KeyValueTableIterator (Pravega API)

```
@Beta
public interface KeyValueTableIterator
```
Defines a preconfigured Iterator for a KeyValueTable, which can be used to iterate over TableKey or TableEntry instances. See KeyValueTableIterator.Builder for configuring, and keys() and entries() for running.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static interface KeyValueTableIterator.Builder
Defines a Builder for a KeyValueTableIterator.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`io.pravega.common.util.AsyncIterator<IteratorItem<TableEntry>>`	`entries()`	Creates a new Iterator over `TableEntry` instances in the associated `KeyValueTable`.
`io.pravega.common.util.AsyncIterator<IteratorItem<TableKey>>`	`keys()`	Creates a new Iterator for `TableKey`s in the associated `KeyValueTable`.

- Method Detail
  - keys
```
io.pravega.common.util.AsyncIterator<IteratorItem<TableKey>> keys()
```
    Creates a new Iterator for TableKeys in the associated KeyValueTable. This is preferred to entries() if all that is needed is the TableKeys as less I/O is involved both server-side and between the server and client.
    
    Returns:
    
    An AsyncIterator that can be used to iterate over Keys in this KeyValueTable. The returned AsyncIterator guarantees the serialization of invocations to AsyncIterator.getNext(). See AsyncIterator.asSequential(java.util.concurrent.Executor).
  - entries
```
io.pravega.common.util.AsyncIterator<IteratorItem<TableEntry>> entries()
```
    Creates a new Iterator over TableEntry instances in the associated KeyValueTable. This should be used if both the Keys and their associated Values are needed and is preferred to using keys() to get the Keys and then issuing KeyValueTable.get(io.pravega.client.tables.TableKey)/KeyValueTable.getAll(java.lang.Iterable<io.pravega.client.tables.TableKey>) to retrieve the Values.
    
    Returns:
    
    An AsyncIterator that can be used to iterate over Entries in this KeyValueTable. The returned AsyncIterator guarantees the serialization of invocations to AsyncIterator.getNext(). See AsyncIterator.asSequential(java.util.concurrent.Executor).