Add API consumer project

account-service-consumer/pom.xml

@@ -0,0 +1,94 @@
+<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.springframework.boot</groupId>
+    <artifactId>spring-boot-starter-parent</artifactId>
+    <version>3.3.0</version>
+    <relativePath/> <!-- lookup parent from repository -->
+  </parent>
+  <groupId>de.sample.schulung.spring</groupId>
+  <artifactId>account-service-consumer</artifactId>
+  <version>0.0.1-SNAPSHOT</version>
+  <name>Account Service Consumer</name>
+  <properties>
+    <java.version>17</java.version>
+    <mapstruct.version>1.5.5.Final</mapstruct.version>
+    <lombok-mapstruct-binding.version>0.2.0</lombok-mapstruct-binding.version>
+  </properties>
+  <dependencies>
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter-webflux</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter-validation</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-devtools</artifactId>
+      <scope>runtime</scope>
+      <optional>true</optional>
+    </dependency>
+    <dependency>
+      <groupId>org.projectlombok</groupId>
+      <artifactId>lombok</artifactId>
+      <optional>true</optional>
+    </dependency>
+    <dependency>
+      <groupId>org.mapstruct</groupId>
+      <artifactId>mapstruct</artifactId>
+      <version>${mapstruct.version}</version>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <pluginManagement>
+      <plugins>
+        <plugin>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <configuration>
+            <annotationProcessorPaths>
+              <path>
+                <groupId>org.projectlombok</groupId>
+                <artifactId>lombok</artifactId>
+                <version>${lombok.version}</version>
+              </path>
+              <path>
+                <groupId>org.mapstruct</groupId>
+                <artifactId>mapstruct-processor</artifactId>
+                <version>${mapstruct.version}</version>
+              </path>
+              <path>
+                <groupId>org.projectlombok</groupId>
+                <artifactId>lombok-mapstruct-binding</artifactId>
+                <version>${lombok-mapstruct-binding.version}</version>
+              </path>
+            </annotationProcessorPaths>
+          </configuration>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+    <plugins>
+      <plugin>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-maven-plugin</artifactId>
+        <configuration>
+          <excludes>
+            <exclude>
+              <groupId>org.projectlombok</groupId>
+              <artifactId>lombok</artifactId>
+            </exclude>
+            <exclude>
+              <groupId>org.mapstruct</groupId>
+              <artifactId>mapstruct</artifactId>
+            </exclude>
+          </excludes>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>

account-service-consumer/src/main/java/de/sample/schulung/accounts/consumer/AccountServiceConsumerApplication.java

@@ -0,0 +1,13 @@
+package de.sample.schulung.accounts.consumer;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class AccountServiceConsumerApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(AccountServiceConsumerApplication.class, args);
+	}
+
+}

account-service-consumer/src/main/java/de/sample/schulung/accounts/consumer/boundary/CustomersController.java

@@ -0,0 +1,32 @@
+package de.sample.schulung.accounts.consumer.boundary;
+
+import de.sample.schulung.accounts.consumer.domain.client.CustomerDto;
+import de.sample.schulung.accounts.consumer.domain.CustomersService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+import reactor.core.publisher.Flux;
+
+@Controller
+@RequestMapping("/customer-names")
+@RequiredArgsConstructor
+public class CustomersController {
+
+  private final CustomersService service;
+
+  @GetMapping(
+    produces = MediaType.TEXT_PLAIN_VALUE
+  )
+  @ResponseBody
+  public Flux<String> getCustomerNames() {
+    return service
+      .findAll()
+      .map(CustomerDto::getName);
+  }
+
+
+
+}

account-service-consumer/src/main/java/de/sample/schulung/accounts/consumer/domain/CustomersService.java

@@ -0,0 +1,19 @@
+package de.sample.schulung.accounts.consumer.domain;
+
+import de.sample.schulung.accounts.consumer.domain.client.CustomerDto;
+import de.sample.schulung.accounts.consumer.domain.client.CustomersApi;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+
+@Service
+@RequiredArgsConstructor
+public class CustomersService {
+
+  private final CustomersApi remoteApi;
+
+  public Flux<CustomerDto> findAll() {
+    return remoteApi.readAllCustomers();
+  }
+
+}

account-service-consumer/src/main/java/de/sample/schulung/accounts/consumer/domain/client/CustomerDto.java

@@ -0,0 +1,27 @@
+package de.sample.schulung.accounts.consumer.domain.client;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import jakarta.validation.constraints.Size;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.time.LocalDate;
+import java.util.UUID;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class CustomerDto {
+
+  @JsonProperty(access = JsonProperty.Access.READ_ONLY)
+  private UUID uuid;
+  @Size(min = 3, max = 100)
+  private String name;
+  @JsonProperty("birthdate")
+  private LocalDate dateOfBirth;
+  private String state;
+
+}

account-service-consumer/src/main/java/de/sample/schulung/accounts/consumer/domain/client/CustomersApi.java

@@ -0,0 +1,13 @@
+package de.sample.schulung.accounts.consumer.domain.client;
+
+import org.springframework.web.service.annotation.GetExchange;
+import org.springframework.web.service.annotation.HttpExchange;
+import reactor.core.publisher.Flux;
+
+@HttpExchange("/customers")
+public interface CustomersApi {
+
+  @GetExchange
+  Flux<CustomerDto> readAllCustomers();
+
+}

account-service-consumer/src/main/java/de/sample/schulung/accounts/consumer/domain/client/CustomersApiConfiguration.java

@@ -0,0 +1,37 @@
+package de.sample.schulung.accounts.consumer.domain.client;
+
+import io.netty.channel.ChannelOption;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.client.reactive.ReactorClientHttpConnector;
+import org.springframework.web.reactive.function.client.WebClient;
+import org.springframework.web.reactive.function.client.support.WebClientAdapter;
+import org.springframework.web.service.invoker.HttpServiceProxyFactory;
+import reactor.netty.http.client.HttpClient;
+
+import java.time.Duration;
+
+@Configuration
+public class CustomersApiConfiguration {
+
+  @Bean
+  CustomersApi customersApi() {
+    var httpClient = HttpClient.create()
+      .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 100)
+      .responseTimeout(Duration.ofMillis(1000));
+    var webClient = WebClient
+      .builder()
+      .baseUrl("http://localhost:8080/api/v1")
+      .clientConnector(new ReactorClientHttpConnector(httpClient))
+      .build();
+    var adapter = WebClientAdapter
+      .create(webClient);
+    HttpServiceProxyFactory factory = HttpServiceProxyFactory
+      .builderFor(adapter)
+      .build();
+
+    return factory
+      .createClient(CustomersApi.class);
+  }
+
+}

account-service-consumer/src/main/resources/application.yml

@@ -0,0 +1,2 @@
+server:
+  port: 8081

pom.xml

@@ -10,6 +10,7 @@
 
   <modules>
     <module>account-service-provider</module>
+    <module>account-service-consumer</module>
   </modules>
 
 </project>