allow periodic flushes to Stop being emitted. #146
Merged
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This introduces a new Stop() method and changes the behavior of the Start() method on a store just slightly.
store.Start(), if called while a periodic flush goroutine is currently running, causes the existing goroutine to stop and be replaced with a new goroutine. That is, the caller can now change the rate of flushing with calls such as:
store.Stop() will stop any existing running periodic flush goroutine. If called multiple times, it is a no-op.