Hi Adam,
we have a small misunderstanding. I'll give a broader picture of what I'll
try to accomplish.
User opens (Android) app, then registers/logs in with email-password
combination. That's send to an App server (e.g. Google App Engine), that
server forwards the request to Couchbase's Sync Gateway. Sync Gateway
handles the request and gives an appropriate response. E.g. "User was
successfully registered".
The client library you linked is the one I'm using on GAE. Here's the
gradle import:
compile 'com.couchbase.client:java-client:2.2.2'
Here is a bit more code:
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp) throws
IOException {
Cluster cluster = CouchbaseCluster.create("MY-IP");
String username = req.getParameter("username");
String password = req.getParameter("password");
Bucket bucket = cluster.openBucket("MY-BUCKET");
ResponseEntity<String> responseEntity = createLogin(bucket, username,
password);
// TODO: handle result
}
Server falls over at
Cluster cluster = CouchbaseCluster.create("MY-IP");
Stacktrace is in first post.
I use an app server between (Android) app and Couchbase's Sync Gateway
because it is explained on the Couchbase Blog. There is a flow diagram
below the headline App Server:
http://blog.couchbase.com/2015/september/adding-user-sign-up-to-your-android-app-with-node.js-and-couchbase-mobile
I posted my findings first at Couchbase's forum:
https://forums.couchbase.com/t/unable-to-access-couchbasecluster-on-google-app-engine/6231
Regards,
Benjamin Glatzeder
Am Samstag, 19. Dezember 2015 02:08:44 UTC+1 schrieb Adam (Cloud Platform
Support):
>
> Running Couchbase on App Engine would be counterproductive anyway as you
> have no access to local storage for a backing store. You'd want to host
> Couchbase on a Google Compute Engine <https://cloud.google.com/compute/>
> instance where you do have access to local storage and don't have class
> restrictions, and then access it from App Engine via the Couchbase Java
> Client library <https://github.com/couchbase/couchbase-java-client>.
>
> On Friday, December 18, 2015 at 3:30:46 PM UTC-5, Benjamin Glatzeder wrote:
>>
>> Hi!
>>
>> Running this line of code
>> Cluster cluster = CouchbaseCluster.create("MY-IP");
>> in a bare minimum Java GAE produces a crash.
>>
>> Couchbase is a NoSQL database.
>> Gradle import for Couchbase:
>>
>> compile 'com.couchbase.client:java-client:2.2.2'
>>
>>
>> Stacktrace:
>>
>> java.lang.NoClassDefFoundError: Could not initialize class
>> com.google.apphosting.runtime.security.shared.stub.java.nio.channels.spi.SelectorProvider
>>
>> at
>> com.couchbase.client.deps.io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52)
>>
>> at
>> com.couchbase.client.core.env.DefaultCoreEnvironment.<init>(DefaultCoreEnvironment.java:262)
>>
>> at
>> com.couchbase.client.java.env.DefaultCouchbaseEnvironment.<init>(DefaultCouchbaseEnvironment.java:124)
>>
>> at
>> com.couchbase.client.java.env.DefaultCouchbaseEnvironment.<init>(DefaultCouchbaseEnvironment.java:55)
>>
>> at
>> com.couchbase.client.java.env.DefaultCouchbaseEnvironment$Builder.build(DefaultCouchbaseEnvironment.java:472)
>>
>> at
>> com.couchbase.client.java.env.DefaultCouchbaseEnvironment.create(DefaultCouchbaseEnvironment.java:158)
>>
>> at
>> com.couchbase.client.java.CouchbaseCluster.create(CouchbaseCluster.java:164)
>> at
>> com.couchbase.client.java.CouchbaseCluster.create(CouchbaseCluster.java:151)
>> at ben.tests.couch8.backend.MyServlet.doPost(MyServlet.java:40)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
>> at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
>>
>> at
>> com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:125)
>>
>> at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
>>
>> at
>> com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:37)
>>
>> at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
>>
>> at
>> com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:60)
>>
>> at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
>>
>> at
>> com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
>>
>> at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
>>
>> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
>> at
>> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>> at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
>> at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
>> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
>> at
>> com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:260)
>>
>> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>> at org.mortbay.jetty.Server.handle(Server.java:326)
>> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
>> at
>> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
>>
>> at
>> com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:78)
>>
>> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
>> at
>> com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:148)
>>
>> at
>> com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:469)
>>
>> at
>> com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:437)
>>
>> at
>> com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:444)
>>
>> at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:256)
>> at
>> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:308)
>>
>> at
>> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:300)
>>
>> at
>> com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:441)
>>
>> at
>> com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:235)
>>
>> at java.lang.Thread.run(Thread.java:745)
>>
>>
>> As far as I understand is the class
>> (java.nio.channels.spi.SelectorProvider) not allowed to be executed because
>> of security concerns. All white listed Java classes can be found here:
>> https://cloud.google.com/appengine/docs/java/jrewhitelist Unfortunately
>> this class is used by Couchbase. What would be your suggestion? Shall I
>> host the code at another cloud-service provider?
>>
>> Kind regards
>> Benjamin Glatzeder
>>
>>
>>
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