Question

I have been trying to build the example GetAll neo4j server extension, but unfortunately I cannot make it work. I installed the Windows version of neo4j and run it as a server. I also installed Python neo4jrestclient and I am accessing neo4j through Python scripts. The following works fine: from neo4jrestclient.client import GraphDatabase gdb = GraphDatabase("http://localhost:7474/db/data/") print gdb.extensions

It gives me "CypherPlugin" and "GremlinPlugin". I want to build the example GetAll server extension, which is Java. I am using Eclipse. I am able to create the jar file in the folder "c: eo4j_installation_root eo4j-community-1.7pluginsGetAll.jar", but when I restart the neo4j server and run the neo4jrestclient it does not show the GetAll server extension. I searched a lot, but in vain. I have lots of experience with C++ and Python, but new to Java. I will really appreciate some help to be able to build neo4j server extensions. It is critically important for my evaluation of neo4j.

Answer 1

您是否确定有一个 META- INF/ services 等列表列出插件类, 罐头文件是用中间二人创建的( 这在 Eclipse 导出设置中不是默认的), 使 dirs 被分类加载器看到?

请查看 http://docs.neo4j.org/chunked/snapshot/server-plugins.html

Answer 2

您可以使用 Bulbs (http://bulbflow.com ) 来获得全套服务, 而不建立扩展名 :

>>> from bulbs.neo4jserver import Graph
>>> g = Graph()
>>> g.vertices.get_all()
>>> g.edges.get_all()

自定义模式工作方式相同:

# people.py

from bulbs.model import Node, Relationship
from bulbs.property import String, Integer, DateTime
from bulbs.utils import current_datetime

class Person(Node):

    element_type = "person"

    name = String(nullable=False)
    age = Integer()


class Knows(Relationship):

    label = "knows"

    created = DateTime(default=current_datetime, nullable=False)

然后给模型代理者打电话:

>>> from people import Person, Knows
>>> from bulbs.neo4jserver import Graph

>>> g = Graph()
>>> g.add_proxy("people", Person)
>>> g.add_proxy("knows", Knows)

>>> james = g.people.create(name="James")
>>> julie = g.people.create(name="Julie")
>>> g.knows.create(james, julie)

>>> g.people.get_all()
>>> g.knows.get_all()

友情链接