@InterfaceAudience.Public @InterfaceStability.Evolving public abstract class AbstractPollableSource extends BasicSourceSemantics implements PollableSource
PollableSource.Status
Constructor and Description |
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AbstractPollableSource() |
Modifier and Type | Method and Description |
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protected abstract PollableSource.Status |
doProcess() |
PollableSource.Status |
process()
Attempt to pull an item from the source, sending it to the channel.
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configure, doConfigure, doStart, doStop, getChannelProcessor, getLifecycleState, getName, getStartException, isStarted, setChannelProcessor, setLifecycleState, setName, start, stop, toString
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
getChannelProcessor, setChannelProcessor
getLifecycleState, start, stop
getName, setName
public PollableSource.Status process() throws EventDeliveryException
PollableSource
Attempt to pull an item from the source, sending it to the channel.
When driven by an EventDrivenSourceRunner
process is guaranteed
to be called only by a single thread at a time, with no concurrency.
Any other mechanism driving a pollable source must follow the same
semantics.
process
in interface PollableSource
READY
if one or more events were created from the source.
BACKOFF
if no events could be created from the source.EventDeliveryException
- If there was a failure in delivering to
the attached channel, or if a failure occurred in acquiring data from
the source.protected abstract PollableSource.Status doProcess() throws EventDeliveryException
EventDeliveryException
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