Orientdb graph database storing objects in vertices

[nandan parikh]

When i store objects in vertices and then try to add edges between those vertices I get the error - Impossible serialize value of type class

[alessand...@gmail.com]

Hi,

can you post your code ?

Regards,

Alessandro 

[nandan parikh]

I need to add the whole 'data' in one property of a vertex. is this not possible at all?      


 OrientGraph graph = new OrientGraph("memory:test");
       
        Data data = new Data();
        data.addData("a","b","c");

        Vertex first = graph.addVertex(null);
        first.setProperty("name","anything");
        first.setProperty("DATA", data);
       
        Vertex second = graph.addVertex(null);
        second.setProperty( "name", "Marko" );
       
       
        Edge lucaKnowsMarko = graph.addEdge(null, first, second, "relation");



Shows this error ::
Exception in thread "main" com.orientechnologies.orient.core.exception.OSerializationException: Impossible serialize value of type class odb.Data with the ODocument binary serializer
    at com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinaryV0.serialize(ORecordSerializerBinaryV0.java:257)
    at com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinary.toStream(ORecordSerializerBinary.java:104)
    at com.orientechnologies.orient.core.record.impl.ODocument.toStream(ODocument.java:2105)
    at com.orientechnologies.orient.core.record.impl.ODocument.toStream(ODocument.java:714)
    at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.commitEntry(OAbstractPaginatedStorage.java:1939)
    at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.commit(OAbstractPaginatedStorage.java:922)
    at com.orientechnologies.orient.core.tx.OTransactionOptimistic.doCommit(OTransactionOptimistic.java:488)
    at com.orientechnologies.orient.core.tx.OTransactionOptimistic.commit(OTransactionOptimistic.java:147)
    at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.commit(ODatabaseDocumentTx.java:2427)
    at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.commit(ODatabaseDocumentTx.java:2397)
    at com.tinkerpop.blueprints.impls.orient.OrientBaseGraph.executeOutsideTx(OrientBaseGraph.java:1705)
    at com.tinkerpop.blueprints.impls.orient.OrientElement.checkForClassInSchema(OrientElement.java:617)
    at com.tinkerpop.blueprints.impls.orient.OrientEdge.getClassName(OrientEdge.java:531)
    at com.tinkerpop.blueprints.impls.orient.OrientEdge.createDocument(OrientEdge.java:568)
    at com.tinkerpop.blueprints.impls.orient.OrientEdge.<init>(OrientEdge.java:76)
    at com.tinkerpop.blueprints.impls.orient.OrientVertex.addEdge(OrientVertex.java:935)
    at com.tinkerpop.blueprints.impls.orient.OrientBaseGraph.addEdge(OrientBaseGraph.java:685)
    at odb.vertex1.main(vertex1.java:25)

[nandan parikh]

I am using the latest version of OrientDB. My only doubt is if I can add Object in any property of a vertex!
Here the object is data which has some of its own properties.

On Friday, 5 June 2015 19:46:14 UTC+5:30, alessand...@gmail.com wrote:

[alessand...@gmail.com]

Hi,

   class Data must implement Serializable and provide for this class get method.

   Try this code 

   first.setProperty("name","anything");

   first.setProperty("DATA", data.getList());

   Regards,

   Alessandro

[nandan parikh]

Thanks!
Now I want to add a JSON Object to the vertex.

I tried using :
   JSONObject json = new JSONObject(); 
 
  Vertex first = graph.addVertex(null);
       json.put("data","anything);
        first.setProperty("allprop",json);
It shows the same serialization error :
    How to add implements serializable to JSON???

Error is :
Exception in thread "main" com.orientechnologies.orient.core.exception.OSerializationException: Impossible serialize value of type class org.json.JSONObject with the ODocument binary serializer

    at com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinaryV0.serialize(ORecordSerializerBinaryV0.java:257)
    at com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinary.toStream(ORecordSerializerBinary.java:104)
    at com.orientechnologies.orient.core.record.impl.ODocument.toStream(ODocument.java:2105)
    at com.orientechnologies.orient.core.record.impl.ODocument.toStream(ODocument.java:714)

    at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.executeSaveRecord(ODatabaseDocumentTx.java:1687)
    at com.orientechnologies.orient.core.tx.OTransactionOptimistic.addRecord(OTransactionOptimistic.java:312)
    at com.orientechnologies.orient.core.tx.OTransactionOptimistic.saveRecord(OTransactionOptimistic.java:253)
    at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.save(ODatabaseDocumentTx.java:2306)
    at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.save(ODatabaseDocumentTx.java:118)
    at com.orientechnologies.orient.core.record.impl.ODocument.save(ODocument.java:1734)
    at com.orientechnologies.orient.core.record.impl.ODocument.save(ODocument.java:1725)
    at com.orientechnologies.orient.core.record.impl.ODocument.save(ODocument.java:98)
    at com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinaryV0.recursiveLinkSave(ORecordSerializerBinaryV0.java:674)
    at com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinaryV0.writeOptimizedLink(ORecordSerializerBinaryV0.java:688)
    at com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinaryV0.writeSingleValue(ORecordSerializerBinaryV0.java:572)
    at com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinaryV0.serialize(ORecordSerializerBinaryV0.java:261)

    at com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinary.toStream(ORecordSerializerBinary.java:104)
    at com.orientechnologies.orient.core.record.impl.ODocument.toStream(ODocument.java:2105)
    at com.orientechnologies.orient.core.record.impl.ODocument.toStream(ODocument.java:714)
    at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.commitEntry(OAbstractPaginatedStorage.java:1939)
    at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.commit(OAbstractPaginatedStorage.java:922)
    at com.orientechnologies.orient.core.tx.OTransactionOptimistic.doCommit(OTransactionOptimistic.java:488)
    at com.orientechnologies.orient.core.tx.OTransactionOptimistic.commit(OTransactionOptimistic.java:147)
    at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.commit(ODatabaseDocumentTx.java:2427)
    at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.commit(ODatabaseDocumentTx.java:2397)

    at com.tinkerpop.blueprints.impls.orient.OrientTransactionalGraph.commit(OrientTransactionalGraph.java:162)
    at odb.vedge.main(vedge.java:39)

[alessand...@gmail.com]

Hi,

   try this code

   Data data = new Data();

   data.addData("a","b","c");

    

   Gson gson = new Gson();

   String json = gson.toJson(data);

   Vertex first = graph.addVertex(null);

   first.setProperty("name","anything");

   first.setProperty("allprop",json.toString()); 

  Regards,

  Alessandro

[nandan parikh]

converting to string works for all objects.

Is there any way we can store the json object without converting to toString() ???

[alessand...@gmail.com]

Hi,

i have tried this code and it seems to work

OrientGraph graph = new OrientGraph("memory:test");

    

     Data data = new Data();

     data.setNome("New Data");

     data.addData("a","b","c");

    

     JSONObject json=new JSONObject();

     json.put("data", data);

     

     Vertex first = graph.addVertex(null);

     first.setProperty("name","anything");

     first.setProperty("allprop",json);

     

     Vertex second = graph.addVertex(null);

     second.setProperty( "name", "Marko" );

     

     Edge lucaKnowsMarko = graph.addEdge(null, first, second, "relation");

Bye, Alessandro.

[nandan parikh]

Copy pasted your code and I get this error

Exception in thread "main" com.orientechnologies.orient.core.exception.OSerializationException: Impossible serialize value of type class org.json.JSONObject with the ODocument binary serializer
    at com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinaryV0.serialize(ORecordSerializerBinaryV0.java:257)
    at com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinary.toStream(ORecordSerializerBinary.java:104)
    at com.orientechnologies.orient.core.record.impl.ODocument.toStream(ODocument.java:2105)
    at com.orientechnologies.orient.core.record.impl.ODocument.toStream(ODocument.java:714)

    at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.commitEntry(OAbstractPaginatedStorage.java:1939)
    at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.commit(OAbstractPaginatedStorage.java:922)
    at com.orientechnologies.orient.core.tx.OTransactionOptimistic.doCommit(OTransactionOptimistic.java:488)
    at com.orientechnologies.orient.core.tx.OTransactionOptimistic.commit(OTransactionOptimistic.java:147)
    at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.commit(ODatabaseDocumentTx.java:2427)
    at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.commit(ODatabaseDocumentTx.java:2397)

    at com.tinkerpop.blueprints.impls.orient.OrientBaseGraph.executeOutsideTx(OrientBaseGraph.java:1705)
    at com.tinkerpop.blueprints.impls.orient.OrientElement.checkForClassInSchema(OrientElement.java:617)
    at com.tinkerpop.blueprints.impls.orient.OrientEdge.getClassName(OrientEdge.java:531)
    at com.tinkerpop.blueprints.impls.orient.OrientEdge.createDocument(OrientEdge.java:568)
    at com.tinkerpop.blueprints.impls.orient.OrientEdge.<init>(OrientEdge.java:76)
    at com.tinkerpop.blueprints.impls.orient.OrientVertex.addEdge(OrientVertex.java:935)
    at com.tinkerpop.blueprints.impls.orient.OrientBaseGraph.addEdge(OrientBaseGraph.java:685)

    at odb.vedge.main(vedge.java:35)
Jun 08, 2015 6:36:30 PM com.orientechnologies.common.log.OLogManager log
INFO: - closing storage: tinkerpop...

[alessand...@gmail.com]

Hi,

I have created a small example with the class Data and the class Test

Let me know if it works.

Alessandro

[nandan parikh]

Though it did not work, I figured out the solution.
Serialization error will go only if the Json Object is converted to Json string before storing, and then retrieving the Json string and converting back to Json obejct.

Thanks anyways.
Cheers.