Re: Unexpected return type from space.read()

Hello,

In the meantime tracked outrigger sources down to this:

final Object rslt = 
                space.read(repFor(tmpl), txn, serverTimeout,
queryCookie); if (rslt == null) {
                // should never get null from a non-ifExists query
                throw new AssertionError("space.read() returned null");
            } else if (rslt instanceof EntryRep) {
                // Got an answer, return it
                return entryFrom((EntryRep)rslt);
            } else if (rslt instanceof OutriggerServer.QueryCookie) {
                /* Will still want to go on if there is time, but pass
                 * the new cookie
                 */
                queryCookie = (OutriggerServer.QueryCookie)rslt;
            } else {
                throw new AssertionError(
                    "Unexpected return type from space.read()");
            }

Although my IDE shows for rslt (on reading space):
EntryRep[kuti.service.DealEntry]

the conditional fails regardless:
} else if (rslt instanceof EntryRep) {


resulting in AssertError (I realized why exception handling part works
so)

I'm puzzled...

Zsolt


On Tue, 27 Jun 2006 04:16:46 -0600
Zsolt Kúti <[email protected]> wrote:

> Hello,
> 
> I am a newbie at Jini/JS and now experimenting with them (as of 2.1).
> Successfully wrote a Jini service, that can be seen in Browser (phuh,
> took some time resolve some codebase issue). This service writes into
> a space (the one started by Jini starter kit), the entry written can
> be seen among the Javaspace05 instance's entries. So far...
> Now, as I try to read it back I get the following:
> 
> java.rmi.ServerError: Error in server thread; nested exception is:
>  java.lang.AssertionError: Unexpected return type from space.read()
>  at
> net.jini.jeri.BasicInvocationDispatcher.dispatch(BasicInvocationDispatcher.java:647)
>  at
> com.sun.jini.jeri.internal.runtime.ObjectTable$6.run(ObjectTable.java:597)
> at
> net.jini.export.ServerContext.doWithServerContext(ServerContext.java:103)
> at
> com.sun.jini.jeri.internal.runtime.ObjectTable$Target.dispatch0(ObjectTable.java:595)
> at
> com.sun.jini.jeri.internal.runtime.ObjectTable$Target.access$700(ObjectTable.java:212)
> at
> com.sun.jini.jeri.internal.runtime.ObjectTable$5.run(ObjectTable.java:568)
> at java.security.AccessController.doPrivileged(Native Method) at
> com.sun.jini.jeri.internal.runtime.ObjectTable$Target.dispatch(ObjectTable.java:565)
> at
> com.sun.jini.jeri.internal.runtime.ObjectTable$Target.dispatch(ObjectTable.java:540)
> at
> com.sun.jini.jeri.internal.runtime.ObjectTable$RD.dispatch(ObjectTable.java:778)
> at
> net.jini.jeri.connection.ServerConnectionManager$Dispatcher.dispatch(ServerConnectionManager.java:148)
> at com.sun.jini.jeri.internal.mux.MuxServer$2.run(MuxServer.java:244)
> at java.security.AccessController.doPrivileged(Native Method) at
> com.sun.jini.jeri.internal.mux.MuxServer$1.run(MuxServer.java:241) at
> com.sun.jini.thread.ThreadPool$Worker.run(ThreadPool.java:136) at
> java.lang.Thread.run(Thread.java:595) at
> com.sun.jini.jeri.internal.runtime.Util.__________EXCEPTION_RECEIVED_FROM_SERVER__________(Util.java:108)
> at
> com.sun.jini.jeri.internal.runtime.Util.exceptionReceivedFromServer(Util.java:101)
> at
> net.jini.jeri.BasicInvocationHandler.unmarshalThrow(BasicInvocationHandler.java:1303)
> at
> net.jini.jeri.BasicInvocationHandler.invokeRemoteMethodOnce(BasicInvocationHandler.java:832)
> at
> net.jini.jeri.BasicInvocationHandler.invokeRemoteMethod(BasicInvocationHandler.java:659)
> at
> net.jini.jeri.BasicInvocationHandler.invoke(BasicInvocationHandler.java:528)
> at $Proxy1.takeOut(Unknown Source) at
> kuti.client.CreditApplicationClient.discovered(CreditApplicationClient.java:76)
> at net.jini.discovery.LookupDiscovery$1.run(LookupDiscovery.java:977)
> 
> 
> The code fragment doing this has nothing special:
>         DealEntry d = new DealEntry(n);
>         try {
>             Entry en = space.read(d, null, 10000L);
>         }
>         catch(Exception e) {...}
> 
> Further strange thing is that despite catch presence it doesn't show
> up at server side, but on client side does.
> 
> I've no idea what I do wrong and  could'nt find any hint on the web.
> 
> Thanks for your help!
> 

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