这是修复方法。
PropertyKey propertyKey = janusGraphManagement.getOrCreatePropertyKey("_id");
2023-05-09 08:46:38,617 [INFO] [c.d.o.d.i.c.ContactPoints.main] :: Contact point localhost:9042 resolves to multiple addresses, will use them all ([localhost/127.0.0.1, localhost/0:0:0:0:0:0:0:1])
2023-05-09 08:46:38,689 [INFO] [c.d.o.d.i.c.DefaultMavenCoordinates.main] :: DataStax Java driver for Apache Cassandra(R) (com.datastax.oss:java-driver-core) version 4.15.0
2023-05-09 08:46:39,124 [INFO] [c.d.o.d.i.c.t.Clock.JanusGraph Session-admin-0] :: Using native clock for microsecond precision
2023-05-09 08:46:39,385 [WARN] [c.d.o.d.i.c.l.h.OptionalLocalDcHelper.JanusGraph Session-admin-0] :: [JanusGraph Session|default] You specified datacenter1 as the local DC, but some contact points are from a different DC: Node(endPoint=localhost/[0:0:0:0:0:0:0:1]:9042, hostId=null, hashCode=7b9f753a)=null; please provide the correct local DC, or check your contact points
2023-05-09 08:46:39,610 [INFO] [o.j.g.i.UniqueInstanceIdRetriever.main] :: Generated unique-instance-id=c0a8563c11168-rmt-lap-win201
2023-05-09 08:46:39,625 [INFO] [c.d.o.d.i.c.ContactPoints.main] :: Contact point localhost:9042 resolves to multiple addresses, will use them all ([localhost/127.0.0.1, localhost/0:0:0:0:0:0:0:1])
2023-05-09 08:46:39,651 [INFO] [c.d.o.d.i.c.t.Clock.JanusGraph Session-admin-0] :: Using native clock for microsecond precision
2023-05-09 08:46:39,693 [WARN] [c.d.o.d.i.c.l.h.OptionalLocalDcHelper.JanusGraph Session-admin-0] :: [JanusGraph Session|default] You specified datacenter1 as the local DC, but some contact points are from a different DC: Node(endPoint=localhost/[0:0:0:0:0:0:0:1]:9042, hostId=null, hashCode=1ce6602a)=null; please provide the correct local DC, or check your contact points
2023-05-09 08:46:39,707 [INFO] [o.j.d.c.ExecutorServiceBuilder.main] :: Initiated fixed thread pool of size 40
2023-05-09 08:46:39,818 [INFO] [o.j.g.d.StandardJanusGraph.main] :: Gremlin script evaluation is disabled
2023-05-09 08:46:39,844 [INFO] [o.j.d.l.k.KCVSLog.main] :: Loaded unidentified ReadMarker start time 2023-05-09T13:46:39.844155Z into org.janusgraph.diskstorage.log.kcvs.KCVSLog$MessagePuller@ff23ae7
Process finished with exit code 0
可能没有任何JanusGraphManagement方法就像set(), create(), insert(), make(), or add()对于新的PropertyKeys。但是，他们将获取和创造结合在一起，就像制作一个SQL SELECT-or-CREATE/INSERT or a Java Getter-and-Setter作为一种方法。
发现并意识到这一点让我陷入了困境。
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.janusgraph.core.JanusGraph;
import org.janusgraph.core.JanusGraphFactory;
import org.janusgraph.core.PropertyKey;
import org.janusgraph.core.schema.JanusGraphManagement;
public class Main {
public static void main(String[] args) {
JanusGraph janusGraph = JanusGraphFactory.build().set("storage.backend", "cql").set("storage.hostname", "localhost:9042").open();
JanusGraphManagement janusGraphManagement = janusGraph.openManagement();
PropertyKey propertyKey = janusGraphManagement.getOrCreatePropertyKey("_id");
janusGraphManagement.buildIndex("_id", Vertex.class).addKey(propertyKey).buildCompositeIndex();
janusGraphManagement.commit();
janusGraph.close();
}
}
