review comments

1) Rename firehose to IngestSegment
2) fix segment overlapping, intervals
3) fix overshadow

indexing-service/src/main/java/io/druid/guice/IndexingServiceFirehoseModule.java

@@ -24,7 +24,7 @@ import com.fasterxml.jackson.databind.jsontype.NamedType;
 import com.fasterxml.jackson.databind.module.SimpleModule;
 import com.google.common.collect.ImmutableList;
 import com.google.inject.Binder;
-import io.druid.indexing.firehose.DruidFirehoseFactory;
+import io.druid.indexing.firehose.IngestSegmentFirehoseFactory;
 import io.druid.initialization.DruidModule;
 import io.druid.segment.realtime.firehose.EventReceiverFirehoseFactory;
 
@@ -39,7 +39,7 @@ public class IndexingServiceFirehoseModule implements DruidModule
         new SimpleModule("IndexingServiceFirehoseModule")
             .registerSubtypes(
                 new NamedType(EventReceiverFirehoseFactory.class, "receiver"),
-                new NamedType(DruidFirehoseFactory.class, "druid")
+                new NamedType(IngestSegmentFirehoseFactory.class, "ingestSegment")
             )
     );
   }

indexing-service/src/main/java/io/druid/indexing/firehose/IngestSegmentFirehoseFactory.java

@@ -61,6 +61,7 @@ import io.druid.segment.loading.SegmentLoadingException;
 import io.druid.timeline.DataSegment;
 import io.druid.timeline.TimelineObjectHolder;
 import io.druid.timeline.VersionedIntervalTimeline;
+import io.druid.utils.Runnables;
 import org.joda.time.DateTime;
 import org.joda.time.Interval;
 
@@ -72,9 +73,9 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
-public class DruidFirehoseFactory implements FirehoseFactory<InputRowParser>
+public class IngestSegmentFirehoseFactory implements FirehoseFactory<InputRowParser>
 {
-  private static final EmittingLogger log = new EmittingLogger(DruidFirehoseFactory.class);
+  private static final EmittingLogger log = new EmittingLogger(IngestSegmentFirehoseFactory.class);
   private final String dataSource;
   private final Interval interval;
   private final DimFilter dimFilter;
@@ -83,7 +84,7 @@ public class DruidFirehoseFactory implements FirehoseFactory<InputRowParser>
   private final Injector injector;
 
   @JsonCreator
-  public DruidFirehoseFactory(
+  public IngestSegmentFirehoseFactory(
       @JsonProperty("dataSource") final String dataSource,
       @JsonProperty("interval") Interval interval,
       @JsonProperty("filter") DimFilter dimFilter,
@@ -155,6 +156,9 @@ public class DruidFirehoseFactory implements FirehoseFactory<InputRowParser>
       VersionedIntervalTimeline<String, DataSegment> timeline = new VersionedIntervalTimeline<String, DataSegment>(
           Ordering.<String>natural().nullsFirst()
       );
+      final List<TimelineObjectHolder<String, DataSegment>> timeLineSegments = timeline.lookup(
+          interval
+      );
       for (DataSegment segment : usedSegments) {
         timeline.add(segment.getInterval(), segment.getVersion(), segment.getShardSpec().createChunk(segment));
       }
@@ -163,8 +167,8 @@ public class DruidFirehoseFactory implements FirehoseFactory<InputRowParser>
         dims = dimensions;
       } else {
         Set<String> dimSet = new HashSet<>();
-        for (DataSegment segment : usedSegments) {
-          dimSet.addAll(segment.getDimensions());
+        for (TimelineObjectHolder<String, DataSegment> timelineObjectHolder : timeLineSegments) {
+          dimSet.addAll(timelineObjectHolder.getObject().getChunk(0).getObject().getDimensions());
         }
         dims = Lists.newArrayList(dimSet);
       }
@@ -174,15 +178,15 @@ public class DruidFirehoseFactory implements FirehoseFactory<InputRowParser>
         metricsList = metrics;
       } else {
         Set<String> metricsSet = new HashSet<>();
-        for (DataSegment segment : usedSegments) {
-          metricsSet.addAll(segment.getMetrics());
+        for (TimelineObjectHolder<String, DataSegment> timelineObjectHolder : timeLineSegments) {
+          metricsSet.addAll(timelineObjectHolder.getObject().getChunk(0).getObject().getDimensions());
         }
         metricsList = Lists.newArrayList(metricsSet);
       }
 
 
       final List<StorageAdapter> adapters = Lists.transform(
-          timeline.lookup(new Interval("1000-01-01/3000-01-01")),
+          timeLineSegments,
           new Function<TimelineObjectHolder<String, DataSegment>, StorageAdapter>()
           {
             @Override
@@ -234,11 +238,11 @@ public class DruidFirehoseFactory implements FirehoseFactory<InputRowParser>
           {
             @Nullable
             @Override
-            public Sequence<InputRow> apply(@Nullable StorageAdapter input)
+            public Sequence<InputRow> apply(@Nullable StorageAdapter adapter)
             {
               return Sequences.concat(
                   Sequences.map(
-                      input.makeCursors(
+                      adapter.makeCursors(
                           Filters.convertDimensionFilters(dimFilter),
                           interval,
                           QueryGranularity.ALL
@@ -246,24 +250,24 @@ public class DruidFirehoseFactory implements FirehoseFactory<InputRowParser>
                   {
                     @Nullable
                     @Override
-                    public Sequence<InputRow> apply(@Nullable Cursor input)
+                    public Sequence<InputRow> apply(@Nullable Cursor cursor)
                     {
-                      TimestampColumnSelector timestampColumnSelector = input.makeTimestampColumnSelector();
+                      TimestampColumnSelector timestampColumnSelector = cursor.makeTimestampColumnSelector();
 
                       Map<String, DimensionSelector> dimSelectors = Maps.newHashMap();
                       for (String dim : dims) {
-                        final DimensionSelector dimSelector = input.makeDimensionSelector(dim);
+                        final DimensionSelector dimSelector = cursor.makeDimensionSelector(dim);
                         dimSelectors.put(dim, dimSelector);
                       }
 
                       Map<String, ObjectColumnSelector> metSelectors = Maps.newHashMap();
                       for (String metric : metrics) {
-                        final ObjectColumnSelector metricSelector = input.makeObjectColumnSelector(metric);
+                        final ObjectColumnSelector metricSelector = cursor.makeObjectColumnSelector(metric);
                         metSelectors.put(metric, metricSelector);
                       }
 
                       List<InputRow> rowList = Lists.newArrayList();
-                      while (!input.isDone()) {
+                      while (!cursor.isDone()) {
                         final Map<String, Object> theEvent = Maps.newLinkedHashMap();
                         final long timestamp = timestampColumnSelector.getTimestamp();
                         theEvent.put(EventHolder.timestampKey, new DateTime(timestamp));
@@ -291,7 +295,7 @@ public class DruidFirehoseFactory implements FirehoseFactory<InputRowParser>
                           theEvent.put(metric, selector.get());
                         }
                         rowList.add(new MapBasedInputRow(timestamp, dims, theEvent));
-                        input.advance();
+                        cursor.advance();
                       }
                       return Sequences.simple(rowList);
                     }
@@ -333,14 +337,7 @@ public class DruidFirehoseFactory implements FirehoseFactory<InputRowParser>
     @Override
     public Runnable commit()
     {
-      return new Runnable()
-      {
-        @Override
-        public void run()
-        {
-          // Nothing to do.
-        }
-      };
+      return Runnables.getNoopRunnable();
     }
 
     @Override