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对Azure二次开发,解决资源“独占访问”的问题

时间:2015-02-14 00:57:51      阅读:247      评论:0      收藏:0      [点我收藏+]

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Azure二次开发,解决资源独占访问的问题

在对Azure 进行二次开发过程中,首当其冲就是明白Azure的具体的交互逻辑消息机制数据管理,在说问题前,我想你对于Rest API 的使用,至少有了初步的了解。这里,我就不多说,微软给我最巨大的印象就是它的文档,如果,你还有些不了解,请参考“Microsoft Developer Network”服务管理Rest API参考,链接是https://msdn.microsoft.com/zh-cn/library/ee460799.aspx;

 

那么下面我们就详细的讨论下,资源必须要独占访问的缘由:

打开IE ,访问Windows Azure 世纪互联的门户网站https://manage.windowsazure.cn/,先在Azure上创建一台虚机,因为下面我将会利用虚机的端口配置,去说明这个问题,让大家可以动手去操作端口,加深理解;

技术分享

点击虚机名称,找到 端点“Tab

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下面我们就对当前虚机,进行端口的配置:

技术分享

 

开始创建端口,这里,我就简单的配置下HTTP 80端口;

技术分享

 

点击提交按钮后,你会有所发现,页面工具栏显示灰色,且不能点击

技术分享

 

这里,细心的开发人员,会发现当前资源在被执行某个功能时,其他的按钮都无法操作,当然,除了虚机端点外,很多地方都是这样!

 

在利用Rest API 去发送请求后,它返回标准HTTP的状态代码,就好像页面视图执行操作后,返回”500“错误码一样。等同于,我利用API发送请求执行 某个虚机新增端口,这个过程,你可以通过Windows Azure 门户网站看到,正在新增端口,可这个时候,突然出现一次意外,我在第一次发送的新增端口请求,可还没有新增完成后,我又再次发送了一次新增端口的请求。这时,我通过try catch 捕获到一条错误信息,提示“******某某资源必须要独占访问**********”(这里,我只是写个大概提示);

        这时,我必须在代码中添加  判断资源是否被独占访问中逻辑,下面我就在代码中实现这个逻辑:

 

/// 返回部署的配置信息、状态和系统属性

        /// </summary>

        /// <param name="SubscriptionID"></param>

        /// <param name="ServiceName"></param>

        /// <param name="DeploymentName"></param>

        /// <returns></returns>

        public AzureVMDeploymentInfo GetAzureDeploymentInfo(string SubscriptionID, string ServiceName, string DeploymentName)

        {

            AzureVMDeploymentInfo rtn = null;

            RestClient client = GetAzureRestClient(this.ApiAddress, this.CertificatePath);

            var req = new RestRequest();

            req.AddHeader("Content-Type", "application/xml");

            req.Resource = SubscriptionID + "/" + "services/hostedservices/" + ServiceName + "/deployments/" + DeploymentName;

            var rep = client.Execute(req);

            rtn = GetAzureDeploymentInfo(rep);

            return rtn;

        }

 

/// 获取部署属性

        /// </summary>

        /// <param name="DeployResponse"></param>

        /// <returns></returns>

        private AzureVMDeploymentInfo GetAzureDeploymentInfo(IRestResponse DeployResponse)

        {

            AzureVMDeploymentInfo rtn = null;

            if (DeployResponse.StatusCode == HttpStatusCode.OK)

            {

                #region

                rtn = new AzureVMDeploymentInfo();

                var xmlContentDoc = System.Xml.Linq.XDocument.Parse(DeployResponse.Content);

                var rootNode = xmlContentDoc.Root;

 

                rtn = new AzureVMDeploymentInfo();

                rtn.DeploymentName = rootNode.Element(rootNode.Name.Namespace + "Name").Value;

                rtn.DeploymentSlot = rootNode.Element(rootNode.Name.Namespace + "DeploymentSlot").Value;

                rtn.Status = rootNode.Element(rootNode.Name.Namespace + "Status") != null ?

                    rootNode.Element(rootNode.Name.Namespace + "Status").Value : "";

                rtn.PrivateID = rootNode.Element(rootNode.Name.Namespace + "PrivateID") != null ?

                    rootNode.Element(rootNode.Name.Namespace + "PrivateID").Value : "";

                rtn.DeploymentLabel = rootNode.Element(rootNode.Name.Namespace + "Label") != null ?

                    rootNode.Element(rootNode.Name.Namespace + "Label").Value : "";

                rtn.Url = rootNode.Element(rootNode.Name.Namespace + "Url") != null ?

                    rootNode.Element(rootNode.Name.Namespace + "Url").Value : "";

                rtn.Configuration = rootNode.Element(rootNode.Name.Namespace + "Configuration") != null ?

                    rootNode.Element(rootNode.Name.Namespace + "Configuration").Value : "";

                rtn.SdkVersion = rootNode.Element(rootNode.Name.Namespace + "SdkVersion") != null ?

                    rootNode.Element(rootNode.Name.Namespace + "SdkVersion").Value : "";

                rtn.Locked = rootNode.Element(rootNode.Name.Namespace + "Locked") != null ?

                    bool.Parse(rootNode.Element(rootNode.Name.Namespace + "Locked").Value) : false;

                rtn.RollbackAllowed = rootNode.Element(rootNode.Name.Namespace + "RollbackAllowed") != null ?

                    bool.Parse(rootNode.Element(rootNode.Name.Namespace + "RollbackAllowed").Value) : false;

                rtn.VirtualNetworkName = rootNode.Element(rootNode.Name.Namespace + "VirtualNetworkName") != null ?

                    rootNode.Element(rootNode.Name.Namespace + "VirtualNetworkName").Value : "";

                rtn.ReservedIPName = rootNode.Element(rootNode.Name.Namespace + "ReservedIPName") != null ?

                    rootNode.Element(rootNode.Name.Namespace + "ReservedIPName").Value : "";

                rtn.InternalDnsSuffix = rootNode.Element(rootNode.Name.Namespace + "InternalDnsSuffix") != null ?

                    rootNode.Element(rootNode.Name.Namespace + "InternalDnsSuffix").Value : "";

                #endregion

 

            }

            else

            {

                HttpErrorCodeHandler(DeployResponse);

            }

            return rtn;

        }

 

 

        /// 处理RestAPI返回的异常信息

        /// </summary>

        /// <param name="rep"></param>

        private void HttpErrorCodeHandler(IRestResponse rep)

        {

            if (rep.StatusCode == HttpStatusCode.Accepted

                || rep.StatusCode == HttpStatusCode.Created

                || rep.StatusCode == HttpStatusCode.OK

                || rep.StatusCode == HttpStatusCode.NotFound)

            {

                return;

            }

 

            var ex = new AzureException();

            var error = GetError(rep);

            ex.ErrorMessage = error;

            ex.API_Http_Code = rep.StatusCode;

            throw ex;

        }

 

 

对Azure二次开发,解决资源“独占访问”的问题

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原文地址:http://www.cnblogs.com/finehappy/p/4291050.html

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