gpt4 book ai didi

java - Spring Boot,从 websocket 调用 ControllerLinkBuilder.linkTo 时出现 java.lang.IllegalStateException

转载 作者:搜寻专家 更新时间:2023-10-31 08:04:56 24 4
gpt4 key购买 nike

从 websocket 调用 ControllerLinkBuilder.linkTo 时出现以下错误。

 java.lang.IllegalStateException: Could not find current request via RequestContextHolder
at org.springframework.util.Assert.state(Assert.java:385)
at org.springframework.hateoas.mvc.ControllerLinkBuilder.getCurrentRequest(ControllerLinkBuilder.java:234)
at org.springframework.hateoas.mvc.ControllerLinkBuilder.getBuilder(ControllerLinkBuilder.java:186)
at org.springframework.hateoas.mvc.ControllerLinkBuilderFactory.linkTo(ControllerLinkBuilderFactory.java:117)
at org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo(ControllerLinkBuilder.java:135)
at urlshortener2014.common.web.UrlShortenerController.createAndSaveIfValid(UrlShortenerController.java:94)
at urlshortener2014.richcarmine.web.UrlShortenerControllerWithLogs.access$200(UrlShortenerControllerWithLogs.java:45)
at urlshortener2014.richcarmine.web.UrlShortenerControllerWithLogs$CreateCallable.call(UrlShortenerControllerWithLogs.java:226)
at urlshortener2014.richcarmine.massiveShortenerNaiveWS.ShortURLWSGenerator.onCall(ShortURLWSGenerator.java:41)
at urlshortener2014.richcarmine.massiveShortenerNaiveWS.ShortURLWSGenerator.onCall(ShortURLWSGenerator.java:15)
at urlshortener2014.richcarmine.massiveShortenerREST.RequestContextAwareCallable.call(RequestContextAwareCallable.java:26)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

整个项目都是关于缩短 url,作为我使用 spring websockets 的第一种方法,我试图通过从任何 url 回复缩短的 url 来让它工作。

我的TextWebSocketHandler

public class MyHandler extends TextWebSocketHandler {

AtomicLong messageOrder = new AtomicLong(0);
ExecutorService threadPool = Executors.newCachedThreadPool();
CompletionService<CSVContent> pool = new ExecutorCompletionService<>(threadPool);

/* controller reference */
@Autowired
UrlShortenerControllerWithLogs controller;

@Override
protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
logger.info("WS: " + message.getPayload());
long order = messageOrder.getAndIncrement();
pool.submit(new ShortURLWSGenerator(order,message.getPayload(),"","","",session.getRemoteAddress(),controller));
CSVContent content = pool.take().get();
session.sendMessage(new TextMessage("Echo Test: " + content.getShortURL().getUri()));
}
}

这是ShortURLWSGenerator

public class ShortURLWSGenerator extends RequestContextAwareCallable<CSVContent>{
...
@Override
public CSVContent onCall() {

ShortURL shortURL = null;
try {
shortURL = controller. new CreateCallable(url,sponsor,brand,owner,address.toString()).call();
} catch (Exception e) {
e.printStackTrace();
}

CSVContent content = new CSVContent();
content.setOrder(order);
content.setShortURL(shortURL);

return content;
}
}

二手 RequestContextAwareCallable它在实现与 REST 服务相同的功能时解决了同样的问题,无论如何,即使使用简单的 Callable,我仍然会遇到同样的错误。

这里是 CreateCallable 只是包装了 main 函数

public class CreateCallable implements Callable<ShortURL>{
...
@Override
public ShortURL call() throws Exception {
/* explodes while creating the new short url */
return createAndSaveIfValid(url,sponsor,brand,owner,ip);
}
}

最后是 createAndSaveIfValid,它调用 ControllerLinkBuilder.linkTo

protected ShortURL createAndSaveIfValid(String url, String sponsor,
String brand, String owner, String ip) {
UrlValidator urlValidator = new UrlValidator(new String[] { "http",
"https" });
if (urlValidator.isValid(url)) {
String id = Hashing.murmur3_32()
.hashString(url, StandardCharsets.UTF_8).toString();
ShortURL su = new ShortURL(id, url,
linkTo(
methodOn(UrlShortenerController.class).redirectTo(
id, null)).toUri(), sponsor, new Date(
System.currentTimeMillis()), owner,
HttpStatus.TEMPORARY_REDIRECT.value(), true, ip, null);
return shortURLRepository.save(su);
} else {
return null;
}
}

完整工程可见here on github

最佳答案

密切相关的一点是,对于那些单元测试其具体 ResourceAssemblerSupport 实现并体验相同堆栈跟踪的人,以下是模拟它的方法:

@Before
public void setup() {
HttpServletRequest mockRequest = new MockHttpServletRequest();
ServletRequestAttributes servletRequestAttributes = new ServletRequestAttributes(mockRequest);
RequestContextHolder.setRequestAttributes(servletRequestAttributes);
}

@After
public void teardown() {
RequestContextHolder.resetRequestAttributes();
}

关于java - Spring Boot,从 websocket 调用 ControllerLinkBuilder.linkTo 时出现 java.lang.IllegalStateException,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27802786/

24 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com