Implement a music streaming service like Spotify - Machine CodingSubhahu Jain·Jul 15, 2023·8 min readTable of contentsFeatures Required:Design Patterns Involved or Used:Code/Solutions:Issues in Above Design1️⃣ Singleton MusicPlayer Is Not Thread-Safe (Critical)Current CodeProblemsReal ImpactSolution2️⃣ Global MusicPlayer Is a Wrong AbstractionConceptual Issue (LLD)Missing AbstractionsConsequencesSolution3️⃣ Playlist Is Not Thread-Safe (Concurrent Modification)CurrentConcurrency ScenariosFailure ModesSolution4️⃣ Composite Pattern Is Misused (Recursive Playback Risk)IssueWhat Goes WrongMissing SafeguardsSolution5️⃣ No Streaming Model (This Is File Playback, Not Streaming)CurrentMissing Core Streaming ConceptsReal Systems UseSolution6️⃣ Offline Mode Is Not Designed At AllFeature ClaimedMissingReal Spotify RuleSolution7️⃣ No Licensing / Rights Enforcement LogicFeature ClaimedMissingReal ConstraintSolution8️⃣ Recommendations Are Not Designed (Major System Gap)Feature ListedRealityMissing Event ModelSolution9️⃣ No Search / Catalog IndexingMissingReal Systems UseSolution🔟 User Authentication Is Plainly UnsafeCurrentProblemsSolution1️⃣1️⃣ No Social Graph ModelingFeature ClaimedMissingSolution1️⃣2️⃣ No Event System (Observer Pattern Unused)ClaimedRealityMissing Use CasesSolution1️⃣3️⃣ No Metrics, No Limits, No ProtectionMissingReal ConstraintSolutionProgramming BlogsPythonJavaScriptWeb DevelopmentCSS
