Add path-helper attribute for websocket namespace

Issue: SPR-11771

spring-websocket/src/main/java/org/springframework/web/socket/config/MessageBrokerBeanDefinitionParser.java

@@ -112,13 +112,21 @@ class MessageBrokerBeanDefinitionParser implements BeanDefinitionParser {
 		CompositeComponentDefinition compDefinition = new CompositeComponentDefinition(element.getTagName(), source);
 		context.pushContainingComponent(compDefinition);
 
+		RootBeanDefinition handlerMappingDef = new RootBeanDefinition(SimpleUrlHandlerMapping.class);
+
 		String orderAttribute = element.getAttribute("order");
 		int order = orderAttribute.isEmpty() ? DEFAULT_MAPPING_ORDER : Integer.valueOf(orderAttribute);
+		handlerMappingDef.getPropertyValues().add("order", order);
+
+		String pathHelper = element.getAttribute("path-helper");
+		if (StringUtils.hasText(pathHelper)) {
+			handlerMappingDef.getPropertyValues().add("urlPathHelper", new RuntimeBeanReference(pathHelper));
+		}
+
 		ManagedMap<String, Object> urlMap = new ManagedMap<String, Object>();
 		urlMap.setSource(source);
-		RootBeanDefinition handlerMappingDef = new RootBeanDefinition(SimpleUrlHandlerMapping.class);
-		handlerMappingDef.getPropertyValues().add("order", order);
 		handlerMappingDef.getPropertyValues().add("urlMap", urlMap);
+
 		registerBeanDef(handlerMappingDef, context, source);
 
 		Element channelElem = DomUtils.getChildElementByTagName(element, "client-inbound-channel");
@@ -172,7 +180,7 @@ class MessageBrokerBeanDefinitionParser implements BeanDefinitionParser {
 	}
 
 	private RuntimeBeanReference getMessageChannel(String name, Element element, ParserContext context, Object source) {
-		RootBeanDefinition executor = null;
+		RootBeanDefinition executor;
 		if (element == null) {
 			executor = getDefaultExecutorBeanDefinition(name);
 		}
@@ -526,7 +534,6 @@ class MessageBrokerBeanDefinitionParser implements BeanDefinitionParser {
 		context.registerComponent(new BeanComponentDefinition(beanDef, name));
 	}
 
-
 	private static class DecoratingFactoryBean implements FactoryBean<WebSocketHandler> {
 
 		private final WebSocketHandler handler;
@@ -534,6 +541,7 @@ class MessageBrokerBeanDefinitionParser implements BeanDefinitionParser {
 		private final List<WebSocketHandlerDecoratorFactory> factories;
 
 
+		@SuppressWarnings("unused")
 		private DecoratingFactoryBean(WebSocketHandler handler, List<WebSocketHandlerDecoratorFactory> factories) {
 			this.handler = handler;
 			this.factories = factories;

spring-websocket/src/main/resources/org/springframework/web/socket/config/spring-websocket-4.2.xsd

@@ -891,6 +891,13 @@
                 ]]></xsd:documentation>
 				</xsd:annotation>
 			</xsd:attribute>
+			<xsd:attribute name="path-helper" type="xsd:string">
+				<xsd:annotation>
+					<xsd:documentation><![CDATA[
+	The bean name of the UrlPathHelper to use for the HandlerMapping used to map handshake requests.
+								]]></xsd:documentation>
+				</xsd:annotation>
+			</xsd:attribute>
 		</xsd:complexType>
 	</xsd:element>
 </xsd:schema>

spring-websocket/src/test/resources/org/springframework/web/socket/config/websocket-config-broker-simple.xml

@@ -6,7 +6,8 @@
 
 	<websocket:message-broker application-destination-prefix="/app"
 							  user-destination-prefix="/personal"
-							  path-matcher="pathMatcher">
+							  path-matcher="pathMatcher"
+							  path-helper="urlPathHelper">
 
 		<!-- message-size=128*1024, send-buffer-size=1024*1024 -->
 		<websocket:transport message-size="131072" send-timeout="25000" send-buffer-size="1048576">
@@ -40,6 +41,10 @@
 		<property name="pathSeparator" value="." />
 	</bean>
 
+	<bean id="urlPathHelper" class="org.springframework.web.util.UrlPathHelper">
+		<property name="alwaysUseFullPath" value="true"/>
+	</bean>
+
 	<bean id="myHandler" class="org.springframework.web.socket.config.TestHandshakeHandler"/>
 	<bean id="barTestInterceptor" class="org.springframework.web.socket.config.BarTestInterceptor"/>
 	<bean id="scheduler" class="org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler"/>