Question

我正在使用Google Apps Engine SDK 1.9.12在本地测试一些代码。我添加了一个servlet监听器来初始化带有2个命名空间的memcache。我在方法contextDestroyed(ServletContextEvent sce)中添加了代码以清除Memcache条目：

MemcacheServiceFactory.getMemcacheService().clearAll();

这实际上会引发以下异常并且服务器已关闭：

WARNING: EXCEPTION 
com.google.apphosting.api.ApiProxy$CallNotFoundException: The API package 'memcache' or call 'FlushAll()' was not found.
    at com.google.apphosting.api.ApiProxy$1.get(ApiProxy.java:179)
    at com.google.apphosting.api.ApiProxy$1.get(ApiProxy.java:177)
    at com.google.appengine.api.utils.FutureWrapper.get(FutureWrapper.java:88)
    at com.google.appengine.api.memcache.MemcacheServiceImpl.quietGet(MemcacheServiceImpl.java:26)
    at com.google.appengine.api.memcache.MemcacheServiceImpl.clearAll(MemcacheServiceImpl.java:170)
    at com.valeo.general.util.BaseCacheManager.clearAll(BaseCacheManager.java:47)
    at com.valeo.general.listeners.BaseCacheListener.contextDestroyed(BaseCacheListener.java:27)
    at org.mortbay.jetty.handler.ContextHandler.doStop(ContextHandler.java:599)
    at org.mortbay.jetty.webapp.WebAppContext.doStop(WebAppContext.java:505)
    at org.mortbay.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:76)
    at org.mortbay.jetty.handler.HandlerWrapper.doStop(HandlerWrapper.java:142)
    at org.mortbay.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:76)
    at com.google.appengine.tools.development.JettyContainerService.reloadWebApp(JettyContainerService.java:393)
    at com.google.appengine.tools.development.JettyContainerService$2.filesChanged(JettyContainerService.java:380)
    at org.mortbay.util.Scanner.reportBulkChanges(Scanner.java:486)
    at org.mortbay.util.Scanner.reportDifferences(Scanner.java:352)
    at org.mortbay.util.Scanner.scan(Scanner.java:280)
    at org.mortbay.util.Scanner$1.run(Scanner.java:232)
    at java.util.TimerThread.mainLoop(Unknown Source)
    at java.util.TimerThread.run(Unknown Source)

请帮我解决这个问题。

Answer 1

当App Engine Java框架在contextDestroyed(ServletContextEvent)中调用您的代码时，它已经拆除了与后端服务的连接，包括memcache。

很遗憾，您无法使用ServletContextListener在关机时执行内存缓存操作。

API包＆＃39; memcache＆＃39;或致电＆＃39; FlushAll（）＆＃39;没找到

1 个答案: