Examples of org.iq80.leveldb.DBIterator.seek()

org.iq80.leveldb.DBIterator.seek()
Repositions the iterator so the key of the next BlockElement returned greater than or equal to the specified targetKey.

  @Override
  public List<Alert> getAlerts(String accountName) {
    List<Alert> alertList = new ArrayList<>();


    DBIterator iterator = db.iterator();
    iterator.seek(bytes(alertBucketKey + accountName));
    while (iterator.hasNext() && asString(iterator.peekNext().getKey()).startsWith(alertBucketKey + accountName)) {
      BasicAlert alert = gson.fromJson(asString(iterator.next().getValue()), BasicAlert.class);
      alertList.add(alert);
    }

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  @Override
  public List<TriggeredAlert> getTriggeredAlerts(String accountName, Long fromTimeperiod, Long toTimeperiod) {
    List<TriggeredAlert> triggeredAlertList = new ArrayList<>();
    
    DBIterator iterator = db.iterator();
    iterator.seek(bytes(triggeredAlertlertBucketKey + accountName));
    while (iterator.hasNext() && asString(iterator.peekNext().getKey()).startsWith(triggeredAlertlertBucketKey + accountName)) {
      BasicTriggeredAlert triggeredAlert = gson.fromJson(asString(iterator.next().getValue()), BasicTriggeredAlert.class);
      if (triggeredAlert.getTriggeredTimeperiod() >= fromTimeperiod && triggeredAlert.getTriggeredTimeperiod() <= toTimeperiod) {
        triggeredAlertList.add(triggeredAlert);
      }

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  @Override
  public List<TriggeredAlert> getTriggeredAlerts(String alertname, String accountName, Long fromTimeperiod, Long toTimeperiod) {
List<TriggeredAlert> triggeredAlertList = new ArrayList<>();
    
    DBIterator iterator = db.iterator();
    iterator.seek(bytes(triggeredAlertlertBucketKey + accountName + ";" + alertname));
    while (iterator.hasNext() && asString(iterator.peekNext().getKey()).startsWith(triggeredAlertlertBucketKey + accountName + ";" + alertname)) {
      BasicTriggeredAlert triggeredAlert = gson.fromJson(asString(iterator.next().getValue()), BasicTriggeredAlert.class);
      if (triggeredAlert.getTriggeredTimeperiod() >= fromTimeperiod && triggeredAlert.getTriggeredTimeperiod() <= toTimeperiod) {
        triggeredAlertList.add(triggeredAlert);
      }

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  @Override
  public List<TriggeredAlert> getRecentTriggeredAlerts(String accountName, int numAlerts) {
    List<TriggeredAlert> triggeredAlertList = new ArrayList<>();
    
    DBIterator iterator = db.iterator();
    iterator.seek(bytes(triggeredAlertlertBucketKey + accountName));
    int foundAlerts = 0;
    while (iterator.hasNext() && asString(iterator.peekNext().getKey()).startsWith(triggeredAlertlertBucketKey + accountName)) {
      BasicTriggeredAlert triggeredAlert = gson.fromJson(asString(iterator.next().getValue()), BasicTriggeredAlert.class);
      triggeredAlertList.add(triggeredAlert);
      foundAlerts++;

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        DBIterator it = levelDBFile.getDb().iterator();


        String keyBuffer = null;
        try {
            String prefix = repositoryName + '\0';
            for (it.seek(keyBuilder(repositoryName, "")); it.hasNext(); it.next()) {
                if (!isRunAllowed()) {
                    break;
                }
                keyBuffer = asString(it.peekNext().getKey());

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        String keyBuffer = null;
        try {
            String prefix = getRepositoryNameCompleted() + '\0';


            for (it.seek(keyBuilder(getRepositoryNameCompleted(), "")); it.hasNext(); it.next()) {
                keyBuffer = asString(it.peekNext().getKey());


                if (!keyBuffer.startsWith(prefix)) {
                    break;
                }

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        DBIterator it = levelDBFile.getDb().iterator();


        String prefix = repositoryName + '\0';
        int count = 0;
        try {
            for (it.seek(keyBuilder(repositoryName, "")); it.hasNext(); it.next()) {
                if (!asString(it.peekNext().getKey()).startsWith(prefix)) {
                    break;
                }
                count++;
            }

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    byte[] startKey = createStartKey(row, columns == null ? startCol : columns[0]);
    byte[] endKey = createEndKey(row, columns == null ? stopCol : upperBound(columns[columns.length - 1]));
    DBIterator iterator = getDB().iterator();
    try {
      iterator.seek(startKey);
      return getRow(iterator, endKey, tx, false, columns, limit).getSecond();
    } finally {
      iterator.close();
    }
  }

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    Preconditions.checkNotNull(prefix, "prefix must not be null");
    DB db = getDB();
    WriteBatch batch = db.createWriteBatch();
    DBIterator iterator = db.iterator();
    try {
      iterator.seek(createStartKey(prefix));
      while (iterator.hasNext()) {
        Map.Entry<byte[], byte[]> entry = iterator.next();
        if (!Bytes.startsWith(KeyValue.fromKey(entry.getKey()).getRow(), prefix)) {
          // iterator is past prefix
          break;

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    byte[] startKey = createStartKey(currentRow);
    DB db = getDB();
    DBIterator iterator = db.iterator();
    WriteBatch batch = db.createWriteBatch();
    try {
      iterator.seek(startKey);
      if (!iterator.hasNext()) {
        return; // nothing in the db to delete
      }
      Map.Entry<byte[], byte[]> entry = iterator.next();

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