7.1 Gremlin

7.1.1 向HugeGraphServer发送gremlin语句(GET),同步执行

Params
  • gremlin: 要发送给HugeGraphServer执行的gremlin语句
  • bindings: 可以给gremlin语句中的变量绑定值
  • language: 发送语句的语言类型,默认为gremlin-groovy
  • aliases: 为存在于图空间的已有变量添加别名

查询顶点

Method & Url
GET http://127.0.0.1:8080/gremlin?gremlin=hugegraph.traversal().V('1:marko')
Response Status
200
Response Body
{
    "requestId": "c6ef47a8-b634-4b07-9d38-6b3b69a3a556",
    "status": {
        "message": "",
        "code": 200,
        "attributes": {}
    },
    "result": {
        "data": [{
            "id": "1:marko",
            "label": "person",
            "type": "vertex",
            "properties": {
                "city": [{
                    "id": "1:marko>city",
                    "value": "Beijing"
                }],
                "name": [{
                    "id": "1:marko>name",
                    "value": "marko"
                }],
                "age": [{
                    "id": "1:marko>age",
                    "value": 29
                }]
            }
        }],
        "meta": {}
    }
}

7.1.2 向HugeGraphServer发送gremlin语句(POST),同步执行

Method & Url
POST http://localhost:8080/gremlin

查询顶点

Request Body
{
    "gremlin": "hugegraph.traversal().V('1:marko')",
    "bindings": {},
    "language": "gremlin-groovy",
    "aliases": {}
}
Response Status
200
Response Body
{
    "requestId": "c6ef47a8-b634-4b07-9d38-6b3b69a3a556",
    "status": {
        "message": "",
        "code": 200,
        "attributes": {}
    },
    "result": {
        "data": [{
            "id": "1:marko",
            "label": "person",
            "type": "vertex",
            "properties": {
                "city": [{
                    "id": "1:marko>city",
                    "value": "Beijing"
                }],
                "name": [{
                    "id": "1:marko>name",
                    "value": "marko"
                }],
                "age": [{
                    "id": "1:marko>age",
                    "value": 29
                }]
            }
        }],
        "meta": {}
    }
}

注意:

这里是直接使用图对象(hugegraph),先获取其遍历器(traversal()),再获取顶点。 不能直接写成graph.traversal().V()g.V(),可以通过"aliases": {"graph": "hugegraph", "g": "__g_hugegraph"} 为图和遍历器添加别名后使用别名操作。其中,hugegraph是原生存在的变量,__g_hugegraphHugeGraphServer额外添加的变量, 每个图都会存在一个对应的这样格式(_g${graph})的遍历器对象。

响应体的结构与其他 Vertex 或 Edge 的 Restful API的结构有区别,用户可能需要自行解析。

查询边

Request Body
{
    "gremlin": "g.E('S1:marko>2>>S2:lop')",
    "bindings": {},
    "language": "gremlin-groovy",
    "aliases": {
        "graph": "hugegraph", 
        "g": "__g_hugegraph"
    }
}
Response Status
200
Response Body
{
    "requestId": "3f117cd4-eedc-4e08-a106-ee01d7bb8249",
    "status": {
        "message": "",
        "code": 200,
        "attributes": {}
    },
    "result": {
        "data": [{
            "id": "S1:marko>2>>S2:lop",
            "label": "created",
            "type": "edge",
            "inVLabel": "software",
            "outVLabel": "person",
            "inV": "2:lop",
            "outV": "1:marko",
            "properties": {
                "weight": 0.4,
                "date": "20171210"
            }
        }],
        "meta": {}
    }
}

7.1.3 向HugeGraphServer发送gremlin语句(POST),异步执行

Method & Url
POST http://localhost:8080/graphs/hugegraph/jobs/gremlin

查询顶点

Request Body
{
    "gremlin": "g.V('1:marko')",
    "bindings": {},
    "language": "gremlin-groovy",
    "aliases": {}
}

注意:

异步执行Gremlin语句暂不支持aliases,可以使用 graph 代表要操作的图,也可以直接使用图的名字, 例如 hugegraph; 另外g代表 traversal,等价于 graph.traversal() 或者 hugegraph.traversal()

Response Status
200
Response Body
{
    "task_id": 1
}

注:

可以通过GET http://localhost:8080/graphs/hugegraph/tasks/1(其中"1"是task_id)来查询异步任务的执行状态,更多异步任务RESTful API

查询边

Request Body
{
    "gremlin": "g.E('S1:marko>2>>S2:lop')",
    "bindings": {},
    "language": "gremlin-groovy",
    "aliases": {}
}
Response Status
200
Response Body
{
    "task_id": 2
}

注:

可以通过GET http://localhost:8080/graphs/hugegraph/tasks/2(其中"2"是task_id)来查询异步任务的执行状态,更多异步任务RESTful API

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