajeshkawali/lombok/ImmutableClass.java

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import lombok.Value;
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/**
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* @author Rajesh_Kawali
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*/
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/*
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@Value annotation -->is shorthand for the annotation combination of
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@Getter

‎src/main/java/com/rajeshkawali/lombok/LombokCleanup.java

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import java.io.*;
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/**
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* @author Rajesh_Kawali
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*/
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public class LombokCleanup {
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public static void main(String[] args) throws IOException {
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‎src/main/java/com/rajeshkawali/model/EmployeeDTO.java

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package com.rajeshkawali.model;
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import com.fasterxml.jackson.annotation.JsonFormat;
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import com.rajeshkawali.validation.GenderEitherOneOf;
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import com.rajeshkawali.validation.ValidateNationality;
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import jakarta.validation.constraints.*;
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import lombok.AllArgsConstructor;
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import lombok.Data;
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import lombok.NoArgsConstructor;
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import java.util.Date;
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/**
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* @author Rajesh_Kawali
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*/
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@Data
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@AllArgsConstructor
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@NoArgsConstructor
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public class EmployeeDTO {
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private Long id;
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@NotBlank(message = "First Name shouldn't be null or empty")
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private String firstName;
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@NotBlank(message = "Last Name shouldn't be null or empty")
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private String lastName;
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@PastOrPresent(message = "DOJ should be in the past or the past including the present")
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@JsonFormat(pattern = "dd-MM-yyyy")
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private Date doj;
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@NotNull(message = "Department shouldn't be null")
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@NotEmpty(message = "Department shouldn't be empty")
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private String dept;
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@Email(message = "Invalid email")
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private String email;
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@Pattern(regexp = "^\\d{10}$",message = "Invalid mobile number")
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private String mobile;
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//custom annotation
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@GenderEitherOneOf({"male", "female"})
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private String gender; // male or female
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@Min(value = 18, message = "Age should not be less than 18")
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@Max(value = 60, message = "Age should not be greater than 60")
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private int age;
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@Size(min = 10, max = 500, message = "About Me must be between 10 and 500 characters")
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private String aboutMe;
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@ValidateNationality //custom annotation
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private String nationality; //Indian or American or Canadian or British or French or German or Japanese
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}
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/*
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All the annotations are standard JSR annotations:
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@NotNull :--> validates that the annotated property value is not null.
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@AssertTrue :--> validates that the annotated property value is true.
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@Size :--> validates that the annotated property value has a size between the attributes min and max; can be applied to String, Collection, Map, and array properties.
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@Min :--> validates that the annotated property has a value no smaller than the value attribute.
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@Max :--> validates that the annotated property has a value no larger than the value attribute.
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@Email :--> validates that the annotated property is a valid email address.
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@NotEmpty :--> validates that the property is not null or empty; can be applied to String, Collection, Map or Array values.
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@NotBlank :--> can be applied only to text values and validates that the property is not null or whitespace.
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@Positive and @PositiveOrZero :--> apply to numeric values and validate that they are strictly positive, or positive including 0.
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@Negative and @NegativeOrZero :--> apply to numeric values and validate that they are strictly negative, or negative including 0.
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@Past and @PastOrPresent :--> validate that a date value is in the past or the past including the present; can be applied to date types including those added in Java 8.
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@Future and @FutureOrPresent :--> validate that a date value is in the future, or in the future including the present.
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*/

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