Error while performing WeakConnectivityDFS on restored DEX database

[dotas...@gmail.com]

I've encountered an unexpected behavior in DEX. When I backup and restore a DEX database, followed by weak connectivity analysis, I get an error if any deletions took  place before the backup occurred. I may be making some kind of mistake, or this could be a bug.

I am running on Windows Vista 64. This is the exception:

java.lang.RuntimeException: [DEX: 12] Invalid object identifier.

at com.sparsity.dexjavawrapJNI.dex_algorithms_WeakConnectivityDFS_run(Native Method)

at com.sparsity.dex.algorithms.WeakConnectivityDFS.run(WeakConnectivityDFS.java:43)

at org.navigator.workspace.Workspace.dexBackupTest(Workspace.java:431)

This is code that produced it:

public boolean dexBackupTest(Dex dex)

{

System.out.println("DEX BACKUP TEST");

File tempFile;

try 

{

tempFile = File.createTempFile("graphPool",".temp");

String dexFile = tempFile.getAbsolutePath();

System.out.println("Dex file:" + dexFile);

Database database = dex.create(dexFile, "dex_test");

Session session = database.newSession();

session.begin();

Graph graph = session.getGraph();

int nodeType = graph.newNodeType("Test Node Type");

int indexAttribute = graph.newAttribute(nodeType, "Index", DataType.Integer, AttributeKind.Unique);

long nodeA = graph.newNode(nodeType);

int numNodes = 50;

int numEdges = 50;

for (int i = 0; i < numNodes; i++)

{

long node = graph.newNode(nodeType);

graph.setAttribute(node, indexAttribute, new Value().setInteger(i));

}

Random generator = new Random();

int edgeType = graph.newEdgeType("Default Edge", true, false);

for (int i = 0; i < numEdges; i++)

{

int indexHead = (int)(generator.nextDouble() * numNodes);

int indexTail = (int)(generator.nextDouble() * numNodes);

long head = graph.findObject(indexAttribute, new Value().setInteger(indexHead));

long tail = graph.findObject(indexAttribute, new Value().setInteger(indexTail));

graph.newEdge(edgeType, tail, head);

}

ArrayList<Long> toDelete = new ArrayList<Long>();

Objects objects = graph.select(edgeType);

for (long oid : objects)

{

if (generator.nextDouble() > .7)

{

toDelete.add(oid);

}

}

objects.close();

for (Long oid : toDelete)

{

graph.drop(oid);

}

session.commit();

graph.backup("backup.test");

session.close();

database.close();

Database restoredDatabase = dex.restore("restore.test", "backup.test");

Session restoredSession = restoredDatabase.newSession();

{

WeakConnectivityDFS connectivity = new WeakConnectivityDFS(restoredSession);

connectivity.addAllNodeTypes();

connectivity.addAllEdgeTypes();

connectivity.run();

connectivity.close();

}

restoredSession.close();

restoredDatabase.close();

} 

catch (IOException e) 

{

e.printStackTrace();

return false;

}

return true;

}

[dotas...@gmail.com]

DEX version is 4.8.2

[c3po.ac]

Hi,

Your code is fine. There is a bug in the current release.
A new Dex release will be available next week with this issue solved.

Thank you!


El divendres 20 de setembre de 2013 23:19:02 UTC+2, dotas...@gmail.com va escriure:

DEX version is 4.8.2