org.apache.flink.contrib.streaming.state

类 RocksDBCachingPriorityQueueSet<E extends org.apache.flink.runtime.state.heap.HeapPriorityQueueElement>

java.lang.Object

org.apache.flink.contrib.streaming.state.RocksDBCachingPriorityQueueSet<E>

类型参数:

E - the type of the contained elements in the queue.

所有已实现的接口:

org.apache.flink.runtime.state.heap.HeapPriorityQueueElement, org.apache.flink.runtime.state.InternalPriorityQueue<E>

public class RocksDBCachingPriorityQueueSet<E extends org.apache.flink.runtime.state.heap.HeapPriorityQueueElement>
extends Object
implements org.apache.flink.runtime.state.InternalPriorityQueue<E>, org.apache.flink.runtime.state.heap.HeapPriorityQueueElement

A priority queue with set semantics, implemented on top of RocksDB. This uses a TreeSet to cache the bytes of up to the first n elements from RocksDB in memory to reduce interaction with RocksDB, in particular seek operations. Cache uses a simple write-through policy.

嵌套类概要

嵌套类

限定符和类型	类和说明
static interface	RocksDBCachingPriorityQueueSet.OrderedByteArraySetCache Cache that is organized as an ordered set for byte-arrays.

字段概要

从接口继承的字段 org.apache.flink.runtime.state.heap.HeapPriorityQueueElement

NOT_CONTAINED

方法概要

限定符和类型	方法和说明
boolean	add(E toAdd)
void	addAll(Collection<? extends E> toAdd)
int	getInternalIndex()
boolean	isEmpty()
org.apache.flink.util.CloseableIterator<E>	iterator()
E	peek()
E	poll()
boolean	remove(E toRemove)
void	setInternalIndex(int newIndex)
int	size() This implementation comes at a relatively high cost per invocation.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

peek

@Nullable
public E peek()

指定者:

peek 在接口中 org.apache.flink.runtime.state.InternalPriorityQueue<E extends org.apache.flink.runtime.state.heap.HeapPriorityQueueElement>

poll

@Nullable
public E poll()

指定者:

poll 在接口中 org.apache.flink.runtime.state.InternalPriorityQueue<E extends org.apache.flink.runtime.state.heap.HeapPriorityQueueElement>

add

public boolean add(@Nonnull
                   E toAdd)

指定者:

add 在接口中 org.apache.flink.runtime.state.InternalPriorityQueue<E extends org.apache.flink.runtime.state.heap.HeapPriorityQueueElement>

remove

public boolean remove(@Nonnull
                      E toRemove)

指定者:

remove 在接口中 org.apache.flink.runtime.state.InternalPriorityQueue<E extends org.apache.flink.runtime.state.heap.HeapPriorityQueueElement>

addAll

public void addAll(@Nullable
                   Collection<? extends E> toAdd)

指定者:

addAll 在接口中 org.apache.flink.runtime.state.InternalPriorityQueue<E extends org.apache.flink.runtime.state.heap.HeapPriorityQueueElement>

isEmpty

public boolean isEmpty()

指定者:

isEmpty 在接口中 org.apache.flink.runtime.state.InternalPriorityQueue<E extends org.apache.flink.runtime.state.heap.HeapPriorityQueueElement>

iterator

@Nonnull
public org.apache.flink.util.CloseableIterator<E> iterator()

指定者:

iterator 在接口中 org.apache.flink.runtime.state.InternalPriorityQueue<E extends org.apache.flink.runtime.state.heap.HeapPriorityQueueElement>

size

public int size()

This implementation comes at a relatively high cost per invocation. It should not be called repeatedly when it is clear that the value did not change. Currently this is only truly used to realize certain higher-level tests.

指定者:

size 在接口中 org.apache.flink.runtime.state.InternalPriorityQueue<E extends org.apache.flink.runtime.state.heap.HeapPriorityQueueElement>

getInternalIndex

public int getInternalIndex()

指定者:

getInternalIndex 在接口中 org.apache.flink.runtime.state.heap.HeapPriorityQueueElement

setInternalIndex

public void setInternalIndex(int newIndex)

指定者:

setInternalIndex 在接口中 org.apache.flink.runtime.state.heap.HeapPriorityQueueElement