io.split.engine.segments.SegmentChangeFetcher Maven / Gradle / Ivy
package io.split.engine.segments;
import io.split.client.dtos.SegmentChange;
/**
* Fetches changes in the segment since a reference point.
*
* @author adil
*/
public interface SegmentChangeFetcher {
/**
*
*
* If the segment does not exist, then return the an empty segment change
* with the latest change number set to a value less than 0.
*
*
* If no changes have happened since the change number requested, then return
* an empty segment change with the latest change number equal to the requested
* change number.
*
* @param segmentName the name of the segment to fetch.
* @param changesSinceThisChangeNumber a value less than zero implies that the client is
* requesting information on this segment for the first time.
* @return SegmentChange
* @throws java.lang.RuntimeException if there was a problem fetching segment changes
*/
SegmentChange fetch(String segmentName, long changesSinceThisChangeNumber, boolean addCacheHeader);
}