@InterfaceAudience.Public @InterfaceStability.Evolving public abstract class AbstractPollableSource extends BasicSourceSemantics implements PollableSource
PollableSource.Status| Constructor and Description |
|---|
AbstractPollableSource() |
| Modifier and Type | Method and Description |
|---|---|
void |
configure(Context context)
Request the implementing class to (re)configure itself.
|
protected abstract PollableSource.Status |
doProcess() |
long |
getBackOffSleepIncrement() |
long |
getMaxBackOffSleepInterval() |
PollableSource.Status |
process()
Attempt to pull an item from the source, sending it to the channel.
|
doConfigure, doStart, doStop, getChannelProcessor, getLifecycleState, getName, getStartException, isStarted, setChannelProcessor, setLifecycleState, setName, start, stop, toStringclone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitgetChannelProcessor, setChannelProcessorgetLifecycleState, start, stopgetName, setNamepublic PollableSource.Status process() throws EventDeliveryException
PollableSourceAttempt 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 PollableSourceREADY 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.public void configure(Context context)
ConfigurableRequest the implementing class to (re)configure itself.
When configuration parameters are changed, they must be reflected by the component asap.
There are no thread safety guarantees on when configure might be called.
configure in interface Configurableconfigure in class BasicSourceSemanticspublic long getBackOffSleepIncrement()
getBackOffSleepIncrement in interface PollableSourcepublic long getMaxBackOffSleepInterval()
getMaxBackOffSleepInterval in interface PollableSourceprotected abstract PollableSource.Status doProcess() throws EventDeliveryException
EventDeliveryExceptionCopyright © 2009-2022 Apache Software Foundation. All Rights Reserved.