在带有蓝图/Tinkerpop的OrientDb中创建边缘的问题 [英] Issue with creating edge in OrientDb with Blueprints / Tinkerpop
问题描述
我最近正在尝试学习OrientDb，现在我对OrientDb控制台本身有些熟悉，因此我将继续使用Blueprints编写一个简单的Java程序来创建图形.我试图在它们之间创建一些顶点和边，但是尽管成功创建了我的顶点，但除非调用两次创建方法，否则我将看不到边.如果我注释掉其中一个调用，则不会创建任何边缘.我尝试通过增加睡眠时间来检查任何计时问题，但似乎无济于事.
I am recently trying to learn OrientDb and now that I am somewhat familiar with the OrientDb console itself I am moving on to using Blueprints to write a simple java program to create a graph. I am trying to create a few vertices and edges between them, but although my vertices are created successfully, I am unable to see my edges unless I call the method for creation twice. If I comment out one of the calls, none of the edges are being created. I tried checking for any timing issues by adding sleep times, but nothing seems to help.
我尝试使用控制台进行检查，但看到了创建的顶点，但没有看到边缘.我正在为Orient运行1.7 rc-1.
I tried to check using the console and I see the vertices created but not the edges. I am running 1.7 rc-1 for orient.
这是我要开始工作的示例代码:
Here is the sample code I am trying to get working:
public class OrientPrototype {
static OrientGraph graph = new OrientGraph("remote:localhost/Tinker", "admin", "admin");
public static void main( String[] args ) {
removeAllExistingVerticesAndEdges();
createSimpleGraph();
displayAllVertices(getAllVertices("Person"), "name");
displayAllEdges(getAllEdges("Friend"));
}
private static void removeAllExistingVerticesAndEdges() {
for (Vertex v : graph.getVertices())
v.remove();
for (Edge e : graph.getEdges())
e.remove();
}
private static void createSimpleGraph() throws InterruptedException {
createPersons();
createFriendships();
//createFriendships();
}
private static void createPersons() {
String [] persons = {"John", "Jack", "Ryan"};
if (graph.getVertexType("Person") == null)
graph.createVertexType("Person");
for (int i = 0; i < persons.length; i++) {
try {
Vertex v = graph.addVertex("class:Person");
v.setProperty("name", persons[i]);
graph.commit();
}
catch (Exception e) {
graph.rollback();
System.out.println("Error while creating the persons. Had to roll back");
}
}
System.out.println("Done creating vertices...");
}
private static void createFriendships() {
if (graph.getEdgeType("Friend") == null) {
graph.createEdgeType("Friend");
graph.commit();
}
Map<String, Vertex> vertices = new HashMap<String, Vertex>();
for (Vertex v : graph.getVertices())
vertices.put(v.getProperty("name").toString(), v);
try {
graph.addEdge("class:Friend", vertices.get("John"), vertices.get("Jack"), "is friend");
graph.addEdge("class:Friend", vertices.get("Jack"), vertices.get("Ryan"), "is friend");
graph.addEdge("class:Friend", vertices.get("Ryan"), vertices.get("John"), "is friend");
graph.commit();
System.out.println("Done creating edges...");
}
catch (Exception e) {
graph.rollback();
System.out.println("Error while creating the edges between persons. Had to roll back");
}
}
private static Iterable<Vertex> getAllVertices(String classname) {
return graph.getVerticesOfClass(classname);
}
private static void displayAllVertices(Iterable<Vertex> it, String propertyName) {
System.out.println("The vertices in the graph are:");
for (Vertex v: it)
System.out.println(v + " " + v.getProperty("name"));
}
private static Iterable<Edge> getAllEdges(String classname) {
return graph.getEdgesOfClass(classname);
}
private static void displayAllEdges(Iterable<Edge> it) {
System.out.println("The edges in the graph are:");
for (Edge e: it)
System.out.println(e);
}
}
我不认为自己做错了什么，因为当我查看OrientDb的控制台时，当我单次调用createEdge方法时，在Friend类的架构"选项卡中没有看到任何Edge吗?但是，这些确实会在第二个呼叫之后出现.此外，当我在Person类上运行Person查询中的select时，我还会看到到Person类的传入和传出链接.这些传入和传出链接仅在我至少调用一次createEdge方法时出现.
I do not believe that I am doing something wrong because when I look at the console for OrientDb, I do not see any Edges in the Schema tab for class Friend when I make the single call to createEdge method? These do appear however after the second call. Moreover I also see the incoming and outgoing links to the Person class when I run a select from Person query on the Person class. These incoming and outgoing links appear only when I call the createEdge method at least once.
任何帮助将不胜感激.如果有帮助，还可以附加我的maven pom文件中的依赖项:
Any help is greatly appreciated. Also attaching the dependencies from my maven pom file if it is of any help:
<dependencies>
<dependency>
<groupId>com.tinkerpop.blueprints</groupId>
<artifactId>blueprints-orient-graph</artifactId>
<version>2.5.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.tinkerpop.gremlin</groupId>
<artifactId>gremlin-java</artifactId>
<version>2.5.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.orientechnologies</groupId>
<artifactId>orient-commons</artifactId>
<version>1.7-rc1</version>
</dependency>
<dependency>
<groupId>com.orientechnologies</groupId>
<artifactId>orientdb-core</artifactId>
<version>1.7-rc1</version>
</dependency>
<dependency>
<groupId>com.orientechnologies</groupId>
<artifactId>orientdb-client</artifactId>
<version>1.7-rc1</version>
</dependency>
<dependency>
<groupId>com.orientechnologies</groupId>
<artifactId>orientdb-object</artifactId>
<version>1.7-rc1</version>
</dependency>
<dependency>
<groupId>com.orientechnologies</groupId>
<artifactId>orientdb-enterprise</artifactId>
<version>1.7-rc1</version>
</dependency>
</dependencies>
推荐答案
只需在此处绑上松散的末端...在gremlin-users邮件列表中回答:
Just tying up loose ends here...answered in the gremlin-users mailing list:
https://groups.google.com/forum/#！ topic/gremlin-users/xUNeuJkPyUo
给出卢卡的回应的基本摘要...首先关闭轻巧的边缘:
Basic summary given Luca's response...First turn off lightweight edges:
alter database custom useLightweightEdges=false
然后确保使用较新的OrientDB依赖项:
Then make sure to use the newer OrientDB dependency:
<dependency>
<groupId>com.orientechnologies</groupId>
<artifactId>orientdb-graphdb</artifactId>
<version>1.7-rc1</version>
</dependency>
这篇关于在带有蓝图/Tinkerpop的OrientDb中创建边缘的问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
