Java exception using GraphDatabaseService

[Darèios89]

Hi! I'm trying to create new kinds of relationship between nodes....and i have an exception.....this is the code in which i want to make the relationship:

http://pastebin.com/5NfVWihE

I have put the enum relationship in the same code:

http://pastebin.com/gKBNZd9i

The exception is:

org.neo4j.graphdb.NotInTransactionException

at org.neo4j.kernel.impl.persistence.PersistenceManager.getResource(PersistenceManager.java:252)

at org.neo4j.kernel.impl.persistence.PersistenceManager.relationshipCreate(PersistenceManager.java:161)

at org.neo4j.kernel.impl.core.NodeManager.createRelationship(NodeManager.java:253)

at org.neo4j.kernel.impl.core.NodeImpl.createRelationshipTo(NodeImpl.java:523)

at org.neo4j.kernel.impl.core.NodeProxy.createRelationshipTo(NodeProxy.java:207)

at src.main.java.com.era7.bioinfo.bio4j.drug.Prova.main(Prova.java:203)

It is thrown at this line:

Relationship rel = a.getNode().createRelationshipTo(b.getNode(), Prova.DrugRelTypes.KNOWS);  //RELAZIONE PERSONALE

I have no idea what's the matter...

[Pablo Pareja Tobes]

Hi Dareios,

The very same name of the exception gives you the reason. You're trying to modify the contents of the DB outside a transaction.

Cheers,

Pablo

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[Darèios89]

Thanks Pablo....but i have not understood what i need to do to begin the Transaction, i think my code has got all i need to start and finish a transaction....or not?

if(proteins.get(a1).getFullName().equals(protein))

{

Transaction tx= graphDb.beginTx(); //Inizio transazione

try{

ProteinNode a=proteins.get(a1);      //NODO BIO4j

Node n = graphDb.createNode();        //NODE PER COSTRUTTORE DRUG

DrugNode b=new DrugNode(n, (String)drugIDList.get(i), (String)drugname.get(i));  //NODO DRUG

tx.success();

Relationship rel = a.getNode().createRelationshipTo(b.getNode(), Prova.DrugRelTypes.KNOWS);  //RELAZIONE PERSONALE

DrugRel relationship=new DrugRel(rel);  //RELAZIONE DRUG

}

finally{

tx.finish(); //Fine transazione

}

break;

[Pablo Pareja Tobes]

Hi Dareios,

Please check Neo4j's documentation/mail-list for this kind of issues since this is directly related with how to use their technology.

Cheers,

Pablo