快速入门:适用于 .NET 的 Azure Cosmos DB for Apache Gremlin 库
适用对象: Gremlin
Azure Cosmos DB for Apache Gremlin 是一种完全托管的图形数据库服务,用于实现常用的 Apache Tinkerpop
(使用 Gremlin 查询语言的图形计算框架)。 API for Gremlin 为你提供了一种低摩擦方式来将 Gremlin 与服务结合使用,可通过最少的管理根据需要进行增长和横向扩展。
在本快速入门中,你会使用 Gremlin.Net
库连接到新建的 Azure Cosmos DB for Gremlin 帐户。
先决条件
- 具有活动订阅的 Azure 帐户。
- 无 Azure 订阅? 注册 Azure 帐户。
- .NET (LTS)
- 未安装 .NET? 在 GitHub Codespaces 中试用本快速入门。
- Azure 命令行接口 (CLI)
设置
本部分会引导你创建 API for Gremlin 帐户并设置 .NET 项目以使用该库连接到帐户。
创建 API for Gremlin 帐户
在使用 .NET 库之前,应先创建 API for Gremlin 帐户。 此外,建立数据库和图表也很有帮助。
为 accountName、resourceGroupName 和 location 创建 shell 变量。
# Variable for resource group name resourceGroupName="msdocs-cosmos-gremlin-quickstart" location="westus" # Variable for account name with a randomly generated suffix let suffix=$RANDOM*$RANDOM accountName="msdocs-gremlin-$suffix"
如果尚未登录到 Azure CLI,请使用
az login
登录。使用
az group create
在订阅中创建新的资源组。az group create \ --name $resourceGroupName \ --location $location
使用
az cosmosdb create
创建具有默认设置的新 API for Gremlin 帐户。az cosmosdb create \ --resource-group $resourceGroupName \ --name $accountName \ --capabilities "EnableGremlin" \ --locations regionName=$location \ --enable-free-tier true
使用
az cosmosdb show
获取帐户的 API for Gremlin 终结点 NAME。az cosmosdb show \ --resource-group $resourceGroupName \ --name $accountName \ --query "name"
使用
az-cosmosdb-keys-list
从帐户的密钥列表中查找 KEY。az cosmosdb keys list \ --resource-group $resourceGroupName \ --name $accountName \ --type "keys" \ --query "primaryMasterKey"
记录 NAME 和 KEY 的值。 稍后会使用这些凭据。
使用
az cosmosdb gremlin database create
创建名为“cosmicworks
”的数据库。az cosmosdb gremlin database create \ --resource-group $resourceGroupName \ --account-name $accountName \ --name "cosmicworks"
使用
az cosmosdb gremlin graph create
创建图形。 将图形命名为“products
”,然后将吞吐量设置为“400
”,最后将分区键路径设置为“/category
”。az cosmosdb gremlin graph create \ --resource-group $resourceGroupName \ --account-name $accountName \ --database-name "cosmicworks" \ --name "products" \ --partition-key-path "/category" \ --throughput 400
创建新的 .NET 控制台应用程序
使用首选终端在空文件夹中新建 .NET 控制台应用程序。
在空文件夹中打开终端。
使用
dotnet new
命令指定 "console" 模板。dotnet new console
安装 NuGet 包
将 Gremlin.NET
NuGet 包添加到 .NET 项目。
使用
dotnet add package
命令指定Gremlin.Net
NuGet 包。dotnet add package Gremlin.Net
使用
dotnet build
生成 .NET 项目。dotnet build
确保生成成功且没有错误。 内部版本的预期输出应如下所示:
Determining projects to restore... All projects are up-to-date for restore. dslkajfjlksd -> \dslkajfjlksd\bin\Debug\net6.0\dslkajfjlksd.dll Build succeeded. 0 Warning(s) 0 Error(s)
配置环境变量
要使用本快速入门中前面获得的 NAME 和 URI 值,请将其保存到运行应用程序的本地计算机上的新环境变量。
要设置环境变量,请使用终端将值分别保留为“
COSMOS_ENDPOINT
”和“COSMOS_KEY
”。export COSMOS_GREMLIN_ENDPOINT="<account-name>" export COSMOS_GREMLIN_KEY="<account-key>"
验证是否已正确设置环境变量。
printenv COSMOS_GREMLIN_ENDPOINT printenv COSMOS_GREMLIN_KEY
代码示例
本文中的代码连接到名为“cosmicworks
”的数据库和名为“products
”的图形。 然后,代码在遍历添加的项之前,将顶点和边缘添加到图形。
验证客户端
对大多数 Azure 服务的应用程序请求必须获得授权。 对于 API for Gremlin,请使用本快速入门前面获取的名称和 URI 值。
打开 Program.cs 文件。
删除文件中的任何现有内容。
为
Gremlin.Net.Driver
命名空间添加一个 using 块。
// <imports>
using Gremlin.Net.Driver;
// </imports>
// <environment_variables>
string accountName = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_ENDPOINT")!;
string accountKey = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_KEY")!;
// </environment_variables>
// <authenticate_client>
var server = new GremlinServer(
hostname: $"{accountName}.gremlin.cosmos.azure.cn",
port: 443,
username: "/dbs/cosmicworks/colls/products",
password: $"{accountKey}",
enableSsl: true
);
// </authenticate_client>
// <connect_client>
using var client = new GremlinClient(
gremlinServer: server,
messageSerializer: new Gremlin.Net.Structure.IO.GraphSON.GraphSON2MessageSerializer()
);
// </connect_client>
// <drop_graph>
await client.SubmitAsync(
requestScript: "g.V().drop()"
);
// </drop_graph>
// <create_vertices_1>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518371').property('name', 'Kiama classic surfboard').property('price', 285.55).property('category', 'surfboards')"
);
// </create_vertices_1>
// <create_vertices_2>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518403').property('name', 'Montau Turtle Surfboard').property('price', 600.00).property('category', 'surfboards')"
);
// </create_vertices_2>
// <create_vertices_3>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518409').property('name', 'Bondi Twin Surfboard').property('price', 585.50).property('category', 'surfboards')"
);
// </create_vertices_3>
// <create_edges_1>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518371']))"
);
// </create_edges_1>
// <create_edges_2>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518409']))"
);
// </create_edges_2>
// <query_vertices_edges>
var results = await client.SubmitAsync<Dictionary<string, object>>(
requestScript: "g.V().hasLabel('product').has('category', 'surfboards').has('name', 'Montau Turtle Surfboard').outE('replaces').inV()"
);
// </query_vertices_edges>
// <output_vertices_edges>
Console.WriteLine($"[CREATED PRODUCT]\t68719518403");
foreach (var result in results ?? Enumerable.Empty<Dictionary<string, object>>())
{
Console.WriteLine($"[REPLACES PRODUCT]\t{result["id"]}");
}
// </output_vertices_edges>
- 创建
accountName
和accountKey
字符串变量。 将COSMOS_GREMLIN_ENDPOINT
和COSMOS_GREMLIN_KEY
环境变量存储为每个相应变量的值。
// <imports>
using Gremlin.Net.Driver;
// </imports>
// <environment_variables>
string accountName = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_ENDPOINT")!;
string accountKey = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_KEY")!;
// </environment_variables>
// <authenticate_client>
var server = new GremlinServer(
hostname: $"{accountName}.gremlin.cosmos.azure.cn",
port: 443,
username: "/dbs/cosmicworks/colls/products",
password: $"{accountKey}",
enableSsl: true
);
// </authenticate_client>
// <connect_client>
using var client = new GremlinClient(
gremlinServer: server,
messageSerializer: new Gremlin.Net.Structure.IO.GraphSON.GraphSON2MessageSerializer()
);
// </connect_client>
// <drop_graph>
await client.SubmitAsync(
requestScript: "g.V().drop()"
);
// </drop_graph>
// <create_vertices_1>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518371').property('name', 'Kiama classic surfboard').property('price', 285.55).property('category', 'surfboards')"
);
// </create_vertices_1>
// <create_vertices_2>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518403').property('name', 'Montau Turtle Surfboard').property('price', 600.00).property('category', 'surfboards')"
);
// </create_vertices_2>
// <create_vertices_3>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518409').property('name', 'Bondi Twin Surfboard').property('price', 585.50).property('category', 'surfboards')"
);
// </create_vertices_3>
// <create_edges_1>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518371']))"
);
// </create_edges_1>
// <create_edges_2>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518409']))"
);
// </create_edges_2>
// <query_vertices_edges>
var results = await client.SubmitAsync<Dictionary<string, object>>(
requestScript: "g.V().hasLabel('product').has('category', 'surfboards').has('name', 'Montau Turtle Surfboard').outE('replaces').inV()"
);
// </query_vertices_edges>
// <output_vertices_edges>
Console.WriteLine($"[CREATED PRODUCT]\t68719518403");
foreach (var result in results ?? Enumerable.Empty<Dictionary<string, object>>())
{
Console.WriteLine($"[REPLACES PRODUCT]\t{result["id"]}");
}
// </output_vertices_edges>
- 使用帐户的凭据创建
GremlinServer
的新实例。
// <imports>
using Gremlin.Net.Driver;
// </imports>
// <environment_variables>
string accountName = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_ENDPOINT")!;
string accountKey = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_KEY")!;
// </environment_variables>
// <authenticate_client>
var server = new GremlinServer(
hostname: $"{accountName}.gremlin.cosmos.azure.cn",
port: 443,
username: "/dbs/cosmicworks/colls/products",
password: $"{accountKey}",
enableSsl: true
);
// </authenticate_client>
// <connect_client>
using var client = new GremlinClient(
gremlinServer: server,
messageSerializer: new Gremlin.Net.Structure.IO.GraphSON.GraphSON2MessageSerializer()
);
// </connect_client>
// <drop_graph>
await client.SubmitAsync(
requestScript: "g.V().drop()"
);
// </drop_graph>
// <create_vertices_1>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518371').property('name', 'Kiama classic surfboard').property('price', 285.55).property('category', 'surfboards')"
);
// </create_vertices_1>
// <create_vertices_2>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518403').property('name', 'Montau Turtle Surfboard').property('price', 600.00).property('category', 'surfboards')"
);
// </create_vertices_2>
// <create_vertices_3>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518409').property('name', 'Bondi Twin Surfboard').property('price', 585.50).property('category', 'surfboards')"
);
// </create_vertices_3>
// <create_edges_1>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518371']))"
);
// </create_edges_1>
// <create_edges_2>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518409']))"
);
// </create_edges_2>
// <query_vertices_edges>
var results = await client.SubmitAsync<Dictionary<string, object>>(
requestScript: "g.V().hasLabel('product').has('category', 'surfboards').has('name', 'Montau Turtle Surfboard').outE('replaces').inV()"
);
// </query_vertices_edges>
// <output_vertices_edges>
Console.WriteLine($"[CREATED PRODUCT]\t68719518403");
foreach (var result in results ?? Enumerable.Empty<Dictionary<string, object>>())
{
Console.WriteLine($"[REPLACES PRODUCT]\t{result["id"]}");
}
// </output_vertices_edges>
- 使用远程服务器凭据和 GraphSON 2.0 序列化程序创建
GremlinClient
的新实例。
// <imports>
using Gremlin.Net.Driver;
// </imports>
// <environment_variables>
string accountName = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_ENDPOINT")!;
string accountKey = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_KEY")!;
// </environment_variables>
// <authenticate_client>
var server = new GremlinServer(
hostname: $"{accountName}.gremlin.cosmos.azure.cn",
port: 443,
username: "/dbs/cosmicworks/colls/products",
password: $"{accountKey}",
enableSsl: true
);
// </authenticate_client>
// <connect_client>
using var client = new GremlinClient(
gremlinServer: server,
messageSerializer: new Gremlin.Net.Structure.IO.GraphSON.GraphSON2MessageSerializer()
);
// </connect_client>
// <drop_graph>
await client.SubmitAsync(
requestScript: "g.V().drop()"
);
// </drop_graph>
// <create_vertices_1>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518371').property('name', 'Kiama classic surfboard').property('price', 285.55).property('category', 'surfboards')"
);
// </create_vertices_1>
// <create_vertices_2>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518403').property('name', 'Montau Turtle Surfboard').property('price', 600.00).property('category', 'surfboards')"
);
// </create_vertices_2>
// <create_vertices_3>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518409').property('name', 'Bondi Twin Surfboard').property('price', 585.50).property('category', 'surfboards')"
);
// </create_vertices_3>
// <create_edges_1>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518371']))"
);
// </create_edges_1>
// <create_edges_2>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518409']))"
);
// </create_edges_2>
// <query_vertices_edges>
var results = await client.SubmitAsync<Dictionary<string, object>>(
requestScript: "g.V().hasLabel('product').has('category', 'surfboards').has('name', 'Montau Turtle Surfboard').outE('replaces').inV()"
);
// </query_vertices_edges>
// <output_vertices_edges>
Console.WriteLine($"[CREATED PRODUCT]\t68719518403");
foreach (var result in results ?? Enumerable.Empty<Dictionary<string, object>>())
{
Console.WriteLine($"[REPLACES PRODUCT]\t{result["id"]}");
}
// </output_vertices_edges>
创建顶点
现在,应用程序已连接到帐户,请使用标准 Gremlin 语法创建顶点。
使用“
SubmitAsync
”在 API for Gremlin 帐户的服务器端运行命令。 使用以下属性创建产品顶点:值 label product
id 68719518371
name
Kiama classic surfboard
price
285.55
category
surfboards
// <imports>
using Gremlin.Net.Driver;
// </imports>
// <environment_variables>
string accountName = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_ENDPOINT")!;
string accountKey = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_KEY")!;
// </environment_variables>
// <authenticate_client>
var server = new GremlinServer(
hostname: $"{accountName}.gremlin.cosmos.azure.cn",
port: 443,
username: "/dbs/cosmicworks/colls/products",
password: $"{accountKey}",
enableSsl: true
);
// </authenticate_client>
// <connect_client>
using var client = new GremlinClient(
gremlinServer: server,
messageSerializer: new Gremlin.Net.Structure.IO.GraphSON.GraphSON2MessageSerializer()
);
// </connect_client>
// <drop_graph>
await client.SubmitAsync(
requestScript: "g.V().drop()"
);
// </drop_graph>
// <create_vertices_1>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518371').property('name', 'Kiama classic surfboard').property('price', 285.55).property('category', 'surfboards')"
);
// </create_vertices_1>
// <create_vertices_2>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518403').property('name', 'Montau Turtle Surfboard').property('price', 600.00).property('category', 'surfboards')"
);
// </create_vertices_2>
// <create_vertices_3>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518409').property('name', 'Bondi Twin Surfboard').property('price', 585.50).property('category', 'surfboards')"
);
// </create_vertices_3>
// <create_edges_1>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518371']))"
);
// </create_edges_1>
// <create_edges_2>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518409']))"
);
// </create_edges_2>
// <query_vertices_edges>
var results = await client.SubmitAsync<Dictionary<string, object>>(
requestScript: "g.V().hasLabel('product').has('category', 'surfboards').has('name', 'Montau Turtle Surfboard').outE('replaces').inV()"
);
// </query_vertices_edges>
// <output_vertices_edges>
Console.WriteLine($"[CREATED PRODUCT]\t68719518403");
foreach (var result in results ?? Enumerable.Empty<Dictionary<string, object>>())
{
Console.WriteLine($"[REPLACES PRODUCT]\t{result["id"]}");
}
// </output_vertices_edges>
使用以下属性创建第二个产品顶点:
值 label product
id 68719518403
name
Montau Turtle Surfboard
price
600.00
category
surfboards
// <imports>
using Gremlin.Net.Driver;
// </imports>
// <environment_variables>
string accountName = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_ENDPOINT")!;
string accountKey = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_KEY")!;
// </environment_variables>
// <authenticate_client>
var server = new GremlinServer(
hostname: $"{accountName}.gremlin.cosmos.azure.cn",
port: 443,
username: "/dbs/cosmicworks/colls/products",
password: $"{accountKey}",
enableSsl: true
);
// </authenticate_client>
// <connect_client>
using var client = new GremlinClient(
gremlinServer: server,
messageSerializer: new Gremlin.Net.Structure.IO.GraphSON.GraphSON2MessageSerializer()
);
// </connect_client>
// <drop_graph>
await client.SubmitAsync(
requestScript: "g.V().drop()"
);
// </drop_graph>
// <create_vertices_1>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518371').property('name', 'Kiama classic surfboard').property('price', 285.55).property('category', 'surfboards')"
);
// </create_vertices_1>
// <create_vertices_2>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518403').property('name', 'Montau Turtle Surfboard').property('price', 600.00).property('category', 'surfboards')"
);
// </create_vertices_2>
// <create_vertices_3>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518409').property('name', 'Bondi Twin Surfboard').property('price', 585.50).property('category', 'surfboards')"
);
// </create_vertices_3>
// <create_edges_1>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518371']))"
);
// </create_edges_1>
// <create_edges_2>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518409']))"
);
// </create_edges_2>
// <query_vertices_edges>
var results = await client.SubmitAsync<Dictionary<string, object>>(
requestScript: "g.V().hasLabel('product').has('category', 'surfboards').has('name', 'Montau Turtle Surfboard').outE('replaces').inV()"
);
// </query_vertices_edges>
// <output_vertices_edges>
Console.WriteLine($"[CREATED PRODUCT]\t68719518403");
foreach (var result in results ?? Enumerable.Empty<Dictionary<string, object>>())
{
Console.WriteLine($"[REPLACES PRODUCT]\t{result["id"]}");
}
// </output_vertices_edges>
使用以下属性创建第三个产品顶点:
值 label product
id 68719518409
name
Bondi Twin Surfboard
price
585.50
category
surfboards
// <imports>
using Gremlin.Net.Driver;
// </imports>
// <environment_variables>
string accountName = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_ENDPOINT")!;
string accountKey = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_KEY")!;
// </environment_variables>
// <authenticate_client>
var server = new GremlinServer(
hostname: $"{accountName}.gremlin.cosmos.azure.cn",
port: 443,
username: "/dbs/cosmicworks/colls/products",
password: $"{accountKey}",
enableSsl: true
);
// </authenticate_client>
// <connect_client>
using var client = new GremlinClient(
gremlinServer: server,
messageSerializer: new Gremlin.Net.Structure.IO.GraphSON.GraphSON2MessageSerializer()
);
// </connect_client>
// <drop_graph>
await client.SubmitAsync(
requestScript: "g.V().drop()"
);
// </drop_graph>
// <create_vertices_1>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518371').property('name', 'Kiama classic surfboard').property('price', 285.55).property('category', 'surfboards')"
);
// </create_vertices_1>
// <create_vertices_2>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518403').property('name', 'Montau Turtle Surfboard').property('price', 600.00).property('category', 'surfboards')"
);
// </create_vertices_2>
// <create_vertices_3>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518409').property('name', 'Bondi Twin Surfboard').property('price', 585.50).property('category', 'surfboards')"
);
// </create_vertices_3>
// <create_edges_1>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518371']))"
);
// </create_edges_1>
// <create_edges_2>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518409']))"
);
// </create_edges_2>
// <query_vertices_edges>
var results = await client.SubmitAsync<Dictionary<string, object>>(
requestScript: "g.V().hasLabel('product').has('category', 'surfboards').has('name', 'Montau Turtle Surfboard').outE('replaces').inV()"
);
// </query_vertices_edges>
// <output_vertices_edges>
Console.WriteLine($"[CREATED PRODUCT]\t68719518403");
foreach (var result in results ?? Enumerable.Empty<Dictionary<string, object>>())
{
Console.WriteLine($"[REPLACES PRODUCT]\t{result["id"]}");
}
// </output_vertices_edges>
创建边缘
使用 Gremlin 语法创建边缘,以定义顶点之间的关系。
- 创建从名为“替换”的
Montau Turtle Surfboard
产品到Kiama classic surfboard
产品的边缘。
// <imports>
using Gremlin.Net.Driver;
// </imports>
// <environment_variables>
string accountName = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_ENDPOINT")!;
string accountKey = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_KEY")!;
// </environment_variables>
// <authenticate_client>
var server = new GremlinServer(
hostname: $"{accountName}.gremlin.cosmos.azure.cn",
port: 443,
username: "/dbs/cosmicworks/colls/products",
password: $"{accountKey}",
enableSsl: true
);
// </authenticate_client>
// <connect_client>
using var client = new GremlinClient(
gremlinServer: server,
messageSerializer: new Gremlin.Net.Structure.IO.GraphSON.GraphSON2MessageSerializer()
);
// </connect_client>
// <drop_graph>
await client.SubmitAsync(
requestScript: "g.V().drop()"
);
// </drop_graph>
// <create_vertices_1>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518371').property('name', 'Kiama classic surfboard').property('price', 285.55).property('category', 'surfboards')"
);
// </create_vertices_1>
// <create_vertices_2>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518403').property('name', 'Montau Turtle Surfboard').property('price', 600.00).property('category', 'surfboards')"
);
// </create_vertices_2>
// <create_vertices_3>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518409').property('name', 'Bondi Twin Surfboard').property('price', 585.50).property('category', 'surfboards')"
);
// </create_vertices_3>
// <create_edges_1>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518371']))"
);
// </create_edges_1>
// <create_edges_2>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518409']))"
);
// </create_edges_2>
// <query_vertices_edges>
var results = await client.SubmitAsync<Dictionary<string, object>>(
requestScript: "g.V().hasLabel('product').has('category', 'surfboards').has('name', 'Montau Turtle Surfboard').outE('replaces').inV()"
);
// </query_vertices_edges>
// <output_vertices_edges>
Console.WriteLine($"[CREATED PRODUCT]\t68719518403");
foreach (var result in results ?? Enumerable.Empty<Dictionary<string, object>>())
{
Console.WriteLine($"[REPLACES PRODUCT]\t{result["id"]}");
}
// </output_vertices_edges>
提示
此边缘定义使用 g.V(['<partition-key>', '<id>'])
语法。 或者,也可使用 g.V('<id>').has('category', '<partition-key>')
。
- 创建从同一产品到
Bondi Twin Surfboard
的另一个替换边缘。
// <imports>
using Gremlin.Net.Driver;
// </imports>
// <environment_variables>
string accountName = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_ENDPOINT")!;
string accountKey = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_KEY")!;
// </environment_variables>
// <authenticate_client>
var server = new GremlinServer(
hostname: $"{accountName}.gremlin.cosmos.azure.cn",
port: 443,
username: "/dbs/cosmicworks/colls/products",
password: $"{accountKey}",
enableSsl: true
);
// </authenticate_client>
// <connect_client>
using var client = new GremlinClient(
gremlinServer: server,
messageSerializer: new Gremlin.Net.Structure.IO.GraphSON.GraphSON2MessageSerializer()
);
// </connect_client>
// <drop_graph>
await client.SubmitAsync(
requestScript: "g.V().drop()"
);
// </drop_graph>
// <create_vertices_1>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518371').property('name', 'Kiama classic surfboard').property('price', 285.55).property('category', 'surfboards')"
);
// </create_vertices_1>
// <create_vertices_2>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518403').property('name', 'Montau Turtle Surfboard').property('price', 600.00).property('category', 'surfboards')"
);
// </create_vertices_2>
// <create_vertices_3>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518409').property('name', 'Bondi Twin Surfboard').property('price', 585.50).property('category', 'surfboards')"
);
// </create_vertices_3>
// <create_edges_1>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518371']))"
);
// </create_edges_1>
// <create_edges_2>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518409']))"
);
// </create_edges_2>
// <query_vertices_edges>
var results = await client.SubmitAsync<Dictionary<string, object>>(
requestScript: "g.V().hasLabel('product').has('category', 'surfboards').has('name', 'Montau Turtle Surfboard').outE('replaces').inV()"
);
// </query_vertices_edges>
// <output_vertices_edges>
Console.WriteLine($"[CREATED PRODUCT]\t68719518403");
foreach (var result in results ?? Enumerable.Empty<Dictionary<string, object>>())
{
Console.WriteLine($"[REPLACES PRODUCT]\t{result["id"]}");
}
// </output_vertices_edges>
查询顶点和边缘
使用 Gremlin 语法遍历图形并发现顶点之间的关系。
- 遍历图形并查找
Montau Turtle Surfboard
替换的所有顶点。
// <imports>
using Gremlin.Net.Driver;
// </imports>
// <environment_variables>
string accountName = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_ENDPOINT")!;
string accountKey = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_KEY")!;
// </environment_variables>
// <authenticate_client>
var server = new GremlinServer(
hostname: $"{accountName}.gremlin.cosmos.azure.cn",
port: 443,
username: "/dbs/cosmicworks/colls/products",
password: $"{accountKey}",
enableSsl: true
);
// </authenticate_client>
// <connect_client>
using var client = new GremlinClient(
gremlinServer: server,
messageSerializer: new Gremlin.Net.Structure.IO.GraphSON.GraphSON2MessageSerializer()
);
// </connect_client>
// <drop_graph>
await client.SubmitAsync(
requestScript: "g.V().drop()"
);
// </drop_graph>
// <create_vertices_1>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518371').property('name', 'Kiama classic surfboard').property('price', 285.55).property('category', 'surfboards')"
);
// </create_vertices_1>
// <create_vertices_2>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518403').property('name', 'Montau Turtle Surfboard').property('price', 600.00).property('category', 'surfboards')"
);
// </create_vertices_2>
// <create_vertices_3>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518409').property('name', 'Bondi Twin Surfboard').property('price', 585.50).property('category', 'surfboards')"
);
// </create_vertices_3>
// <create_edges_1>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518371']))"
);
// </create_edges_1>
// <create_edges_2>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518409']))"
);
// </create_edges_2>
// <query_vertices_edges>
var results = await client.SubmitAsync<Dictionary<string, object>>(
requestScript: "g.V().hasLabel('product').has('category', 'surfboards').has('name', 'Montau Turtle Surfboard').outE('replaces').inV()"
);
// </query_vertices_edges>
// <output_vertices_edges>
Console.WriteLine($"[CREATED PRODUCT]\t68719518403");
foreach (var result in results ?? Enumerable.Empty<Dictionary<string, object>>())
{
Console.WriteLine($"[REPLACES PRODUCT]\t{result["id"]}");
}
// </output_vertices_edges>
- 将静态字符串
[CREATED PRODUCT]\t68719518403
写入控制台。 然后,使用foreach
循环循环访问每个匹配顶点,并将以[REPLACES PRODUCT]
开头的消息写入控制台,并将匹配的产品id
字段作为后缀。
// <imports>
using Gremlin.Net.Driver;
// </imports>
// <environment_variables>
string accountName = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_ENDPOINT")!;
string accountKey = Environment.GetEnvironmentVariable("COSMOS_GREMLIN_KEY")!;
// </environment_variables>
// <authenticate_client>
var server = new GremlinServer(
hostname: $"{accountName}.gremlin.cosmos.azure.cn",
port: 443,
username: "/dbs/cosmicworks/colls/products",
password: $"{accountKey}",
enableSsl: true
);
// </authenticate_client>
// <connect_client>
using var client = new GremlinClient(
gremlinServer: server,
messageSerializer: new Gremlin.Net.Structure.IO.GraphSON.GraphSON2MessageSerializer()
);
// </connect_client>
// <drop_graph>
await client.SubmitAsync(
requestScript: "g.V().drop()"
);
// </drop_graph>
// <create_vertices_1>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518371').property('name', 'Kiama classic surfboard').property('price', 285.55).property('category', 'surfboards')"
);
// </create_vertices_1>
// <create_vertices_2>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518403').property('name', 'Montau Turtle Surfboard').property('price', 600.00).property('category', 'surfboards')"
);
// </create_vertices_2>
// <create_vertices_3>
await client.SubmitAsync(
requestScript: "g.addV('product').property('id', '68719518409').property('name', 'Bondi Twin Surfboard').property('price', 585.50).property('category', 'surfboards')"
);
// </create_vertices_3>
// <create_edges_1>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518371']))"
);
// </create_edges_1>
// <create_edges_2>
await client.SubmitAsync(
requestScript: "g.V(['surfboards', '68719518403']).addE('replaces').to(g.V(['surfboards', '68719518409']))"
);
// </create_edges_2>
// <query_vertices_edges>
var results = await client.SubmitAsync<Dictionary<string, object>>(
requestScript: "g.V().hasLabel('product').has('category', 'surfboards').has('name', 'Montau Turtle Surfboard').outE('replaces').inV()"
);
// </query_vertices_edges>
// <output_vertices_edges>
Console.WriteLine($"[CREATED PRODUCT]\t68719518403");
foreach (var result in results ?? Enumerable.Empty<Dictionary<string, object>>())
{
Console.WriteLine($"[REPLACES PRODUCT]\t{result["id"]}");
}
// </output_vertices_edges>
运行代码
运行应用程序以验证应用程序是否按预期工作。 应用程序执行时应没有错误或警告。 应用程序的输出包括有关创建项和查询项的数据。
在 .NET 项目文件夹中打开终端。
使用
dotnet run
运行应用程序。dotnet run
观察应用程序的输出。
[CREATED PRODUCT] 68719518403 [REPLACES PRODUCT] 68719518371 [REPLACES PRODUCT] 68719518409
清理资源
当不再需要 API for Gremlin 帐户时,删除相应的资源组。
为 resourceGroupName 创建 shell 变量(如果尚不存在)。
# Variable for resource group name resourceGroupName="msdocs-cosmos-gremlin-quickstart"
使用
az group delete
删除资源组。az group delete \ --name $resourceGroupName