Why transactional cache deserializes the PortableObjects in a call to put ()?

I use a single transactional cache and I put PortableObjects in it. The cache contains an index to a string. the Pof object has 3 fields - long, String and byte [].

I had a breakpoint in my PortableObject constructor in debugging my code and realized that consistency TransactionalCacheWorker wire deserializes the PortableObjects as soon as it receives the order to the customer.

It is worth noting that my tests are on a single JAVA virtual machine - putter and cache are in the same JVM.

I have 1 index on the second string field. However, I noticed in the stacktrace (debugging my code) this consistency was another clue indexed on ValuesKeyExtractor... and I suspect that this index is originally my PortableObject be deserialized on the side of the cache. Ideally my index that uses a PofExtractor should not have required a deserialize. Fix?

In addition, none of the cache.entrySet (filter) operations managed because of this error below. Relevant code snippets and screenshots below:
(Wrapped: Failed request execution for TransactionalCache service on Member(Id=1, Timestamp=2011-11-29 10:57:00.518, ....,
 Role=IntellijRtCommandLineWrapper)) java.lang.UnsupportedOperationException: PofExtractor must be used with POF-encoded Binary entries; the Map Entry is not a BinaryEntry
     at com.tangosol.util.Base.ensureRuntimeException(Base.java:288)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.tagException(Grid.CDB:36)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache.onAggregateFilterRequest(PartitionedCache.CDB:66)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$AggregateFilterRequest.run(PartitionedCache.CDB:1)
     at com.tangosol.coherence.component.util.DaemonPool$WrapperTask.run(DaemonPool.CDB:1)
     at com.tangosol.coherence.component.util.DaemonPool$WrapperTask.run(DaemonPool.CDB:32)
     at com.tangosol.coherence.component.util.DaemonPool$Daemon.onNotify(DaemonPool.CDB:63)
     at com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
     at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.UnsupportedOperationException: PofExtractor must be used with POF-encoded Binary entries; the Map Entry is not a BinaryEntry
     at com.tangosol.util.extractor.PofExtractor.extractInternal(PofExtractor.java:175)
     at com.tangosol.util.extractor.PofExtractor.extractFromEntry(PofExtractor.java:146)
     at com.tangosol.util.InvocableMapHelper.extractFromEntry(InvocableMapHelper.java:294)
     at com.tangosol.util.SimpleMapEntry.extract(SimpleMapEntry.java:168)
     at com.tangosol.util.filter.ExtractorFilter.evaluateEntry(ExtractorFilter.java:94)
     at com.tangosol.util.InvocableMapHelper.evaluateEntry(InvocableMapHelper.java:262)
     at com.tangosol.coherence.transaction.internal.FilterWrapper.evaluateEntry(FilterWrapper.java:135)
     at com.tangosol.util.InvocableMapHelper.evaluateEntry(InvocableMapHelper.java:262)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$Storage.createQueryResult(PartitionedCache.CDB:84)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$Storage.query(PartitionedCache.CDB:72)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache.onAggregateFilterRequest(PartitionedCache.CDB:27)
     ... 6 more
Add indexes:
        this.extIdExtractor = new PofExtractor(String.class, 1);

        begin();
        try {
            getTxnCache().addIndex(this.extIdExtractor, false, null);
        }
        finally {
            commit();
        }
Query:
    Set<Entry> set = getTxnCache().entrySet(new EqualsFilter(extIdExtractor, extId));
Excerpt from PortableObject:
    @Override
    public void readExternal(PofReader pofReader) throws IOException {
        id = pofReader.readLong(0);
        extId = pofReader.readString(1);
        bytes = pofReader.readByteArray(2);
    }

    @Override
    public void writeExternal(PofWriter pofWriter) throws IOException {
        pofWriter.writeLong(0, id);
        pofWriter.writeString(1, extId);
        pofWriter.writeByteArray(2, bytes);
    }

Hello

Even with POF objects an index can give great performance to your queries gains. Without indexes, each query has swept all of the cache and check the fields used by the filters of the POF value for each entry to see if it matches - a bit like an on a full table scan database. Yes, POF can be more effective than deserialization, but get much better performance, lower you the garbage and the lowest CPU utilization using indices.

None of this responsive Ashwin original question.

You have configured your cache to use a serializer POF?

JK

Tags: Fusion Middleware

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