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Java Get.getMaxVersions方法代码示例

本文整理汇总了Java中org.apache.hadoop.hbase.client.Get.getMaxVersions方法的典型用法代码示例。如果您正苦于以下问题:Java Get.getMaxVersions方法的具体用法?Java Get.getMaxVersions怎么用?Java Get.getMaxVersions使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在org.apache.hadoop.hbase.client.Get的用法示例。


在下文中一共展示了Get.getMaxVersions方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Java代码示例。

示例1: get

import org.apache.hadoop.hbase.client.Get; //导入方法依赖的package包/类
@Override
public Result[] get(List<Get> gets) throws IOException {
  byte[][] rows = new byte[gets.size()][];
  int maxVersions = 1;
  int count = 0;

  for(Get g:gets) {

    if ( count == 0 ) {
      maxVersions = g.getMaxVersions();
    } else if (g.getMaxVersions() != maxVersions) {
      LOG.warn("MaxVersions on Gets do not match, using the first in the list ("+maxVersions+")");
    }

    if (g.getFilter() != null) {
      LOG.warn("filters not supported on gets");
    }

    rows[count] = g.getRow();
    count ++;
  }

  String spec = buildMultiRowSpec(rows, maxVersions);

  return getResults(spec);
}
 
开发者ID:fengchen8086,项目名称:ditb,代码行数:27,代码来源:RemoteHTable.java

示例2: prePrepareTimeStampForDeleteVersion

import org.apache.hadoop.hbase.client.Get; //导入方法依赖的package包/类
@Override
public void prePrepareTimeStampForDeleteVersion(
    ObserverContext<RegionCoprocessorEnvironment> ctx, Mutation delete, Cell cell,
    byte[] byteNow, Get get) throws IOException {
  // Nothing to do if we are not filtering by visibility
  if (!authorizationEnabled) {
    return;
  }

  CellVisibility cellVisibility = null;
  try {
    cellVisibility = delete.getCellVisibility();
  } catch (DeserializationException de) {
    throw new IOException("Invalid cell visibility specified " + delete, de);
  }
  // The check for checkForReservedVisibilityTagPresence happens in preBatchMutate happens.
  // It happens for every mutation and that would be enough.
  List<Tag> visibilityTags = new ArrayList<Tag>();
  if (cellVisibility != null) {
    String labelsExp = cellVisibility.getExpression();
    try {
      visibilityTags = this.visibilityLabelService.createVisibilityExpTags(labelsExp, false,
          false);
    } catch (InvalidLabelException e) {
      throw new IOException("Invalid cell visibility specified " + labelsExp, e);
    }
  }
  get.setFilter(new DeleteVersionVisibilityExpressionFilter(visibilityTags,
      VisibilityConstants.SORTED_ORDINAL_SERIALIZATION_FORMAT));
  List<Cell> result = ctx.getEnvironment().getRegion().get(get, false);

  if (result.size() < get.getMaxVersions()) {
    // Nothing to delete
    CellUtil.updateLatestStamp(cell, Long.MIN_VALUE);
    return;
  }
  if (result.size() > get.getMaxVersions()) {
    throw new RuntimeException("Unexpected size: " + result.size()
        + ". Results more than the max versions obtained.");
  }
  Cell getCell = result.get(get.getMaxVersions() - 1);
  CellUtil.setTimestamp(cell, getCell.getTimestamp());

  // We are bypassing here because in the HRegion.updateDeleteLatestVersionTimeStamp we would
  // update with the current timestamp after again doing a get. As the hook as already determined
  // the needed timestamp we need to bypass here.
  // TODO : See if HRegion.updateDeleteLatestVersionTimeStamp() could be
  // called only if the hook is not called.
  ctx.bypass();
}
 
开发者ID:fengchen8086,项目名称:ditb,代码行数:51,代码来源:VisibilityController.java


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