PubSub Java-API在AppEngine上使用受限SelectorProvider

Question

尝试在我的AppEngine中使用AppEngine，我添加了以下内容

<dependency>
    <groupId>com.google.cloud</groupId>
    <artifactId>google-cloud-pubsub</artifactId>
    <version>0.6.0</version>
</dependency>

当我试图获取我的PubSub实例时

PubSub pubsub = PubSubOptions.getDefaultInstance().getService();

我收到这一例外：

java.lang.NoClassDefFoundError: java.nio.channels.spi.SelectorProvider is a restricted class. Please see the Google App Engine developer's guide for more details.
at com.google.apphosting.runtime.security.shared.stub.java.nio.channels.spi.SelectorProvider.<clinit>(SelectorProvider.java)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:59)
at io.grpc.netty.Utils$DefaultEventLoopGroupResource.create(Utils.java:187)
at io.grpc.netty.Utils$DefaultEventLoopGroupResource.create(Utils.java:171)
at io.grpc.internal.SharedResourceHolder.getInternal(SharedResourceHolder.java:124)
at io.grpc.internal.SharedResourceHolder.get(SharedResourceHolder.java:94)
at io.grpc.netty.NettyChannelBuilder$NettyTransportFactory.<init>(NettyChannelBuilder.java:311)
at io.grpc.netty.NettyChannelBuilder$NettyTransportFactory.<init>(NettyChannelBuilder.java:280)
at io.grpc.netty.NettyChannelBuilder.buildTransportFactory(NettyChannelBuilder.java:230)
at io.grpc.internal.AbstractManagedChannelImplBuilder.build(AbstractManagedChannelImplBuilder.java:239)
at com.google.api.gax.grpc.InstantiatingChannelProvider.createChannel(InstantiatingChannelProvider.java:120)
at com.google.api.gax.grpc.InstantiatingChannelProvider.getChannel(InstantiatingChannelProvider.java:107)
at com.google.api.gax.grpc.ProviderManager.getChannel(ProviderManager.java:107)
at com.google.api.gax.grpc.ChannelAndExecutor.create(ChannelAndExecutor.java:68)
at com.google.api.gax.grpc.ServiceApiSettings.getChannelAndExecutor(ServiceApiSettings.java:82)
at com.google.cloud.pubsub.spi.v1.PublisherApi.<init>(PublisherApi.java:203)
at com.google.cloud.pubsub.spi.v1.PublisherApi.create(PublisherApi.java:194)
at com.google.cloud.pubsub.spi.DefaultPubSubRpc.<init>(DefaultPubSubRpc.java:168)
at com.google.cloud.pubsub.PubSubOptions$DefaultPubSubRpcFactory.create(PubSubOptions.java:69)
at com.google.cloud.pubsub.PubSubOptions$DefaultPubSubRpcFactory.create(PubSubOptions.java:63)
at com.google.cloud.ServiceOptions.getRpc(ServiceOptions.java:478)
at com.google.cloud.pubsub.PubSubImpl.<init>(PubSubImpl.java:115)
at com.google.cloud.pubsub.PubSubOptions$DefaultPubSubFactory.create(PubSubOptions.java:44)
at com.google.cloud.pubsub.PubSubOptions$DefaultPubSubFactory.create(PubSubOptions.java:39)
at com.google.cloud.ServiceOptions.getService(ServiceOptions.java:465)

我理解GAE不允许java.nio代码，但我不明白谷歌如何能为我们提供一个不运行在他们自己的系统上的PubSub API库。

我是不是遗漏了什么？一些罐子错配？我找不到任何可疑的罐子大火。我怎么才能让这个起作用？

Answer 1

罗伯特谢谢你的报道。解决问题。同时，请使用Google客户端Java库。这里有一个指向酒吧/次级客户的链接，特别是。