Examples with Multiplicity org.janusgraph.core.Multiplicity used on opensource projects

Example 1 with Multiplicity

use of org.janusgraph.core.Multiplicity in project janusgraph by JanusGraph.

the class JanusGraphTest method testConcurrentConsistencyEnforcement.

@Test
public void testConcurrentConsistencyEnforcement() throws Exception {
    PropertyKey name = mgmt.makePropertyKey("name").dataType(String.class).cardinality(Cardinality.SINGLE).make();
    JanusGraphIndex nameIndex = mgmt.buildIndex("name", Vertex.class).addKey(name).unique().buildCompositeIndex();
    mgmt.setConsistency(nameIndex, ConsistencyModifier.LOCK);
    EdgeLabel married = mgmt.makeEdgeLabel("married").multiplicity(Multiplicity.ONE2ONE).make();
    mgmt.setConsistency(married, ConsistencyModifier.LOCK);
    mgmt.makeEdgeLabel("friend").multiplicity(Multiplicity.MULTI).make();
    finishSchema();
    JanusGraphVertex baseV = tx.addVertex("name", "base");
    newTx();
    final long baseVid = getId(baseV);
    final String nameA = "a", nameB = "b";
    final int parallelThreads = 4;
    int numSuccess = executeParallelTransactions(tx -> {
        final JanusGraphVertex a = tx.addVertex();
        final JanusGraphVertex base = getV(tx, baseVid);
        base.addEdge("married", a);
    }, parallelThreads);
    assertTrue("At most 1 tx should succeed: " + numSuccess, numSuccess <= 1);
    numSuccess = executeParallelTransactions(tx -> {
        tx.addVertex("name", nameA);
        final JanusGraphVertex b = tx.addVertex("name", nameB);
        b.addEdge("friend", b);
    }, parallelThreads);
    newTx();
    final long numA = Iterables.size(tx.query().has("name", nameA).vertices());
    final long numB = Iterables.size(tx.query().has("name", nameB).vertices());
    // System.out.println(numA + " - " + numB);
    assertTrue("At most 1 tx should succeed: " + numSuccess, numSuccess <= 1);
    assertTrue(numA <= 1);
    assertTrue(numB <= 1);
}