P05 Single Merge 单合并

Pattern 5: Single Merge 单合并 The convergence of two or more branches into a single subsequent branch such that each enablement of an incoming branch results in the thread of control being passed to the subsequent branch. 流程中的一个点在两个或者多个分支发生非同步的汇合时执行，并假设这些分支中不存在平行执行的情况。