| Single Threaded Execution |
| Some methods access data or other shared resources in a way that produces incorrect results if there are concurrent calls to a method and both calls access the data or other resource at the same time. The Single Threaded Execution pattern solves this problem by preventing concurrent calls to the method from resulting in concurrent executions of the method. |
| Two-Phase Termination |
| Provide for the orderly shutdown of a thread or process through the setting of a latch. The thread or process checks the value of the latch at strategic points in its execution. |