Package io.pravega.client.stream.impl

Class ReaderGroupStateManager

java.lang.Object

io.pravega.client.stream.impl.ReaderGroupStateManager

public class ReaderGroupStateManager
extends java.lang.Object

Manages the state of the reader group on behalf of a reader. initializeReader(long) must be called upon reader startup before any other methods. readerShutdown(Position) should be called when the reader is shutting down. After this method is called no other methods should be called on this class. This class updates makes transitions using the ReaderGroupState object. If there are available segments a reader can acquire them by calling acquireNewSegmentsIfNeeded(long, Position). To balance load across multiple readers a reader can release segments so that other readers can acquire them by calling releaseSegment(Segment, long, long, Position). A reader can tell if calling this method is needed by calling findSegmentToReleaseIfRequired() Finally when a segment is sealed it may have one or more successors. So when a reader comes to the end of a segment it should call handleEndOfSegment(SegmentWithRange) so that it can continue reading from the successor to that segment.

Method Summary

Modifier and Type	Method	Description
java.lang.String	getGroupName()
java.lang.String	getReaderId()
java.lang.String	getScope()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getReaderId

public java.lang.String getReaderId()

getScope

public java.lang.String getScope()

getGroupName

public java.lang.String getGroupName()