Java Vertex.remove方法代碼示例

import org.apache.tinkerpop.gremlin.structure.Vertex; //導入方法依賴的package包/類
@Test
public void shouldRemoveAVertexFromAnIndex() {
    final TinkerGraph g = TinkerGraph.open();
    g.createIndex("name", Vertex.class);

    g.addVertex("name", "marko", "age", 29);
    g.addVertex("name", "stephen", "age", 35);
    final Vertex v = g.addVertex("name", "stephen", "age", 35);

    // a tricky way to evaluate if indices are actually being used is to pass a fake BiPredicate to has()
    // to get into the Pipeline and evaluate what's going through it.  in this case, we know that at index
    // is used because only "stephen" ages should pass through the pipeline due to the inclusion of the
    // key index lookup on "name".  If there's an age of something other than 35 in the pipeline being evaluated
    // then something is wrong.
    assertEquals(new Long(2), g.traversal().V().has("age", P.test((t, u) -> {
        assertEquals(35, t);
        return true;
    }, 35)).has("name", "stephen").count().next());

    v.remove();
    assertEquals(new Long(1), g.traversal().V().has("age", P.test((t, u) -> {
        assertEquals(35, t);
        return true;
    }, 35)).has("name", "stephen").count().next());
}
 

import org.apache.tinkerpop.gremlin.structure.Vertex; //導入方法依賴的package包/類
@Test(expected = IllegalStateException.class)
public void shouldNotAddEdgeToAVertexThatWasRemoved() {
    final TinkerGraph graph = TinkerGraph.open();
    final Vertex v = graph.addVertex();
    v.property("name", "stephen");

    assertEquals("stephen", v.value("name"));
    v.remove();
    v.addEdge("self", v);
}
 

import org.apache.tinkerpop.gremlin.structure.Vertex; //導入方法依賴的package包/類
@Test(expected = IllegalStateException.class)
public void shouldNotModifyAVertexThatWasRemoved() {
    final TinkerGraph graph = TinkerGraph.open();
    final Vertex v = graph.addVertex();
    v.property("name", "stephen");

    assertEquals("stephen", v.value("name"));
    v.remove();

    v.property("status", 1);
}
 

import org.apache.tinkerpop.gremlin.structure.Vertex; //導入方法依賴的package包/類
@Test(expected = IllegalStateException.class)
public void shouldNotReadValueOfPropertyOnVertexThatWasRemoved() {
    final TinkerGraph graph = TinkerGraph.open();
    final Vertex v = graph.addVertex();
    v.property("name", "stephen");

    assertEquals("stephen", v.value("name"));
    v.remove();
    v.value("name");
}
 

import org.apache.tinkerpop.gremlin.structure.Vertex; //導入方法依賴的package包/類
private void deleteVertex(final Vertex toDelete) {
    valueIndex.remove(toDelete);
    toDelete.remove();
}
 

import org.apache.tinkerpop.gremlin.structure.Vertex; //導入方法依賴的package包/類
private void removeVertex(Graph graph, Vertex vertex) {
	vertex.remove();
}
 

import org.apache.tinkerpop.gremlin.structure.Vertex; //導入方法依賴的package包/類
public void testLargeDegreePerformance() {
    long ts = System.currentTimeMillis();

    Vertex one = graph.addVertex();
    one.property("one", "1");
    Object oneId = one.id();

    int numVertices = 10000; // 1000000;
    Object[] vids = new Object[numVertices];
    for (int i = 0; i < numVertices; i++) { // Change to 1M for perf
        Vertex many = graph.addVertex();
        many.property("many", "2");
        addEdge(graph, one, many, "toMany");
        vids[i] = many.id();

        if (i % 1000 == 0) {
            System.out.println(i + " 1000 in " + (System.currentTimeMillis() - ts));
            ts = System.currentTimeMillis();

            graph.tx().commit();
            one = graph.vertices(oneId).next();
        }
    }
    
    for (int i=0; i < numVertices; i++) {
        Vertex v = getVertex(graph, vids[i]);

        Iterator<Edge> iter = v.edges(Direction.BOTH);
        assertTrue(iter.hasNext());
        iter.next();
        assertFalse(iter.hasNext());

        v.remove();

        if (i % 1000 == 0) {
            System.out.println(i + " 1000 in " + (System.currentTimeMillis() - ts));
            
            if (i % 5000 == 0) {
                Iterator<Edge> iter2 = getVertex(graph, one.id()).edges(Direction.BOTH);
                for (int j=0; j < numVertices - i - 1; j++) {
                    assertTrue(iter2.hasNext());
                    iter2.next();
                }
                assertFalse(iter.hasNext());
            }
            
            ts = System.currentTimeMillis();

            graph.tx().commit();
        }
    }

    graph.tx().commit();
}
 

import org.apache.tinkerpop.gremlin.structure.Vertex; //導入方法依賴的package包/類
public void testObsolescence() {
    IGraphStore store = ((BitsyGraph)graph).getStore();
    
    // Create a vertex
    Vertex v = graph.addVertex();
    Object vid = v.id();
    v.property("foo", "bar");
    
    // Self edge
    Edge e = v.addEdge("self", v);
    Object eid = e.id();
    
    graph.tx().commit();

    Record v1MRec = new Record(RecordType.V, "{\"id\":\"" + vid + "\",\"v\":1,\"s\":\"M\"}");
    assertFalse(v1MRec.checkObsolete(store, false, 1, null));
    assertFalse(v1MRec.checkObsolete(store, true, 1, null));

    Record e1MRec = new Record(RecordType.E, "{\"id\":\"" + eid + "\",\"v\":1,\"s\":\"M\",\"o\":\"" + vid + "\",\"l\":\"" + vid + "\",\"i\":\"" + vid + "\"}");
    assertFalse(e1MRec.checkObsolete(store, false, 1, null));
    assertFalse(e1MRec.checkObsolete(store, true, 1, null));

    // Create a vertex
    v = graph.vertices(vid).next();
    v.property("foo", "baz");

    e = v.edges(Direction.IN, "self").next();
    e.property("foo", "baz");

    graph.tx().commit();

    Record v2MRec = new Record(RecordType.V, "{\"id\":\"" + vid + "\",\"v\":2,\"s\":\"M\"}");
    Record v1DRec = new Record(RecordType.V, "{\"id\":\"" + vid + "\",\"v\":1,\"s\":\"D\"}");
    
    assertTrue(v1MRec.checkObsolete(store, false, 1, null));
    assertTrue(v1MRec.checkObsolete(store, true, 1, null));

    assertFalse(v1DRec.checkObsolete(store, false, 1, null));
    assertTrue(v1DRec.checkObsolete(store, true, 1, null));

    assertFalse(v2MRec.checkObsolete(store, false, 1, null));
    assertFalse(v2MRec.checkObsolete(store, true, 1, null));

    Record e2MRec = new Record(RecordType.E, "{\"id\":\"" + eid + "\",\"v\":2,\"s\":\"M\",\"o\":\"" + vid + "\",\"l\":\"" + vid + "\",\"i\":\"" + vid + "\"}");
    Record e1DRec = new Record(RecordType.E, "{\"id\":\"" + eid + "\",\"v\":1,\"s\":\"D\",\"o\":\"" + vid + "\",\"l\":\"" + vid + "\",\"i\":\"" + vid + "\"}");
    
    assertTrue(e1MRec.checkObsolete(store, false, 1, null));
    assertTrue(e1MRec.checkObsolete(store, true, 1, null));

    assertFalse(e1DRec.checkObsolete(store, false, 1, null));
    assertTrue(e1DRec.checkObsolete(store, true, 1, null));

    assertFalse(e2MRec.checkObsolete(store, false, 1, null));
    assertFalse(e2MRec.checkObsolete(store, true, 1, null));

    // Delete vertex
    v = graph.vertices(vid).next();
    v.remove();

    // Edge will get deleted automatically!
    
    graph.tx().commit();
    
    Record v2DRec = new Record(RecordType.V, "{\"id\":\"" + vid + "\",\"v\":1,\"s\":\"D\"}");
    assertFalse(v2DRec.checkObsolete(store, false, 1, null));
    assertTrue(v2DRec.checkObsolete(store, true, 1, null));
}