17759877157

Committed 16 Sep 2025 08:35AM UTC coverage: 82.063% (+0.5%) from 81.531%

Build # 17759877157

Build Type

push

github

Committed by

web-flow

Commit Message

fix: incorrect number of clusters found (#561)

Run Details

1018 of 1352 branches covered (75.3%)

Branch coverage included in aggregate %.

7 of 7 new or added lines in 1 file covered. (100.0%)

70 existing lines in 5 files now uncovered.

5021 of 6007 relevant lines covered (83.59%)

54.28 hits per line

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80.97

/src/server.ts

import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import type { Session } from "./common/session.js";
import type { Transport } from "@modelcontextprotocol/sdk/shared/transport.js";
import { AtlasTools } from "./tools/atlas/tools.js";
import { MongoDbTools } from "./tools/mongodb/tools.js";
import { Resources } from "./resources/resources.js";
import type { LogLevel } from "./common/logger.js";
import { LogId, McpLogger } from "./common/logger.js";
import type { Telemetry } from "./telemetry/telemetry.js";
import type { UserConfig } from "./common/config.js";
import { type ServerEvent } from "./telemetry/types.js";
import { type ServerCommand } from "./telemetry/types.js";
import type { CallToolResult } from "@modelcontextprotocol/sdk/types.js";
import {
    CallToolRequestSchema,
    SetLevelRequestSchema,
    SubscribeRequestSchema,
    UnsubscribeRequestSchema,
} from "@modelcontextprotocol/sdk/types.js";
import assert from "assert";
import type { ToolBase } from "./tools/tool.js";
import { validateConnectionString } from "./helpers/connectionOptions.js";
import { packageInfo } from "./common/packageInfo.js";
import { type ConnectionErrorHandler } from "./common/connectionErrorHandler.js";
import type { Elicitation } from "./elicitation.js";

export interface ServerOptions {
    session: Session;
    userConfig: UserConfig;
    mcpServer: McpServer;
    telemetry: Telemetry;
    elicitation: Elicitation;
    connectionErrorHandler: ConnectionErrorHandler;
}

export class Server {
    public readonly session: Session;
    public readonly mcpServer: McpServer;
    private readonly telemetry: Telemetry;
    public readonly userConfig: UserConfig;
    public readonly elicitation: Elicitation;
    public readonly tools: ToolBase[] = [];
    public readonly connectionErrorHandler: ConnectionErrorHandler;

    private _mcpLogLevel: LogLevel = "debug";

    public get mcpLogLevel(): LogLevel {
        return this._mcpLogLevel;
    }

    private readonly startTime: number;
    private readonly subscriptions = new Set<string>();

    constructor({ session, mcpServer, userConfig, telemetry, connectionErrorHandler, elicitation }: ServerOptions) {
        this.startTime = Date.now();
        this.session = session;
        this.telemetry = telemetry;
        this.mcpServer = mcpServer;
        this.userConfig = userConfig;
        this.elicitation = elicitation;
        this.connectionErrorHandler = connectionErrorHandler;
    }

    async connect(transport: Transport): Promise<void> {
        // Resources are now reactive, so we register them ASAP so they can listen to events like
        // connection events.
        this.registerResources();
        await this.validateConfig();

        this.mcpServer.server.registerCapabilities({ logging: {}, resources: { listChanged: true, subscribe: true } });

        // TODO: Eventually we might want to make tools reactive too instead of relying on custom logic.
        this.registerTools();

        // This is a workaround for an issue we've seen with some models, where they'll see that everything in the `arguments`
        // object is optional, and then not pass it at all. However, the MCP server expects the `arguments` object to be if
        // the tool accepts any arguments, even if they're all optional.
        //
        // see: https://github.com/modelcontextprotocol/typescript-sdk/blob/131776764536b5fdca642df51230a3746fb4ade0/src/server/mcp.ts#L705
        // Since paramsSchema here is not undefined, the server will create a non-optional z.object from it.
        const existingHandler = (
            this.mcpServer.server["_requestHandlers"] as Map<
                string,
                (request: unknown, extra: unknown) => Promise<CallToolResult>
            >
        ).get(CallToolRequestSchema.shape.method.value);

        assert(existingHandler, "No existing handler found for CallToolRequestSchema");

        this.mcpServer.server.setRequestHandler(CallToolRequestSchema, (request, extra): Promise<CallToolResult> => {
            if (!request.params.arguments) {
                request.params.arguments = {};
            }

            return existingHandler(request, extra);
        });

        this.mcpServer.server.setRequestHandler(SubscribeRequestSchema, ({ params }) => {
            this.subscriptions.add(params.uri);
            this.session.logger.debug({
                id: LogId.serverInitialized,
                context: "resources",
                message: `Client subscribed to resource: ${params.uri}`,
            });
            return {};
        });

        this.mcpServer.server.setRequestHandler(UnsubscribeRequestSchema, ({ params }) => {
            this.subscriptions.delete(params.uri);
            this.session.logger.debug({
                id: LogId.serverInitialized,
                context: "resources",
                message: `Client unsubscribed from resource: ${params.uri}`,
            });
            return {};
        });

        this.mcpServer.server.setRequestHandler(SetLevelRequestSchema, ({ params }) => {
            if (!McpLogger.LOG_LEVELS.includes(params.level)) {
                throw new Error(`Invalid log level: ${params.level}`);
            }

            this._mcpLogLevel = params.level;
            return {};
        });

        this.mcpServer.server.oninitialized = (): void => {
            this.session.setMcpClient(this.mcpServer.server.getClientVersion());
            // Placed here to start the connection to the config connection string as soon as the server is initialized.
            void this.connectToConfigConnectionString();
            this.session.logger.info({
                id: LogId.serverInitialized,
                context: "server",
                message: `Server with version ${packageInfo.version} started with transport ${transport.constructor.name} and agent runner ${JSON.stringify(this.session.mcpClient)}`,
            });

            this.emitServerEvent("start", Date.now() - this.startTime);
        };

        this.mcpServer.server.onclose = (): void => {
            const closeTime = Date.now();
            this.emitServerEvent("stop", Date.now() - closeTime);
        };

        this.mcpServer.server.onerror = (error: Error): void => {
            const closeTime = Date.now();
            this.emitServerEvent("stop", Date.now() - closeTime, error);
        };

        await this.mcpServer.connect(transport);
    }

    async close(): Promise<void> {
        await this.telemetry.close();
        await this.session.close();
        await this.mcpServer.close();
    }

    public sendResourceListChanged(): void {
        this.mcpServer.sendResourceListChanged();
    }

    public sendResourceUpdated(uri: string): void {
        if (this.subscriptions.has(uri)) {
            void this.mcpServer.server.sendResourceUpdated({ uri });
        }
    }

    /**
     * Emits a server event
     * @param command - The server command (e.g., "start", "stop", "register", "deregister")
     * @param additionalProperties - Additional properties specific to the event
     */
    private emitServerEvent(command: ServerCommand, commandDuration: number, error?: Error): void {
        const event: ServerEvent = {
            timestamp: new Date().toISOString(),
            source: "mdbmcp",
            properties: {
                result: "success",
                duration_ms: commandDuration,
                component: "server",
                category: "other",
                command: command,
            },
        };

        if (command === "start") {
            event.properties.startup_time_ms = commandDuration;
            event.properties.read_only_mode = this.userConfig.readOnly || false;
            event.properties.disabled_tools = this.userConfig.disabledTools || [];
            event.properties.confirmation_required_tools = this.userConfig.confirmationRequiredTools || [];
        }
        if (command === "stop") {
            event.properties.runtime_duration_ms = Date.now() - this.startTime;
            if (error) {
                event.properties.result = "failure";
                event.properties.reason = error.message;
            }
        }

        this.telemetry.emitEvents([event]);
    }

    private registerTools(): void {
        for (const toolConstructor of [...AtlasTools, ...MongoDbTools]) {
            const tool = new toolConstructor({
                session: this.session,
                config: this.userConfig,
                telemetry: this.telemetry,
                elicitation: this.elicitation,
            });
            if (tool.register(this)) {
                this.tools.push(tool);
            }
        }
    }

    private registerResources(): void {
        for (const resourceConstructor of Resources) {
            const resource = new resourceConstructor(this.session, this.userConfig, this.telemetry);
            resource.register(this);
        }
    }

    private async validateConfig(): Promise<void> {
        // Validate connection string
        if (this.userConfig.connectionString) {
            try {
                validateConnectionString(this.userConfig.connectionString, false);
            } catch (error) {
                console.error("Connection string validation failed with error: ", error);
                throw new Error(
                    "Connection string validation failed with error: " +
                        (error instanceof Error ? error.message : String(error))
                );
            }
        }

        // Validate API client credentials
        if (this.userConfig.apiClientId && this.userConfig.apiClientSecret) {
            try {
                await this.session.apiClient.validateAccessToken();
            } catch (error) {
                if (this.userConfig.connectionString === undefined) {
                    console.error("Failed to validate MongoDB Atlas the credentials from the config: ", error);

                    throw new Error(
                        "Failed to connect to MongoDB Atlas instance using the credentials from the config"
                    );
                }
                console.error(
                    "Failed to validate MongoDB Atlas the credentials from the config, but validated the connection string."
                );
            }
        }
    }

    private async connectToConfigConnectionString(): Promise<void> {
        if (this.userConfig.connectionString) {
            try {
                this.session.logger.info({
                    id: LogId.mongodbConnectTry,
                    context: "server",
                    message: `Detected a MongoDB connection string in the configuration, trying to connect...`,
                });
                await this.session.connectToMongoDB({
                    connectionString: this.userConfig.connectionString,
                });
            } catch (error) {
                // We don't throw an error here because we want to allow the server to start even if the connection string is invalid.
                this.session.logger.error({
                    id: LogId.mongodbConnectFailure,
                    context: "server",
                    message: `Failed to connect to MongoDB instance using the connection string from the config: ${error instanceof Error ? error.message : String(error)}`,
                });
            }
        }
    }
}

1	import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
2	import type { Session } from "./common/session.js";
3	import type { Transport } from "@modelcontextprotocol/sdk/shared/transport.js";
4	import { AtlasTools } from "./tools/atlas/tools.js";	2✔
5	import { MongoDbTools } from "./tools/mongodb/tools.js";	2✔
6	import { Resources } from "./resources/resources.js";	2✔
7	import type { LogLevel } from "./common/logger.js";
8	import { LogId, McpLogger } from "./common/logger.js";	2✔
9	import type { Telemetry } from "./telemetry/telemetry.js";
10	import type { UserConfig } from "./common/config.js";
11	import { type ServerEvent } from "./telemetry/types.js";
12	import { type ServerCommand } from "./telemetry/types.js";
13	import type { CallToolResult } from "@modelcontextprotocol/sdk/types.js";
14	import {	2✔
15	CallToolRequestSchema,
16	SetLevelRequestSchema,
17	SubscribeRequestSchema,
18	UnsubscribeRequestSchema,
19	} from "@modelcontextprotocol/sdk/types.js";
20	import assert from "assert";	2✔
21	import type { ToolBase } from "./tools/tool.js";
22	import { validateConnectionString } from "./helpers/connectionOptions.js";	2✔
23	import { packageInfo } from "./common/packageInfo.js";	2✔
24	import { type ConnectionErrorHandler } from "./common/connectionErrorHandler.js";
25	import type { Elicitation } from "./elicitation.js";
26
27	export interface ServerOptions {
28	session: Session;
29	userConfig: UserConfig;
30	mcpServer: McpServer;
31	telemetry: Telemetry;
32	elicitation: Elicitation;
33	connectionErrorHandler: ConnectionErrorHandler;
34	}
35
36	export class Server {	2✔
37	public readonly session: Session;
38	public readonly mcpServer: McpServer;
39	private readonly telemetry: Telemetry;
40	public readonly userConfig: UserConfig;
41	public readonly elicitation: Elicitation;
42	public readonly tools: ToolBase[] = [];	2✔
43	public readonly connectionErrorHandler: ConnectionErrorHandler;
44
45	private _mcpLogLevel: LogLevel = "debug";	2✔
46
47	public get mcpLogLevel(): LogLevel {	2✔
48	return this._mcpLogLevel;	2✔
49	}	2✔
50
51	private readonly startTime: number;
52	private readonly subscriptions = new Set<string>();	2✔
53
54	constructor({ session, mcpServer, userConfig, telemetry, connectionErrorHandler, elicitation }: ServerOptions) {	2✔
55	this.startTime = Date.now();	67✔
56	this.session = session;	67✔
57	this.telemetry = telemetry;	67✔
58	this.mcpServer = mcpServer;	67✔
59	this.userConfig = userConfig;	67✔
60	this.elicitation = elicitation;	67✔
61	this.connectionErrorHandler = connectionErrorHandler;	67✔
62	}	67✔
63
64	async connect(transport: Transport): Promise<void> {	2✔
65	// Resources are now reactive, so we register them ASAP so they can listen to events like
66	// connection events.
67	this.registerResources();	66✔
68	await this.validateConfig();	66✔
69
70	this.mcpServer.server.registerCapabilities({ logging: {}, resources: { listChanged: true, subscribe: true } });	66✔
71
72	// TODO: Eventually we might want to make tools reactive too instead of relying on custom logic.
73	this.registerTools();	66✔
74
75	// This is a workaround for an issue we've seen with some models, where they'll see that everything in the `arguments`
76	// object is optional, and then not pass it at all. However, the MCP server expects the `arguments` object to be if
77	// the tool accepts any arguments, even if they're all optional.
78	//
79	// see: https://github.com/modelcontextprotocol/typescript-sdk/blob/131776764536b5fdca642df51230a3746fb4ade0/src/server/mcp.ts#L705
80	// Since paramsSchema here is not undefined, the server will create a non-optional z.object from it.
81	const existingHandler = (	66✔
82	this.mcpServer.server["_requestHandlers"] as Map<	66✔
83	string,
84	(request: unknown, extra: unknown) => Promise<CallToolResult>
85	>
86	).get(CallToolRequestSchema.shape.method.value);	66✔
87
88	assert(existingHandler, "No existing handler found for CallToolRequestSchema");	66✔
89
90	this.mcpServer.server.setRequestHandler(CallToolRequestSchema, (request, extra): Promise<CallToolResult> => {	66✔
91	if (!request.params.arguments) {	492✔
92	request.params.arguments = {};	1✔
93	}	1✔
94
95	return existingHandler(request, extra);	492✔
96	});	66✔
97
98	this.mcpServer.server.setRequestHandler(SubscribeRequestSchema, ({ params }) => {	66✔
99	this.subscriptions.add(params.uri);	20✔
100	this.session.logger.debug({	20✔
101	id: LogId.serverInitialized,	20✔
102	context: "resources",	20✔
103	message: `Client subscribed to resource: ${params.uri}`,	20✔
104	});	20✔
105	return {};	20✔
106	});	66✔
107
108	this.mcpServer.server.setRequestHandler(UnsubscribeRequestSchema, ({ params }) => {	66✔
109	this.subscriptions.delete(params.uri);	×
110	this.session.logger.debug({	×
111	id: LogId.serverInitialized,	×
UNCOV 112	context: "resources",	×
UNCOV 113	message: `Client unsubscribed from resource: ${params.uri}`,	×
UNCOV 114	});	×
115	return {};	×
116	});	66✔
117
118	this.mcpServer.server.setRequestHandler(SetLevelRequestSchema, ({ params }) => {	66✔
119	if (!McpLogger.LOG_LEVELS.includes(params.level)) {	×
120	throw new Error(`Invalid log level: ${params.level}`);	×
UNCOV 121	}	×
122
UNCOV 123	this._mcpLogLevel = params.level;	×
UNCOV 124	return {};	×
125	});	66✔
126
127	this.mcpServer.server.oninitialized = (): void => {	66✔
128	this.session.setMcpClient(this.mcpServer.server.getClientVersion());	66✔
129	// Placed here to start the connection to the config connection string as soon as the server is initialized.
130	void this.connectToConfigConnectionString();	66✔
131	this.session.logger.info({	66✔
132	id: LogId.serverInitialized,	66✔
133	context: "server",	66✔
134	message: `Server with version ${packageInfo.version} started with transport ${transport.constructor.name} and agent runner ${JSON.stringify(this.session.mcpClient)}`,	66✔
135	});	66✔
136
137	this.emitServerEvent("start", Date.now() - this.startTime);	66✔
138	};	66✔
139
140	this.mcpServer.server.onclose = (): void => {	66✔
141	const closeTime = Date.now();	66✔
142	this.emitServerEvent("stop", Date.now() - closeTime);	66✔
143	};	66✔
144
145	this.mcpServer.server.onerror = (error: Error): void => {	66✔
UNCOV 146	const closeTime = Date.now();	×
UNCOV 147	this.emitServerEvent("stop", Date.now() - closeTime, error);	×
UNCOV 148	};	×
149
150	await this.mcpServer.connect(transport);	66✔
151	}	66✔
152
153	async close(): Promise<void> {	2✔
154	await this.telemetry.close();	66✔
155	await this.session.close();	66✔
156	await this.mcpServer.close();	66✔
157	}	66✔
158
159	public sendResourceListChanged(): void {	2✔
160	this.mcpServer.sendResourceListChanged();	546✔
161	}	546✔
162
163	public sendResourceUpdated(uri: string): void {	2✔
164	if (this.subscriptions.has(uri)) {	546!
165	void this.mcpServer.server.sendResourceUpdated({ uri });	20✔
166	}	20✔
167	}	546✔
168
169	/**
170	* Emits a server event
171	* @param command - The server command (e.g., "start", "stop", "register", "deregister")
172	* @param additionalProperties - Additional properties specific to the event
173	*/
174	private emitServerEvent(command: ServerCommand, commandDuration: number, error?: Error): void {	2✔
175	const event: ServerEvent = {	132✔
176	timestamp: new Date().toISOString(),	132✔
177	source: "mdbmcp",	132✔
178	properties: {	132✔
179	result: "success",	132✔
180	duration_ms: commandDuration,	132✔
181	component: "server",	132✔
182	category: "other",	132✔
183	command: command,	132✔
184	},	132✔
185	};	132✔
186
187	if (command === "start") {	132✔
188	event.properties.startup_time_ms = commandDuration;	66✔
189	event.properties.read_only_mode = this.userConfig.readOnly \|\| false;	66✔
190	event.properties.disabled_tools = this.userConfig.disabledTools \|\| [];	66!
191	event.properties.confirmation_required_tools = this.userConfig.confirmationRequiredTools \|\| [];	66!
192	}	66✔
193	if (command === "stop") {	132✔
194	event.properties.runtime_duration_ms = Date.now() - this.startTime;	66✔
195	if (error) {	66!
UNCOV 196	event.properties.result = "failure";	×
UNCOV 197	event.properties.reason = error.message;	×
UNCOV 198	}	×
199	}	66✔
200
201	this.telemetry.emitEvents([event]);	132✔
202	}	132✔
203
204	private registerTools(): void {	2✔
205	for (const toolConstructor of [...AtlasTools, ...MongoDbTools]) {	66✔
206	const tool = new toolConstructor({	2,178✔
207	session: this.session,	2,178✔
208	config: this.userConfig,	2,178✔
209	telemetry: this.telemetry,	2,178✔
210	elicitation: this.elicitation,	2,178✔
211	});	2,178✔
212	if (tool.register(this)) {	2,178✔
213	this.tools.push(tool);	1,529✔
214	}	1,529✔
215	}	2,178✔
216	}	66✔
217
218	private registerResources(): void {	2✔
219	for (const resourceConstructor of Resources) {	66✔
220	const resource = new resourceConstructor(this.session, this.userConfig, this.telemetry);	198✔
221	resource.register(this);	198✔
222	}	198✔
223	}	66✔
224
225	private async validateConfig(): Promise<void> {	2✔
226	// Validate connection string
227	if (this.userConfig.connectionString) {	66!
228	try {	5✔
229	validateConnectionString(this.userConfig.connectionString, false);	5✔
230	} catch (error) {	5!
UNCOV 231	console.error("Connection string validation failed with error: ", error);	×
UNCOV 232	throw new Error(	×
UNCOV 233	"Connection string validation failed with error: " +	×
234	(error instanceof Error ? error.message : String(error))	×
235	);	×
UNCOV 236	}	×
237	}	5✔
238
239	// Validate API client credentials
240	if (this.userConfig.apiClientId && this.userConfig.apiClientSecret) {	66✔
241	try {	13✔
242	await this.session.apiClient.validateAccessToken();	13✔
243	} catch (error) {	13!
244	if (this.userConfig.connectionString === undefined) {	×
UNCOV 245	console.error("Failed to validate MongoDB Atlas the credentials from the config: ", error);	×
246
UNCOV 247	throw new Error(	×
UNCOV 248	"Failed to connect to MongoDB Atlas instance using the credentials from the config"	×
UNCOV 249	);	×
UNCOV 250	}	×
UNCOV 251	console.error(	×
UNCOV 252	"Failed to validate MongoDB Atlas the credentials from the config, but validated the connection string."	×
UNCOV 253	);	×
UNCOV 254	}	×
255	}	13✔
256	}	66✔
257
258	private async connectToConfigConnectionString(): Promise<void> {	2✔
259	if (this.userConfig.connectionString) {	66!
260	try {	5✔
261	this.session.logger.info({	5✔
262	id: LogId.mongodbConnectTry,	5✔
263	context: "server",	5✔
264	message: `Detected a MongoDB connection string in the configuration, trying to connect...`,	5✔
265	});	5✔
266	await this.session.connectToMongoDB({	5✔
267	connectionString: this.userConfig.connectionString,	5✔
268	});	5✔
269	} catch (error) {	3✔
270	// We don't throw an error here because we want to allow the server to start even if the connection string is invalid.
271	this.session.logger.error({	2✔
272	id: LogId.mongodbConnectFailure,	2✔
273	context: "server",	2✔
274	message: `Failed to connect to MongoDB instance using the connection string from the config: ${error instanceof Error ? error.message : String(error)}`,	2!
275	});	2✔
276	}	2✔
277	}	5✔
278	}	66✔
279	}	2✔

mongodb-js / mongodb-mcp-server / 17759877157

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