# pandora-graph

**Repository Path**: ali88888/pandora-graph

## Basic Information

- **Project Name**: pandora-graph
- **Description**: 知识图谱-java后端，功能：建图schema、导入/查询图数据、多阶推演
JanusGraph+Cassandra+ES+docker，使用docker-compose编排
- **Primary Language**: Java
- **License**: Apache-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 6
- **Forks**: 1
- **Created**: 2020-09-04
- **Last Updated**: 2024-03-10

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# pandora-graph

由于JanusGraph支持不同的存储后端和索引后端，所以安装方式也有几种：

   1、 JanusGraph+Berkeley+ES：主要用于小型环境

   2、JanusGraph+Cassandra+ES：适用于无Hadoop环境

   3、JanusGraph+HBase+ES：适用于与Hadoop集成的环境

docker更换镜像源
首先在Mac的docker的配置中找到 Daemon 选项卡，点击 Registry mirrors 栏左下角的 + 添加一条https://docker.mirrors.ustc.edu.cn

1.编写docker-compose文件

2.构建
```
docker-compose  -f docker-compose-graph.yml up -d
```
在指定固定ip时，如果提示如下错误
```
 User specified IP address is supported only when connecting to networks with user configured subnets
```
则需要创建subnet网络
```
docker network create --driver bridge --subnet 192.168.12.0/24 graph
```
查看创建好的网络
```html
docker network inspect graph
```
参考说明
```html
https://www.it610.com/article/1279550509954383872.htm
```

3.运行项目代码
TODO 待完善

4.相关文档
```html
https://blog.csdn.net/zg_hover/article/details/89381150
```

查看索引概述
```
http://127.0.0.1:9200/_cat/indices?v
```

注意事项：先新增实体，再新增边，因为实体加到图数据库里需要时间，新增边时需要查询源点和目标点，如果其中一点不存在则加边失败

图管理方法的官方文档
```
https://docs.janusgraph.org/basics/configured-graph-factory/
```


------------------------------------
问题记录

问题1：删除图时报错
```
java.lang.NullPointerException: Gremlin Server must be configured to use the JanusGraphManager.
```

问题2：更换为动态创建图时报错
客户端报错：
```
org.janusgraph.graphdb.management.utils.ConfigurationManagementGraphNotEnabledException: Please add a key named "ConfigurationManagementGraph" to the "graphs" property in your YAML file and restart the server to be able to use the functionality of the ConfigurationManagementGraph class.
```
解决方式：暂时未解决
服务端报错：
```
Graph [ConfigurationManagementGraph] configured at [/etc/opt/janusgraph/janusgraph.properties] could not be instantiated and will not be available in Gremlin Server.
```
解决方式：从janusgraph服务端的gramlin-cassdra-configration.yaml配置文件里拷贝写法-->
```
GraphFactory can only instantiate Graph implementations from classes that have a static open() method that takes a single Apache Commons Configuration argument - [class org.janusgraph.core.ConfiguredGraphFactory] does not seem to have one
```
问题3：janusgraph服务端报错
```
Could not invoke constructor on class org.janusgraph.graphdb.management.JanusGraphManager (defined by the 'graphManager' setting) with one argument of class Settings
```

问题4：gremlin-server.yaml中graphs节点里把图名改了之后，建图schema成功，但获取g出错
```
The traversal source [g] for alias [g] is not configured on the server.
```