Exception Catching

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trigger: manual
description: 
globs: 
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These examples should be used as guidance when configuring Sentry functionality within a project.
# Exception Catching
Use `Sentry.captureException(error)` to capture an exception and log the error in Sentry.
Use this in try catch blocks or areas where exceptions are expected
# Tracing Examples
Spans should be created for meaningful actions within applications like button clicks, API calls, and function calls
Use the `Sentry.startSpan` function to create a span
Child spans can exist within a parent span
## Custom Span instrumentation in component actions
The `name` and `op` properties should be meaningful for the activities in the call.
Attach attributes based on relevant information and metrics from the request
```javascript
function TestComponent() {
  const handleTestButtonClick = () => {
    // Create a transaction/span to measure performance
    Sentry.startSpan(
      {
        op: "ui.click",
        name: "Test Button Click",
      },
      (span) => {
        const value = "some config";
        const metric = "some metric";
        // Metrics can be added to the span
        span.setAttribute("config", value);
        span.setAttribute("metric", metric);
        doSomething();
      },
    );
  };
  return (
    <button type="button" onClick={handleTestButtonClick}>
      Test Sentry
    </button>
  );
}
```
## Custom span instrumentation in API calls
The `name` and `op` properties should be meaningful for the activities in the call.
Attach attributes based on relevant information and metrics from the request
```javascript
async function fetchUserData(userId) {
  return Sentry.startSpan(
    {
      op: "http.client",
      name: `GET /api/users/${userId}`,
    },
    async () => {
      const response = await fetch(`/api/users/${userId}`);
      const data = await response.json();
      return data;
    },
  );
}
```
# Logs
Where logs are used, ensure Sentry is imported using `import * as Sentry from "@sentry/nextjs"`
Enable logging in Sentry using `Sentry.init({ enableLogs: true })`
Reference the logger using `Sentry.logger`
Sentry offers a consoleLoggingIntegration that can be used to log specific console error types automatically without instrumenting the individual logger calls
## Configuration
In NextJS the client side Sentry initialization is in `instrumentation-client.ts`, the server initialization is in `sentry.server.config.ts` and the edge initialization is in `sentry.edge.config.ts`
Initialization does not need to be repeated in other files, it only needs to happen the files mentioned above. You should use `import * as Sentry from "@sentry/nextjs"` to reference Sentry functionality
### Baseline
```javascript
import * as Sentry from "@sentry/nextjs";
Sentry.init({
  dsn: "https://[email protected]/0",
  enableLogs: true,
});
```
### Logger Integration
```javascript
Sentry.init({
  dsn: "https://[email protected]/0",
  integrations: [
    // send console.log, console.error, and console.warn calls as logs to Sentry
    Sentry.consoleLoggingIntegration({ levels: ["log", "error", "warn"] }),
  ],
});
```
## Logger Examples
`logger.fmt` is a template literal function that should be used to bring variables into the structured logs.
```javascript
logger.trace("Starting database connection", { database: "users" });
logger.debug(logger.fmt`Cache miss for user: ${userId}`);
logger.info("Updated profile", { profileId: 345 });
logger.warn("Rate limit reached for endpoint", {
  endpoint: "/api/results/",
  isEnterprise: false,
});
logger.error("Failed to process payment", {
  orderId: "order_123",
  amount: 99.99,
});
logger.fatal("Database connection pool exhausted", {
  database: "users",
  activeConnections: 100,
});
```