但索引状态已安装,如何将状态更改为已注册然后禁用它以将其删除请帮助我,
GraphTraversalSource g = janusGraph.traversal();
JanusGraphManagement janusGraphManagement = janusGraph.openManagement();
JanusGraphIndex phoneIndex =
janusGraphManagement.getGraphIndex("phoneIndex");
PropertyKey phone = janusGraphManagement.getPropertyKey("phone");
SchemaStatus indexStatus = phoneIndex.getIndexStatus(phone);
String name = phoneIndex.name();
System.out.println(name);
if (indexStatus == INSTALLED) {
janusGraphManagement.commit();
janusGraph.tx().commit();
最佳答案
如果您无法将索引的状态从 Install 更改为 Enable,我建议您检查 JanusGraph 的运行实例并关闭除带有“(Current)”的实例之外的所有实例,然后再次尝试删除索引。
要检查和关闭实例,请在 gremlin shell 中使用以下命令:
mgmt = graph.openManagement()
mgmt.getOpenInstances() //all open instances
==>7f0001016161-dunwich1(current)
==>7f0001016161-atlantis1
mgmt.forceCloseInstance('7f0001016161-atlantis1') //remove an instance
mgmt.commit()
要删除索引,请使用以下代码:
// Disable the "name" composite index
this.management = this.graph.openManagement()
def nameIndex = this.management.getGraphIndex(indexName)
this.management.updateIndex(nameIndex, SchemaAction.DISABLE_INDEX).get()
this.management.commit()
this.graph.tx().commit()
// Block until the SchemaStatus transitions from INSTALLED to REGISTERED
ManagementSystem.awaitGraphIndexStatus(graph, indexName).status(SchemaStatus.DISABLED).call()
// Delete the index using JanusGraphManagement
this.management = this.graph.openManagement()
def delIndex = this.management.getGraphIndex(indexName)
def future = this.management.updateIndex(delIndex, SchemaAction.REMOVE_INDEX)
this.management.commit()
this.graph.tx().commit()
我遇到了同样的问题并尝试了很多其他的东西,最后上面的过程成功了!
关于titan - 如何删除 JanusGraph 索引?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45273709/