HTTP PUT vs HTTP PATCH in a REST API.

Spring-Boot/rest-example/.gitignore

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+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/build/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/

Spring-Boot/rest-example/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.javadevjournal</groupId>
+    <artifactId>rest-example</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>rest-example</name>
+    <description>Demo project for Spring Boot</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.0.3.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+
+</project>

Spring-Boot/rest-example/src/main/java/com/javadevjournal/restexample/AppConfig.java

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+package com.javadevjournal.restexample;
+
+import com.javadevjournal.restexample.data.Customer;
+import com.javadevjournal.restexample.jpa.CustomerRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import javax.annotation.PostConstruct;
+import java.util.List;
+
+@Component
+public class AppConfig {
+
+    @Autowired
+    private CustomerRepository customerRepository;
+
+    @PostConstruct
+    public void init(){
+
+        customerRepository.save(new Customer("Shekher", "Kumar","abc@email.com"));
+        customerRepository.save(new Customer("Robert", "Hickle","abc1@email.com"));
+        customerRepository.save(new Customer("David", "Palmer","abc3@email.com"));
+        customerRepository.save(new Customer("Michelle", "Dessler", "abc@email.com"));
+
+        Iterable<Customer> custmomer = customerRepository.findAll();
+        System.out.println("*******************************");
+        custmomer.forEach((Customer cust)->{
+            System.out.println(cust.getId());
+        });
+
+
+    }
+}

Spring-Boot/rest-example/src/main/java/com/javadevjournal/restexample/RestExampleApplication.java

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+package com.javadevjournal.restexample;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class RestExampleApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(RestExampleApplication.class, args);
+    }
+}

Spring-Boot/rest-example/src/main/java/com/javadevjournal/restexample/controller/RESTController.java

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+package com.javadevjournal.restexample.controller;
+
+import com.javadevjournal.restexample.data.Customer;
+import com.javadevjournal.restexample.jpa.CustomerRepository;
+import com.javadevjournal.restexample.service.CustomerService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+public class RESTController {
+
+    @Autowired
+    private CustomerService customerService;
+
+    @PutMapping("/customers/{id}")
+    public ResponseEntity<?> saveResource(@RequestBody Customer customer,
+                                          @PathVariable("id") String id) {
+        Customer newCustomer = customerService.saveCustomer(customer,id);
+        return new ResponseEntity<>(newCustomer,HttpStatus.OK);
+    }
+
+    @PatchMapping("/customers/{id}")
+    public ResponseEntity<?> updateResource(@RequestParam("email") String email, @PathVariable("id") String id){
+        Customer newCustomer = customerService.updateCustomer(email,id);
+        return new ResponseEntity<>(newCustomer,HttpStatus.OK);
+    }
+}

Spring-Boot/rest-example/src/main/java/com/javadevjournal/restexample/data/Customer.java

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+package com.javadevjournal.restexample.data;
+
+import javax.persistence.*;
+
+@Entity
+@Table(name = "customer")
+public class Customer {
+
+    @Id
+    @GeneratedValue(strategy=GenerationType.AUTO)
+    private Long id;
+    private String firstName;
+    private String lastName;
+    private String email;
+
+    public Customer() {
+    }
+
+    public Customer(String firstName, String lastName, String email) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.email = email;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long 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;
+    }
+}

Spring-Boot/rest-example/src/main/java/com/javadevjournal/restexample/jpa/CustomerRepository.java

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+package com.javadevjournal.restexample.jpa;
+
+import com.javadevjournal.restexample.data.Customer;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.repository.CrudRepository;
+
+public interface CustomerRepository extends CrudRepository<Customer,Long> {
+}

Spring-Boot/rest-example/src/main/java/com/javadevjournal/restexample/service/CustomerService.java

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+package com.javadevjournal.restexample.service;
+
+import com.javadevjournal.restexample.data.Customer;
+
+public interface CustomerService {
+
+    public Customer saveCustomer(Customer customer, String id);
+    public Customer updateCustomer(String email, String id);
+}

Spring-Boot/rest-example/src/main/java/com/javadevjournal/restexample/service/DefaultCustomerService.java

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+package com.javadevjournal.restexample.service;
+
+import com.javadevjournal.restexample.data.Customer;
+import com.javadevjournal.restexample.jpa.CustomerRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.Optional;
+
+@Service
+public class DefaultCustomerService implements CustomerService {
+
+    @Autowired
+    CustomerRepository customerRepository;
+
+    @Override
+    public Customer saveCustomer(Customer customer, String id) {
+
+        Optional<Customer> originalCustomer = customerRepository.findById(Long.valueOf(id));
+        return customerRepository.save(customer);
+    }
+
+    @Override
+    public Customer updateCustomer(String email, String id) {
+        Optional<Customer> originalCustomer = customerRepository.findById(Long.valueOf(id));
+        Customer customer = originalCustomer.get();
+        customer.setEmail(email);
+        return customerRepository.save(customer);
+    }
+}

Spring-Boot/rest-example/src/test/java/com/javadevjournal/restexample/RestExampleApplicationTests.java

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+package com.javadevjournal.restexample;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class RestExampleApplicationTests {
+
+    @Test
+    public void contextLoads() {
+    }
+
+}