sqlserver_mcp_catalog/core/
mcp_server.rs

1// SQL Server 2025 - master/msdb/sandbox combined catalog MCP server — generated by mcpify. Do not hand-edit.
2
3use std::sync::Arc;
4
5use rmcp::handler::server::router::prompt::PromptRouter;
6use rmcp::handler::server::router::tool::ToolRouter;
7use rmcp::handler::server::wrapper::Parameters;
8use rmcp::model::{
9    CallToolResult, ContentBlock, Implementation, ProtocolVersion, ServerCapabilities, ServerInfo,
10};
11use rmcp::service::RequestContext;
12use rmcp::transport::stdio;
13use rmcp::{
14    ErrorData as McpError, RoleServer, ServerHandler, ServiceExt, prompt_handler, schemars, tool,
15    tool_handler, tool_router,
16};
17use serde::Deserialize;
18use tokio::sync::Mutex;
19
20use crate::auth::auth_manager::AuthManager;
21use crate::core::config_schema::Config;
22use crate::core::errors::McpifyError;
23use crate::data::store::{cached_store_connection, get_endpoint};
24use crate::tools::call_tool::call_operation;
25use crate::tools::get_tool::get_operation;
26use crate::tools::search_tool::search_operations;
27
28fn default_search_limit() -> usize {
29    5
30}
31
32#[derive(Debug, Deserialize, schemars::JsonSchema)]
33pub struct SearchArgs {
34    /// Natural-language description of the operation you need
35    pub query: String,
36    /// Maximum number of results
37    #[serde(default = "default_search_limit")]
38    pub limit: usize,
39}
40
41#[derive(Debug, Deserialize, schemars::JsonSchema)]
42pub struct GetArgs {
43    /// operationId returned by search
44    pub operation_id: String,
45}
46
47/// A missing `arguments` field defaults to `{}`, not `null` — every
48/// operation's generated input JSON Schema unconditionally declares
49/// `"type": "object"`, even for zero-param operations, so `null` always
50/// fails validation while `{}` always passes.
51fn default_call_arguments() -> serde_json::Value {
52    serde_json::json!({})
53}
54
55#[derive(Debug, Deserialize, schemars::JsonSchema)]
56pub struct CallArgs {
57    /// operationId returned by search
58    pub operation_id: String,
59    /// Operation parameters and/or request body. Defaults to `{}` when omitted.
60    #[serde(default = "default_call_arguments")]
61    pub arguments: serde_json::Value,
62}
63
64/// Shared state every `search`/`get`/`call` tool method needs. `Clone`
65/// because rmcp constructs one instance per session (see
66/// `http::server::start_http_server`'s service factory) — every field is
67/// either cheap to clone (`String`, `Config`) or already `Arc`-wrapped.
68#[derive(Clone)]
69pub struct McpifyServer {
70    api_version: String,
71    config: Config,
72    auth_manager: Arc<Mutex<AuthManager>>,
73    tool_router: ToolRouter<McpifyServer>,
74    prompt_router: PromptRouter<McpifyServer>,
75}
76
77#[tool_router]
78impl McpifyServer {
79    /// Takes an already-`Arc<Mutex<_>>`-wrapped `AuthManager` rather than
80    /// an owned one: `http::server::start_http_server`'s service factory
81    /// constructs a fresh `McpifyServer` per session, and `AuthManager`
82    /// itself isn't `Clone` (its `Box<dyn AuthStrategy>` field isn't
83    /// object-safe to clone) — every session shares the one configured
84    /// auth manager instead, which also matches this deployment's actual
85    /// semantics (a single configured auth method, not one per session).
86    pub fn new(api_version: String, config: Config, auth_manager: Arc<Mutex<AuthManager>>) -> Self {
87        Self {
88            api_version,
89            config,
90            auth_manager,
91            tool_router: Self::tool_router(),
92            prompt_router: Self::prompt_router(),
93        }
94    }
95
96    #[tool(
97        description = "Semantic search for SQL Server 2025 - master/msdb/sandbox combined catalog operations using a natural-language query."
98    )]
99    async fn search(
100        &self,
101        Parameters(args): Parameters<SearchArgs>,
102    ) -> Result<CallToolResult, McpError> {
103        let api_version = self.api_version.clone();
104        self.run_tool("search", async move {
105            let conn = cached_store_connection(&api_version)?.lock().unwrap();
106            search_operations(&conn, &args.query, args.limit)
107        })
108        .await
109    }
110
111    #[tool(
112        description = "Return the schema, path, method, and documentation for a specific SQL Server 2025 - master/msdb/sandbox combined catalog operationId."
113    )]
114    async fn get(&self, Parameters(args): Parameters<GetArgs>) -> Result<CallToolResult, McpError> {
115        let api_version = self.api_version.clone();
116        self.run_tool("get", async move {
117            let conn = cached_store_connection(&api_version)?.lock().unwrap();
118            get_operation(&conn, &args.operation_id)
119        })
120        .await
121    }
122
123    #[tool(
124        description = "Validate arguments, invoke a live SQL Server 2025 - master/msdb/sandbox combined catalog API operation, and validate the response."
125    )]
126    async fn call(
127        &self,
128        Parameters(args): Parameters<CallArgs>,
129        _context: RequestContext<RoleServer>,
130    ) -> Result<CallToolResult, McpError> {
131        let api_version = self.api_version.clone();
132        let config = self.config.clone();
133        let auth_manager = self.auth_manager.clone();
134
135        self.run_tool("call", async move {
136            // Looked up and the connection (guard) dropped *before* any
137            // `.await` below — `rusqlite::Connection` isn't `Sync`, so a
138            // `&Connection`/`MutexGuard<Connection>` held across an await
139            // point would make this future non-`Send`.
140            let endpoint = {
141                let conn = cached_store_connection(&api_version)?.lock().unwrap();
142                get_endpoint(&conn, &args.operation_id)?.ok_or_else(|| {
143                    McpifyError::NotFound(format!("unknown operationId '{}'", args.operation_id))
144                })?
145            };
146
147            let mut auth_manager = auth_manager.lock().await;
148            call_operation(
149                &endpoint,
150                &config,
151                &mut auth_manager,
152                &args.operation_id,
153                args.arguments,
154            )
155            .await
156        })
157        .await
158    }
159}
160
161impl McpifyServer {
162    /// Wraps a tool's core logic with consistent MCP response formatting
163    /// and error handling, so `search`/`get`/`call` each only implement
164    /// their own business logic, not the MCP content-envelope
165    /// boilerplate — mirrors `targets::typescript`'s `tool-executor.ts`.
166    async fn run_tool<F>(&self, tool_name: &str, fut: F) -> Result<CallToolResult, McpError>
167    where
168        F: std::future::Future<Output = anyhow::Result<serde_json::Value>>,
169    {
170        match fut.await {
171            Ok(value) => {
172                let text =
173                    serde_json::to_string_pretty(&value).unwrap_or_else(|_| value.to_string());
174                Ok(CallToolResult::success(vec![ContentBlock::text(text)]))
175            }
176            Err(err) => {
177                tracing::error!(tool = tool_name, error = %err, "tool execution failed");
178                Ok(CallToolResult::error(vec![ContentBlock::text(
179                    err.to_string(),
180                )]))
181            }
182        }
183    }
184}
185
186// `router = self.tool_router.clone()`: without it, `#[tool_handler]`
187// defaults to calling `Self::tool_router()` fresh on every `list_tools`/
188// `call_tool` request, rebuilding the router instead of reusing the one
189// `new()` already built into this instance's `tool_router` field.
190#[tool_handler(router = self.tool_router.clone())]
191#[prompt_handler(router = self.prompt_router.clone())]
192impl ServerHandler for McpifyServer {
193    fn get_info(&self) -> ServerInfo {
194        ServerInfo::new(
195            ServerCapabilities::builder()
196                .enable_tools()
197                .enable_prompts()
198                .build(),
199        )
200        .with_server_info(Implementation::from_build_env())
201        .with_protocol_version(ProtocolVersion::V_2024_11_05)
202        .with_instructions(
203            "Exposes exactly 3 tools -- search, get, call -- backed by an embedded \
204             semantic database, so you never need the full API surface in context. \
205             Also exposes MCP prompts -- start with the `sqlserver-workflow` prompt \
206             for guided, multi-step help with common SQL Server operational tasks."
207                .to_string(),
208        )
209    }
210}
211
212/// Runs `server` over the stdio transport until the client disconnects —
213/// the Terminal Client / Harness Server "stdio" mode's connection point
214/// (Story R5 wires this into `main.rs`'s subcommand dispatch).
215pub async fn connect_stdio<S>(server: S) -> anyhow::Result<()>
216where
217    S: rmcp::ServerHandler,
218{
219    let running = server.serve(stdio()).await?;
220    tracing::info!("MCP server connected over stdio");
221    running.waiting().await?;
222    Ok(())
223}
224
225#[cfg(test)]
226mod tests {
227    use super::*;
228    use crate::core::config_schema::AuthMethod;
229
230    fn server() -> McpifyServer {
231        let config: Config = serde_json::from_value(serde_json::json!({
232            "url": "localhost",
233            "auth_method": "sql_server"
234        }))
235        .unwrap();
236        McpifyServer::new(
237            "2025".to_string(),
238            config,
239            Arc::new(Mutex::new(AuthManager::new(AuthMethod::SqlServer))),
240        )
241    }
242
243    #[tokio::test]
244    async fn successful_tool_execution_returns_pretty_json_text() {
245        let result = server()
246            .run_tool("test", async { Ok(serde_json::json!({ "answer": 42 })) })
247            .await
248            .unwrap();
249
250        assert_eq!(result.is_error, Some(false));
251        assert_eq!(result.content.len(), 1);
252        assert_eq!(
253            result.content[0].as_text().unwrap().text,
254            "{\n  \"answer\": 42\n}"
255        );
256    }
257
258    #[tokio::test]
259    async fn failed_tool_execution_returns_a_caller_visible_error() {
260        let result = server()
261            .run_tool("test", async {
262                Err::<serde_json::Value, _>(anyhow::anyhow!("operation failed"))
263            })
264            .await
265            .unwrap();
266
267        assert_eq!(result.is_error, Some(true));
268        assert_eq!(
269            result.content[0].as_text().unwrap().text,
270            "operation failed"
271        );
272    }
273
274    #[test]
275    fn server_info_advertises_only_the_curated_tool_surface() {
276        let info = server().get_info();
277        assert!(info.capabilities.tools.is_some());
278        assert!(info.capabilities.prompts.is_some());
279        assert!(info.instructions.unwrap().contains("exactly 3 tools"));
280    }
281}
sqlserver_mcp_catalog/core/mcp_server.rs

sqlserver_mcp_catalog/core/
mcp_server.rs
