src/nms-api/Util/SessionUtils.cs

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System;

namespace Apache.NMS.Util
{
    /// <summary>
    /// Class to provide support for working with Session objects.
    /// </summary>
    public class SessionUtil
    {
        private const string QueuePrefix = "queue://";
        private const string TopicPrefix = "topic://";
        private const string TempQueuePrefix = "temp-queue://";
        private const string TempTopicPrefix = "temp-topic://";

        /// <summary>
        /// Get the destination by parsing the embedded type prefix.  Default is Queue if no prefix is
        /// embedded in the destinationName.
        /// </summary>
        /// <param name="session">Session object to use to get the destination.</param>
        /// <param name="destinationName">Name of destination with embedded prefix.  The embedded prefix can be one of the following:
        ///		<list type="bullet">
        ///			<item>queue://</item>
        ///			<item>topic://</item>
        ///			<item>temp-queue://</item>
        ///			<item>temp-topic://</item>
        ///		</list>
        ///	</param>
        /// <returns></returns>
        public static IDestination GetDestination(ISession session, string destinationName)
        {
            return SessionUtil.GetDestination(session, destinationName, DestinationType.Queue);
        }

        /// <summary>
        /// Get the destination by parsing the embedded type prefix.
        /// </summary>
        /// <param name="session">Session object to use to get the destination.</param>
        /// <param name="destinationName">Name of destination with embedded prefix.  The embedded prefix can be one of the following:
        ///		<list type="bullet">
        ///			<item>queue://</item>
        ///			<item>topic://</item>
        ///			<item>temp-queue://</item>
        ///			<item>temp-topic://</item>
        ///		</list>
        ///	</param>
        /// <param name="defaultType">Default type if no embedded prefix is specified.</param>
        /// <returns></returns>
        public static IDestination GetDestination(ISession session, string destinationName, DestinationType defaultType)
        {
            IDestination destination = null;
            DestinationType destinationType = defaultType;

            if (null != destinationName)
            {
                if (destinationName.Length > QueuePrefix.Length
                    && 0 == String.Compare(destinationName.Substring(0, QueuePrefix.Length), QueuePrefix, false))
                {
                    destinationType = DestinationType.Queue;
                    destinationName = destinationName.Substring(QueuePrefix.Length);
                }
                else if (destinationName.Length > TopicPrefix.Length
                         && 0 == String.Compare(destinationName.Substring(0, TopicPrefix.Length), TopicPrefix, false))
                {
                    destinationType = DestinationType.Topic;
                    destinationName = destinationName.Substring(TopicPrefix.Length);
                }
                else if (destinationName.Length > TempQueuePrefix.Length
                         && 0 == String.Compare(destinationName.Substring(0, TempQueuePrefix.Length), TempQueuePrefix,
                             false))
                {
                    destinationType = DestinationType.TemporaryQueue;
                    destinationName = destinationName.Substring(TempQueuePrefix.Length);
                }
                else if (destinationName.Length > TempTopicPrefix.Length
                         && 0 == String.Compare(destinationName.Substring(0, TempTopicPrefix.Length), TempTopicPrefix,
                             false))
                {
                    destinationType = DestinationType.TemporaryTopic;
                    destinationName = destinationName.Substring(TempTopicPrefix.Length);
                }
            }

            switch (destinationType)
            {
                case DestinationType.Queue:
                    if (null != destinationName)
                    {
                        destination = session.GetQueue(destinationName);
                    }

                    break;

                case DestinationType.Topic:
                    if (null != destinationName)
                    {
                        destination = session.GetTopic(destinationName);
                    }

                    break;

                case DestinationType.TemporaryQueue:
                    destination = session.CreateTemporaryQueue();
                    break;

                case DestinationType.TemporaryTopic:
                    destination = session.CreateTemporaryTopic();
                    break;
            }

            return destination;
        }

        public static IQueue GetQueue(ISession session, string queueName)
        {
            return GetDestination(session, queueName, DestinationType.Queue) as IQueue;
        }

        public static ITopic GetTopic(ISession session, string topicName)
        {
            return GetDestination(session, topicName, DestinationType.Topic) as ITopic;
        }

        /// <summary>
        /// Delete the named destination by parsing the embedded type prefix.  Default is Queue if no prefix is
        /// embedded in the destinationName.
        /// </summary>
        /// <param name="session">Session object to use to get the destination.</param>
        /// <param name="destinationName">Name of destination with embedded prefix.  The embedded prefix can be one of the following:
        ///		<list type="bullet">
        ///			<item>queue://</item>
        ///			<item>topic://</item>
        ///			<item>temp-queue://</item>
        ///			<item>temp-topic://</item>
        ///		</list>
        ///	</param>
        /// <returns></returns>
        public static void DeleteDestination(ISession session, string destinationName)
        {
            SessionUtil.DeleteDestination(session, destinationName, DestinationType.Queue);
        }

        /// <summary>
        /// Delete the named destination by parsing the embedded type prefix.
        /// </summary>
        /// <param name="session">Session object to use to get the destination.</param>
        /// <param name="destinationName">Name of destination with embedded prefix.  The embedded prefix can be one of the following:
        ///		<list type="bullet">
        ///			<item>queue://</item>
        ///			<item>topic://</item>
        ///			<item>temp-queue://</item>
        ///			<item>temp-topic://</item>
        ///		</list>
        ///	</param>
        /// <param name="defaultType">Default type if no embedded prefix is specified.</param>
        /// <returns></returns>
        public static void DeleteDestination(ISession session, string destinationName, DestinationType defaultType)
        {
            IDestination destination = SessionUtil.GetDestination(session, destinationName, defaultType);

            if (null != destination)
            {
                session.DeleteDestination(destination);
            }
        }

        public static void DeleteQueue(ISession session, string queueName)
        {
            DeleteDestination(session, queueName, DestinationType.Queue);
        }

        public static void DeleteTopic(ISession session, string topicName)
        {
            DeleteDestination(session, topicName, DestinationType.Topic);
        }
    }
}