Question

我正在spring-data-couchbase 2.1.2使用spring-boot 1.4.0.RC1和couchbase-spring-cache

当禁用缓存时，它正常工作，因为它返回NULL对象当启用缓存并尝试在存储桶中查找不存在的文档时，它会引发异常：

com.couchbase.client.java.error.DocumentDoesNotExistException: null
    at com.couchbase.client.java.CouchbaseAsyncBucket$22.call(CouchbaseAsyncBucket.java:684) ~[java-client-2.2.8.jar:na]
    at com.couchbase.client.java.CouchbaseAsyncBucket$22.call(CouchbaseAsyncBucket.java:671) ~[java-client-2.2.8.jar:na]
    at rx.internal.operators.OperatorMap$1.onNext(OperatorMap.java:54) ~[rxjava-1.0.17.jar:1.0.17]
    at rx.observers.Subscribers$5.onNext(Subscribers.java:234) ~[rxjava-1.0.17.jar:1.0.17]
    at rx.subjects.SubjectSubscriptionManager$SubjectObserver.onNext(SubjectSubscriptionManager.java:223) ~[rxjava-1.0.17.jar:1.0.17]
    at rx.subjects.AsyncSubject.onCompleted(AsyncSubject.java:101) ~[rxjava-1.0.17.jar:1.0.17]
    at com.couchbase.client.core.endpoint.AbstractGenericHandler.completeResponse(AbstractGenericHandler.java:354) ~[core-io-1.2.9.jar:na]
    at com.couchbase.client.core.endpoint.AbstractGenericHandler.access$000(AbstractGenericHandler.java:72) ~[core-io-1.2.9.jar:na]
    at com.couchbase.client.core.endpoint.AbstractGenericHandler$1.call(AbstractGenericHandler.java:372) ~[core-io-1.2.9.jar:na]
    at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55) ~[rxjava-1.0.17.jar:1.0.17]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) ~[na:1.7.0_80]
    at java.util.concurrent.FutureTask.run(FutureTask.java:262) ~[na:1.7.0_80]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178) ~[na:1.7.0_80]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292) ~[na:1.7.0_80]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) ~[na:1.7.0_80]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) ~[na:1.7.0_80]
    at java.lang.Thread.run(Thread.java:745) ~[na:1.7.0_80]
Caused by: rx.exceptions.OnErrorThrowable$OnNextValue: OnError while emitting onNext value: com.couchbase.client.core.message.kv.RemoveResponse.class
    at rx.exceptions.OnErrorThrowable.addValueAsLastCause(OnErrorThrowable.java:109) ~[rxjava-1.0.17.jar:1.0.17]
    at rx.exceptions.Exceptions.throwOrReport(Exceptions.java:188) ~[rxjava-1.0.17.jar:1.0.17]
    at rx.internal.operators.OperatorMap$1.onNext(OperatorMap.java:56) ~[rxjava-1.0.17.jar:1.0.17]
    ... 14 common frames omitted

是不是因为AsyncBucket？是否可以禁用AsyncBucket？

源代码https://github.com/maverickmicky/spring-couchbase-cache

Answer 1

这确实是一个问题......只要对不在缓存中的密钥进行驱逐尝试，就会抛出异常：（

我为此创建了an issue（有解决方法）。

编辑：要解决此问题，您应该能够声明CacheErrorHandler具有handleCacheEvictError方法的DocumentDoesNotExistException方法，只需捕获example = ['ab', 'cd'] res1={x[1]:x[0] for x in example} res2={x[0]:x[1] for x in example} res=res1.update(res2) print res1。请参阅有关配置缓存抽象here和CachingConfigurer javadoc。

的文档部分

Answer 2

我遇到了同样的异常，用例是我正在缓存返回null的资源，例如：

@Override
@Cacheable(value = "EMPLOYEE_", key = "#id")
public Employee getEmployee(int id) {
    return null;
}

使用pip.conf的unless属性修复它，该属性从 Spring 3.2 开始提供，如下所示：

@Override
@Cacheable(value = "EMPLOYEE_", key = "#id", unless = "#result == null")
public Employee getEmployee(int id) {
    return null;
}

还写了一篇文章来描述我的问题并修复了同样的问题 - @Cacheable

spring-data-couchbase为不存在的文档抛出DocumentDoesNotExistException

2 个答案: