How to use

org.apache.flink.contrib.streaming.state.RocksIteratorWrapper

constructor

static RocksIteratorWrapper getRocksIterator(
  RocksDB db,
  ColumnFamilyHandle columnFamilyHandle) {
  return new RocksIteratorWrapper(db.newIterator(columnFamilyHandle));
}

public static RocksIteratorWrapper getRocksIterator(RocksDB db) {
  return new RocksIteratorWrapper(db.newIterator());
}

@Nonnull
private RocksBytesIterator orderedBytesIterator() {
  flushWriteBatch();
  return new RocksBytesIterator(
    new RocksIteratorWrapper(
      db.newIterator(columnFamilyHandle)));
}

@SuppressWarnings("unchecked")
private static RocksIteratorWrapper getRocksIterator(
  RocksDB db,
  ColumnFamilyHandle columnFamilyHandle,
  StateSnapshotTransformer<byte[]> stateSnapshotTransformer,
  ReadOptions readOptions) {
  RocksIterator rocksIterator = db.newIterator(columnFamilyHandle, readOptions);
  return stateSnapshotTransformer == null ?
    new RocksIteratorWrapper(rocksIterator) :
    new RocksTransformingIteratorWrapper(rocksIterator, stateSnapshotTransformer);
}

public static RocksIteratorWrapper getRocksIterator(
  RocksDB db,
  ColumnFamilyHandle columnFamilyHandle) {
  return new RocksIteratorWrapper(db.newIterator(columnFamilyHandle));
}

public static RocksIteratorWrapper getRocksIterator(
  RocksDB db,
  ColumnFamilyHandle columnFamilyHandle) {
  return new RocksIteratorWrapper(db.newIterator(columnFamilyHandle));
}

public static RocksIteratorWrapper getRocksIterator(RocksDB db) {
  return new RocksIteratorWrapper(db.newIterator());
}

public static RocksIteratorWrapper getRocksIterator(RocksDB db) {
  return new RocksIteratorWrapper(db.newIterator());
}

@Nonnull
private RocksBytesIterator orderedBytesIterator() {
  flushWriteBatch();
  return new RocksBytesIterator(
    new RocksIteratorWrapper(
      db.newIterator(columnFamilyHandle)));
}

@Nonnull
private RocksBytesIterator orderedBytesIterator() {
  flushWriteBatch();
  return new RocksBytesIterator(
    new RocksIteratorWrapper(
      db.newIterator(columnFamilyHandle)));
}

private void createColumnIterators(FilterFunction<String> stateFilter,
    List<StateMetaInfoSnapshot> stateMetaInfoSnapshots)
    throws Exception {
  Map<String, RocksIteratorWrapper> iterators = new HashMap<>();
  for (int i = 0; i < stateMetaInfoSnapshots.size(); i++) {
    String name = stateMetaInfoSnapshots.get(i).getName();
    if (stateFilter.filter(name)) {
      RocksIteratorWrapper iterator = new RocksIteratorWrapper(
          this.db.newIterator(stateColumnFamilyHandles.get(i + 1)));
      iterators.put(name, iterator);
      iterator.seekToFirst();
    }
  }
  iteratorQueue = new LinkedList<>(iterators.entrySet());
  updateCurrentIterator();
}

  @SuppressWarnings("unchecked")
  private static RocksIteratorWrapper getRocksIterator(
    RocksDB db,
    ColumnFamilyHandle columnFamilyHandle,
    RegisteredStateMetaInfoBase metaInfo,
    ReadOptions readOptions) {
    StateSnapshotTransformer<byte[]> stateSnapshotTransformer = null;
    if (metaInfo instanceof RegisteredKeyValueStateBackendMetaInfo) {
      stateSnapshotTransformer = (StateSnapshotTransformer<byte[]>)
        ((RegisteredKeyValueStateBackendMetaInfo<?, ?>) metaInfo).getSnapshotTransformer();
    }
    RocksIterator rocksIterator = db.newIterator(columnFamilyHandle, readOptions);
    return stateSnapshotTransformer == null ?
      new RocksIteratorWrapper(rocksIterator) :
      new RocksTransformingIteratorWrapper(rocksIterator, stateSnapshotTransformer);
  }
}

  @SuppressWarnings("unchecked")
  private static RocksIteratorWrapper getRocksIterator(
    RocksDB db,
    ColumnFamilyHandle columnFamilyHandle,
    RegisteredStateMetaInfoBase metaInfo,
    ReadOptions readOptions) {
    StateSnapshotTransformer<byte[]> stateSnapshotTransformer = null;
    if (metaInfo instanceof RegisteredKeyValueStateBackendMetaInfo) {
      stateSnapshotTransformer = (StateSnapshotTransformer<byte[]>)
        ((RegisteredKeyValueStateBackendMetaInfo<?, ?>) metaInfo).getSnapshotTransformer();
    }
    RocksIterator rocksIterator = db.newIterator(columnFamilyHandle, readOptions);
    return stateSnapshotTransformer == null ?
      new RocksIteratorWrapper(rocksIterator) :
      new RocksTransformingIteratorWrapper(rocksIterator, stateSnapshotTransformer);
  }
}