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Java Scan.getRowOffsetPerColumnFamily方法代码示例

本文整理汇总了Java中org.apache.hadoop.hbase.client.Scan.getRowOffsetPerColumnFamily方法的典型用法代码示例。如果您正苦于以下问题:Java Scan.getRowOffsetPerColumnFamily方法的具体用法?Java Scan.getRowOffsetPerColumnFamily怎么用?Java Scan.getRowOffsetPerColumnFamily使用的例子?那么恭喜您, 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.Scan的用法示例。


在下文中一共展示了Scan.getRowOffsetPerColumnFamily方法的1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: StoreScanner

import org.apache.hadoop.hbase.client.Scan; //导入方法依赖的package包/类
/**
 * Opens a scanner across memstore, snapshot, and all StoreFiles. Assumes we
 * are not in a compaction.
 *
 * @param store   who we scan
 * @param scan    the spec
 * @param columns which columns we are scanning
 * @throws IOException
 */
public StoreScanner(Store store, ScanInfo scanInfo, Scan scan, final NavigableSet<byte[]> columns,
    long readPt) throws IOException {
  this(store, scan, scanInfo, columns, readPt, scan.getCacheBlocks());
  if (columns != null && scan.isRaw()) {
    throw new DoNotRetryIOException("Cannot specify any column for a raw scan");
  }
  matcher = new ScanQueryMatcher(scan, scanInfo, columns, ScanType.USER_SCAN, Long.MAX_VALUE,
      HConstants.LATEST_TIMESTAMP, oldestUnexpiredTS, now, store.getCoprocessorHost());
  this.store.addChangedReaderObserver(this);
  // Pass columns to try to filter out unnecessary StoreFiles.
  List<KeyValueScanner> scanners = getScannersNoCompaction();
  // Seek all scanners to the start of the Row (or if the exact matching row
  // key does not exist, then to the start of the next matching Row).
  // Always check bloom filter to optimize the top row seek for delete
  // family marker.
  seekScanners(scanners, matcher.getStartKey(), explicitColumnQuery && lazySeekEnabledGlobally,
      parallelSeekEnabled);
  // set storeLimit
  this.storeLimit = scan.getMaxResultsPerColumnFamily();
  // set rowOffset
  this.storeOffset = scan.getRowOffsetPerColumnFamily();
  // Combine all seeked scanners with a heap
  resetKVHeap(scanners, store.getComparator());
}
 
开发者ID:fengchen8086,项目名称:ditb,代码行数:34,代码来源:StoreScanner.java


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