ObjectifyService.begin() 抛出 IllegalStateException

Question

我正在尝试为我的 Maven 项目使用 google 云数据存储，但遇到了一些麻烦。

当我执行

Consumer consumer=new Consumer(username+password,username,password,name,email) {
    ofy().save().entity(consumer).now(); }

它在 ObjectifyFilter.class 停在

try (Closeable closeable = ObjectifyService.begin()) {   ..

它抛出

java.lang.IllegalStateException at com.google.appengine.repackaged.com.google.common.base.Preconditions.checkState(Preconditions.java:443) at com.google.appengine.api.datastore.DatastoreServiceGlobalConfig$Builder.build(DatastoreServiceGlobalConfig.java:233) at com.google.appengine.api.datastore.DatastoreServiceGlobalConfig.fromEnv(DatastoreServiceGlobalConfig.java:311) at com.google.appengine.api.datastore.DatastoreServiceGlobalConfig.getConfig(DatastoreServiceGlobalConfig.java:47) at com.google.appengine.api.datastore.DatastoreServiceFactoryImpl.getAsyncDatastoreService(DatastoreServiceFactoryImpl.java:19) at com.google.appengine.api.datastore.DatastoreServiceFactoryImpl.getAsyncDatastoreService(DatastoreServiceFactoryImpl.java:9) at com.google.appengine.api.datastore.DatastoreServiceFactory.getAsyncDatastoreService(DatastoreServiceFactory.java:32) at com.googlecode.objectify.ObjectifyFactory.createRawAsyncDatastoreService(ObjectifyFactory.java:133) at com.googlecode.objectify.ObjectifyFactory.createAsyncDatastoreService(ObjectifyFactory.java:121) at com.googlecode.objectify.impl.ObjectifyImpl.createAsyncDatastoreService(ObjectifyImpl.java:246) at com.googlecode.objectify.impl.ObjectifyImpl.createWriteEngine(ObjectifyImpl.java:257) at com.googlecode.objectify.impl.SaverImpl.entities(SaverImpl.java:60) at com.googlecode.objectify.impl.SaverImpl.entity(SaverImpl.java:35) at it.units.view.ConsumerView.createConsumer(ConsumerView.java:43) at it.units.controller.login.processRequest(login.java:45) at it.units.controller.login.doPost(login.java:92) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:867) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1623) at com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:48) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610) at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:134) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610) at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:48) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610) at com.google.appengine.tools.development.jetty9.StaticFileFilter.doFilter(StaticFileFilter.java:123) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610) at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366) at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349) at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610) at com.google.appengine.tools.development.DevAppServerRequestLogFilter.doFilter(DevAppServerRequestLogFilter.java:44) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247) at com.google.appengine.tools.development.jetty9.DevAppEngineWebAppContext.doScope(DevAppEngineWebAppContext.java:94) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at com.google.appengine.tools.development.jetty9.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:595) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.Server.handle(Server.java:502) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) at org.eclipse.jetty.io.ChannelEndPoint.run(ChannelEndPoint.java:118) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765) at org.eclipse.jetty.util.thread.QueuedThreadPool.run(QueuedThreadPool.java:683) at java.lang.Thread.run(Thread.java:748)

实体注册操作完成。服务器启动时发生：

public void contextInitialized(ServletContextEvent event) {

    ObjectifyService.register(Consumer.class);
    ObjectifyService.register(Administrator.class);
    ObjectifyService.register(Uploader.class);
    ObjectifyService.register(File.class);
}

但在那之后我无法可视化数据存储中的实体。我应该见他们，对吗？ （我确定它确实进行了注册操作，我在调试模式下检查过）

有人可以帮助我吗？

Answer 1

appengine SDK 正在抛出该异常 - 它看起来像是某种配置问题。它应该包括解释问题的异常消息。

注册实体不会对数据存储区中的数据执行任何操作。它仅在您的应用程序 VM 中配置软件。数据存储区显示您已保存的实体——请记住它几乎是无模式的；您可以随时创建任意种类。

也许退后一步，实施快速秒杀以熟悉环境。暂时跳过 Objectify，编写一个使用低级 API（DatastoreServiceFactory 和 DatastoreService）的应用程序，将一个简单的测试实体写入数据存储。一旦可行（证明您的配置），然后继续使用 Objectify。

Answer 2

感谢您的帮助！我通过添加

解决了

    <plugin>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-maven-plugin</artifactId>
        <version>9.4.14.v20181114</version>
    </plugin>