WasmCloud 图数据库 Actor 接口

此 crate 在 wasmcloud:graphdb 合同之上提供抽象。这使得 Actor 可以与图数据库交互，例如 RedisGraph 或 Neo4j。

示例

use serde_json::json;
extern crate wapc_guest as guest;
use wasmcloud_actor_graphdb as graph;
use graph::*;
use wasmcloud_actor_http_server as http;
use wasmcloud_actor_core as actor;

use guest::prelude::*;

#[actor::init]
pub fn init() {
    http::Handlers::register_handle_request(handle_http_request);
}

fn handle_http_request(_: http::Request) -> HandlerResult<http::Response> {
    // Replace `query_db` with `graph::default().query_graph()`
    let (name, birth_year): (String, u32) = query_db(
        "MotoGP".to_string(),
        "MATCH (r:Rider)-[:rides]->(t:Team) WHERE t.name = 'Yamaha' RETURN r.name, r.birth_year"
            .to_string(),
    )?;

    assert_eq!(name, "Alice Rider".to_string());
    assert_eq!(birth_year, 1985);

    let result = json!({
        "name": name,
        "birth_year": birth_year
    });

    Ok(http::Response::json(result, 200, "OK"))
}