RocksDBCachingPriorityQueueSet.OrderedByteArraySetCache (flink-statebackend-rocksdb 1.8.2 API)

所有已知实现类:

TreeOrderedSetCache

封闭类:

RocksDBCachingPriorityQueueSet<E extends org.apache.flink.runtime.state.heap.HeapPriorityQueueElement>
```
public static interface RocksDBCachingPriorityQueueSet.OrderedByteArraySetCache
```
Cache that is organized as an ordered set for byte-arrays. The byte-arrays are sorted in lexicographic order of their content. Caches typically have a bounded size.

字段概要

字段
限定符和类型字段和说明

static Comparator<byte[]> LEXICOGRAPHIC_BYTE_COMPARATOR
Comparator for byte arrays.

字段
限定符和类型	字段和说明
`static Comparator<byte[]>`	`LEXICOGRAPHIC_BYTE_COMPARATOR` Comparator for byte arrays.

方法概要

所有方法实例方法抽象方法
限定符和类型	方法和说明
`boolean`	`add(byte[] toAdd)` Adds the given element, if it was not already contained.
`void`	`bulkLoadFromOrderedIterator(Iterator<byte[]> orderedIterator)` Clears the cache and adds up to `maxSize()` elements from the iterator to the cache.
`boolean`	`isEmpty()` Returns `size() == 0`.
`boolean`	`isFull()` Returns `size() == maxSize()`.
`int`	`maxSize()` Returns the maximum number of elements that can be stored in the cache.
`byte[]`	`peekFirst()` Returns the first element or `null` if empty.
`byte[]`	`peekLast()` Returns the last element or `null` if empty.
`byte[]`	`pollFirst()` Returns and removes the first element or returns `null` if empty.
`byte[]`	`pollLast()` Returns and removes the last element or returns `null` if empty.
`boolean`	`remove(byte[] toRemove)` Removes the given element, if it is contained.
`int`	`size()` Returns the number of contained elements.

- 字段详细资料
  - LEXICOGRAPHIC_BYTE_COMPARATOR
```
static final Comparator<byte[]> LEXICOGRAPHIC_BYTE_COMPARATOR
```
    Comparator for byte arrays.
- 方法详细资料
  - size
```
int size()
```
    Returns the number of contained elements.
  - maxSize
```
int maxSize()
```
    Returns the maximum number of elements that can be stored in the cache.
  - isEmpty
```
boolean isEmpty()
```
    Returns size() == 0.
  - isFull
```
boolean isFull()
```
    Returns size() == maxSize().
  - add
```
boolean add(@Nonnull
            byte[] toAdd)
```
    Adds the given element, if it was not already contained. Returns true iff the cache was modified.
  - remove
```
boolean remove(@Nonnull
               byte[] toRemove)
```
    Removes the given element, if it is contained. Returns true iff the cache was modified.
  - peekFirst
```
@Nullable
byte[] peekFirst()
```
    Returns the first element or null if empty.
  - peekLast
```
@Nullable
byte[] peekLast()
```
    Returns the last element or null if empty.
  - pollFirst
```
@Nullable
byte[] pollFirst()
```
    Returns and removes the first element or returns null if empty.
  - pollLast
```
@Nullable
byte[] pollLast()
```
    Returns and removes the last element or returns null if empty.
  - bulkLoadFromOrderedIterator
```
void bulkLoadFromOrderedIterator(@Nonnull
                                 Iterator<byte[]> orderedIterator)
```
    Clears the cache and adds up to maxSize() elements from the iterator to the cache. Iterator must be ordered in the same order as this cache.
    
    参数:
    
    orderedIterator - iterator with elements in-order.

接口 RocksDBCachingPriorityQueueSet.OrderedByteArraySetCache

字段概要

方法概要

字段详细资料

LEXICOGRAPHIC_BYTE_COMPARATOR

方法详细资料

size

maxSize

isEmpty

isFull

add

remove

peekFirst

peekLast

pollFirst

pollLast

bulkLoadFromOrderedIterator