Multiple instances of activity makes workflow management more flexible on handling process, but it causes some problems, such as synchronizing schedule and data sharing confliction. This paper proposes a scheme mode of object pool with lock. In the mode, object pool is constructed for each activity, all instances of the activity are deposited in respective pool, and the schedule scheme is implemented according to the context of activities by taking object pool as a unit. Multi-instance can implement synchronized schedule without confliction by adopting object pool mode. Furthermore, the shared data can be accessed safety by taking the lock scheme into account.
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