initial setup

src/main/java/com/litoralregas/backend_gateway/BackendGatewayApplication.java

@@ -0,0 +1,13 @@
+package com.litoralregas.backend_gateway;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class BackendGatewayApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(BackendGatewayApplication.class, args);
+	}
+
+}

src/main/java/com/litoralregas/backend_gateway/client/ClientEntity.java

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+package com.litoralregas.backend_gateway.client;
+
+public class ClientEntity {
+}

src/main/java/com/litoralregas/backend_gateway/client/ClientRepository.java

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+package com.litoralregas.backend_gateway.client;
+
+public class ClientRepository {
+}

src/main/java/com/litoralregas/backend_gateway/config/SecurityConfig.java

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+package com.litoralregas.backend_gateway.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.web.SecurityFilterChain;
+
+@Configuration
+public class SecurityConfig {
+
+    @Bean
+    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
+        return http
+                .csrf(csrf -> csrf.disable())
+                .authorizeHttpRequests(auth -> auth
+                        .anyRequest().permitAll()
+                )
+                .build();
+    }
+}

src/main/java/com/litoralregas/backend_gateway/config/WebClientConfig.java

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+package com.litoralregas.backend_gateway.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.reactive.function.client.WebClient;
+
+@Configuration
+public class WebClientConfig {
+
+    @Bean
+    public WebClient webClient(WebClient.Builder builder) {
+        return builder.build();
+    }
+}

src/main/java/com/litoralregas/backend_gateway/gateway/BackendProxyService.java

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+package com.litoralregas.backend_gateway.gateway;
+
+import jakarta.servlet.http.HttpServletRequest;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Service;
+import org.springframework.web.reactive.function.client.WebClient;
+
+@Service
+public class BackendProxyService {
+
+    private final WebClient webClient;
+    private final String devBackendUrl;
+
+    public BackendProxyService(
+            WebClient webClient,
+            @Value("${gateway.dev-backend-url}") String devBackendUrl
+    ) {
+        this.webClient = webClient;
+        this.devBackendUrl = devBackendUrl;
+    }
+
+    public String getHealth() {
+        return webClient.get()
+                .uri(devBackendUrl + "/actuator/health")
+                .retrieve()
+                .bodyToMono(String.class)
+                .block();
+    }
+
+    public ResponseEntity<String> proxy(HttpServletRequest request, String body) {
+        String path = request.getRequestURI().replaceFirst("/api/backend", "");
+        String query = request.getQueryString();
+
+        String targetUrl = devBackendUrl + path + (query != null ? "?" + query : "");
+
+        String response = webClient
+                .method(HttpMethod.valueOf(request.getMethod()))
+                .uri(targetUrl)
+                .bodyValue(body != null ? body : "")
+                .retrieve()
+                .bodyToMono(String.class)
+                .block();
+
+        return ResponseEntity.ok(response);
+    }
+}

src/main/java/com/litoralregas/backend_gateway/gateway/GatewayController.java

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+package com.litoralregas.backend_gateway.gateway;
+
+import jakarta.servlet.http.HttpServletRequest;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class GatewayController {
+
+    private final BackendProxyService backendProxyService;
+
+    public GatewayController(BackendProxyService backendProxyService) {
+        this.backendProxyService = backendProxyService;
+    }
+
+    @GetMapping("/gateway/health")
+    public String backendHealth() {
+        return backendProxyService.getHealth();
+    }
+
+    @RequestMapping("/api/backend/**")
+    public ResponseEntity<String> proxy(
+            HttpServletRequest request,
+            @RequestBody(required = false) String body
+    ) {
+        return backendProxyService.proxy(request, body);
+    }
+}

src/main/java/com/litoralregas/backend_gateway/user/UserEntity.java

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+package com.litoralregas.backend_gateway.user;
+
+public class UserEntity {
+}

src/main/java/com/litoralregas/backend_gateway/user/UserRepository.java

@@ -0,0 +1,4 @@
+package com.litoralregas.backend_gateway.user;
+
+public class UserRepository {
+}

src/main/resources/application.yaml

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+server:
+  port: 18080
+
+spring:
+  application:
+    name: backend-gateway
+
+gateway:
+  dev-backend-url: http://10.100.1.2:18450

src/test/java/com/litoralregas/backend_gateway/BackendGatewayApplicationTests.java

@@ -0,0 +1,13 @@
+package com.litoralregas.backend_gateway;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class BackendGatewayApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}