我有一个绝对简单的SpringBoot项目,它具有简单的配置和简单的集成测试来测试WebSockets。
pom.xml
<?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>sandbox.websocket</groupId>
<artifactId>websocket</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<properties>
<java.version>1.8</java.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
SpringBootApplication:
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
消息代理配置
@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
@Override
public void configureMessageBroker(MessageBrokerRegistry registry) {
registry.enableSimpleBroker("/topic");
}
@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/greeting")
.withSockJS();
}
}
集成测试,只需连接到服务器,订阅消息代理并发送消息即可。
@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
@DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_EACH_TEST_METHOD)
public class WebSocketIntegrationTest {
@LocalServerPort
private int localServerPort;
private BlockingQueue<String> blockingQueue;
@Before
public void setup() {
blockingQueue = new LinkedBlockingDeque<>();
}
@Test
public void shouldReceiveAMessageFromTheServer() throws Exception {
String uri = "ws://localhost:" + localServerPort + "/greeting";
WebSocketStompClient stompClient = new WebSocketStompClient(
new SockJsClient(Collections.singletonList(
new WebSocketTransport(
new StandardWebSocketClient()))));
String message = "MESSAGE TEST";
ListenableFuture<StompSession> connect = stompClient.connect(uri, new StompSessionHandlerAdapter() {});
StompSession session = connect.get(1, SECONDS);
session.subscribe("/topic", new DefaultStompFrameHandler());
session.send("/topic", message.getBytes());
Assert.assertEquals(message, blockingQueue.poll(10, SECONDS));
}
class DefaultStompFrameHandler implements StompFrameHandler {
@Override
public Type getPayloadType(StompHeaders stompHeaders) {
return byte[].class;
}
@Override
public void handleFrame(StompHeaders stompHeaders, Object o) {
System.out.println("=============================================================");
System.out.println(new String((byte[]) o));
System.out.println("=============================================================");
blockingQueue.offer(new String((byte[]) o));
}
}
}
如果我运行它并从javascript客户端对其进行测试,则它的工作原理就像一个魅力。 如果我运行集成测试,它仅在某些时候有效。问题在于,有时不会调用DefaultStompFrameHandler.handleFrame()方法,因此没有任何内容保存到队列中并且断言失败。
我写了一个InboundChannel拦截器来拦截帧并向控制台打印命令,并且所有四个命令都一直打印(CONNECT,SUBSCRIBE,SEND,DISCONNECT)。
因此,包括SEND在内的所有命令都将发送到服务器,但是有时(60-70%)StompFrameHandler不会使用,无论将queue.poll超时设置了多长时间。
有什么帮助吗?