Salesforce Apex Design Patterns

  • Singleton: Minimizing object instantiation for improved performance and to mitigate impact of governor limits.
  • Strategy: Defining a family of algorithms, enscapsulating each one and making them interchangeable and selectable at runtime.
  • Decorator: Extending the functionality of an sObject in Apex.
  • Facade: Simplifying the execution of classes with complex interfaces (e.g. web service callouts).
  • Composite: Treating a group of objects in a similar manner to a single instance of that object.
  • Bulk State Transition: Efficiently tracking the change of a field value in a trigger and executing functionality based on this change.

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