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

    accumulo = new MiniAccumuloCluster(config);
    accumulo.start();
    // wait for accumulo to be up and functional
    ZooKeeperInstance zoo = new ZooKeeperInstance(accumulo.getInstanceName(), accumulo.getZooKeepers());
    Connector c = zoo.getConnector("root", new PasswordToken(secret.getBytes()));
    for (@SuppressWarnings("unused") Entry<org.apache.accumulo.core.data.Key,Value> entry : c.createScanner(Constants.METADATA_TABLE_NAME, Constants.NO_AUTHS))
        ;
    
    Properties props = new Properties();
    props.put("instance", accumulo.getInstanceName());
    props.put("zookeepers", accumulo.getZooKeepers());

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          String tokenClass = token.getClass().getCanonicalName();
          ByteBuffer tokenBuffer = ByteBuffer.wrap(CredentialHelper.toBytes(token));
          scanner = new OfflineScanner(instance, new TCredentials(principal, tokenClass, tokenBuffer, instance.getInstanceID()), Tables.getTableId(instance,
              table), authorizations);
        } else {
          scanner = conn.createScanner(table, authorizations);
        }
        if (isIsolated) {
          log.info("Creating isolated scanner");
          scanner = new IsolatedScanner(scanner);
        }

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  public static void main(String[] args) throws Exception {
    ScanOpts opts = new ScanOpts();
    opts.parseArgs(Scan.class.getName(), args);
    
    Connector connector = opts.getConnector();
    Scanner scanner = connector.createScanner(opts.getTableName(), new Authorizations());
    
    if (opts.isolate) {
      scanner.enableIsolation();
    }

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    indexTableName = state.getString("indexTableName");
    imageTableName = state.getString("imageTableName");
    
    Connector conn = state.getConnector();
    
    Scanner indexScanner = conn.createScanner(indexTableName, new Authorizations());
    Scanner imageScanner = conn.createScanner(imageTableName, new Authorizations());
    
    String uuid = UUID.randomUUID().toString();
    
    MessageDigest alg = MessageDigest.getInstance("SHA-1");

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    imageTableName = state.getString("imageTableName");
    
    Connector conn = state.getConnector();
    
    Scanner indexScanner = conn.createScanner(indexTableName, new Authorizations());
    Scanner imageScanner = conn.createScanner(imageTableName, new Authorizations());
    
    String uuid = UUID.randomUUID().toString();
    
    MessageDigest alg = MessageDigest.getInstance("SHA-1");
    alg.update(uuid.getBytes(Constants.UTF8));

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    Connector conn = master.getConnector();
    
    checkOffline(conn);
    
    Scanner metaScanner = conn.createScanner(Constants.METADATA_TABLE_NAME, Constants.NO_AUTHS);
    metaScanner.setRange(new KeyExtent(new Text(tableInfo.tableID), null, null).toMetadataRange());
    
    // scan for locations
    metaScanner.fetchColumnFamily(Constants.METADATA_CURRENT_LOCATION_COLUMN_FAMILY);
    metaScanner.fetchColumnFamily(Constants.METADATA_FUTURE_LOCATION_COLUMN_FAMILY);

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      exec("insert " + i + " cf cq value", true);
    }


    ZooKeeperInstance instance = new ZooKeeperInstance(cluster.getInstanceName(), cluster.getZooKeepers());
    Connector connector = instance.getConnector("root", new PasswordToken(secret));
    final Scanner s = connector.createScanner(table, Constants.NO_AUTHS);
    IteratorSetting cfg = new IteratorSetting(30, SlowIterator.class);
    cfg.addOption("sleepTime", "500");
    s.addScanIterator(cfg);


    Thread thread = new Thread() {

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      Map<Entry<String,String>,String> table2Expectations = new HashMap<Entry<String,String>,String>();
      table2Expectations.put(Maps.immutableEntry("foo", "col1"), "val1");
      table2Expectations.put(Maps.immutableEntry("bar", "col1"), "val1");


      Scanner s = connector.createScanner(table1, new Authorizations());
      s.setRange(new Range());
      Map<Entry<String,String>,String> actual = new HashMap<Entry<String,String>,String>();
      for (Entry<Key,Value> entry : s) {
        actual.put(Maps.immutableEntry(entry.getKey().getRow().toString(), entry.getKey().getColumnFamily().toString()), entry.getValue().toString());
      }

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        actual.put(Maps.immutableEntry(entry.getKey().getRow().toString(), entry.getKey().getColumnFamily().toString()), entry.getValue().toString());
      }


      Assert.assertEquals("Differing results for " + table1, table1Expectations, actual);


      s = connector.createScanner(table2, new Authorizations());
      s.setRange(new Range());
      actual = new HashMap<Entry<String,String>,String>();
      for (Entry<Key,Value> entry : s) {
        actual.put(Maps.immutableEntry(entry.getKey().getRow().toString(), entry.getKey().getColumnFamily().toString()), entry.getValue().toString());
      }

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      expectations.put(Maps.immutableEntry("foo", "col2"), "val2");
      expectations.put(Maps.immutableEntry("bar", "col1"), "val1");
      expectations.put(Maps.immutableEntry("bar", "col2"), "val2");


      for (String table : Arrays.asList(newTable1, newTable2)) {
        Scanner s = connector.createScanner(table, new Authorizations());
        s.setRange(new Range());
        Map<Entry<String,String>,String> actual = new HashMap<Entry<String,String>,String>();
        for (Entry<Key,Value> entry : s) {
          actual.put(Maps.immutableEntry(entry.getKey().getRow().toString(), entry.getKey().getColumnFamily().toString()), entry.getValue().toString());
        }

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