Solution: Standardize File Storage Clients
Explore how to implement the Adapter Pattern in Node.js to standardize interfaces across different file storage clients. Understand how to create a StorageAdapter class that wraps incompatible clients, unifying their upload and download methods. This lesson helps you write cleaner, more maintainable backend code by removing client-specific conditionals and enabling consistent interaction with local and cloud storage systems.
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Solution explanation
Lines 2–19: We define two incompatible clients:
localFsusessave()andread()for file operations.s3ClientusesuploadFile()andgetFile().
Lines 22–24: The
StorageAdapterconstructor accepts any client instance.It stores a reference to the wrapped client.
This enables the adapter to forward calls dynamically.
Lines 26–31: The
.upload()method unifies upload behavior.If ...