Design (LLD) Alexa - Machine CodingSubhahu Jain·Jan 4, 2024·8 min readTable of contentsFeatures Required:Design Patterns Involved or Used:DiagramCode ImplementationIssues in Above Design1️⃣ Singleton AlexaCore Is a System-Level BottleneckCurrentWhy This BreaksSolution2️⃣ Observer Pattern Does Not Handle Real-Time Voice StreamsCurrentProblemsSolution3️⃣ Voice Recognition Is Not AtomicHidden ProblemWhat’s MissingSolution4️⃣ NLP Strategy Pattern Is OversimplifiedCurrentMissingSolution5️⃣ State Pattern Is Too NaiveCurrent StatesMissing StatesSolution6️⃣ Command Pattern Ignores AmbiguityCurrentProblemSolution7️⃣ Chain of Responsibility Is Inefficient at ScaleCurrentProblemsSolution8️⃣ Skill Management Is Missing IsolationMissingSolution9️⃣ No Concurrency Model Per UserMissingSolution🔟 No Context Window ManagementMissingSolution1️⃣1️⃣ No Latency BudgetingMissingSolution1️⃣2️⃣ Decorator Pattern Is MisappliedCurrentIssueSolution1️⃣3️⃣ Factory Pattern Is Too Late in the PipelineCurrentIssueSolution1️⃣4️⃣ Composite Pattern Adds Little Value HereIssueSolution1️⃣5️⃣ No Multi-User Profile ResolutionMissingSolution1️⃣6️⃣ No Permission ModelMissingSolution1️⃣7️⃣ No Fault IsolationMissingSolution1️⃣8️⃣ No Telemetry or Learning LoopMissingSolutionProgramming BlogsPythonLLDBeginner DevelopersSystem ArchitectureJavaScriptJavaDeveloperGeneral ProgrammingHTML5learningNode.jsObject Oriented Programmingsoftware developmentTutorial
