FifoBuffer - apache 通用集合 4 替换

Question

我想升级到 apache.commons.collections4，但是一些 类 作为 CircularFifoBuffer 和 UnboundedFifoBuffer 被删除了

import org.apache.commons.collections.buffer.CircularFifoBuffer;

这种 类 的正确替代品是什么？

找到几个suggestions:

hadJan Haderka

Or perhaps there's yet another option:

replace buffer with MinMaxPriorityQueue which on it's own is also not thread safe, but guava fortunately provides wrapper for thread safety in form of Queues.synchronizedQueue(Queue q) call. Since we use guava elsewhere already it should be ok to use the library instead of commons. Not sure about performance comparison of the two tho.

Cedric Reichenbach

it seems like Queues#synchronizedQueue is indeed the equivalent of BufferUtils#synchronizedBuffer, i.e. synchronizes every access to the contained queue/buffer. However, a more precise match in Guava for CircularFifoBuffer would probably be EvictingQueue, or, since the sync wrapper works for any Queue, even Java's own Apache's new CircularFifoQueue.

我没有在 mailing list or release notes

中找到答案

Answer 1

在任务 COLLECTIONS-432 中找到答案 将 Buffer 接口替换为 java.util.Queue

BoundedFifoBuffer is replaced with java.util.concurrent.ArrayBlockingQueue

CircularFifoBuffer is replaced with java.util.concurrent.ArrayBlockingQueue.

PredicatedBuffer transfered into PredivatedBuffer

PriorityBuffer is replaced with java.util.PriorityQueue

SynchronizedBuffer is replaced with java.util.concurrent.SynchronizedQueue

BlockingBuffer is replaced with java.util.concurrent.BlockingQueue (practical java.util.concurrent.ArrayBlockingQueue or java.util.concurrent.SynchronizedQueue)

BoundedBuffer is replaced with java.util.concurrent.ArrayBlockingQueue

TransformedBuffer transfered into TransformedQueue

UnboundedFifoBuffer is replaced with java.util.concurrent.ArrayBlockingQueue