Package org.apache.accumulo.core.client

Examples of org.apache.accumulo.core.client.Scanner.addScanIterator()

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    // initialize a scanner to ensure the new setting does not conflict with existing settings
    final String user = shellState.getConnector().whoami();
    final Authorizations auths = shellState.getConnector().securityOperations().getUserAuthorizations(user);
    final Scanner scanner = shellState.getConnector().createScanner(tableName, auths);
    for (IteratorSetting s : tableScanIterators) {
      scanner.addScanIterator(s);
    }
    scanner.addScanIterator(setting);
   
    // if no exception has been thrown, it's safe to add it to the list
    tableScanIterators.add(setting);
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    final Authorizations auths = shellState.getConnector().securityOperations().getUserAuthorizations(user);
    final Scanner scanner = shellState.getConnector().createScanner(tableName, auths);
    for (IteratorSetting s : tableScanIterators) {
      scanner.addScanIterator(s);
    }
    scanner.addScanIterator(setting);
   
    // if no exception has been thrown, it's safe to add it to the list
    tableScanIterators.add(setting);
    Shell.log.debug("Scan iterators :" + shellState.scanIteratorOptions.get(tableName));
  }
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      System.out.println("executing middle wildcard search for " + regexString + " from entries ending with " + lastPart);
      scanner.setRange(Range.prefix(getReverseIndex(lastPart)));
    }
    IteratorSetting regex = new IteratorSetting(50, "regex", RegExFilter.class);
    RegExFilter.setRegexs(regex, null, null, regexString, null, false);
    scanner.addScanIterator(regex);
    return scanner;
  }
 
  public static class Opts extends ClientOnRequiredTable {
    @Parameter(names="--path", description="the directory to list")
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      if (opts != null) {
        if (opts.iterators != null) {
          for (org.apache.accumulo.proxy.thrift.IteratorSetting iter : opts.iterators) {
            IteratorSetting is = new IteratorSetting(iter.getPriority(), iter.getName(), iter.getIteratorClass(), iter.getProperties());
            scanner.addScanIterator(is);
          }
        }
        org.apache.accumulo.proxy.thrift.Range prange = opts.range;
        if (prange != null) {
          Range range = new Range(Util.fromThrift(prange.getStart()), prange.startInclusive, Util.fromThrift(prange.getStop()), prange.stopInclusive);
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      return;
    }
   
    Connector connector = HdfsZooInstance.getInstance().getConnector(SecurityConstants.getSystemPrincipal(), SecurityConstants.getSystemToken());
    Scanner scanner = connector.createScanner(Constants.METADATA_TABLE_NAME, Constants.NO_AUTHS);
    scanner.addScanIterator(new IteratorSetting(1, "keys-only", SortedKeyIterator.class));
   
    if (table == null) {
      scanner.setRange(new Range(new Text("~err_"), false, new Text("~err`"), false));
    } else {
      scanner.setRange(new Range(new Text("~err_" + table)));
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      Connector conn = opts.getConnector();
      Scanner scanner = conn.createScanner(Constants.METADATA_TABLE_NAME, opts.auths);
      scanner.setBatchSize(scanBatchSize);
      scanner.fetchColumnFamily(Constants.METADATA_DATAFILE_COLUMN_FAMILY);
      scanner.addScanIterator(new IteratorSetting(1000, "cfc", ColumnFamilyCounter.class.getName()));
      scanner.setRange(new KeyExtent(new Text(tableId), null, null).toMetadataRange());
     
      Stat s = new Stat();
     
      int count = 0;
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    // Attempt a scan with an invalid iterator to force a log message in the monitor.
    try {
      Connector c = getConnector();
      Scanner s = c.createScanner("accumulo.root", new Authorizations());
      IteratorSetting cfg = new IteratorSetting(100, "incorrect", "java.lang.String");
      s.addScanIterator(cfg);
      s.iterator().next();
    } catch (Exception e) {
      // expected, the iterator was bad
    }
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    }
    Connector connector = getConnector();
    final Scanner s = connector.createScanner(table, Authorizations.EMPTY);
    IteratorSetting cfg = new IteratorSetting(30, SlowIterator.class);
    SlowIterator.setSleepTime(cfg, 500);
    s.addScanIterator(cfg);

    Thread thread = new Thread() {
      @Override
      public void run() {
        try {
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    conn.tableOperations().create(tableName);
    // make the world's slowest scanner
    final Scanner scanner = conn.createScanner(tableName, Authorizations.EMPTY);
    final IteratorSetting cfg = new IteratorSetting(100, SlowIterator.class);
    SlowIterator.setSeekSleepTime(cfg, 99999*1000);
    scanner.addScanIterator(cfg);
    // create a thread to interrupt the slow scan
    final Thread scanThread = Thread.currentThread();
    Thread thread = new Thread() {
      @Override
      public void run() {
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    IteratorSetting iterConfig3 = new IteratorSetting(5, VersioningIterator.class);
    VersioningIterator.setMaxVersions(iterConfig3, 1);

    Scanner scanner = conn.createScanner(tableName, new Authorizations());
    scanner.addScanIterator(iterConfig);
    scanner.setRange(new Range("ACCUMULO-1000"));
    scanner.fetchColumn(new Text("count"), new Text("comments"));

    Assert.assertEquals("3", scanner.iterator().next().getValue().toString());
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