Java Code Examples for org.apache.hadoop.hbase.client.Scan#getMaxVersions()

The following examples show how to use org.apache.hadoop.hbase.client.Scan#getMaxVersions() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: UserScanQueryMatcher.java From hbase with Apache License 2.0

6 votes

protected UserScanQueryMatcher(Scan scan, ScanInfo scanInfo, ColumnTracker columns,
    boolean hasNullColumn, long oldestUnexpiredTS, long now) {
  super(createStartKey(scan, scanInfo), scanInfo, columns, oldestUnexpiredTS, now);
  this.hasNullColumn = hasNullColumn;
  this.filter = scan.getFilter();
  if (this.filter != null) {
    this.versionsAfterFilter =
        scan.isRaw() ? scan.getMaxVersions() : Math.min(scan.getMaxVersions(),
          scanInfo.getMaxVersions());
  } else {
    this.versionsAfterFilter = 0;
  }
  this.stopRow = scan.getStopRow();
  TimeRange timeRange = scan.getColumnFamilyTimeRange().get(scanInfo.getFamily());
  if (timeRange == null) {
    this.tr = scan.getTimeRange();
  } else {
    this.tr = timeRange;
  }
}

Example 2

Source File: MergingServerOp.java From geowave with Apache License 2.0

5 votes

@Override
public void preScannerOpen(final Scan scan) {
  final int maxVersions = scan.getMaxVersions();
  if ((maxVersions > 0) && (maxVersions < Integer.MAX_VALUE)) {
    scan.setAttribute(OLD_MAX_VERSIONS_KEY, ByteBuffer.allocate(4).putInt(maxVersions).array());
  }
  scan.setMaxVersions();
}

Example 3

Source File: ScanQueryMatcher.java From hbase with Apache License 2.0

4 votes

protected static Pair<DeleteTracker, ColumnTracker> getTrackers(RegionCoprocessorHost host,
    NavigableSet<byte[]> columns, ScanInfo scanInfo, long oldestUnexpiredTS, Scan userScan)
    throws IOException {
  int resultMaxVersion = scanInfo.getMaxVersions();
  int maxVersionToCheck = resultMaxVersion;
  if (userScan != null) {
    if (userScan.isRaw()) {
      resultMaxVersion = userScan.getMaxVersions();
      maxVersionToCheck = userScan.hasFilter() ? Integer.MAX_VALUE : resultMaxVersion;
    } else {
      resultMaxVersion = Math.min(userScan.getMaxVersions(), scanInfo.getMaxVersions());
      maxVersionToCheck = userScan.hasFilter() ? scanInfo.getMaxVersions() : resultMaxVersion;
    }
  }

  DeleteTracker deleteTracker;
  if (scanInfo.isNewVersionBehavior() && (userScan == null || !userScan.isRaw())) {
    deleteTracker = new NewVersionBehaviorTracker(columns, scanInfo.getComparator(),
        scanInfo.getMinVersions(), scanInfo.getMaxVersions(), resultMaxVersion,
        oldestUnexpiredTS);
  } else {
    deleteTracker = new ScanDeleteTracker(scanInfo.getComparator());
  }
  if (host != null) {
    deleteTracker = host.postInstantiateDeleteTracker(deleteTracker);
    if (deleteTracker instanceof VisibilityScanDeleteTracker && scanInfo.isNewVersionBehavior()) {
      deleteTracker = new VisibilityNewVersionBehaivorTracker(columns, scanInfo.getComparator(),
          scanInfo.getMinVersions(), scanInfo.getMaxVersions(), resultMaxVersion,
          oldestUnexpiredTS);
    }
  }

  ColumnTracker columnTracker;

  if (deleteTracker instanceof NewVersionBehaviorTracker) {
    columnTracker = (NewVersionBehaviorTracker) deleteTracker;
  } else if (columns == null || columns.size() == 0) {
    columnTracker = new ScanWildcardColumnTracker(scanInfo.getMinVersions(), maxVersionToCheck,
        oldestUnexpiredTS, scanInfo.getComparator());
  } else {
    columnTracker = new ExplicitColumnTracker(columns, scanInfo.getMinVersions(),
      maxVersionToCheck, oldestUnexpiredTS);
  }
  return new Pair<>(deleteTracker, columnTracker);
}

Example 4

Source File: ScannerModel.java From hbase with Apache License 2.0

4 votes

/**
 * @param scan the scan specification
 * @throws Exception
 */
public static ScannerModel fromScan(Scan scan) throws Exception {
  ScannerModel model = new ScannerModel();
  model.setStartRow(scan.getStartRow());
  model.setEndRow(scan.getStopRow());
  Map<byte [], NavigableSet<byte []>> families = scan.getFamilyMap();
  if (families != null) {
    for (Map.Entry<byte [], NavigableSet<byte []>> entry : families.entrySet()) {
      if (entry.getValue() != null) {
        for (byte[] qualifier: entry.getValue()) {
          model.addColumn(Bytes.add(entry.getKey(), COLUMN_DIVIDER, qualifier));
        }
      } else {
        model.addColumn(entry.getKey());
      }
    }
  }
  model.setStartTime(scan.getTimeRange().getMin());
  model.setEndTime(scan.getTimeRange().getMax());
  int caching = scan.getCaching();
  if (caching > 0) {
    model.setCaching(caching);
  }
  int batch = scan.getBatch();
  if (batch > 0) {
    model.setBatch(batch);
  }
  int maxVersions = scan.getMaxVersions();
  if (maxVersions > 0) {
    model.setMaxVersions(maxVersions);
  }
  if (scan.getLimit() > 0) {
    model.setLimit(scan.getLimit());
  }
  Filter filter = scan.getFilter();
  if (filter != null) {
    model.setFilter(stringifyFilter(filter));
  }
  // Add the visbility labels if found in the attributes
  Authorizations authorizations = scan.getAuthorizations();
  if (authorizations != null) {
    List<String> labels = authorizations.getLabels();
    for (String label : labels) {
      model.addLabel(label);
    }
  }
  return model;
}