java集合类深的实例用法

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在做云计算xenserverAPI 连接xenserver和关闭xenserver时候，由于有定时任务每分钟刷新一次，定时任务中存取数据时候会经常的连接和关闭xenserver,造成xenserver的连接阻塞，所以把连接放入队列中进行连接和断开…………

/**  * xenserverAPI调用接口 * @author hanxuan  * @version 2016-12-14 */public class XenPool {private static Logger logger = Logger.getLogger(XenPool.class);private static final int XENSERVER_POOL_CAPACITY=20;private static Map> pool = new ConcurrentHashMap(100);public XenPool(){}public synchronized static Connection getConnect(XenServer xenServer) {        URL url =null;try {            url = new URL(xenServer.Hostname);        } catch (MalformedURLException e) {            e.printStackTrace();return null;        }        String host=url.getHost();        Queue queue = pool.get(host);        Connection connection = null;if (queue != null) {            Object conn = queue.poll();if (conn != null) {                connection = (Connection) conn;            }        }if (connection==null){try {                connection = new Connection(new URL(xenServer.Hostname), XenServer.REPLY_WAIT, XenServer.CONNECT_WAIT);            } catch (MalformedURLException e) {logger.error("xenserver[" + xenServer.Hostname + "]建立连接异常!",e);            }try {                Session.loginWithPassword(connection, xenServer.Username, SystemService.decryptPassword(xenServer.Password), APIVersion.latest().toString());            } catch (Types.XenAPIException e) {logger.error("xenserver[" + xenServer.Hostname + "]XenAPIException异常!",e);            } catch (XmlRpcException e) {logger.error("xenserver[" + xenServer.Hostname + "]XmlRpcException异常!",e);            }        }return connection;    }public static void disconnect (Connection connection) {        String host= null;try {            host = connection.getConfig().getServerURL().getHost();        } catch (Exception e) {            e.printStackTrace();return;        }        Queue queue = pool.get(host);if (queue==null){            queue = new ArrayBlockingQueue(XENSERVER_POOL_CAPACITY);pool.put(host, queue);        }boolean flag=queue.offer(connection);if (!flag){//当连接不用时放到队列里            try {                Session.logout(connection);            } catch (Types.XenAPIException e) {logger.error("xenserver[" + host + "]释放异常!",e);            } catch (XmlRpcException e) {logger.error("xenserver[" + host + "]释放异常!",e);            }        }    }}

感谢各位的阅读，以上就是"java集合类深的实例用法"的内容了，经过本文的学习后，相信大家对java集合类深的实例用法这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是，小编将为大家推送更多相关知识点的文章，欢迎关注！