Design (LLD) Translation service - Machine CodingSubhahu Jain·Dec 30, 2022·7 min readTable of contentsCodeIssues in Above Design1️⃣ TranslationMemory Is NOT Thread-Safe (Critical)Current CodeProblemReal ScenarioSolution2️⃣ Cache Key Design Is Incorrect (Functional Bug)CurrentIssueBug ExampleCorrect Cache Key3️⃣ No Cache Eviction Policy (Memory Leak)MissingImpactSolution4️⃣ TranslationEngine Algorithm Order Is DangerousCurrentProblemsExpected Design5️⃣ Language Detection Is Not DeterministicCurrentIssuesConcurrency IssueSolution6️⃣ Translation Is Not IdempotentProblemIssueExpectedSolution7️⃣ Observer Pattern Is Synchronous (Blocking)CurrentIssueReal SystemsSolution8️⃣ No Request Isolation (Cross-User Pollution)ProblemImpactExpectedSolution9️⃣ No Rate Limiting or Abuse ProtectionMissingAttack ScenarioSolution🔟 No Streaming / Chunked Translation SupportLimitationReal SystemsSolution11️⃣ No Failure Isolation Between AlgorithmsProblemIf One Algorithm:ExpectedSolution12️⃣ Monitoring & Logging Are MissingMissingSolutionJavaScriptPythonCSSProgramming BlogsGeneral Programming
