Update application cache

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Ref country code : BE. Ref legal event code : MM. Ref country code : LU. Ref country code : MC. Ref country code : LI. Ref country code : FR. Payment date : Year of fee payment : 9. That is, if an application has updates available, the user typically has to become knowledgeable of the updates and physically navigate to a remote application store to obtain and install the updates before using the new content. This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description.

This Summary is not intended to identify key features or essential features of the claimed subject matter. Various embodiments enable installable applications that are to be used on a local client machine to utilize an application cache manifest file that resides remotely, on the web, to define various resources that are to be updated and available offline after the installed application has been deployed on the local client machine.

Installed applications can be considered as self-contained applications that run in their own environment and do not depend on or run in the Web browser. Whenever the content of the manifest file is updated on the web, the installed application automatically updates its local application cache resources and allows the installed application to use those resources offline. This is done without having to install a new update of the application or burden the user with having to navigate to a location to obtain the updated content.

Simon Facciol: " Multi-platform mobile application development using HTML5 ", 1 June , describes offline HTML5 mobile Web applications which make use of a manifest file stored on the web server of the website which points to the web application resources and further include downloading resources, caching them locally and providing using application cache when a user navigates to the application, regardless of the connection status.

Internet article " Introducing Client Application Deployment with ClickOne", publised October by Microsoft Developer Network , describes using an installation manifest file for application installation and a deployment manifest filed holding version information of an updated application assembly provided in a separate folder. The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit s of a reference number identifies the figure in which the reference number first appears.

The use of the same reference numbers in different instances in the description and the figures may indicate similar or identical items. Various embodiments enable installable applications that are to be used on a local client machine to utilize an application cache manifest file that resides remotely, on the web, to define various resources, e.

To this end, installed applications, in the context of this document, are not web browsers. Checking for updated content can take place immediately upon deployment, asynchronously following deployment, or can happen at first execution, or at every execution. This is done without having to install a new update of the application or burden the user with having to navigate to a location e. In the following discussion, an example environment is first described that may employ the techniques described herein.

Example procedures are then described which may be performed in the example environment as well as other environments. Consequently, performance of the example procedures is not the network limited to the example environment and the example environment is not limited to performance of the example procedures.

Environment includes a computing device also referred to as a "local client machine" having one or more processors , one or more computer-readable storage media , one or more applications and one or more installed applications that reside on the computer-readable storage media and which are executable by the processor Computing device can be embodied as any suitable computing device such as, by way of example and not limitation, a desktop computer, a portable computer, a handheld computer such as a personal digital assistant PDA , mobile phone, television, tablet computer, and the like.

One of a variety of different examples of a computing device is shown and described below in FIGS. Applications can include any suitable type of applications including, by way of example and not limitation, a web browser.

The web browser is configured to navigate via the network Although the network is illustrated as the Internet, the network may assume a wide variety of configurations. For example, the network may include a wide area network WAN , a local area network LAN , a wireless network, a public telephone network, an intranet, and so on.

Further, although a single network is shown, the network may be configured to include multiple networks. The browser, for instance, may be configured to navigate via the network to interact with content available from one or more web servers as well as communicate data to the one or more web servers , e. The web servers may be configured to provide one or more services that are accessible via the network Examples of such services include email, web pages, photo sharing sites, social networks, content sharing services, media streaming services, and so on.

One or more of the applications may also be configured to access the network , e. For example, one or more of the applications may be configured to communicate messages, such as email, instant messages, and so on. In additional examples, an application , for instance, may be configured to access a social network, obtain weather updates, interact with a bookstore service implemented by one or more of the web servers , support word processing, provide spreadsheet functionality, support creation and output of presentations, and so on.

Thus, applications may also be configured for a variety of functionality that may involve direct or indirect network access. For instance, the applications may include configuration settings and other data that may be leveraged locally by the application as well as synchronized with applications that are executed on another computing device.

In this way, these settings may be shared by the devices. A variety of other instances are also contemplated. Active Oldest Votes. Darin Dimitrov Darin Dimitrov k gold badges silver badges bronze badges.

It doesn't sound like he wants to change the value so it might not be an issue. It's read-only data. Paul, it will depend on what you are doing with the data. For example accessing the individual elements of the list using an index for reading is thread safe. It's an implementation detail though. On the other hand enumerating over the list is not thread safe.

So if you write a foreach loop over this list and you have 2 concurrent users running this loop on the same instance you might get into trouble. That being said, if this list "never" changes, why not store it in a static array instead. It rarely changes, but not never. I was planning to run a scheduled task that invokes UpdateCache in the background periodically. Where can i check the timeout value in IIS? It's under Advanced Properties on the ApplicationPool. Try explicitly setting absolute expiration when caching your object: HttpRuntime.

AddDays 20 , TimeSpan. Zero ; Note HttpRuntime is used instead of HttpContext for performance reasons even though the difference is minor. Dmitry Efimenko Dmitry Efimenko Sign up or log in Sign up using Google. Sign up using Facebook.

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Before starting with updating the cache, we need to know the current status. Based on this status, you can proceed with your next steps. Next step of this would be updating the cache where you will need the above code to check whether the cache is ready with update, whether it is downloading the new cache etc. To begin with, get the handle of the window.

Now check the status of the update. If it is ready for update, go ahead and swap the cache to reload the new manifest. Then reload the page with the latest files.

You can confirm this reload of browser page from the user and refresh it. If no update is there, you can skip this steps.