Chapter 10: Polymorphic storage

This chapter explains using implicit interfaces to decouple storage from its consumers and highlights consumer-defined interfaces.

Topics covered

• Interacting with SQL databases
• Understanding the driver pattern
• Integration-testing external services
• Leveraging consumer-driven interface approach

Sections

Section 1: Interacting with SQL databases

• Listing 10.1: Registering the SQLite driver
• Listing 10.2: Dialing the database
• Listing 10.3: Defining the SQL schema
• Listing 10.4: Applying the schema

Section 2: Database-backed service

• Listing 10.5: Shortening links
• Listing 10.6: Adding a test database helper
• Listing 10.7: Testing Shortener.Shorten
• Listing 10.8: Detecting constraint errors
• Listing 10.9: Detecting duplicate keys
• Listing 10.10: Resolving links

Section 3: Valuer and Scanner

• Listing 10.11: Valuer and Scanner
• Listing 10.12: Using base64String

Section 4: Implicit interfaces

• Listing 10.13: Declaring interfaces
• Listing 10.14: Integrating sqlite.Shortener