next lec

khushwinder · khushwinder · commit 92c9217afc2b · 2022-07-07T22:01:12.000-04:00
diff --git a/src/main/java/com/liveitcourses/firstproject/MainApplication.java b/src/main/java/com/liveitcourses/firstproject/MainApplication.java
@@ -1,4 +1,4 @@
-package com.liveitcourses.firstproject.controller;
+package com.liveitcourses.firstproject;
 
 import lombok.extern.log4j.Log4j2;
 import org.springframework.boot.SpringApplication;
diff --git a/src/main/java/com/liveitcourses/firstproject/controller/HelloWorldBean.java b/src/main/java/com/liveitcourses/firstproject/controller/HelloWorldBean.java
@@ -1,5 +1,11 @@
 package com.liveitcourses.firstproject.controller;
 
+// model classes
+// pojo plain old java objects
+// DTO data transfer objects
+// domain object
+// Entities
+// DAO
 public class HelloWorldBean{
 
 private String message;
diff --git a/src/main/java/com/liveitcourses/firstproject/controller/UserController.java b/src/main/java/com/liveitcourses/firstproject/controller/UserController.java
@@ -3,11 +3,10 @@
 import java.util.List;
 
 import com.liveitcourses.firstproject.dto.User;
+import com.liveitcourses.firstproject.exception.UserNotFoundException;
 import com.liveitcourses.firstproject.service.UserDaoService;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PathVariable;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 @RestController
 public class UserController{
@@ -25,4 +24,19 @@ public User retrieveUser(@PathVariable int id){
 return service.findOne(id);
 }
 
+ // input - details of user
+ // output - CREATED & Return the created URI
+ @PostMapping("/users")
+ public void createUser(@RequestBody User user){
+ User savedUser = service.save(user);
+ }
+
+ @DeleteMapping("/users/{id}")
+ public void deleteUser(@PathVariable int id){
+ User user = service.deleteById(id);
+
+ if(user==null)
+ throw new UserNotFoundException("id-"+ id);
+ }
+
 }
diff --git a/src/main/java/com/liveitcourses/firstproject/dto/User.java b/src/main/java/com/liveitcourses/firstproject/dto/User.java
@@ -1,5 +1,7 @@
 package com.liveitcourses.firstproject.dto;
 
+import org.springframework.context.annotation.Bean;
+
 import java.util.Date;
 
 public class User{
diff --git a/src/main/java/com/liveitcourses/firstproject/exception/CustomizedResponseEntityExceptionHandler.java b/src/main/java/com/liveitcourses/firstproject/exception/CustomizedResponseEntityExceptionHandler.java
@@ -0,0 +1,32 @@
+package com.liveitcourses.firstproject.exception;
+
+import java.util.Date;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.context.request.WebRequest;
+import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;
+
+
+@ControllerAdvice
+@RestController
+public class CustomizedResponseEntityExceptionHandler extends ResponseEntityExceptionHandler{
+
+ @ExceptionHandler(Exception.class)
+ public final ResponseEntity<Object> handleAllExceptions(Exception ex, WebRequest request){
+ ExceptionResponse exceptionResponse = new ExceptionResponse(new Date(), ex.getMessage(),
+ request.getDescription(false));
+ return new ResponseEntity(exceptionResponse, HttpStatus.INTERNAL_SERVER_ERROR);
+ }
+
+ @ExceptionHandler(UserNotFoundException.class)
+ public final ResponseEntity<Object> handleUserNotFoundException(UserNotFoundException ex, WebRequest request){
+ ExceptionResponse exceptionResponse = new ExceptionResponse(new Date(), ex.getMessage(),
+ request.getDescription(false));
+ return new ResponseEntity(exceptionResponse, HttpStatus.NOT_FOUND);
+ }
+
+}
diff --git a/src/main/java/com/liveitcourses/firstproject/exception/ExceptionResponse.java b/src/main/java/com/liveitcourses/firstproject/exception/ExceptionResponse.java
@@ -0,0 +1,29 @@
+package com.liveitcourses.firstproject.exception;
+
+import java.util.Date;
+
+public class ExceptionResponse{
+ private Date timestamp;
+ private String message;
+ private String details;
+
+ public ExceptionResponse(Date timestamp, String message, String details){
+ super();
+ this.timestamp = timestamp;
+ this.message = message;
+ this.details = details;
+ }
+
+ public Date getTimestamp(){
+ return timestamp;
+ }
+
+ public String getMessage(){
+ return message;
+ }
+
+ public String getDetails(){
+ return details;
+ }
+
+}
diff --git a/src/main/java/com/liveitcourses/firstproject/exception/UserNotFoundException.java b/src/main/java/com/liveitcourses/firstproject/exception/UserNotFoundException.java
@@ -0,0 +1,11 @@
+package com.liveitcourses.firstproject.exception;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.NOT_FOUND)
+public class UserNotFoundException extends RuntimeException{
+ public UserNotFoundException(String message){
+ super(message);
+ }
+}
diff --git a/src/main/java/com/liveitcourses/firstproject/service/PostService.java b/src/main/java/com/liveitcourses/firstproject/service/PostService.java
@@ -0,0 +1,18 @@
+package com.liveitcourses.firstproject.service;
+
+import org.springframework.stereotype.Component;
+import org.springframework.stereotype.Service;
+
+@Service
+public class PostService{
+
+
+ //get method
+
+ // inserting record
+
+ // deletion
+
+ // updating
+
+}
diff --git a/src/main/java/com/liveitcourses/firstproject/service/UserDaoService.java b/src/main/java/com/liveitcourses/firstproject/service/UserDaoService.java
@@ -2,6 +2,7 @@
 
 import java.util.ArrayList;
 import java.util.Date;
+import java.util.Iterator;
 import java.util.List;
 
 import com.liveitcourses.firstproject.dto.User;
@@ -41,4 +42,16 @@ public User findOne(int id){
 return null;
 }
 
+ public User deleteById(int id){
+ Iterator<User> iterator = users.iterator();
+ while (iterator.hasNext()){
+ User user = iterator.next();
+ if (user.getId() == id){
+ iterator.remove();
+ return user;
+ }
+ }
+ return null;
+ }
+
 }
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
@@ -1,4 +1,4 @@
-#logging.level.org.springframework = debug
+logging.level.org.springframework = debug
 
-logging.level.org.springframework = info
+#logging.level.org.springframework = info
 spring.messages.basename=messages

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-packagecom.liveitcourses.firstproject.controller;`
	`1`	`+packagecom.liveitcourses.firstproject;`
`2`	`2`
`3`	`3`	`importlombok.extern.log4j.Log4j2;`
`4`	`4`	`importorg.springframework.boot.SpringApplication;`
-Original file line number
+Diff line change
@@ @@ -1,5 +1,11 @@ @@
 packagecom.liveitcourses.firstproject.controller;
 +// model classes
 +// pojo plain old java objects
 +// DTO data transfer objects
 +// domain object
 +// Entities
 +// DAO
 publicclassHelloWorldBean{
 privateStringmessage;
-Original file line number
+Diff line change
 importjava.util.List;
 importcom.liveitcourses.firstproject.dto.User;
 +importcom.liveitcourses.firstproject.exception.UserNotFoundException;
 importcom.liveitcourses.firstproject.service.UserDaoService;
 importorg.springframework.beans.factory.annotation.Autowired;
 -importorg.springframework.web.bind.annotation.GetMapping;
 -importorg.springframework.web.bind.annotation.PathVariable;
 -importorg.springframework.web.bind.annotation.RestController;
 +importorg.springframework.web.bind.annotation.*;
 @RestController
 publicclassUserController{
 returnservice.findOne(id);
+ }
 +// input - details of user
 +// output - CREATED & Return the created URI
 +@PostMapping("/users")
 +publicvoidcreateUser(@RequestBodyUseruser){
 +UsersavedUser = service.save(user);
 + }
++
 +@DeleteMapping("/users/{id}")
 +publicvoiddeleteUser(@PathVariableintid){
 +Useruser = service.deleteById(id);
++
 +if(user==null)
 +thrownewUserNotFoundException("id-"+ id);
 + }
++
+}
-Original file line number
+Diff line change
@@ @@ -1,5 +1,7 @@ @@
 packagecom.liveitcourses.firstproject.dto;
 +importorg.springframework.context.annotation.Bean;
++
 importjava.util.Date;
 publicclassUser{
-Original file line number
+Diff line change
@@ @@ -0,0 +1,32 @@ @@
 +packagecom.liveitcourses.firstproject.exception;
++
 +importjava.util.Date;
++
 +importorg.springframework.http.HttpStatus;
 +importorg.springframework.http.ResponseEntity;
 +importorg.springframework.web.bind.annotation.ControllerAdvice;
 +importorg.springframework.web.bind.annotation.ExceptionHandler;
 +importorg.springframework.web.bind.annotation.RestController;
 +importorg.springframework.web.context.request.WebRequest;
 +importorg.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;
++
++
 +@ControllerAdvice
 +@RestController
 +publicclassCustomizedResponseEntityExceptionHandlerextendsResponseEntityExceptionHandler{
++
 +@ExceptionHandler(Exception.class)
 +publicfinalResponseEntity<Object> handleAllExceptions(Exceptionex, WebRequestrequest){
 +ExceptionResponseexceptionResponse = newExceptionResponse(newDate(), ex.getMessage(),
 +request.getDescription(false));
 +returnnewResponseEntity(exceptionResponse, HttpStatus.INTERNAL_SERVER_ERROR);
 + }
++
 +@ExceptionHandler(UserNotFoundException.class)
 +publicfinalResponseEntity<Object> handleUserNotFoundException(UserNotFoundExceptionex, WebRequestrequest){
 +ExceptionResponseexceptionResponse = newExceptionResponse(newDate(), ex.getMessage(),
 +request.getDescription(false));
 +returnnewResponseEntity(exceptionResponse, HttpStatus.NOT_FOUND);
 + }
++
 +}
-Original file line number
+Diff line change
@@ @@ -0,0 +1,29 @@ @@
 +packagecom.liveitcourses.firstproject.exception;
++
 +importjava.util.Date;
++
 +publicclassExceptionResponse{
 +privateDatetimestamp;
 +privateStringmessage;
 +privateStringdetails;
++
 +publicExceptionResponse(Datetimestamp, Stringmessage, Stringdetails){
 +super();
 +this.timestamp = timestamp;
 +this.message = message;
 +this.details = details;
 + }
++
 +publicDategetTimestamp(){
 +returntimestamp;
 + }
++
 +publicStringgetMessage(){
 +returnmessage;
 + }
++
 +publicStringgetDetails(){
 +returndetails;
 + }
++
 +}