Examples of org.apache.accumulo.core.client.Connector.createScanner()

Class org.apache.accumulo.core.client.Connector

Examples of org.apache.accumulo.core.client.Connector.createScanner()

org.apache.accumulo.core.client.Connector.createScanner()
Factory method to create a Scanner connected to Accumulo. @param tableName the name of the table to query data from @param authorizations A set of authorization labels that will be checked against the column visibility of each key in order to filter data. The authorizations passed in must be a subset of the accumulo user's set of authorizations. If the accumulo user has authorizations (A1, A2) and authorizations (A2, A3) are passed, then an exception will be thrown. @return Scanner object for configuring and querying data with @throws TableNotFoundException when the specified table doesn't exist

    
    bw.flush();
    
    int count = 10;
    
    Scanner scanner = c.createScanner("test", Constants.NO_AUTHS);
    for (Entry<Key,Value> entry : scanner) {
      Key key = entry.getKey();
      Mutation m = new Mutation(key.getRow());
      m.put(key.getColumnFamily().toString(), key.getColumnQualifier().toString(), key.getTimestamp() + 1, "v" + (count));
      count++;

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    b.flush();
    b = bw.getBatchWriter("b");
    b.addMutation(m1);
    b.flush();
    
    Scanner scanner = c.createScanner("a", Constants.NO_AUTHS);
    int count = 0;
    for (@SuppressWarnings("unused")
    Entry<Key,Value> entry : scanner) {
      count++;
    }

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    Entry<Key,Value> entry : scanner) {
      count++;
    }
    assertEquals(1, count);
    count = 0;
    scanner = c.createScanner("b", Constants.NO_AUTHS);
    for (@SuppressWarnings("unused")
    Entry<Key,Value> entry : scanner) {
      count++;
    }
    assertEquals(1, count);

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      bw.addMutation(m);
    }
    
    bw.close();
    
    Scanner scanner = c.createScanner("test", Constants.NO_AUTHS);
    
    Entry<Key,Value> entry = scanner.iterator().next();
    
    assertEquals("9", entry.getValue().toString());

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    bw.close();
    
    MRTester.main(new String[] {"root", "", TEST_TABLE_1, TEST_TABLE_2});
    assertNull(e1);
    
    Scanner scanner = c.createScanner(TEST_TABLE_2, new Authorizations());
    Iterator<Entry<Key,Value>> iter = scanner.iterator();
    assertTrue(iter.hasNext());
    Entry<Key,Value> entry = iter.next();
    assertEquals(Integer.parseInt(new String(entry.getValue().get())), 100);
    assertFalse(iter.hasNext());

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  }
  
  private static TreeSet<RowColumn> scanAll(ClientOpts opts, ScannerOpts scanOpts, Text t) throws Exception {
    TreeSet<RowColumn> result = new TreeSet<RowColumn>();
    Connector conn = opts.getConnector();
    Scanner scanner = conn.createScanner(t.toString(), auths);
    scanner.setBatchSize(scanOpts.scanBatchSize);
    for (Entry<Key,Value> entry : scanner) {
      Key key = entry.getKey();
      Column column = new Column(TextUtil.getBytes(key.getColumnFamily()), TextUtil.getBytes(key.getColumnQualifier()), TextUtil.getBytes(key
          .getColumnVisibility()));

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        if (opts.useGet) {
          Text rowKey = new Text("row_" + String.format("%010d", expectedRow + opts.startRow));
          Text colf = new Text(opts.columnFamily);
          Text colq = new Text("col_" + String.format("%07d", expectedCol));
          
          Scanner scanner = connector.createScanner("test_ingest", labelAuths);
          scanner.setBatchSize(1);
          Key startKey = new Key(rowKey, colf, colq);
          Range range = new Range(startKey, startKey.followingKey(PartialKey.ROW_COLFAM_COLQUAL));
          scanner.setRange(range);

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        } else {
          
          Key startKey = new Key(new Text("row_" + String.format("%010d", expectedRow)));
          
          Scanner scanner = connector.createScanner("test_ingest", labelAuths);
          scanner.setBatchSize(scanOpts.scanBatchSize);
          scanner.setRange(new Range(startKey, endKey));
          for (int j = 0; j < opts.cols; j++) {
            scanner.fetchColumn(new Text(opts.columnFamily), new Text("col_" + String.format("%07d", j)));
          }

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    ClientOpts opts = new ClientOpts();
    opts.parseArgs(LocalityCheck.class.getName(), args);
    
    FileSystem fs = FileSystem.get(CachedConfiguration.getInstance());
    Connector connector = opts.getConnector();
    Scanner scanner = connector.createScanner(Constants.METADATA_TABLE_NAME, Constants.NO_AUTHS);
    scanner.fetchColumnFamily(Constants.METADATA_CURRENT_LOCATION_COLUMN_FAMILY);
    scanner.fetchColumnFamily(Constants.METADATA_DATAFILE_COLUMN_FAMILY);
    scanner.setRange(Constants.METADATA_KEYSPACE);
    
    Map<String,Long> totalBlocks = new HashMap<String,Long>();

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    Random r = new Random();
    Authorizations auths = opts.randomAuths.getAuths(r);


    Connector conn = opts.getConnector();
    Scanner scanner = conn.createScanner(opts.getTableName(), auths);
    scanner.setBatchSize(scanOpts.scanBatchSize);
    
    BatchScanner bs = conn.createBatchScanner(opts.getTableName(), auths, bsOpts.scanThreads);
    bs.setTimeout(bsOpts.scanTimeout, TimeUnit.MILLISECONDS);

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