java - 如何实现SpringRetry

Question

我有2个类。一个是Msgcontroller.java，另一个类是RetryProcess.java

在Msgcontroller.java中，我使用以下方法

public String getSampleService() throws IOException,
            UnsupportedEncodingException, HttpException {
        // Read from request

        StringBuilder buffer = new StringBuilder();
        BufferedReader reader = request.getReader();
        String line;
        while ((line = reader.readLine()) != null) {
            buffer.append(line);
        }
        String data = buffer.toString();
        StringRequestEntity requestEntity = null;
        StringBuffer eventResponse = new StringBuffer();
        HttpClient httpclient = new HttpClient();
        InputStream inputStream = null;
        int statusCode;
        BufferedReader br = null;
        String jsonReceive = null;
        logger.info("RequestJson" + data);
        baseServiceUrl = "http://localhost:8080/oif";

        apiServiceUrl = "/services/rest/item";

        requestEntity = new StringRequestEntity(data, MEDIA_TYPE, FORMAT);
        PostMethod postMethod = new PostMethod(baseServiceUrl + apiServiceUrl);
        postMethod.setRequestEntity(requestEntity);
        statusCode = httpclient.executeMethod(postMethod);
        logger.info("Status code from item service call" + statusCode);
        inputStream = postMethod.getResponseBodyAsStream();
        if (null != inputStream) {
            br = new BufferedReader(new InputStreamReader(inputStream, FORMAT));
            for (line = br.readLine(); line != null; line = br.readLine()) {
                eventResponse = eventResponse.append(line);
            }
        }
        jsonReceive = eventResponse.toString();
        logger.info("JsonReceive" + jsonReceive);
        return jsonReceive;
    }

并在RetryProcess.java中

public class RetryProcess {
    private static final Logger logger  = LogManager.getLogger(RetryProcess.class);
@Retryable(
        value={Exception.class},
        maxAttempts=2,
        backoff=@Backoff(delay=5000)
        )
public void getSplSevice() throws UnsupportedEncodingException, HttpException, IOException{
    Msgcontroller msg=new Msgcontroller ();
    logger.info("Retryprocess");
    msg.getSampleService();
}
}

但是当 MsgController 中的 getSampleService() 发生异常时，RetryProcess.java 不起作用。任何人都可以帮助我

Answer 1

如果 @Retrayble 抛出异常，您必须使用 @Recover 这是一个后备方法。在这种情况下，您可以使用带有 @Recover 注释和异常详细信息的另一种方法。方法结构如下。

@Recover
    void recover(Exception e, String someParams) {
... other code
}

欲了解更多详情，您可以查看此链接。 https://www.baeldung.com/spring-retry