Apply RSocket transport configuration on server

Fixes gh-17845

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/rsocket/RSocketProperties.java

@@ -19,6 +19,7 @@ package org.springframework.boot.autoconfigure.rsocket;
 import java.net.InetAddress;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.rsocket.server.RSocketServer;
 
 /**
  * {@link ConfigurationProperties properties} for RSocket support.
@@ -50,7 +51,7 @@ public class RSocketProperties {
 		/**
 		 * RSocket transport protocol.
 		 */
-		private Transport transport = Transport.TCP;
+		private RSocketServer.TRANSPORT transport = RSocketServer.TRANSPORT.TCP;
 
 		/**
 		 * Path under which RSocket handles requests (only works with websocket
@@ -74,11 +75,11 @@ public class RSocketProperties {
 			this.address = address;
 		}
 
-		public Transport getTransport() {
+		public RSocketServer.TRANSPORT getTransport() {
 			return this.transport;
 		}
 
-		public void setTransport(Transport transport) {
+		public void setTransport(RSocketServer.TRANSPORT transport) {
 			this.transport = transport;
 		}
 
@@ -90,12 +91,6 @@ public class RSocketProperties {
 			this.mappingPath = mappingPath;
 		}
 
-		public enum Transport {
-
-			TCP, WEBSOCKET
-
-		}
-
 	}
 
 }

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/rsocket/RSocketServerAutoConfiguration.java

@@ -92,6 +92,7 @@ public class RSocketServerAutoConfiguration {
 				ObjectProvider<ServerRSocketFactoryCustomizer> customizers) {
 			NettyRSocketServerFactory factory = new NettyRSocketServerFactory();
 			factory.setResourceFactory(resourceFactory);
+			factory.setTransport(properties.getServer().getTransport());
 			PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
 			map.from(properties.getServer().getAddress()).to(factory::setAddress);
 			map.from(properties.getServer().getPort()).to(factory::setPort);