Websocket with ActiveMQ support multi session? - spring-boot

Question

I have spring boot application use websocket and embeded ActiveMQ, when user (TestUser) subscribe /user/TestUser/reply in two different browser at the same time ,then send message to him one browser received the another not , send again new one the second receive but first one not and so on…… .
What I expected when send message to /user/TestUser/reply , if he is open two browsers as the same time should receive the message in two browser at the same time.
POM.xml
<!-- WebSocket libraries -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-activemq</artifactId>
</dependency>
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-stomp</artifactId>
</dependency>
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-kahadb-store</artifactId>
<scope>runtime</scope>
</dependency>
WebSocketConfig
#Configuration
#EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {
#Override
public void configureMessageBroker(MessageBrokerRegistry config) {
config.setApplicationDestinationPrefixes("/app")
.setUserDestinationPrefix("/user")
.enableStompBrokerRelay("/user");
}
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/websocket").addInterceptors(new HttpHandshakeInterceptor()).withSockJS();
}
#Override
public void configureClientInboundChannel(ChannelRegistration registration) {
registration.setInterceptors(new TopicSubscriptionInterceptor());
}
#Bean
public BrokerService broker() throws Exception {
BrokerService broker = new BrokerService();
broker.setSchedulePeriodForDestinationPurge(10000);
broker.addConnector("stomp://localhost:61613");
PolicyMap policyMap = new PolicyMap();
PolicyEntry policyEntry = new PolicyEntry();
policyEntry.setGcInactiveDestinations(true);
policyEntry.setInactiveTimeoutBeforeGC(30000);
policyEntry.setQueue(">");
List<PolicyEntry> entries = new ArrayList<PolicyEntry>();
entries.add(policyEntry);
policyMap.setPolicyEntries(entries);
broker.setDestinationPolicy(policyMap);
return broker;
}
UI
function connect() {
var socket = new SockJS('/websocket');
stompClient = Stomp.over(socket);
stompClient.connect({}, function (frame) {
setConnected(true);
console.log('Connected: ' + frame);
stompClient.subscribe('/user/TestUser/reply', function (greeting) {
message = greeting;
showGreeting(greeting);
}, {'ack': 'client-individual'});
});
}

Answer 1

If you change your UI code to use topic, like this:
stompClient.subscribe('/topic/reply/'+ frame.headers['user-name'], function (greeting) { ...
and configure relay to /topic
config.setApplicationDestinationPrefixes("/app")
.enableStompBrokerRelay("/topic");
and send messages like :
simpMessageTemplate.convertAndSend("/topic/reply/" + principal, payload, headers);
than every connected client will recieve his message copy.
frame.headers['user-name'] some spring magic header with current logged in principal, returned on connect. don't know who adds it, maybe spring-security.
If you want to do it with anon user, you have to generate user-id on client side, store it somewhere ( localstorage or cookie ) and pass to server side to use as principal name.
EDIT:
If you want to restict connection to topic to only one user, you can do this like this (in TopicSubscriptionInterceptor):
#Override
public Message<?> preSend(Message<?> message, MessageChannel channel) {
StompHeaderAccessor sha = StompHeaderAccessor.wrap(message);
switch (sha.getCommand()) {
case SUBSCRIBE:
case SEND:
if(!sha.getDestination().equals("/topic/reply/" + sha.getUser().getName()) return null;
break;
}
...
return message;
}