P19 Multiple Instances with priori Runtime Knowledge 运行期预先确定多实例

2013-09-14 09:57:43
P19 Multiple Instances with priori Runtime Knowledge 运行期预先确定多实例
Pattern 19 Multiple Instances with Priori Runtime Knowledge 运行期预先确定的多实例 Within a given process instance, multiple instances of a task can be created. The required number of instances may depend on a number of runtime factors, including state data, resource availability and inter-process communications, but is known before the task instances must be created. Once initiated, these instances are independent of each other and run concurrently. It is necessary to synchronize the instances at completion before any subsequent tasks can be triggered. 在一个活动能够被多次激活的这种情况下,在指定情况下的指定活动的实例数量可能取决于情况的特性或者资源的可用性。但是,在活动被创建之前,在运行中的某个阶段,这个数量是可以预知的。一旦所有的实例都完成了,其它的活动应该被启动。
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