图数据库schema

tinkerpop

1. 需求

1. 提交一个schema。

   • schema 的id在图中已经存在，如果schema不存在，怎返回错误。

2. 更新一个schema。（现在只能添加顶点和边标签、属性）

3. schema 转换成 scripts。

2. API设计

2.1 schema转换成script

2.1.1 定义

• method : POST
• address: /api/schema/script/:gid
• parameter1: 参数名：schema ；类型：String；格式：json。
• return: 将schema转换后script脚本。

2.1.2 示例

提交参数：

{
  "vertexlabels": [
    {
      "name": "person",
      "ttl": 0
    },
    {
      "name": "god",
      "ttl": 0
    }
  ],
  "edgelabels": [
    {
      "name": "create",
      "ttl": 0,
      "multiplicity": "MANY2ONE"
    },
    {
      "name": "knows",
      "ttl": 313410,
      "multiplicity": "MULTI"
    }
  ],
  "propertykeys": [
    {
      "cardinality": "SINGLE",
      "datatype": "String",
      "name": "name",
      "ttl": 0,
      "order": true
    },
    {
      "cardinality": "SET",
      "datatype": "String",
      "name": "age",
      "ttl": 324,
      "order": true
    }
  ]
}

返回结果：

mgmt = graph.openManagement()
HPvmYa = mgmt.makeVertexLabel('person').make()
kAOqFO = mgmt.makeVertexLabel('god').make()
jtJyjt = mgmt.makeEdgeLabel('create').multiplicity(MANY2ONE).make()
QEsVNf = mgmt.makeEdgeLabel('knows').multiplicity(MULTI).make()
mgmt.setTTL(QEsVNf, Duration.ofSeconds(313,410))
ckYTXj = mgmt.makePropertyKey('name').cardinality(Cardinality.SINGLE).dataType(String.class).make()
LKOays = mgmt.makePropertyKey('age').cardinality(Cardinality.SET).dataType(String.class).make()
mgmt.setTTL(LKOays, Duration.ofSeconds(324))
mgmt.commit()

2.2 根据id获取一个schema

2.2.1 定义

• method : GET
• address: /api/schema/:id
• return: 将schema转换后script脚本。

2.2.2 举例

请求：

/api/schema/schema-001231

返回：

{
  "vertexlabels": [
    {
      "name": "person",
      "ttl": 0
    },
    {
      "name": "god",
      "ttl": 0
    }
  ],
  "edgelabels": [
    {
      "name": "create",
      "ttl": 0,
      "multiplicity": "MANY2ONE"
    },
    {
      "name": "knows",
      "ttl": 313410,
      "multiplicity": "MULTI"
    }
  ],
  "propertykeys": [
    {
      "cardinality": "SINGLE",
      "datatype": "String",
      "name": "name",
      "ttl": 0,
      "order": true
    },
    {
      "cardinality": "SET",
      "datatype": "String",
      "name": "age",
      "ttl": 324,
      "order": true
    }
  ]
}

2.3 更新schema

2.3.1 定义

• method : POST
• address: /api/schema/:id
• parameter1: 参数名：schema；类型：String；格式：json。
• return: 合并后json格式的schema定义。

2.3.2 举例

/api/schema/schema-001231
请求参数：

{
  "vertexlabels": [
    {
      "name": "Hemigod",
      "ttl": 0
    },
    {
      "name": "god",
      "ttl": 0
    }
  ],
  "edgelabels": [
    {
      "name": "knows",
      "ttl": 313410,
      "multiplicity": "MULTI"
    }
  ],
  "propertykeys": [
    {
      "cardinality": "SET",
      "datatype": "String",
      "name": "age",
      "ttl": 324,
      "order": true
    }
  ]
}

返回结果

{
  "vertexlabels": [
    {
      "name": "person",
      "ttl": 0
    },
    {
      "name": "Hemigod",
      "ttl": 0
    },
    {
      "name": "god",
      "ttl": 0
    }
  ],
  "edgelabels": [
    {
      "name": "create",
      "ttl": 0,
      "multiplicity": "MANY2ONE"
    },
    {
      "name": "knows",
      "ttl": 313410,
      "multiplicity": "MULTI"
    }
  ],
  "propertykeys": [
    {
      "cardinality": "SINGLE",
      "datatype": "String",
      "name": "name",
      "ttl": 0,
      "order": true
    },
    {
      "cardinality": "SET",
      "datatype": "String",
      "name": "age",
      "ttl": 324,
      "order": true
    }
  ]
}