@cacheput不更新缓存

Question

@Service
public class SlowService {

    String text = "Initial value";

    @Cacheable("text")
    public String getText() {
        try {
            TimeUnit.SECONDS.sleep(2);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return text;
    }

    @CachePut(value = "text", key = "#newText + 1")
    public String setText(String newText) {
        text = newText;
        return text;
    }
}

@Cacheable(value = "text", key = "#someKey")
    public String getText() {
        try {
            TimeUnit.SECONDS.sleep(2);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return text;
    }

    @CachePut(key = "#someKey")
    public String setText(String newText) {
        text = newText;
        return text;
    }

Answer 1

您需要确保在缓存中缓存的值被与在使用cache Put时相同的键引用。

例如：

假设您正在用键“hw”缓存文本“hello world”。您的缓存将保存一个值为“Hello World”的键“HW”。

@Cacheable(value = "text", key = "hw")
public String getText() {
    try {
        TimeUnit.SECONDS.sleep(2);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    return text;
}

@CachePut(key = "hw")
public String setText(String newText) {
    text = newText;
    return text;
}