c# ConcurrentDictionary和ConcurrentQueue怎么使用？

Question

上图是我的数据结构。我定义了一个线程安全的静态变量（作用：消息队列）用来存储消息，如下：

private static ConcurrentDictionary<string, ConcurrentQueue<SignalModel>> _dic = new ConcurrentDictionary<string, ConcurrentQueue<SignalModel>>();

既用到了ConcurrentDictionary又用到了ConcurrentQueue。用字典是因为要根据IP分组存储。

我就是不知道用了ConcurrentDictionary之后，字典的value是否还有必要使用ConcurrentQueue来定义。

是否应该将ConcurrentQueue改成List？

Answer 1

参考 Concurrent collections is it safe to modify from different threads：

ConcurrentQueue is only ensuring that calls to methods of that class are observed to be atomic; it is making no other guarantees surrounding thread safety.