fix: abort startup if not connected to MongoDB server #665

Sainan · 2024-12-29T19:11:47-08:00

Sainan commented

2024-12-29 19:11:47 -08:00

No description provided.

coderabbitai[bot] commented

2024-12-29 19:11:53 -08:00

(Migrated from github.com)

Walkthrough

The pull request modifies the database connection logic in the application by replacing the connectDatabase function previously found in src/services/mongoService.ts with a direct connection implementation in src/index.ts using the Mongoose library. The connection is established through mongoose.connect(config.mongodbUrl), and upon successful connection, a log message is generated. Enhanced error handling is implemented with a .catch block that checks for Error instances and logs the respective error message, exiting the process if a connection error occurs. The server initialization logic is now nested within the promise resolution of the Mongoose connection, ensuring that the HTTP and HTTPS servers are only started after confirming a successful database connection. The mongoService.ts file has been removed as part of these changes.

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## Walkthrough The pull request modifies the database connection logic in the application by replacing the `connectDatabase` function previously found in `src/services/mongoService.ts` with a direct connection implementation in `src/index.ts` using the Mongoose library. The connection is established through `mongoose.connect(config.mongodbUrl)`, and upon successful connection, a log message is generated. Enhanced error handling is implemented with a `.catch` block that checks for `Error` instances and logs the respective error message, exiting the process if a connection error occurs. The server initialization logic is now nested within the promise resolution of the Mongoose connection, ensuring that the HTTP and HTTPS servers are only started after confirming a successful database connection. The `mongoService.ts` file has been removed as part of these changes.      --- Thank you for using CodeRabbit. We offer it for free to the OSS community and would appreciate your support in helping us grow. 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coderabbitai[bot] (Migrated from github.com) reviewed 2024-12-29 19:14:56 -08:00

coderabbitai[bot] (Migrated from github.com) left a comment

Caution

Inline review comments failed to post. This is likely due to GitHub's limits when posting large numbers of comments.

Actionable comments posted: 1

🧹 Nitpick comments (2)

src/index.ts (2)
16-19: Consider specifying additional Mongoose connection options
The default .connect(config.mongodbUrl) is fine for most scenarios, but adding options such as { useNewUrlParser: true, useUnifiedTopology: true } can improve compatibility and reduce deprecation warnings in older Node.js/Mongoose versions.
 mongoose
-    .connect(config.mongodbUrl)
+    .connect(config.mongodbUrl, {
+        useNewUrlParser: true,
+        useUnifiedTopology: true
+    })
21-36: Handle missing or invalid certificate file paths
In the event that the certificate files static/certs/key.pem or static/certs/cert.pem are missing or invalid, the server setup will throw an error without a clear log. Consider adding a try/catch or verifying file accessibility before attempting to start the servers.

🛑 Comments failed to post (1)

src/index.ts (1)
38-43: 🛠️ Refactor suggestion

Non-zero exit code for connection failure
Currently, process.exit(0) indicates a successful exit even though the server is failing to start. A non-zero exit code (e.g., 1) is a better indicator of a failed startup in most environments and CI/CD pipelines.
 .catch(error => {
     if (error instanceof Error) {
         logger.error(`Error connecting to MongoDB server: ${error.message}`);
     }
-    process.exit(0);
+    process.exit(1);
 });
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
    })
    .catch(error => {
        if (error instanceof Error) {
            logger.error(`Error connecting to MongoDB server: ${error.message}`);
        }
        process.exit(1);

> [!CAUTION] > Inline review comments failed to post. This is likely due to GitHub's limits when posting large numbers of comments. **Actionable comments posted: 1** <details> <summary>🧹 Nitpick comments (2)</summary><blockquote> <details> <summary>src/index.ts (2)</summary><blockquote> `16-19`: **Consider specifying additional Mongoose connection options** The default `.connect(config.mongodbUrl)` is fine for most scenarios, but adding options such as `{ useNewUrlParser: true, useUnifiedTopology: true }` can improve compatibility and reduce deprecation warnings in older Node.js/Mongoose versions. ```diff mongoose - .connect(config.mongodbUrl) + .connect(config.mongodbUrl, { + useNewUrlParser: true, + useUnifiedTopology: true + }) ``` --- `21-36`: **Handle missing or invalid certificate file paths** In the event that the certificate files `static/certs/key.pem` or `static/certs/cert.pem` are missing or invalid, the server setup will throw an error without a clear log. Consider adding a try/catch or verifying file accessibility before attempting to start the servers. </blockquote></details> </blockquote></details> <details> <summary>🛑 Comments failed to post (1)</summary><blockquote> <details> <summary>src/index.ts (1)</summary><blockquote> 38-43: _:hammer_and_wrench: Refactor suggestion_ **Non-zero exit code for connection failure** Currently, `process.exit(0)` indicates a successful exit even though the server is failing to start. A non-zero exit code (e.g., `1`) is a better indicator of a failed startup in most environments and CI/CD pipelines. ```diff .catch(error => { if (error instanceof Error) { logger.error(`Error connecting to MongoDB server: ${error.message}`); } - process.exit(0); + process.exit(1); }); ```  <details> <summary>📝 Committable suggestion</summary> > ‼️ **IMPORTANT** > Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements. `````suggestion }) .catch(error => { if (error instanceof Error) { logger.error(`Error connecting to MongoDB server: ${error.message}`); } process.exit(1); ````` </details>  </blockquote></details> </blockquote></details>

coderabbitai[bot] (Migrated from github.com) reviewed 2024-12-29 19:16:16 -08:00

coderabbitai[bot] (Migrated from github.com) left a comment

Actionable comments posted: 3

🧹 Nitpick comments (1)

src/index.ts (1)

39-43: Improve MongoDB error handling specificity.

The current error handling could be more specific to help diagnose MongoDB connection issues better.

Apply this diff:

     .catch(error => {
-        if (error instanceof Error) {
+        if (error instanceof mongoose.Error.MongooseServerSelectionError) {
+            logger.error("MongoDB server not reachable. Please check if the server is running.");
+        } else if (error instanceof mongoose.Error.MongooseError) {
+            logger.error(`MongoDB connection error: ${error.message}`);
+        } else if (error instanceof Error) {
             logger.error(`Error connecting to MongoDB server: ${error.message}`);
         }
         process.exit(1);
     });

📜 Review details

Configuration used: .coderabbit.yaml
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 4221826ec4d1b38dd9b7fdbde59d3eaa692536dc and d897f40c92.

📒 Files selected for processing (2)

src/index.ts (1 hunks)
src/services/mongoService.ts (0 hunks)

💤 Files with no reviewable changes (1)

src/services/mongoService.ts

🔇 Additional comments (2)

src/index.ts (2)

11-11: LGTM!

The mongoose import is correctly added.

16-43: Implementation successfully meets PR objectives!

The changes effectively ensure that:

MongoDB connection is attempted before starting the servers
Application aborts on connection failure
Appropriate error messages are logged

This aligns perfectly with the PR objective to "abort startup if not connected to MongoDB server".

**Actionable comments posted: 3** <details> <summary>🧹 Nitpick comments (1)</summary><blockquote> <details> <summary>src/index.ts (1)</summary><blockquote> `39-43`: **Improve MongoDB error handling specificity.** The current error handling could be more specific to help diagnose MongoDB connection issues better. Apply this diff: ```diff .catch(error => { - if (error instanceof Error) { + if (error instanceof mongoose.Error.MongooseServerSelectionError) { + logger.error("MongoDB server not reachable. Please check if the server is running."); + } else if (error instanceof mongoose.Error.MongooseError) { + logger.error(`MongoDB connection error: ${error.message}`); + } else if (error instanceof Error) { logger.error(`Error connecting to MongoDB server: ${error.message}`); } process.exit(1); }); ``` </blockquote></details> </blockquote></details> <details> <summary>📜 Review details</summary> **Configuration used: .coderabbit.yaml** **Review profile: CHILL** **Plan: Pro** <details> <summary>📥 Commits</summary> Reviewing files that changed from the base of the PR and between 4221826ec4d1b38dd9b7fdbde59d3eaa692536dc and d897f40c9211b9d6ae1324123ea8b2feab2300f9. </details> <details> <summary>📒 Files selected for processing (2)</summary> * `src/index.ts` (1 hunks) * `src/services/mongoService.ts` (0 hunks) </details> <details> <summary>💤 Files with no reviewable changes (1)</summary> * src/services/mongoService.ts </details> <details> <summary>🔇 Additional comments (2)</summary> <details> <summary>src/index.ts (2)</summary> `11-11`: **LGTM!** The mongoose import is correctly added. --- `16-43`: **Implementation successfully meets PR objectives!** The changes effectively ensure that: 1. MongoDB connection is attempted before starting the servers 2. Application aborts on connection failure 3. Appropriate error messages are logged This aligns perfectly with the PR objective to "abort startup if not connected to MongoDB server". </details> </details> </details>

src/index.ts

						
				@ -23,2 +21,2 @@

				        cert: fs.readFileSync("static/certs/cert.pem")

				    };

				        const httpPort = config.httpPort || 80;

				        const httpsPort = config.httpsPort || 443;

coderabbitai[bot] (Migrated from github.com) commented

2024-12-29 19:16:15 -08:00

🛠️ Refactor suggestion

Add MongoDB connection options for better reliability.

The current connection setup lacks important options that could improve reliability and error handling. Consider adding connection options to handle timeouts and connection issues gracefully.

Apply this diff:

 mongoose
-    .connect(config.mongodbUrl)
+    .connect(config.mongodbUrl, {
+        connectTimeoutMS: 5000,
+        socketTimeoutMS: 45000,
+        serverSelectionTimeoutMS: 5000,
+        heartbeatFrequencyMS: 10000,
+    })

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

mongoose
    .connect(config.mongodbUrl, {
        connectTimeoutMS: 5000,
        socketTimeoutMS: 45000,
        serverSelectionTimeoutMS: 5000,
        heartbeatFrequencyMS: 10000,
    })
    .then(() => {
        logger.info("Connected to MongoDB");

_:hammer_and_wrench: Refactor suggestion_ **Add MongoDB connection options for better reliability.** The current connection setup lacks important options that could improve reliability and error handling. Consider adding connection options to handle timeouts and connection issues gracefully. Apply this diff: ```diff mongoose - .connect(config.mongodbUrl) + .connect(config.mongodbUrl, { + connectTimeoutMS: 5000, + socketTimeoutMS: 45000, + serverSelectionTimeoutMS: 5000, + heartbeatFrequencyMS: 10000, + }) ```  <details> <summary>📝 Committable suggestion</summary> > ‼️ **IMPORTANT** > Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements. `````suggestion mongoose .connect(config.mongodbUrl, { connectTimeoutMS: 5000, socketTimeoutMS: 45000, serverSelectionTimeoutMS: 5000, heartbeatFrequencyMS: 10000, }) .then(() => { logger.info("Connected to MongoDB"); ````` </details>

src/index.ts

						
				@ -33,1 +33,3 @@

				            );

				                logger.info(

				                    "Access the WebUI in your browser at http://localhost" + (httpPort == 80 ? "" : ":" + httpPort)

				                );

coderabbitai[bot] (Migrated from github.com) commented

2024-12-29 19:16:15 -08:00

🛠️ Refactor suggestion

Add error handling for certificate loading.

The certificate loading could fail but isn't wrapped in a try-catch block. This could lead to an unhandled exception.

Apply this diff:

-        const options = {
-            key: fs.readFileSync("static/certs/key.pem"),
-            cert: fs.readFileSync("static/certs/cert.pem")
-        };
+        let options;
+        try {
+            options = {
+                key: fs.readFileSync("static/certs/key.pem"),
+                cert: fs.readFileSync("static/certs/cert.pem")
+            };
+        } catch (error) {
+            logger.error("Failed to load SSL certificates");
+            process.exit(1);
+        }

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

        let options;
        try {
            options = {
                key: fs.readFileSync("static/certs/key.pem"),
                cert: fs.readFileSync("static/certs/cert.pem")
            };
        } catch (error) {
            logger.error("Failed to load SSL certificates");
            process.exit(1);
        }

_:hammer_and_wrench: Refactor suggestion_ **Add error handling for certificate loading.** The certificate loading could fail but isn't wrapped in a try-catch block. This could lead to an unhandled exception. Apply this diff: ```diff - const options = { - key: fs.readFileSync("static/certs/key.pem"), - cert: fs.readFileSync("static/certs/cert.pem") - }; + let options; + try { + options = { + key: fs.readFileSync("static/certs/key.pem"), + cert: fs.readFileSync("static/certs/cert.pem") + }; + } catch (error) { + logger.error("Failed to load SSL certificates"); + process.exit(1); + } ```  <details> <summary>📝 Committable suggestion</summary> > ‼️ **IMPORTANT** > Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements. `````suggestion let options; try { options = { key: fs.readFileSync("static/certs/key.pem"), cert: fs.readFileSync("static/certs/cert.pem") }; } catch (error) { logger.error("Failed to load SSL certificates"); process.exit(1); } ````` </details>

src/index.ts

coderabbitai[bot] (Migrated from github.com) commented

2024-12-29 19:16:15 -08:00

🛠️ Refactor suggestion

Add error handling for server creation.

If server creation fails, there's no cleanup or error handling in place. Consider adding proper error handling and cleanup logic.

Apply this diff:

-        http.createServer(app).listen(httpPort, () => {
-            logger.info("HTTP server started on port " + httpPort);
-            https.createServer(options, app).listen(httpsPort, () => {
-                logger.info("HTTPS server started on port " + httpsPort);
+        const httpServer = http.createServer(app);
+        const httpsServer = https.createServer(options, app);
+
+        httpServer.on('error', (error) => {
+            logger.error(`HTTP server failed to start: ${error.message}`);
+            process.exit(1);
+        });
+
+        httpsServer.on('error', (error) => {
+            logger.error(`HTTPS server failed to start: ${error.message}`);
+            httpServer.close();
+            process.exit(1);
+        });
+
+        httpServer.listen(httpPort, () => {
+            logger.info(`HTTP server started on port ${httpPort}`);
+            httpsServer.listen(httpsPort, () => {
+                logger.info(`HTTPS server started on port ${httpsPort}`);

Committable suggestion skipped: line range outside the PR's diff.

_:hammer_and_wrench: Refactor suggestion_ **Add error handling for server creation.** If server creation fails, there's no cleanup or error handling in place. Consider adding proper error handling and cleanup logic. Apply this diff: ```diff - http.createServer(app).listen(httpPort, () => { - logger.info("HTTP server started on port " + httpPort); - https.createServer(options, app).listen(httpsPort, () => { - logger.info("HTTPS server started on port " + httpsPort); + const httpServer = http.createServer(app); + const httpsServer = https.createServer(options, app); + + httpServer.on('error', (error) => { + logger.error(`HTTP server failed to start: ${error.message}`); + process.exit(1); + }); + + httpsServer.on('error', (error) => { + logger.error(`HTTPS server failed to start: ${error.message}`); + httpServer.close(); + process.exit(1); + }); + + httpServer.listen(httpPort, () => { + logger.info(`HTTP server started on port ${httpPort}`); + httpsServer.listen(httpsPort, () => { + logger.info(`HTTPS server started on port ${httpsPort}`); ``` > Committable suggestion skipped: line range outside the PR's diff.

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Reference: OpenWF/SpaceNinjaServer#665