Examples of Scan

cellmate.accumulo.reader.scan.Scan
Returns the internal scan
com.denimgroup.threadfix.data.entities.Scan
net.sf.mzmine.data.Scan
This class represent one spectrum of a raw data file.
org.apache.drill.common.logical.data.Scan
org.apache.hadoop.hbase.client.Scan
Used to perform Scan operations.
All operations are identical to {@link Get} with the exception ofinstantiation. Rather than specifying a single row, an optional startRow and stopRow may be defined. If rows are not specified, the Scanner will iterate over all rows.
To scan everything for each row, instantiate a Scan object.
To modify scanner caching for just this scan, use {@link #setCaching(int) setCaching}. If caching is NOT set, we will use the caching value of the hosting {@link HTable}. See {@link HTable#setScannerCaching(int)}.
To further define the scope of what to get when scanning, perform additional methods as outlined below.
To get all columns from specific families, execute {@link #addFamily(byte[]) addFamily}for each family to retrieve.
To get specific columns, execute {@link #addColumn(byte[],byte[]) addColumn}for each column to retrieve.
To only retrieve columns within a specific range of version timestamps, execute {@link #setTimeRange(long,long) setTimeRange}.
To only retrieve columns with a specific timestamp, execute {@link #setTimeStamp(long) setTimestamp}.
To limit the number of versions of each column to be returned, execute {@link #setMaxVersions(int) setMaxVersions}.
To limit the maximum number of values returned for each call to next(), execute {@link #setBatch(int) setBatch}.
To add a filter, execute {@link #setFilter(org.apache.hadoop.hbase.filter.Filter) setFilter}.
Expert: To explicitly disable server-side block caching for this scan, execute {@link #setCacheBlocks(boolean)}.

Examples of org.apache.hadoop.hbase.client.Scan

    public int scannerOpenWithScan(ByteBuffer tableName, TScan tScan,
        Map<ByteBuffer, ByteBuffer> attributes)
        throws IOError {
      try {
        HTable table = getTable(tableName);
        Scan scan = new Scan();
        addAttributes(scan, attributes);
        if (tScan.isSetStartRow()) {
          scan.setStartRow(tScan.getStartRow());
        }
        if (tScan.isSetStopRow()) {
          scan.setStopRow(tScan.getStopRow());
        }
        if (tScan.isSetTimestamp()) {
          scan.setTimeRange(Long.MIN_VALUE, tScan.getTimestamp());
        }
        if (tScan.isSetCaching()) {
          scan.setCaching(tScan.getCaching());
        }
        if (tScan.isSetColumns() && tScan.getColumns().size() != 0) {
          for(ByteBuffer column : tScan.getColumns()) {
            byte [][] famQf = KeyValue.parseColumn(getBytes(column));
            if(famQf.length == 1) {
              scan.addFamily(famQf[0]);
            } else {
              scan.addColumn(famQf[0], famQf[1]);
            }
          }
        }
        if (tScan.isSetFilterString()) {
          ParseFilter parseFilter = new ParseFilter();
          scan.setFilter(
              parseFilter.parseFilterString(tScan.getFilterString()));
        }
        return addScanner(table.getScanner(scan));
      } catch (IOException e) {
        LOG.warn(e.getMessage(), e);

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Examples of org.apache.hadoop.hbase.client.Scan

    public int scannerOpen(ByteBuffer tableName, ByteBuffer startRow,
        List<ByteBuffer> columns,
        Map<ByteBuffer, ByteBuffer> attributes) throws IOError {
      try {
        HTable table = getTable(tableName);
        Scan scan = new Scan(getBytes(startRow));
        addAttributes(scan, attributes);
        if(columns != null && columns.size() != 0) {
          for(ByteBuffer column : columns) {
            byte [][] famQf = KeyValue.parseColumn(getBytes(column));
            if(famQf.length == 1) {
              scan.addFamily(famQf[0]);
            } else {
              scan.addColumn(famQf[0], famQf[1]);
            }
          }
        }
        return addScanner(table.getScanner(scan));
      } catch (IOException e) {

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Examples of org.apache.hadoop.hbase.client.Scan

        ByteBuffer stopRow, List<ByteBuffer> columns,
        Map<ByteBuffer, ByteBuffer> attributes)
        throws IOError, TException {
      try {
        HTable table = getTable(tableName);
        Scan scan = new Scan(getBytes(startRow), getBytes(stopRow));
        addAttributes(scan, attributes);
        if(columns != null && columns.size() != 0) {
          for(ByteBuffer column : columns) {
            byte [][] famQf = KeyValue.parseColumn(getBytes(column));
            if(famQf.length == 1) {
              scan.addFamily(famQf[0]);
            } else {
              scan.addColumn(famQf[0], famQf[1]);
            }
          }
        }
        return addScanner(table.getScanner(scan));
      } catch (IOException e) {

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Examples of org.apache.hadoop.hbase.client.Scan

                                     List<ByteBuffer> columns,
        Map<ByteBuffer, ByteBuffer> attributes)
        throws IOError, TException {
      try {
        HTable table = getTable(tableName);
        Scan scan = new Scan(getBytes(startAndPrefix));
        addAttributes(scan, attributes);
        Filter f = new WhileMatchFilter(
            new PrefixFilter(getBytes(startAndPrefix)));
        scan.setFilter(f);
        if (columns != null && columns.size() != 0) {
          for(ByteBuffer column : columns) {
            byte [][] famQf = KeyValue.parseColumn(getBytes(column));
            if(famQf.length == 1) {
              scan.addFamily(famQf[0]);
            } else {
              scan.addColumn(famQf[0], famQf[1]);
            }
          }
        }
        return addScanner(table.getScanner(scan));
      } catch (IOException e) {

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Examples of org.apache.hadoop.hbase.client.Scan

    public int scannerOpenTs(ByteBuffer tableName, ByteBuffer startRow,
        List<ByteBuffer> columns, long timestamp,
        Map<ByteBuffer, ByteBuffer> attributes) throws IOError, TException {
      try {
        HTable table = getTable(tableName);
        Scan scan = new Scan(getBytes(startRow));
        addAttributes(scan, attributes);
        scan.setTimeRange(Long.MIN_VALUE, timestamp);
        if (columns != null && columns.size() != 0) {
          for (ByteBuffer column : columns) {
            byte [][] famQf = KeyValue.parseColumn(getBytes(column));
            if(famQf.length == 1) {
              scan.addFamily(famQf[0]);
            } else {
              scan.addColumn(famQf[0], famQf[1]);
            }
          }
        }
        return addScanner(table.getScanner(scan));
      } catch (IOException e) {

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Examples of org.apache.hadoop.hbase.client.Scan

        ByteBuffer stopRow, List<ByteBuffer> columns, long timestamp,
        Map<ByteBuffer, ByteBuffer> attributes)
        throws IOError, TException {
      try {
        HTable table = getTable(tableName);
        Scan scan = new Scan(getBytes(startRow), getBytes(stopRow));
        addAttributes(scan, attributes);
        scan.setTimeRange(Long.MIN_VALUE, timestamp);
        if (columns != null && columns.size() != 0) {
          for (ByteBuffer column : columns) {
            byte [][] famQf = KeyValue.parseColumn(getBytes(column));
            if(famQf.length == 1) {
              scan.addFamily(famQf[0]);
            } else {
              scan.addColumn(famQf[0], famQf[1]);
            }
          }
        }
        scan.setTimeRange(Long.MIN_VALUE, timestamp);
        return addScanner(table.getScanner(scan));
      } catch (IOException e) {
        LOG.warn(e.getMessage(), e);
        throw new IOError(e.getMessage());
      }

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Examples of org.apache.hadoop.hbase.client.Scan

       if (coprocessorHost.preGet(get, results)) {
         return results;
       }
    }


    Scan scan = new Scan(get);


    RegionScanner scanner = null;
    try {
      scanner = getScanner(scan);
      scanner.next(results, SchemaMetrics.METRIC_GETSIZE);

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Examples of org.apache.hadoop.hbase.client.Scan

      region.initialize();
      if (majorCompact) {
        region.compactStores(true);
      } else {
        // Default behavior
        Scan scan = new Scan();
        // scan.addFamily(HConstants.CATALOG_FAMILY);
        RegionScanner scanner = region.getScanner(scan);
        try {
          List<KeyValue> kvs = new ArrayList<KeyValue>();
          boolean done = false;

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Examples of org.apache.hadoop.hbase.client.Scan

      region.put(p);


      Get get = new Get(row.getBytes());
      Filter filter = new ColumnCountGetFilter(100);
      get.setFilter(filter);
      Scan scan = new Scan(get);
      InternalScanner scanner = region.getScanner(scan);
      List<KeyValue> results = new ArrayList<KeyValue>();
      scanner.next(results);
      assertEquals(100, results.size());
    } finally {

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Examples of org.apache.hadoop.hbase.client.Scan


      Get get = new Get(row.getBytes());
      FilterList filterLst = new FilterList ();
      filterLst.addFilter( new ColumnCountGetFilter(100));
      get.setFilter(filterLst);
      Scan scan = new Scan(get);
      InternalScanner scanner = region.getScanner(scan);
      List<KeyValue> results = new ArrayList<KeyValue>();
      scanner.next(results);
      assertEquals(100, results.size());
    } finally {

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