Re: AccessControlException when reading from Embedding Neo4j database

On Thursday, February 19, 2015 at 4:38:43 AM UTC+1, Corey Wu wrote:

Hi,

Anyone have experience with getting an embedded Neo4j database running on GWT? I get an AccessControlException when I create the embedded database server side.

Here's my stacktrace:

SEVERE: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call

com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract com.coreywu.uwcompanygraph.client.CompanyGraph com.coreywu.uwcompanygraph.client.QueryGraphService.getGraph()' threw an unexpected exception: java.security.AccessControlException: access denied ("java.io.FilePermission" "\var\uwcompanygraph" "read")

[…] 

at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)

at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)

You cannot use arbitrary files in AppEngine, so Neo4j doesn't work as-is in that environment (see also https://groups.google.com/d/topic/neo4j/QYCUFMRvW1c)

But maybe you just checked (or didn't uncheck) the AppEngine checkbox when creating your project in your IDE but didn't mean to eventually deploy to AppEngine?

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