neo4j嵌入式scala示例插入节点

Question

I've been able to run the neo4j scala example using the batch insert with no problems. However, when I try to create Nodes without the unsafe batch inserter, I get no errors but no inserts either.

Here's the sample code

private def insertNodes(label:String, data: Iterator[Map[String, String]]) = {
    val dynLabel: Label = DynamicLabel.label(label)
    val graphDb = new GraphDatabaseFactory().newEmbeddedDatabase(DB_PATH)
    registerShutdownHook( graphDb )

    val tx = graphDb.beginTx()

      for (item <- data)  {
        val node: Node = graphDb.createNode(dynLabel)
        node.setProperty("item_id", data("item_id"))
        node.setProperty("title", data("title"))
      }

    tx.success
    graphDb.shutdown()

  }

Answer 1

You have to commit the transaction. I'm not sure the proper scala syntax, but you want something like:

val tx = graphDb.beginTx()

try {
    for (item <- data)  {
        val node: Node = graphDb.createNode(dynLabel)
        node.setProperty("item_id", data("item_id"))
        node.setProperty("title", data("title"))
    }
    tx.success
} catch {
    case e: Exception => tx.failure
} finally {
    tx.close
}