您好,登錄后才能下訂單哦!
這期內容當中小編將會給大家帶來有關Java中怎么使用ArrayBlockingQueue解析阻塞隊列,文章內容豐富且以專業的角度為大家分析和敘述,閱讀完這篇文章希望大家可以有所收獲。
阻塞隊列是java開發時常用的一個數據結構。首先看一下阻塞隊列的作用是什么。阻塞隊列的作用,從源碼中類的注釋中來了解,是最清晰準確的。
ArrayBlockingQueue是一個用數組實現的有界阻塞隊列。提供FIFO的功能。隊列頭上的元素是在隊列中呆了最長時間的元素,隊列尾上的元素是在隊列中呆了時間最短的元素。新元素會插入在隊列尾部,從隊列獲取元素時會從隊列頭上獲取。
這是一個傳統的有界隊列,在這個有界隊列里,一個固定大小的數組用來保存生產者產生的元素和消費者獲取的元素。一旦創建,大小不可改變。往已滿的隊列中嘗試添加元素,會阻塞操作。從空的隊列中獲取元素,也會阻塞操作。
這個類為等待中的生產著和消費者線程排序提供可選的公平策略。默認情況下,順序是沒有保證的。但是,一個用fairness=true創建的隊列可以保證FIFO特性。公平性通常會降低吞吐量,但是可以減少易變性并避免饑餓。
/** * A bounded {@linkplain BlockingQueue blocking queue} backed by an * array. This queue orders elements FIFO (first-in-first-out). The * <em>head</em> of the queue is that element that has been on the * queue the longest time. The <em>tail</em> of the queue is that * element that has been on the queue the shortest time. New elements * are inserted at the tail of the queue, and the queue retrieval * operations obtain elements at the head of the queue. * <p>This is a classic "bounded buffer", in which a * fixed-sized array holds elements inserted by producers and * extracted by consumers. Once created, the capacity cannot be * changed. Attempts to {@code put} an element into a full queue * will result in the operation blocking; attempts to {@code take} an * element from an empty queue will similarly block. * <p>This class supports an optional fairness policy for ordering * waiting producer and consumer threads. By default, this ordering * is not guaranteed. However, a queue constructed with fairness set * to {@code true} grants threads access in FIFO order. Fairness * generally decreases throughput but reduces variability and avoids * starvation. * <p>This class and its iterator implement all of the * <em>optional</em> methods of the {@link Collection} and {@link * Iterator} interfaces. * <p>This class is a member of the * <a href="{@docRoot}/../technotes/guides/collections/index.html" rel="external nofollow" > * Java Collections Framework</a>. * @since 1.5 * @author Doug Lea * @param <E> the type of elements held in this collection **/
上述就是小編為大家分享的Java中怎么使用ArrayBlockingQueue解析阻塞隊列了,如果剛好有類似的疑惑,不妨參照上述分析進行理解。如果想知道更多相關知識,歡迎關注億速云行業資訊頻道。
免責聲明:本站發布的內容(圖片、視頻和文字)以原創、轉載和分享為主,文章觀點不代表本網站立場,如果涉及侵權請聯系站長郵箱:is@yisu.com進行舉報,并提供相關證據,一經查實,將立刻刪除涉嫌侵權內容。