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WalkthroughThis update modifies the oRPC procedures middleware to incorporate caching. The middleware’s signature now accepts additional parameters (path, input, output) to facilitate enhanced handling. A unique cache key is generated from the request’s path and input parameters. If caching is enabled via the procedure metadata, the cache is checked first, and a cached result is returned if available; otherwise, the middleware executes the next step, caches the outcome, and then returns it. Additionally, a new variable ( Changes
Sequence Diagram(s)sequenceDiagram
participant C as Client
participant M as Middleware
participant Cache as Cache (db)
participant N as Next Procedure
C->>M: Invoke oRPC procedure (procedure, path, input, output)
M->>Cache: Generate key & check cache (using path, input)
alt Cached result found
Cache-->>M: Return cached result
M->>C: Deliver cached result via output
else No cached result
M->>N: Call next() to get result
N-->>M: Return fresh result
M->>Cache: Store result with generated key
M->>C: Deliver fresh result via output
end
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🧹 Nitpick comments (2)
apps/content/docs/metadata.md (2)
14-14: Caching Storage Initialization Needs ConfirmationThe global variable
dbis declared withdeclare const db: Map<string, unknown>. Ensure that it is properly initialized at runtime (or that a global instance is available) to avoid potentialundefinederrors when accessing cache storage.
27-28: Cache Key Generation Strategy ReviewThe cache key is computed by concatenating
path.join('/')andJSON.stringify(input). Although this approach is straightforward, it can be susceptible to collisions or inconsistencies due to input property ordering. Consider using a more robust key-generation method (for instance, hashing a stringified version with sorted keys) if input objects can vary.
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apps/content/docs/metadata.md (3)
22-24: Extended Middleware Signature and Early Return for Non-Cached ProceduresThe updated middleware now accepts additional parameters (
path,input,output) and checks if caching is enabled viaprocedure['~orpc'].meta.cache. Please verify thatprocedure['~orpc']and itsmetaproperty are always defined to prevent runtime errors and consider adding inline documentation or validations.
29-31: Cache Hit Handling and Output ConsistencyIn the cache-hit block, the code returns the cached value by calling
output(db.get(cacheKey)). Confirm that theoutputfunction is designed to integrate smoothly with this pattern and that the cached data type matches the expected output format. If there’s any risk of type mismatch, adding error handling might be beneficial.
33-35: Cache Miss Flow and Result Caching ValidationOn a cache miss, the middleware retrieves the result via
await next()and cachesresult.output. Ensure that every response fromnext()consistently contains anoutputproperty. If there's a chance thatresult.outputmight be missing or formatted differently, consider adding checks or error handling to safeguard the caching operation.
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