Tema Api Gateway - Radu Alexandru

eureka/discovery-server/src/main/java/com/example/discovery/DiscoveryServer.java

@@ -4,10 +4,12 @@
 import org.slf4j.LoggerFactory;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
 
 import java.io.IOException;
 
 @SpringBootApplication
+@EnableEurekaServer
 public class DiscoveryServer {
 
     private static Logger logger = LoggerFactory.getLogger(DiscoveryServer.class);

eureka/discovery-server/src/main/resources/discovery-server.yml

@@ -4,6 +4,13 @@ spring:
 # Configure this Discovery Server
 #TODO here you add configurations for server
 
+server:
+  port: 3000
+eureka:
+  client:
+    registerWithEureka: false
+    fetchRegistry: false
+
 logging:
   pattern:
     console: "%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n"

eureka/persons-server/src/main/java/com/eureka/persons/PersonsController.java

@@ -1,5 +1,6 @@
 package com.eureka.persons;
 
+import com.eureka.persons.ex.NotFoundException;
 import com.eureka.persons.person.Person;
 import com.eureka.persons.services.PersonService;
 import org.springframework.http.HttpStatus;
@@ -8,6 +9,8 @@
 import org.springframework.web.bind.annotation.*;
 
 import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
 import java.util.List;
 
 @RestController
@@ -26,7 +29,17 @@ public PersonsController(PersonService personService) {
     @ResponseStatus(HttpStatus.OK)
     @GetMapping(produces = MediaType.APPLICATION_JSON_VALUE)
     public List<Person> list() {
-        return new ArrayList<>();
+        List<Person> list = personService.findAll();
+
+        //sort by id
+        list.sort(new Comparator<Person>() {
+            @Override
+            public int compare(Person o1, Person o2) {
+                return o1.getId().compareTo(o2.getId());
+            }
+        });
+
+        return list;
     }
 
     /**
@@ -36,6 +49,11 @@ public List<Person> list() {
     @ResponseStatus(HttpStatus.CREATED)
     @PostMapping
     public void create(@RequestBody Person person, BindingResult result) {
+        if(result.hasErrors()){
+            throw new PersonsException(HttpStatus.BAD_REQUEST, "Something went wrong!");
+        } else{
+            personService.save(person);
+        }
     }
 
     /**
@@ -48,7 +66,7 @@ public void create(@RequestBody Person person, BindingResult result) {
     @ResponseStatus(HttpStatus.OK)
     @GetMapping(value = "/{id}", produces = MediaType.APPLICATION_JSON_VALUE)
     public Person show(@PathVariable Long id) {
-        return new Person();
+        return personService.findById(id).orElseThrow(() -> new NotFoundException(Person.class, id));
     }
 
     /**
@@ -62,6 +80,17 @@ public Person show(@PathVariable Long id) {
     @ResponseStatus(HttpStatus.NO_CONTENT)
     @PutMapping("/{id}")
     public void update(@RequestBody Person updatedPerson, @PathVariable Long id) {
+
+        Person person = personService.findById(id).orElseThrow(() -> new NotFoundException(Person.class, id));
+
+        person.setUsername(updatedPerson.getUsername());
+        person.setFirstName(updatedPerson.getFirstName());
+        person.setLastName(updatedPerson.getLastName());
+        person.setPassword(updatedPerson.getPassword());
+        person.setHiringDate(updatedPerson.getHiringDate());
+        person.setNewPassword(updatedPerson.getNewPassword());
+
+        personService.save(person);
     }
 
     /**
@@ -73,5 +102,7 @@ public void update(@RequestBody Person updatedPerson, @PathVariable Long id) {
     @ResponseStatus(HttpStatus.NO_CONTENT)
     @DeleteMapping("/{id}")
     public void delete(@PathVariable Long id) {
+
+        personService.delete(personService.findById(id).orElseThrow(() -> new NotFoundException(Person.class, id)));
     }
 }

eureka/persons-server/src/main/java/com/eureka/persons/PersonsServer.java

@@ -5,11 +5,13 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.autoconfigure.domain.EntityScan;
+import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
 
 import java.io.IOException;
 
 @EntityScan(basePackages = "com.eureka.persons")
 @SpringBootApplication
+@EnableEurekaClient
 public class PersonsServer {
 
     private static Logger logger = LoggerFactory.getLogger(PersonsServer.class);

eureka/persons-server/src/main/resources/persons-server.yml

@@ -26,6 +26,13 @@ server:
 # Discovery Server Access
 #TODO here you add configurations for eureka client
 
+eureka:
+  client:
+    serviceUrl:
+      defaultZone: http://192.168.81.11:3000/eureka/
+      healthcheck:
+        enabled: true
+
 info:
   app:
     name: persons-server

lab-6-api-gateway/api-gateway-project/pom.xml

@@ -43,6 +43,10 @@
             <artifactId>reactor-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-netflix-eureka-server</artifactId>
+        </dependency>
     </dependencies>
     <dependencyManagement>
         <dependencies>

lab-6-api-gateway/api-gateway-project/src/main/java/com/example/apigatewayproject/ApiGatewayProjectApplication.java

@@ -2,8 +2,10 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
 
 @SpringBootApplication
+@EnableEurekaClient
 public class ApiGatewayProjectApplication {
 
 	public static void main(String[] args) {

lab-6-api-gateway/api-gateway-project/src/main/resources/application.yml

@@ -1,6 +1,34 @@
 server:
   port: 8080
+  address: 0.0.0.0
+
 #TODO use eureka to discover the URL for the service1 and service2
+
+  eureka:
+    client:
+      serviceUrl:
+        defaultZone: http://localhost:3000/eureka/
+      register-with-eureka: true
+      fetch-registry: true
+
 #TODO configure spring cloud gateway to route the request to downstream services (service1 and service2) based on the paths(/api/greeting, /product)
+
+spring:
+  application:
+    name: gateway
+  main:
+    web-application-type: reactive
+  cloud:
+    gateway:
+      routes:
+        - id: service1
+          uri: http://localhost:8081
+          predicates:
+            - Path=/api/greeting/**
+        - id: service2
+          uri: http://localhost:8082
+          predicates:
+            - Path=/product/**
+
 #TODO for greeting endpoint add a route to accept requests to /greeting but before calling service1 it must append api before the greeting path (HINT: rewrite path filter)
 #and method types (GET,POST)

lab-6-api-gateway/service1/pom.xml

@@ -18,10 +18,10 @@
         <spring-cloud.version>2021.0.1</spring-cloud.version>
     </properties>
     <dependencies>
-      <!--  <dependency>
+        <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
-        </dependency>-->
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-actuator</artifactId>
@@ -30,7 +30,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
-
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-netflix-eureka-client</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>

lab-6-api-gateway/service1/src/main/java/com/example/service1/Service1Application.java

@@ -2,8 +2,10 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
 
 @SpringBootApplication
+@EnableEurekaClient
 public class Service1Application {
 
 	public static void main(String[] args) {

lab-6-api-gateway/service1/src/main/java/com/example/service1/Service1Controller.java

@@ -0,0 +1,17 @@
+package com.example.service1;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@Controller
+@RequestMapping("/api")
+public class Service1Controller {
+
+    @GetMapping("/greeting/{name}")
+    public String greeting(@PathVariable String name){
+        System.out.println(name);
+        return "Hello "+ name;
+    }
+}

lab-6-api-gateway/service1/src/main/resources/application.yml

@@ -1,2 +1,14 @@
 server:
-  port: 8081
+  port: 8081
+  address: 0.0.0.0
+
+spring:
+  application:
+    name: service1
+
+eureka:
+  client:
+    serviceUrl:
+      defaultZone: http://localhost:3000/eureka/
+    register-with-eureka: true
+    fetch-registry: true

lab-6-api-gateway/service2/pom.xml

@@ -26,16 +26,27 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
-        <!--<dependency>
+        <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
-        </dependency>-->
-
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-netflix-eureka-client</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
     </dependencies>
     <dependencyManagement>
         <dependencies>

lab-6-api-gateway/service2/src/main/java/com/example/service2/Product.java

@@ -0,0 +1,24 @@
+package com.example.service2;
+
+import com.sun.istack.NotNull;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+public class Product {
+
+    @NotNull
+    @Column(nullable = false, unique = true)
+    private String name;
+
+    @NotNull
+    @Column(nullable = false, unique = true)
+    private int quantity;
+}

lab-6-api-gateway/service2/src/main/java/com/example/service2/Service2Application.java

@@ -2,8 +2,10 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
 
 @SpringBootApplication
+@EnableEurekaClient
 public class Service2Application {
 
 	public static void main(String[] args) {

lab-6-api-gateway/service2/src/main/java/com/example/service2/Service2Controller.java

@@ -0,0 +1,31 @@
+package com.example.service2;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.validation.BindingResult;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+@RestController
+@RequestMapping("/product")
+public class Service2Controller {
+
+    private List<Product> products = new ArrayList<Product>();
+
+    @ResponseStatus(HttpStatus.OK)
+    @PostMapping()
+    public void addProduct(@RequestBody Product product, @RequestHeader Map<String, String> headers) {
+        for(Map.Entry<String,String> header : headers.entrySet()) {
+            System.out.println(header);
+        }
+        products.add(product);
+    }
+
+    @GetMapping()
+    public List<Product> getProducts() {
+        return products;
+    }
+}

lab-6-api-gateway/service2/src/main/resources/application.yml

@@ -1,3 +1,15 @@
 
 server:
-  port: 8082
+  port: 8082
+  address: 0.0.0.0
+
+spring:
+  application:
+    name: service2
+
+eureka:
+  client:
+    serviceUrl:
+      defaultZone: http://localhost:3000/eureka/
+    register-with-eureka: true
+    fetch-registry: true