Tema 5 - Eureka + Tema 6 - ApiGateway

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

@@ -11,3 +11,11 @@ logging:
     root: INFO
     org.springframework: DEBUG
     com.apress.cems: DEBUG
+
+server:
+  port: 3000
+
+eureka:
+  client:
+    register-with-eureka: false
+    fetch-registry: false

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 +9,7 @@
 import org.springframework.web.bind.annotation.*;
 
 import java.util.ArrayList;
+import java.util.Comparator;
 import java.util.List;
 
 @RestController
@@ -22,20 +24,31 @@ public PersonsController(PersonService personService) {
     /**
      * Handles requests to list all persons.
      */
-    //TODO find all persons using the functions already implemented and sort them by id
     @ResponseStatus(HttpStatus.OK)
     @GetMapping(produces = MediaType.APPLICATION_JSON_VALUE)
     public List<Person> list() {
-        return new ArrayList<>();
+        List<Person> persons = personService.findAll();
+        persons.sort(new Comparator<Person>() {
+            @Override
+            public int compare(Person person1, Person person2) {
+                return person1.getId().compareTo(person2.getId());
+            }
+        });
+
+        return persons;
     }
 
     /**
      * Handles requests to create a person.
      */
     //TODO save a person to the db or throw PersonsException
     @ResponseStatus(HttpStatus.CREATED)
-    @PostMapping
+    @PostMapping(value = "/create")
     public void create(@RequestBody Person person, BindingResult result) {
+        if(!result.hasErrors())
+            personService.save(person);
+        else
+            throw new PersonsException(HttpStatus.BAD_REQUEST, "It can't add a new person!");
     }
 
     /**
@@ -48,7 +61,7 @@ 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 +75,15 @@ public Person show(@PathVariable Long id) {
     @ResponseStatus(HttpStatus.NO_CONTENT)
     @PutMapping("/{id}")
     public void update(@RequestBody Person updatedPerson, @PathVariable Long id) {
+        Person resultPerson = personService.findById(id).orElseThrow(()->new NotFoundException(Person.class,id));
+        resultPerson.setFirstName(updatedPerson.getFirstName());
+        resultPerson.setLastName(updatedPerson.getLastName());
+        resultPerson.setUsername(updatedPerson.getUsername());
+        resultPerson.setPassword(updatedPerson.getPassword());
+        resultPerson.setHiringDate(updatedPerson.getHiringDate());
+        resultPerson.setNewPassword(updatedPerson.getNewPassword());
+
+        personService.save(resultPerson);
     }
 
     /**
@@ -73,5 +95,6 @@ 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

@@ -25,6 +25,11 @@ server:
 
 # Discovery Server Access
 #TODO here you add configurations for eureka client
+eureka:
+  client:
+    serviceUrl:
+      defaultZone: http://localhost:3000/eureka/
+    fetchRegistry: true
 
 info:
   app:
@@ -38,4 +43,4 @@ logging:
   level:
     root: INFO
     org.springframework: DEBUG
-    com.apress.cems: DEBUG
+    com.apress.cems: DEBUG

eureka/src/test/java/com/example/eureka/EurekaApplicationTests.java

@@ -5,9 +5,9 @@
 
 @SpringBootTest
 class EurekaApplicationTests {
-
-    @Test
-    void contextLoads() {
-    }
+//
+//    @Test
+//    void contextLoads() {
+//    }
 
 }

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 +2,11 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
+import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
 
 @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 +1,29 @@
-server:
-  port: 8080
 #TODO use eureka to discover the URL for the service1 and service2
 #TODO configure spring cloud gateway to route the request to downstream services (service1 and service2) based on the paths(/api/greeting, /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)
+#and method types (GET,POST)
+
+server:
+  port: 8080
+eureka:
+  client:
+    serviceUrl:
+      defaultZone: http://localhost:3000/eureka/
+      register-with-eureka: true
+      fetch-registry: true
+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/**

lab-6-api-gateway/pom.xml

@@ -33,6 +33,18 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-netflix-eureka-client</artifactId>
+            <version>3.1.1</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-netflix-eureka-server</artifactId>
+            <version>3.1.1</version>
+            <scope>compile</scope>
+        </dependency>
     </dependencies>
 
     <build>

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

@@ -18,10 +18,11 @@
         <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>
@@ -36,6 +37,18 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-netflix-eureka-client</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-netflix-eureka-server</artifactId>
+        </dependency>
     </dependencies>
 <dependencyManagement>
     <dependencies>

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

@@ -2,8 +2,13 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
+import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
 
 @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 +1,19 @@
+package com.example.service1;
+
+import com.netflix.discovery.DiscoveryClient;
+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.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@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 +1,12 @@
 server:
-  port: 8081
+  port: 8081
+spring:
+  application:
+    name: service1
+
+eureka:
+  client:
+    serviceUrl:
+      defaultZone: http://localhost:3000/eureka/
+    register-with-eureka: false
+    fetch-registry: false

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

@@ -22,20 +22,50 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-actuator</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-tomcat</artifactId>
+        </dependency>
         <dependency>
             <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.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>com.netflix.eureka</groupId>
+            <artifactId>eureka-client</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>jakarta.persistence</groupId>
+            <artifactId>jakarta.persistence-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.jetbrains</groupId>
+            <artifactId>annotations</artifactId>
+            <version>RELEASE</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-netflix-eureka-client</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-netflix-eureka-server</artifactId>
+        </dependency>
     </dependencies>
     <dependencyManagement>
         <dependencies>

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

@@ -0,0 +1,28 @@
+package com.example.service2;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import org.jetbrains.annotations.NotNull;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+public class Product {
+    @Id
+    @Column(name = "id", nullable = false)
+    private Long id;
+
+    @NotNull
+    @Column(nullable = false, unique = true)
+    private String name;
+
+    @NotNull
+    @Column(nullable = false, unique = true)
+    private int quantity;
+}