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Nebula Go

Nebula Go是一款Go语言的客户端,可以连接、管理Nebula Graph图数据库。

前提条件

已安装Go,版本为1.13及以上。

版本对照表

Nebula Graph版本 Nebula Go版本
2.5.0 2.5.0
2.0.1 2.0.0-GA
2.0.0 2.0.0-GA

下载Nebula Go

  • (推荐)如果需要下载指定版本的Nebula Go,请使用选项--branch指定分支。例如安装v2.5.0发布版本,请执行如下命令:

    $ git clone --branch v2.5.0 https://github.com/vesoft-inc/nebula-go.git
    
  • 如果需要安装日常开发版本,请执行如下命令下载master分支的源码:

    $ git clone https://github.com/vesoft-inc/nebula-go.git
    

安装或更新

安装或更新的命令如下:

$ go get -u -v github.com/vesoft-inc/nebula-go@<tag>

tag:指定分支。例如masterv2.5.0

核心代码

详细示例请参见graph_client_basic_examplegraph_client_goroutines_example

const (
    address = "192.168.xx.1"
    port     = 9669
    username = "root"
    password = "nebula"
)

func main() {
    hostAddress := nebula.HostAddress{Host: address, Port: port}
    hostList := []nebula.HostAddress{hostAddress}
    testPoolConfig := nebula.GetDefaultConf()
    pool, err := nebula.NewConnectionPool(hostList, testPoolConfig, log)
    defer pool.Close()
    session, err := pool.GetSession(username, password)
    defer session.Release()

    checkResultSet := func(prefix string, res *nebula.ResultSet) {
        if !res.IsSucceed() {
            log.Fatal(fmt.Sprintf("%s, ErrorCode: %v, ErrorMsg: %s", prefix, res.GetErrorCode(), res.GetErrorMsg()))
        }
    }
    {
        createSchema := "CREATE SPACE IF NOT EXISTS basic_example_space(vid_type=FIXED_STRING(20)); " +
            "USE basic_example_space;" +
            "CREATE TAG IF NOT EXISTS person(name string, age int);" +
            "CREATE EDGE IF NOT EXISTS like(likeness double)"
        resultSet, err := session.Execute(createSchema)
        checkResultSet(createSchema, resultSet)
    }
    fmt.Print("\n")
    log.Info("Nebula Go Client Basic Example Finished")
}

最后更新: August 30, 2021
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