Spring Boot WebSocket with embedded ActiveMQ Broker - spring

Question

I tried to change an web application from simple broker to an embedded ActiveMq Broker with stomp using Spring boot 1.5.4 but always getting an error on start up
Caused by: java.lang.IllegalArgumentException: No handlers
at org.springframework.util.Assert.isTrue(Assert.java:92) ~[spring-core-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.web.socket.messaging.SubProtocolWebSocketHandler.start(SubProtocolWebSocketHandler.java:244) ~[spring-websocket-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:175) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE]
... 15 common frames omitted
I reduced the failure with an simple example
POM File *
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>websocket</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>websocket</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-activemq</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
</dependency>
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-stomp</artifactId>
</dependency>
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-net</artifactId>
</dependency>
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-core</artifactId>
</dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>4.1.2.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Application Class
package com.example.websocket;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class WebsocketApplication {
public static void main(String[] args) {
SpringApplication.run(WebsocketApplication.class, args);
}
}
WebSocketConfig Class
package com.example.websocket;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.jms.annotation.EnableJms;
import org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurationSupport;
#Configuration
#EnableWebSocket
#EnableWebSocketMessageBroker
#EnableJms
public class WebSocketConfig extends WebSocketMessageBrokerConfigurationSupport {
#Value("${spring.activemq.user}")
private String mqUser;
#Value("${spring.activemq.password}")
private String mqPasword;
#Override
public void configureMessageBroker(final MessageBrokerRegistry config) {
config.enableStompBrokerRelay("/topic") //
.setRelayHost("localhost") //
.setRelayPort(61613) //
.setClientLogin(mqUser) //
.setClientPasscode(mqPasword) //
;
config.setApplicationDestinationPrefixes("/app");
}
#Override
public void registerStompEndpoints(final StompEndpointRegistry registry) {
registry.addEndpoint("/websocket").withSockJS();
}
}
application.yml
spring:
activemq:
broker-url: stomp://localhost:61613
user: user
password: pass
Someone knows my mistake?

Answer 1

I found the solution. My problem was the EnableWebSocketMessageBroker Annotation and missing deployment of ActiveMQ Broker
Remove the application.yml and change WebSocketConfig class to
package com.example.websocket;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.jmx.ManagementContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurationSupport;
#Configuration
#EnableWebSocket
public class WebSocketConfig extends WebSocketMessageBrokerConfigurationSupport {
#Override
public void configureMessageBroker(final MessageBrokerRegistry config) {
config.enableStompBrokerRelay("/topic") //
.setRelayHost("localhost") //
.setRelayPort(61613);
config.setApplicationDestinationPrefixes("/app");
}
#Override
public void registerStompEndpoints(final StompEndpointRegistry registry) {
registry.addEndpoint("/websocket").withSockJS();
}
#Bean(initMethod = "start", destroyMethod = "stop")
public BrokerService broker() throws Exception {
final BrokerService broker = new BrokerService();
broker.addConnector("stomp://localhost:61613");
broker.setPersistent(false);
final ManagementContext managementContext = new ManagementContext();
managementContext.setCreateConnector(true);
broker.setManagementContext(managementContext);
return broker;
}
}
works for me.