BufferOverflow

A strategy for buffer overflow handling in channels and flows that controls what is going to be sacrificed on buffer overflow:

• SUSPEND — the upstream that is sending or is emitting a value is suspended while the buffer is full.

• DROP_OLDEST — drop the oldest value in the buffer on overflow, add the new value to the buffer, do not suspend.

• DROP_LATEST — drop the latest value that is being added to the buffer right now on buffer overflow (so that buffer contents stay the same), do not suspend.