protected List<HandlerMethodArgumentResolver> initArgumentResolvers() {
	ApplicationContext context = getApplicationContext();
	ConfigurableBeanFactory beanFactory = (context instanceof ConfigurableApplicationContext ?
			((ConfigurableApplicationContext) context).getBeanFactory() : null);

	List<HandlerMethodArgumentResolver> resolvers = new ArrayList<>();

	// Annotation-based argument resolution
	resolvers.add(new HeaderMethodArgumentResolver(this.conversionService, beanFactory));
	resolvers.add(new HeadersMethodArgumentResolver());
	resolvers.add(new DestinationVariableMethodArgumentResolver(this.conversionService));

	// Type-based argument resolution
	resolvers.add(new PrincipalMethodArgumentResolver());
	resolvers.add(new MessageMethodArgumentResolver(this.messageConverter));

	resolvers.addAll(getCustomArgumentResolvers());
	resolvers.add(new PayloadMethodArgumentResolver(this.messageConverter, this.validator));

	return resolvers;
}
 

@Override
protected void handleMatch(SimpMessageMappingInfo mapping, HandlerMethod handlerMethod,
		String lookupDestination, Message<?> message) {

	Set<String> patterns = mapping.getDestinationConditions().getPatterns();
	if (!CollectionUtils.isEmpty(patterns)) {
		String pattern = patterns.iterator().next();
		Map<String, String> vars = getPathMatcher().extractUriTemplateVariables(pattern, lookupDestination);
		if (!CollectionUtils.isEmpty(vars)) {
			MessageHeaderAccessor mha = MessageHeaderAccessor.getAccessor(message, MessageHeaderAccessor.class);
			Assert.state(mha != null && mha.isMutable(), "Mutable MessageHeaderAccessor required");
			mha.setHeader(DestinationVariableMethodArgumentResolver.DESTINATION_TEMPLATE_VARIABLES_HEADER, vars);
		}
	}

	try {
		SimpAttributesContextHolder.setAttributesFromMessage(message);
		super.handleMatch(mapping, handlerMethod, lookupDestination, message);
	}
	finally {
		SimpAttributesContextHolder.resetAttributes();
	}
}
 

@Test  // SPR-12170
public void sendToWithDestinationPlaceholders() throws Exception {
	given(this.messageChannel.send(any(Message.class))).willReturn(true);

	Map<String, String> vars = new LinkedHashMap<>(1);
	vars.put("roomName", "roomA");

	String sessionId = "sess1";
	SimpMessageHeaderAccessor accessor = SimpMessageHeaderAccessor.create();
	accessor.setSessionId(sessionId);
	accessor.setSubscriptionId("sub1");
	accessor.setHeader(DestinationVariableMethodArgumentResolver.DESTINATION_TEMPLATE_VARIABLES_HEADER, vars);
	Message<?> message = MessageBuilder.createMessage(PAYLOAD, accessor.getMessageHeaders());
	this.handler.handleReturnValue(PAYLOAD, this.sendToWithPlaceholdersReturnType, message);

	verify(this.messageChannel, times(1)).send(this.messageCaptor.capture());

	SimpMessageHeaderAccessor actual = getCapturedAccessor(0);
	assertEquals(sessionId, actual.getSessionId());
	assertEquals("/topic/chat.message.filtered.roomA", actual.getDestination());
}
 

protected List<HandlerMethodArgumentResolver> initArgumentResolvers() {
	ApplicationContext context = getApplicationContext();
	ConfigurableBeanFactory beanFactory = (context instanceof ConfigurableApplicationContext ?
			((ConfigurableApplicationContext) context).getBeanFactory() : null);

	List<HandlerMethodArgumentResolver> resolvers = new ArrayList<>();

	// Annotation-based argument resolution
	resolvers.add(new HeaderMethodArgumentResolver(this.conversionService, beanFactory));
	resolvers.add(new HeadersMethodArgumentResolver());
	resolvers.add(new DestinationVariableMethodArgumentResolver(this.conversionService));

	// Type-based argument resolution
	resolvers.add(new PrincipalMethodArgumentResolver());
	resolvers.add(new MessageMethodArgumentResolver(this.messageConverter));

	resolvers.addAll(getCustomArgumentResolvers());
	resolvers.add(new PayloadArgumentResolver(this.messageConverter, this.validator));

	return resolvers;
}
 

@Override
protected void handleMatch(SimpMessageMappingInfo mapping, HandlerMethod handlerMethod,
		String lookupDestination, Message<?> message) {

	Set<String> patterns = mapping.getDestinationConditions().getPatterns();
	if (!CollectionUtils.isEmpty(patterns)) {
		String pattern = patterns.iterator().next();
		Map<String, String> vars = getPathMatcher().extractUriTemplateVariables(pattern, lookupDestination);
		if (!CollectionUtils.isEmpty(vars)) {
			MessageHeaderAccessor mha = MessageHeaderAccessor.getAccessor(message, MessageHeaderAccessor.class);
			Assert.state(mha != null && mha.isMutable(), "Mutable MessageHeaderAccessor required");
			mha.setHeader(DestinationVariableMethodArgumentResolver.DESTINATION_TEMPLATE_VARIABLES_HEADER, vars);
		}
	}

	try {
		SimpAttributesContextHolder.setAttributesFromMessage(message);
		super.handleMatch(mapping, handlerMethod, lookupDestination, message);
	}
	finally {
		SimpAttributesContextHolder.resetAttributes();
	}
}
 

@Test  // SPR-12170
public void sendToWithDestinationPlaceholders() throws Exception {
	given(this.messageChannel.send(any(Message.class))).willReturn(true);

	Map<String, String> vars = new LinkedHashMap<>(1);
	vars.put("roomName", "roomA");

	String sessionId = "sess1";
	SimpMessageHeaderAccessor accessor = SimpMessageHeaderAccessor.create();
	accessor.setSessionId(sessionId);
	accessor.setSubscriptionId("sub1");
	accessor.setHeader(DestinationVariableMethodArgumentResolver.DESTINATION_TEMPLATE_VARIABLES_HEADER, vars);
	Message<?> message = MessageBuilder.createMessage(PAYLOAD, accessor.getMessageHeaders());
	this.handler.handleReturnValue(PAYLOAD, this.sendToWithPlaceholdersReturnType, message);

	verify(this.messageChannel, times(1)).send(this.messageCaptor.capture());

	SimpMessageHeaderAccessor actual = getCapturedAccessor(0);
	assertEquals(sessionId, actual.getSessionId());
	assertEquals("/topic/chat.message.filtered.roomA", actual.getDestination());
}
 

protected List<HandlerMethodArgumentResolver> initArgumentResolvers() {
	ConfigurableBeanFactory beanFactory = (getApplicationContext() instanceof ConfigurableApplicationContext ?
			((ConfigurableApplicationContext) getApplicationContext()).getBeanFactory() : null);

	List<HandlerMethodArgumentResolver> resolvers = new ArrayList<HandlerMethodArgumentResolver>();

	// Annotation-based argument resolution
	resolvers.add(new HeaderMethodArgumentResolver(this.conversionService, beanFactory));
	resolvers.add(new HeadersMethodArgumentResolver());
	resolvers.add(new DestinationVariableMethodArgumentResolver(this.conversionService));

	// Type-based argument resolution
	resolvers.add(new PrincipalMethodArgumentResolver());
	resolvers.add(new MessageMethodArgumentResolver());

	resolvers.addAll(getCustomArgumentResolvers());
	resolvers.add(new PayloadArgumentResolver(this.messageConverter, this.validator));

	return resolvers;
}
 

@Override
protected void handleMatch(SimpMessageMappingInfo mapping, HandlerMethod handlerMethod,
		String lookupDestination, Message<?> message) {

	Set<String> patterns = mapping.getDestinationConditions().getPatterns();
	if (!CollectionUtils.isEmpty(patterns)) {
		String pattern = patterns.iterator().next();
		Map<String, String> vars = getPathMatcher().extractUriTemplateVariables(pattern, lookupDestination);
		if (!CollectionUtils.isEmpty(vars)) {
			MessageHeaderAccessor mha = MessageHeaderAccessor.getAccessor(message, MessageHeaderAccessor.class);
			Assert.state(mha != null && mha.isMutable());
			mha.setHeader(DestinationVariableMethodArgumentResolver.DESTINATION_TEMPLATE_VARIABLES_HEADER, vars);
		}
	}

	try {
		SimpAttributesContextHolder.setAttributesFromMessage(message);
		super.handleMatch(mapping, handlerMethod, lookupDestination, message);
	}
	finally {
		SimpAttributesContextHolder.resetAttributes();
	}
}
 

@SuppressWarnings("unchecked")
private Map<String, String> getTemplateVariables(MessageHeaders headers) {
	String name = DestinationVariableMethodArgumentResolver.DESTINATION_TEMPLATE_VARIABLES_HEADER;
	return (Map<String, String>) headers.getOrDefault(name, Collections.emptyMap());
}
 

@SuppressWarnings("unchecked")
private Map<String, String> getTemplateVariables(MessageHeaders headers) {
	String name = DestinationVariableMethodArgumentResolver.DESTINATION_TEMPLATE_VARIABLES_HEADER;
	return (Map<String, String>) headers.getOrDefault(name, Collections.emptyMap());
}
 

@SuppressWarnings("unchecked")
private PlaceholderResolver initVarResolver(MessageHeaders headers) {
	String name = DestinationVariableMethodArgumentResolver.DESTINATION_TEMPLATE_VARIABLES_HEADER;
	Map<String, String> vars = (Map<String, String>) headers.get(name);
	return new DestinationVariablePlaceholderResolver(vars);
}