Also known as

• Change Tracking
• Is-Modified Flag

Intent

The Dirty Flag design pattern is employed to avoid unnecessary computations or resource-heavy operations by maintaining a boolean flag that tracks whether the state of an object has changed ('dirty') or remains unchanged ('clean'). This flag, when set, indicates that a particular operation, such as recalculating or refreshing data, needs to be performed again to reflect the updated state.

Also known as

• Around Method Pattern
• Resource Block Management

Intent

Execute Around idiom frees the user from certain actions that should always be executed before and after the business method. A good example of this is resource allocation and deallocation leaving the user to specify only what to do with the resource.

Also known as

• Conditional Block
• Suspended Execution

Intent

The Guarded Suspension pattern manages operations that require both a lock and a condition to proceed, allowing a thread to wait for an appropriate condition while being efficient with resource use.