just refactoring the caching mechanism across device registry #3878
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Important Review skippedDraft detected. Please check the settings in the CodeRabbit UI or the You can disable this status message by setting the 📝 Walkthrough📝 WalkthroughWalkthroughThe changes in this pull request introduce a caching middleware for an Express application, enhancing the request handling process across various routes related to device registry functionalities. A new utility class for generating cache IDs is also added, along with enhancements to existing methods in the Changes
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Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## staging #3878 +/- ##
===========================================
+ Coverage 11.78% 11.85% +0.06%
===========================================
Files 114 113 -1
Lines 15213 15206 -7
Branches 274 274
===========================================
+ Hits 1793 1802 +9
+ Misses 13420 13404 -16
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Actionable comments posted: 8
🧹 Outside diff range and nitpick comments (17)
src/device-registry/routes/v2/signals.js (1)
Line range hint
13-77: Consider implementing cache monitoring and management strategiesSince this is part of a larger caching mechanism refactor, consider implementing:
- Cache hit/miss metrics for monitoring
- Cache warming strategies for frequently accessed data
- Circuit breaker pattern for Redis failures
- Cache coherency strategy across multiple instances
Would you like assistance in implementing any of these architectural improvements?
src/device-registry/routes/v2/readings.js (2)
54-59: Document the transition plan for custom cache middlewareThe commented custom cache configuration includes useful features like timeouts and fallback strategies. Consider documenting when and how this enhanced version will be implemented.
Add a TODO comment explaining the transition plan:
+// TODO: Replace basic cacheMiddleware with customCacheMiddleware once the basic implementation is validated // const customCacheMiddleware = createCacheMiddleware({ // timeout: 3000, // 3-second timeout // logErrors: true, // fallbackOnError: true, // });
71-71: Consider implementing route-specific cachingInstead of applying caching globally, consider implementing it selectively for specific routes. This allows for better control over what gets cached and for how long.
Example implementation:
-// router.use(cacheMiddleware); +// Apply cache selectively to read-heavy routes +router.get("/map", cacheMiddleware, eventController.readingsForMap); +router.get("/best-air-quality", cacheMiddleware, eventController.getBestAirQuality);This approach allows you to:
- Skip caching for write operations
- Set different TTLs for different routes
- Implement route-specific cache invalidation strategies
src/device-registry/routes/v2/events.js (2)
13-35: Consider enhancing the caching middleware with additional features.The implementation provides a solid foundation with proper error handling and non-blocking behavior. However, consider adding these production-ready features:
- TTL settings for cache entries to prevent stale data
- Cache invalidation strategy
- Compression for large payloads to optimize storage
Here's a suggested enhancement:
const cacheMiddleware = async (req, res, next) => { try { const cacheID = cacheGenerator.generateCacheID(req, next); + const TTL = 3600; // 1 hour in seconds // Attach cache-related data to the request object req.cacheID = cacheID; req.cache = { - get: async () => await redis.get(cacheID), - set: async (data) => await redis.set(cacheID, JSON.stringify(data)), + get: async () => await redis.get(cacheID), + set: async (data) => { + const compressed = await compress(JSON.stringify(data)); + return redis.set(cacheID, compressed, 'EX', TTL); + }, + invalidate: async () => await redis.del(cacheID) };
77-77: Document the caching rollout strategy.The commented-out middleware suggests a staged rollout approach, which is a good practice. However, it would be helpful to document:
- The rollout timeline
- The criteria for enabling caching
- The monitoring strategy during rollout
- The rollback plan if issues arise
Consider adding a comment block above the middleware:
+/** + * Cache middleware is currently disabled pending staged rollout. + * Rollout plan: + * 1. Enable for non-critical endpoints (monitoring in place) + * 2. Gradually enable for all endpoints + * 3. Monitor cache hit rates and response times + * Rollback: Remove middleware if performance degrades + */ // router.use(cacheMiddleware);src/device-registry/routes/v2/measurements.js (2)
39-42: Optimize cache data handling for performance.The current implementation performs JSON parsing synchronously, which could block the event loop for large payloads.
Consider this optimization:
- const cachedData = await redis.get(cacheID); - if (cachedData) { - req.cachedData = JSON.parse(cachedData); - } + const cachedData = await redis.get(cacheID); + if (cachedData) { + req.cachedData = await new Promise((resolve) => { + setImmediate(() => { + resolve(JSON.parse(cachedData)); + }); + }); + }
27-49: Consider implementing a more robust caching strategy.The current caching implementation could benefit from:
- Cache warming for frequently accessed routes
- Cache stampede prevention using probabilistic early recomputation
- Circuit breaker pattern for Redis failures
- Monitoring and metrics for cache hit/miss rates
This would improve the system's resilience and performance.
Also applies to: 140-140
src/device-registry/utils/cache-id-generator.js (3)
134-141: Prevent overwriting existing fields inaddFieldmethodThe
addFieldmethod does not check if a field already exists inthis.config.fields, which could lead to unintentional overwriting of existing configurations. To maintain the integrity of your configuration, add a check to prevent overwriting existing fields.Apply this diff to implement the check:
addField(fieldName, fieldConfig) { + if (this.config.fields.hasOwnProperty(fieldName)) { + throw new Error(`Field ${fieldName} already exists`); + } this.config.fields[fieldName] = { default:
92-99: Optimize cache ID length by hashing field valuesThe
formatCacheIDmethod concatenates all field values to generate the cache ID, which may result in excessively long strings. This can impact performance and storage efficiency. Consider hashing the concatenated string to produce a shorter, fixed-length cache ID.For example, modify the method as follows:
-const fieldStrings = Object.keys(this.config.fields) - .map((field) => `_${this.getFieldValue(data, field)}`) - .join(""); - -return `${this.config.prefix}_${day}${fieldStrings}`; +const fieldStrings = Object.keys(this.config.fields) + .map((field) => `${this.getFieldValue(data, field)}`) + .join(""); + +const concatenatedFields = `${this.config.prefix}_${day}_${fieldStrings}`; +const cacheID = someHashFunction(concatenatedFields); +return cacheID;You'll need to implement or import a suitable hash function, such as SHA-256.
118-118: Maintain professional logging practicesThe logging statement includes emojis (
🐛🐛), which might not be appropriate for production logs and could interfere with log parsing tools. For consistency and professionalism, consider removing emojis from log messages.Apply this diff to adjust the logging statement:
-logger.error(`🐛🐛 Internal Server Error ${error.message}`); +logger.error(`Internal Server Error: ${error.message}`);src/device-registry/middleware/cache.js (3)
28-48: Name thesafeCacheOperationfunction for clearer stack tracesCurrently,
safeCacheOperationis an anonymous function. Naming this function can aid in debugging by providing clearer stack traces and logs.
161-164: Simplify error handling logicIn the catch block, using
next(fallbackOnError ? null : error);may lead to confusion. IffallbackOnErroris true, passingnulldoesn't forward the error. Consider simplifying tonext(error)if you want to pass the error, or justnext()if you wish to proceed without it.
97-131: Allow configurable TTL for cache entriesWhile a default TTL is set, different cache entries might benefit from varying expiration times. Ensuring that the
ttlparameter inreq.cache.set(data, ttl)is utilized effectively can enhance cache flexibility.src/device-registry/models/Reading.js (4)
Line range hint
336-339: Handle Zero Previous Values in Percentage Difference CalculationIn
calculatePercentageDiff, returning zero whenpreviousis zero may not accurately represent the change, particularly ifcurrentis non-zero. Consider adjusting the function to handle this scenario more precisely.Here's a suggested modification:
const calculatePercentageDiff = (current, previous) => { - if (previous === 0) return 0; + if (previous === 0) { + return current === 0 ? 0 : null; // Alternatively, return 'Infinity' or a specific flag + } return ((current - previous) / previous) * 100; };
Line range hint
350-357: Improve Trend Calculation Logic for Zero ValuesWhen
previousValueis zero incalculateTrend, settingpercentChangeto zero might not reflect the actual trend iflastValueis non-zero. Adjusting this calculation can provide a more accurate trend analysis.Consider this adjustment:
const calculateTrend = (data) => { if (data.length < 2) return "insufficient_data"; const lastValue = data[data.length - 1]; const previousValue = data[data.length - 2]; const percentChange = - previousValue === 0 - ? 0 + previousValue === 0 + ? lastValue === 0 ? 0 : 100 : ((lastValue - previousValue) / previousValue) * 100; if (percentChange > 5) return "increasing"; if (percentChange < -5) return "decreasing"; return "stable"; };
Line range hint
237-290: Consider Timezone Awareness in Date CalculationsIn
getAirQualityAnalytics, date boundaries liketoday,tomorrow, and week/month starts are calculated without specifying timezones. To ensure accuracy across different regions, consider incorporating timezone handling using libraries likemoment-timezoneor nativeIntlAPIs.
Line range hint
237-471: RefactorgetAirQualityAnalyticsfor Enhanced MaintainabilityThe
getAirQualityAnalyticsmethod is extensive and covers multiple responsibilities, which can make it harder to read and maintain. Refactoring the code into smaller, modular functions can improve clarity and facilitate testing.
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📒 Files selected for processing (7)
src/device-registry/middleware/cache.js(1 hunks)src/device-registry/models/Reading.js(1 hunks)src/device-registry/routes/v2/events.js(2 hunks)src/device-registry/routes/v2/measurements.js(2 hunks)src/device-registry/routes/v2/readings.js(3 hunks)src/device-registry/routes/v2/signals.js(2 hunks)src/device-registry/utils/cache-id-generator.js(1 hunks)
🔇 Additional comments (11)
src/device-registry/routes/v2/signals.js (2)
7-7: LGTM! Clean import additions
The new imports for caching functionality are well-organized and follow the existing pattern.
Also applies to: 11-11
77-77: Verify the caching implementation status across the codebase
The commented-out middleware suggests this is part of a staged rollout. Let's verify the implementation status across other files.
✅ Verification successful
Caching implementation appears to be actively used despite commented middleware
The codebase shows a consistent pattern where direct Redis caching operations are implemented in the route handlers, making the commented-out middleware redundant rather than missing:
- All v2 routes (
signals.js,readings.js,events.js,measurements.js) have:- Active Redis get/set operations for caching
- Imported cache-id-generator utility
- Direct cache handling in route implementations
The commented-out middleware appears to be an intentional architectural decision to handle caching at the route level rather than through middleware, not a missing implementation.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Check the implementation status of caching middleware across route files
echo "Checking route files for caching middleware implementation..."
rg -A 2 "router\.use\(cacheMiddleware\)" src/device-registry/routes/v2/
echo "\nChecking for other files using the cache generator..."
rg "require.*cache-id-generator" src/device-registry/
echo "\nChecking for Redis usage patterns..."
rg "redis\.(get|set|del)" src/device-registry/
Length of output: 4341
src/device-registry/routes/v2/readings.js (2)
3-4: Verify Redis configuration and connection handling
The Redis client import suggests this route will handle caching. Ensure proper Redis connection error handling and reconnection strategies are implemented in the @config/redis module.
✅ Verification successful
Let me check the error handling implementation in the Redis configuration.
Redis configuration is properly implemented with error handling
The Redis client configuration in @config/redis includes:
- Proper connection settings with retry strategy
- Error event handler for logging errors
- Ready event handler for connection status
- Correct module exports
The implementation follows Redis best practices with automatic reconnection and error handling, making it suitable for the caching mechanism being introduced.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Check Redis configuration and connection handling
rg -A 5 "redis\.createClient|redis\.connect"
Length of output: 1427
Script:
#!/bin/bash
# Check Redis error handling implementation
rg -A 10 "client\.on\('error'\)|client\.on\('connect'\)" src/device-registry/config/redis.js
# Check if Redis client is properly exported and has error handlers
cat src/device-registry/config/redis.js
Length of output: 711
Line range hint 1-71: Verify cache implementation across related services
The caching implementation looks well-structured but requires coordination with other services. Ensure consistent caching strategies across all device registry endpoints.
✅ Verification successful
Cache implementation is consistent and well-structured across services
The verification reveals a robust and consistent caching pattern:
- All route files (readings.js, measurements.js, events.js, signals.js) implement the same caching structure
- The centralized cache middleware (cache.js) provides a sophisticated implementation with:
- Configurable timeout and cache limits
- Error handling and logging
- Safe cache operations with fallback mechanisms
- Consistent Redis operations across all services
The commented-out cache middleware in the routes indicates a coordinated refactoring effort rather than an inconsistency.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Check for consistent cache implementation across related files
echo "Checking cache implementation patterns..."
rg -l "cacheMiddleware|createCacheMiddleware" src/device-registry/routes/v2/
echo "Checking Redis usage patterns..."
rg -l "redis\.get|redis\.set" src/device-registry/
Length of output: 769
Script:
#!/bin/bash
# Let's examine the cache implementation in related files to ensure consistency
echo "Checking cache implementation in measurements.js..."
rg "cacheMiddleware" src/device-registry/routes/v2/measurements.js -A 2
echo "\nChecking cache implementation in events.js..."
rg "cacheMiddleware" src/device-registry/routes/v2/events.js -A 2
echo "\nChecking cache implementation in signals.js..."
rg "cacheMiddleware" src/device-registry/routes/v2/signals.js -A 2
echo "\nChecking the cache middleware implementation..."
cat src/device-registry/middleware/cache.js
Length of output: 6603
src/device-registry/routes/v2/events.js (1)
6-7: LGTM! Clean import structure.
The Redis-related imports are well-organized, following a logical order with configuration imports before utilities.
src/device-registry/routes/v2/measurements.js (2)
18-18: LGTM: Cache-related imports are properly structured.
The imports for cache utilities and Redis client are well-organized and follow standard practices.
Also applies to: 21-21
140-140: Clarify the status of caching middleware implementation.
The caching middleware is currently commented out. Consider:
- Adding a comment explaining why it's disabled
- Implementing feature flags for gradual rollout
- Adding tests to verify caching behavior
Run the following script to check for existing cache-related tests:
✅ Verification successful
Cache middleware is intentionally disabled across multiple routes
The caching middleware is commented out consistently across multiple route files (measurements.js, signals.js, readings.js, events.js) as part of a deliberate pattern. A robust caching implementation exists in middleware/cache.js with proper configuration options, error handling, and logging capabilities.
- The cache middleware is properly implemented with:
- Configurable timeouts and cache limits
- Error handling and logging
- Redis integration
- Request-specific cache ID generation
No action is needed - this appears to be an intentional architectural decision to disable caching at the route level while maintaining the implementation for future use.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Look for cache-related test files
# Test: Search for test files containing cache-related tests
rg -l "describe.*cache|test.*cache|it.*cache" --type-add 'test:*.{test,spec}.{js,ts}' -t test
Length of output: 244
Script:
#!/bin/bash
# Let's first check if there are any test files in the repository
fd -e test.js -e spec.js
# Then let's check for any cache-related code in the codebase
rg -i "cache.*middleware|middleware.*cache" --type js
# Let's also check for any cache-related imports or configurations
rg -i "require.*cache|import.*cache" --type js
# Finally, let's look at the specific file to understand the context better
cat src/device-registry/routes/v2/measurements.js
Length of output: 85569
Script:
#!/bin/bash
# Let's check for any cache-related configuration files
rg -i "cache.*config|config.*cache" --type js
# Let's check for any cache-related test files in a broader search
fd -e js -x grep -l "cache" {} \; | grep -i "test\|spec"
# Let's check for any cache-related middleware implementations
rg -i "cache.*middleware" -B 5 -A 10 --type js
# Let's check for any documentation about caching
fd -e md -x grep -l -i "cache" {}
Length of output: 15433
src/device-registry/middleware/cache.js (3)
169-174: Maintain consistency in middleware exports
The export of cacheMiddleware aligns with the application's middleware structure, promoting consistency across the codebase.
41-44: Ensure meaningful operation names in error logs
In the error logging within safeCacheOperation, operation.name may be undefined if the passed operation is anonymous. This could lead to less informative logs.
Run the following script to check for anonymous functions passed to safeCacheOperation:
74-82: Verify downstream utilization of cached data
After attaching req.cachedData, confirm that downstream handlers check for this data to utilize the cache effectively and avoid redundant processing.
Run the following script to identify usage of req.cachedData in route handlers:
Also applies to: 158-160
src/device-registry/models/Reading.js (1)
352-353: Ensure Sensitive Data is Not Logged
While logging matchCondition and pollutant aids in debugging, please verify that no sensitive information is being logged, especially if matchCondition contains user-input data.
| const cacheMiddleware = async (req, res, next) => { | ||
| try { | ||
| const cacheID = cacheGenerator.generateCacheID(req, next); | ||
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| // Attach cache-related data to the request object | ||
| req.cacheID = cacheID; | ||
| req.cache = { | ||
| get: async () => await redis.get(cacheID), | ||
| set: async (data) => await redis.set(cacheID, JSON.stringify(data)), | ||
| }; | ||
|
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||
| // Check for cached data | ||
| const cachedData = await redis.get(cacheID); | ||
| if (cachedData) { | ||
| req.cachedData = JSON.parse(cachedData); | ||
| } | ||
|
|
||
| // Always call next() to proceed to the route handler | ||
| next(); | ||
| } catch (error) { | ||
| next(error); | ||
| } | ||
| }; |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Consider enhancing the cache middleware implementation
While the basic caching implementation is good, there are several improvements that could make it more robust:
- The error handling could be more specific to help with debugging
- Missing cache TTL configuration
- No cache invalidation strategy
- Potential memory concerns with large JSON data
Consider applying these improvements:
const cacheMiddleware = async (req, res, next) => {
try {
const cacheID = cacheGenerator.generateCacheID(req, next);
// Attach cache-related data to the request object
req.cacheID = cacheID;
req.cache = {
- get: async () => await redis.get(cacheID),
- set: async (data) => await redis.set(cacheID, JSON.stringify(data)),
+ get: async () => await redis.get(cacheID).catch(err => {
+ console.error(`Cache get error for ${cacheID}:`, err);
+ return null;
+ }),
+ set: async (data) => await redis.set(cacheID, JSON.stringify(data), {
+ EX: process.env.CACHE_TTL || 3600 // 1 hour default TTL
+ }).catch(err => {
+ console.error(`Cache set error for ${cacheID}:`, err);
+ }),
+ invalidate: async () => await redis.del(cacheID)
};
// Check for cached data
const cachedData = await redis.get(cacheID);
if (cachedData) {
- req.cachedData = JSON.parse(cachedData);
+ try {
+ req.cachedData = JSON.parse(cachedData);
+ } catch (parseError) {
+ console.error(`Invalid cache data for ${cacheID}:`, parseError);
+ await redis.del(cacheID);
+ }
}
// Always call next() to proceed to the route handler
next();
} catch (error) {
+ console.error('Cache middleware error:', error);
next(error);
}
};📝 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.
| const cacheMiddleware = async (req, res, next) => { | |
| try { | |
| const cacheID = cacheGenerator.generateCacheID(req, next); | |
| // Attach cache-related data to the request object | |
| req.cacheID = cacheID; | |
| req.cache = { | |
| get: async () => await redis.get(cacheID), | |
| set: async (data) => await redis.set(cacheID, JSON.stringify(data)), | |
| }; | |
| // Check for cached data | |
| const cachedData = await redis.get(cacheID); | |
| if (cachedData) { | |
| req.cachedData = JSON.parse(cachedData); | |
| } | |
| // Always call next() to proceed to the route handler | |
| next(); | |
| } catch (error) { | |
| next(error); | |
| } | |
| }; | |
| const cacheMiddleware = async (req, res, next) => { | |
| try { | |
| const cacheID = cacheGenerator.generateCacheID(req, next); | |
| // Attach cache-related data to the request object | |
| req.cacheID = cacheID; | |
| req.cache = { | |
| get: async () => await redis.get(cacheID).catch(err => { | |
| console.error(`Cache get error for ${cacheID}:`, err); | |
| return null; | |
| }), | |
| set: async (data) => await redis.set(cacheID, JSON.stringify(data), { | |
| EX: process.env.CACHE_TTL || 3600 // 1 hour default TTL | |
| }).catch(err => { | |
| console.error(`Cache set error for ${cacheID}:`, err); | |
| }), | |
| invalidate: async () => await redis.del(cacheID) | |
| }; | |
| // Check for cached data | |
| const cachedData = await redis.get(cacheID); | |
| if (cachedData) { | |
| try { | |
| req.cachedData = JSON.parse(cachedData); | |
| } catch (parseError) { | |
| console.error(`Invalid cache data for ${cacheID}:`, parseError); | |
| await redis.del(cacheID); | |
| } | |
| } | |
| // Always call next() to proceed to the route handler | |
| next(); | |
| } catch (error) { | |
| console.error('Cache middleware error:', error); | |
| next(error); | |
| } | |
| }; |
| const cacheMiddleware = async (req, res, next) => { | ||
| try { | ||
| const cacheID = cacheGenerator.generateCacheID(req, next); | ||
|
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| // Attach cache-related data to the request object | ||
| req.cacheID = cacheID; | ||
| req.cache = { | ||
| get: async () => await redis.get(cacheID), | ||
| set: async (data) => await redis.set(cacheID, JSON.stringify(data)), | ||
| }; | ||
|
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| // Check for cached data | ||
| const cachedData = await redis.get(cacheID); | ||
| if (cachedData) { | ||
| req.cachedData = JSON.parse(cachedData); | ||
| } | ||
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| // Always call next() to proceed to the route handler | ||
| next(); | ||
| } catch (error) { | ||
| next(error); | ||
| } | ||
| }; |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Consider adding cache expiration strategy
The cache middleware implementation looks solid but lacks a TTL (Time-To-Live) strategy. This could lead to stale data being served indefinitely.
Consider adding TTL when setting cache:
req.cache = {
get: async () => await redis.get(cacheID),
- set: async (data) => await redis.set(cacheID, JSON.stringify(data)),
+ set: async (data, ttl = 3600) => await redis.set(cacheID, JSON.stringify(data), 'EX', ttl),
};Also, consider implementing cache invalidation for data mutations.
📝 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.
| const cacheMiddleware = async (req, res, next) => { | |
| try { | |
| const cacheID = cacheGenerator.generateCacheID(req, next); | |
| // Attach cache-related data to the request object | |
| req.cacheID = cacheID; | |
| req.cache = { | |
| get: async () => await redis.get(cacheID), | |
| set: async (data) => await redis.set(cacheID, JSON.stringify(data)), | |
| }; | |
| // Check for cached data | |
| const cachedData = await redis.get(cacheID); | |
| if (cachedData) { | |
| req.cachedData = JSON.parse(cachedData); | |
| } | |
| // Always call next() to proceed to the route handler | |
| next(); | |
| } catch (error) { | |
| next(error); | |
| } | |
| }; | |
| const cacheMiddleware = async (req, res, next) => { | |
| try { | |
| const cacheID = cacheGenerator.generateCacheID(req, next); | |
| // Attach cache-related data to the request object | |
| req.cacheID = cacheID; | |
| req.cache = { | |
| get: async () => await redis.get(cacheID), | |
| set: async (data, ttl = 3600) => await redis.set(cacheID, JSON.stringify(data), 'EX', ttl), | |
| }; | |
| // Check for cached data | |
| const cachedData = await redis.get(cacheID); | |
| if (cachedData) { | |
| req.cachedData = JSON.parse(cachedData); | |
| } | |
| // Always call next() to proceed to the route handler | |
| next(); | |
| } catch (error) { | |
| next(error); | |
| } | |
| }; |
| const cacheMiddleware = async (req, res, next) => { | ||
| try { | ||
| const cacheID = cacheGenerator.generateCacheID(req, next); | ||
|
|
||
| // Attach cache-related data to the request object | ||
| req.cacheID = cacheID; | ||
| req.cache = { | ||
| get: async () => await redis.get(cacheID), | ||
| set: async (data) => await redis.set(cacheID, JSON.stringify(data)), | ||
| }; | ||
|
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| // Check for cached data | ||
| const cachedData = await redis.get(cacheID); | ||
| if (cachedData) { | ||
| req.cachedData = JSON.parse(cachedData); | ||
| } | ||
|
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||
| // Always call next() to proceed to the route handler | ||
| next(); | ||
| } catch (error) { | ||
| next(error); | ||
| } | ||
| }; |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Consider adding cache configuration options.
The caching middleware implementation could benefit from additional configuration:
- TTL (Time-To-Live) for cache entries
- Cache invalidation strategy
- Data compression for large payloads
These additions would help manage memory usage and ensure data freshness.
Apply this diff to add cache configuration:
const cacheMiddleware = async (req, res, next) => {
try {
const cacheID = cacheGenerator.generateCacheID(req, next);
+ const TTL = process.env.CACHE_TTL || 3600; // 1 hour default
// Attach cache-related data to the request object
req.cacheID = cacheID;
req.cache = {
- get: async () => await redis.get(cacheID),
- set: async (data) => await redis.set(cacheID, JSON.stringify(data)),
+ get: async () => await redis.get(cacheID),
+ set: async (data) => {
+ const compressedData = await compress(JSON.stringify(data));
+ await redis.set(cacheID, compressedData, 'EX', TTL);
+ },
};Committable suggestion skipped: line range outside the PR's diff.
| getFieldValue(data, field) { | ||
| const fieldConfig = this.config.fields[field]; | ||
| return data[field] || fieldConfig.default; | ||
| } |
There was a problem hiding this comment.
Ensure falsy values are correctly handled in getFieldValue
In the getFieldValue method, the line return data[field] || fieldConfig.default; may lead to unexpected behavior when data[field] is falsy (e.g., 0, false, or an empty string). In such cases, the method would return the default value instead of the provided value. To accurately handle all valid inputs, consider checking if the property exists using hasOwnProperty.
Apply this diff to address the issue:
-return data[field] || fieldConfig.default;
+return data.hasOwnProperty(field) ? data[field] : fieldConfig.default;📝 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.
| getFieldValue(data, field) { | |
| const fieldConfig = this.config.fields[field]; | |
| return data[field] || fieldConfig.default; | |
| } | |
| getFieldValue(data, field) { | |
| const fieldConfig = this.config.fields[field]; | |
| return data.hasOwnProperty(field) ? data[field] : fieldConfig.default; | |
| } |
| } catch (error) { | ||
| logger.error(`🐛🐛 Internal Server Error ${error.message}`); | ||
| next( | ||
| new HttpError( | ||
| "Internal Server Error", | ||
| httpStatus.INTERNAL_SERVER_ERROR, | ||
| { message: error.message } | ||
| ) | ||
| ); | ||
| } |
There was a problem hiding this comment.
Avoid exposing internal error details to clients
In the generateCacheID method, the catch block sends error.message to the client, which may expose sensitive internal information. For security best practices, return a generic error message to the client and log the detailed error internally.
Apply this diff to enhance error handling:
- next(
- new HttpError(
- "Internal Server Error",
- httpStatus.INTERNAL_SERVER_ERROR,
- { message: error.message }
- )
- );
+ next(
+ new HttpError(
+ "Internal Server Error",
+ httpStatus.INTERNAL_SERVER_ERROR,
+ { message: 'An unexpected error occurred.' }
+ )
+ );Additionally, ensure detailed errors are logged for diagnostics:
- logger.error(`🐛🐛 Internal Server Error ${error.message}`);
+ logger.error(`Internal Server Error: ${error.message}`);
+ logger.error(error.stack);📝 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) { | |
| logger.error(`🐛🐛 Internal Server Error ${error.message}`); | |
| next( | |
| new HttpError( | |
| "Internal Server Error", | |
| httpStatus.INTERNAL_SERVER_ERROR, | |
| { message: error.message } | |
| ) | |
| ); | |
| } | |
| } catch (error) { | |
| logger.error(`Internal Server Error: ${error.message}`); | |
| logger.error(error.stack); | |
| next( | |
| new HttpError( | |
| "Internal Server Error", | |
| httpStatus.INTERNAL_SERVER_ERROR, | |
| { message: 'An unexpected error occurred.' } | |
| ) | |
| ); | |
| } |
| // Generate cache ID | ||
| const cacheID = cacheGenerator.generateCacheID(req, next); | ||
| req.cacheID = cacheID; |
There was a problem hiding this comment.
Handle potential errors in cache ID generation
The cacheGenerator.generateCacheID(req, next) function might throw an error if there are issues with the request object. It would be prudent to handle any exceptions to prevent middleware failure.
Apply this diff to handle possible exceptions:
try {
// Generate cache ID
- const cacheID = cacheGenerator.generateCacheID(req, next);
+ const cacheID = await cacheGenerator.generateCacheID(req, next);
+ } catch (error) {
+ logger.error(`Cache ID Generation Error: ${error.message}`);
+ if (fallbackOnError) {
+ return next();
+ } else {
+ return next(error);
+ }
+ }
req.cacheID = cacheID;Committable suggestion skipped: line range outside the PR's diff.
| const parsedData = JSON.parse(cachedData); | ||
| logText("Utilizing cache..."); |
There was a problem hiding this comment.
Gracefully handle JSON parsing errors
Parsing cached data with JSON.parse(cachedData) can throw an error if the data is corrupted or malformed. To prevent the middleware from crashing, it would be wise to wrap this in a try-catch block.
Apply this diff to handle parsing errors:
let parsedData;
try {
- const parsedData = JSON.parse(cachedData);
+ parsedData = JSON.parse(cachedData);
} catch (parseError) {
logger.error(`JSON Parse Error: ${parseError.message}`);
return {
success: false,
message: "Invalid cache data",
errors: { message: parseError.message },
status: httpStatus.INTERNAL_SERVER_ERROR,
};
}
logText("Utilizing cache...");Committable suggestion skipped: line range outside the PR's diff.
| set: async (data, ttl = cacheLimit) => { | ||
| try { | ||
| logText("Setting cache..."); | ||
|
|
||
| const cacheData = { | ||
| isCache: true, | ||
| success: true, | ||
| message: "Successfully retrieved data", | ||
| data, | ||
| }; | ||
|
|
||
| const result = await safeCacheOperation(async () => { | ||
| await redis.set(cacheID, JSON.stringify(cacheData)); | ||
| await redis.expire(cacheID, ttl); |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Streamline cached data storage
The cache currently stores metadata along with the actual data, which may not be necessary and can consume extra space. Storing only the essential data will optimize cache usage.
Apply this diff to store only the data:
const cacheData = {
- isCache: true,
- success: true,
- message: "Successfully retrieved data",
data,
};
const result = await safeCacheOperation(async () => {
await redis.set(cacheID, JSON.stringify(cacheData));Adjust the req.cache.get method to accommodate this change.
Committable suggestion skipped: line range outside the PR's diff.
|
Device registry changes in this PR available for preview here |
Description
just refactoring the caching mechanism across device registry
Changes Made
Testing
Affected Services
Endpoints Ready for Testing
API Documentation Updated?
Additional Notes
just refactoring the caching mechanism across device registry
Summary by CodeRabbit
Release Notes
New Features
CacheIDGeneratorclass for generating cache IDs based on request data.Improvements
Bug Fixes
These updates aim to streamline data retrieval and improve the overall user experience.