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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.regionserver.querymatcher;
import java.io.IOException;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.PrivateCellUtil;
import org.apache.hadoop.hbase.KeepDeletedCells;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.regionserver.ScanInfo;
/**
* Query matcher for normal user scan.
*/
@InterfaceAudience.Private
public abstract class NormalUserScanQueryMatcher extends UserScanQueryMatcher {
/** Keeps track of deletes */
private final DeleteTracker deletes;
/** True if we are doing a 'Get' Scan. Every Get is actually a one-row Scan. */
private final boolean get;
/** whether time range queries can see rows "behind" a delete */
protected final boolean seePastDeleteMarkers;
protected NormalUserScanQueryMatcher(Scan scan, ScanInfo scanInfo, ColumnTracker columns,
boolean hasNullColumn, DeleteTracker deletes, long oldestUnexpiredTS, long now) {
super(scan, scanInfo, columns, hasNullColumn, oldestUnexpiredTS, now);
this.deletes = deletes;
this.get = scan.isGetScan();
this.seePastDeleteMarkers = scanInfo.getKeepDeletedCells() != KeepDeletedCells.FALSE;
}
@Override
public void beforeShipped() throws IOException {
super.beforeShipped();
deletes.beforeShipped();
}
@Override
public MatchCode match(Cell cell) throws IOException {
if (filter != null && filter.filterAllRemaining()) {
return MatchCode.DONE_SCAN;
}
MatchCode returnCode = preCheck(cell);
if (returnCode != null) {
return returnCode;
}
long timestamp = cell.getTimestamp();
byte typeByte = cell.getTypeByte();
if (PrivateCellUtil.isDelete(typeByte)) {
boolean includeDeleteMarker = seePastDeleteMarkers ? tr.withinTimeRange(timestamp)
: tr.withinOrAfterTimeRange(timestamp);
if (includeDeleteMarker) {
this.deletes.add(cell);
}
return MatchCode.SKIP;
}
returnCode = checkDeleted(deletes, cell);
if (returnCode != null) {
return returnCode;
}
return matchColumn(cell, timestamp, typeByte);
}
@Override
protected void reset() {
deletes.reset();
}
@Override
protected boolean isGet() {
return get;
}
public static NormalUserScanQueryMatcher create(Scan scan, ScanInfo scanInfo,
ColumnTracker columns, DeleteTracker deletes, boolean hasNullColumn, long oldestUnexpiredTS,
long now) throws IOException {
if (scan.isReversed()) {
if (scan.includeStopRow()) {
return new NormalUserScanQueryMatcher(scan, scanInfo, columns, hasNullColumn, deletes,
oldestUnexpiredTS, now) {
@Override
protected boolean moreRowsMayExistsAfter(int cmpToStopRow) {
return cmpToStopRow >= 0;
}
};
} else {
return new NormalUserScanQueryMatcher(scan, scanInfo, columns, hasNullColumn, deletes,
oldestUnexpiredTS, now) {
@Override
protected boolean moreRowsMayExistsAfter(int cmpToStopRow) {
return cmpToStopRow > 0;
}
};
}
} else {
if (scan.includeStopRow()) {
return new NormalUserScanQueryMatcher(scan, scanInfo, columns, hasNullColumn, deletes,
oldestUnexpiredTS, now) {
@Override
protected boolean moreRowsMayExistsAfter(int cmpToStopRow) {
return cmpToStopRow <= 0;
}
};
} else {
return new NormalUserScanQueryMatcher(scan, scanInfo, columns, hasNullColumn, deletes,
oldestUnexpiredTS, now) {
@Override
protected boolean moreRowsMayExistsAfter(int cmpToStopRow) {
return cmpToStopRow < 0;
}
};
}
}
}
}
