使用 Amazon SDK 运行 OpenCypher 查询

按照安装说明安装 Boto3。

创建名为的文件openCypherExample.py并粘贴以下代码：

import boto3
import json
from botocore.config import Config

# Disable the client-side read timeout and retries so that
# Neptune's server-side neptune_query_timeout controls query duration.
client = boto3.client(
    'neptunedata',
    endpoint_url=f'https://YOUR_NEPTUNE_HOST:YOUR_NEPTUNE_PORT',
    config=Config(read_timeout=None, retries={'total_max_attempts': 1})
)

response = client.execute_open_cypher_query(
    openCypherQuery='MATCH (n) RETURN n LIMIT 1'
)

print(json.dumps(response['results'], indent=2))

运行示例：python openCypherExample.py

按照安装说明设置适用于 Java 的 Amazon SDK。

使用以下代码设置NeptunedataClient、运行 OpenCypher 查询并打印结果：

import java.net.URI;
import java.time.Duration;
import software.amazon.awssdk.core.client.config.ClientOverrideConfiguration;
import software.amazon.awssdk.core.retry.RetryPolicy;
import software.amazon.awssdk.services.neptunedata.NeptunedataClient;
import software.amazon.awssdk.services.neptunedata.model.ExecuteOpenCypherQueryRequest;
import software.amazon.awssdk.services.neptunedata.model.ExecuteOpenCypherQueryResponse;

// Disable the client-side timeout and retries so that
// Neptune's server-side neptune_query_timeout controls query duration.
NeptunedataClient client = NeptunedataClient.builder()
    .endpointOverride(URI.create("https://YOUR_NEPTUNE_HOST:YOUR_NEPTUNE_PORT"))
    .overrideConfiguration(ClientOverrideConfiguration.builder()
        .apiCallTimeout(Duration.ZERO)
        .retryPolicy(RetryPolicy.none())
        .build())
    .build();

ExecuteOpenCypherQueryRequest request = ExecuteOpenCypherQueryRequest.builder()
    .openCypherQuery("MATCH (n) RETURN n LIMIT 1")
    .build();

ExecuteOpenCypherQueryResponse response = client.executeOpenCypherQuery(request);

System.out.println(response.results().toString());

按照安装说明为设置 S Amazon DK JavaScript。安装 neptunedata 客户端软件包:. npm install @aws-sdk/client-neptunedata

创建名为的文件openCypherExample.js并粘贴以下代码：

import { NeptunedataClient, ExecuteOpenCypherQueryCommand } from "@aws-sdk/client-neptunedata";
import { NodeHttpHandler } from "@smithy/node-http-handler";

const config = {
    endpoint: "https://YOUR_NEPTUNE_HOST:YOUR_NEPTUNE_PORT",
    // Disable the client-side request timeout so that
    // Neptune's server-side neptune_query_timeout controls query duration.
    requestHandler: new NodeHttpHandler({
        requestTimeout: 0
    }),
    maxAttempts: 1
};

const client = new NeptunedataClient(config);

const input = {
    openCypherQuery: "MATCH (n) RETURN n LIMIT 1"
};

const command = new ExecuteOpenCypherQueryCommand(input);
const response = await client.send(command);

console.log(JSON.stringify(response, null, 2));

运行示例：node openCypherExample.js