rearranged packages to include service and secondservice into gateway customfilters package, as they belong to that article

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/gatewayapp/CustomFiltersGatewayApplication.java

@@ -1,4 +1,4 @@
-package com.baeldung.springcloudgateway.customfilters;
+package com.baeldung.springcloudgateway.customfilters.gatewayapp;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/gatewayapp/config/WebClientConfig.java

@@ -1,4 +1,4 @@
-package com.baeldung.springcloudgateway.customfilters.config;
+package com.baeldung.springcloudgateway.customfilters.gatewayapp.config;
 
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/gatewayapp/filters/factories/ChainRequestGatewayFilterFactory.java

@@ -1,4 +1,4 @@
-package com.baeldung.springcloudgateway.customfilters.filters.factories;
+package com.baeldung.springcloudgateway.customfilters.gatewayapp.filters.factories;
 
 import java.util.Arrays;
 import java.util.List;

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/gatewayapp/filters/factories/LoggingGatewayFilterFactory.java

@@ -1,4 +1,4 @@
-package com.baeldung.springcloudgateway.customfilters.filters.factories;
+package com.baeldung.springcloudgateway.customfilters.gatewayapp.filters.factories;
 
 import java.util.Arrays;
 import java.util.List;

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/gatewayapp/filters/factories/ModifyRequestGatewayFilterFactory.java

@@ -1,4 +1,4 @@
-package com.baeldung.springcloudgateway.customfilters.filters.factories;
+package com.baeldung.springcloudgateway.customfilters.gatewayapp.filters.factories;
 
 import java.util.Arrays;
 import java.util.Collections;

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/gatewayapp/filters/factories/ModifyResponseGatewayFilterFactory.java

@@ -1,4 +1,4 @@
-package com.baeldung.springcloudgateway.customfilters.filters.factories;
+package com.baeldung.springcloudgateway.customfilters.gatewayapp.filters.factories;
 
 import java.util.Optional;
 

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/gatewayapp/filters/global/FirstPreLastPostGlobalFilter.java

@@ -1,4 +1,4 @@
-package com.baeldung.springcloudgateway.customfilters.filters.global;
+package com.baeldung.springcloudgateway.customfilters.gatewayapp.filters.global;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/gatewayapp/filters/global/LoggingGlobalFiltersConfigurations.java

@@ -1,4 +1,4 @@
-package com.baeldung.springcloudgateway.customfilters.filters.global;
+package com.baeldung.springcloudgateway.customfilters.gatewayapp.filters.global;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/gatewayapp/filters/global/LoggingGlobalPreFilter.java

@@ -1,4 +1,4 @@
-package com.baeldung.springcloudgateway.customfilters.filters.global;
+package com.baeldung.springcloudgateway.customfilters.gatewayapp.filters.global;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/gatewayapp/routes/ServiceRouteConfiguration.java

@@ -1,11 +1,11 @@
-package com.baeldung.springcloudgateway.customfilters.routes;
+package com.baeldung.springcloudgateway.customfilters.gatewayapp.routes;
 
 import org.springframework.cloud.gateway.route.RouteLocator;
 import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
 import org.springframework.context.annotation.Bean;
 
-import com.baeldung.springcloudgateway.customfilters.filters.factories.LoggingGatewayFilterFactory;
-import com.baeldung.springcloudgateway.customfilters.filters.factories.LoggingGatewayFilterFactory.Config;
+import com.baeldung.springcloudgateway.customfilters.gatewayapp.filters.factories.LoggingGatewayFilterFactory;
+import com.baeldung.springcloudgateway.customfilters.gatewayapp.filters.factories.LoggingGatewayFilterFactory.Config;
 
 /**
  * Note: We want to keep this as an example of configuring a Route with a custom filter

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/secondservice/SecondServiceApplication.java

@@ -0,0 +1,15 @@
+package com.baeldung.springcloudgateway.customfilters.secondservice;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.PropertySource;
+
+@SpringBootApplication
+@PropertySource("classpath:secondservice-application.properties")
+public class SecondServiceApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SecondServiceApplication.class, args);
+    }
+
+}

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/secondservice/web/SecondServiceRestController.java

@@ -0,0 +1,18 @@
+package com.baeldung.springcloudgateway.customfilters.secondservice.web;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import reactor.core.publisher.Mono;
+
+@RestController
+public class SecondServiceRestController {
+
+    @GetMapping("/resource/language")
+    public Mono<ResponseEntity<String>> getResource() {
+        return Mono.just(ResponseEntity.ok()
+            .body("es"));
+
+    }
+}

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/service/ServiceApplication.java

@@ -0,0 +1,15 @@
+package com.baeldung.springcloudgateway.customfilters.service;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.PropertySource;
+
+@SpringBootApplication
+@PropertySource("classpath:service-application.properties")
+public class ServiceApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ServiceApplication.class, args);
+    }
+
+}

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/customfilters/service/web/ServiceRestController.java

@@ -0,0 +1,22 @@
+package com.baeldung.springcloudgateway.customfilters.service.web;
+
+import java.util.Locale;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import reactor.core.publisher.Mono;
+
+@RestController
+public class ServiceRestController {
+
+    @GetMapping("/resource")
+    public Mono<ResponseEntity<String>> getResource() {
+        return Mono.just(ResponseEntity.ok()
+            .header(HttpHeaders.CONTENT_LANGUAGE, Locale.ENGLISH.getLanguage())
+            .body("Service Resource"));
+
+    }
+}