Developing applications for Sharepoint 2010 from Pattern & Practices

from Sharepoint team blog

“SharePoint 2010 introduces new ways of developing applications for the SharePoint platform. With SharePoint 2010, you can build multi-tenant, hosted applications on an infrastructure that is scalable, secure, and stable. You can create powerful, data-driven solutions using SharePoint lists or external data. You can create client-side functionality that takes advantage of modern browser capabilities and Silverlight to provide a rich user experience. These new features, operational models, and development tools make SharePoint a more complete application platform, and it also introduces new design and development decisions for customers. This guidance helps customers understand the decision points, tradeoffs, and performance implications that the new functionality introduces; it also helps customers learn how to take best advantage of the new capabilities that SharePoint 2010 provides.”

Download the guide from here

 

Component	Description
The guide		"Application Foundations for SharePoint 2010" describes approaches you can use to address the challenges of testability, flexibility, configuration, logging and exception handling, and maintainability; it also explains how to use the SharePoint Guidance Library components in these areas. "Execution Models in SharePoint 2010" provides deep technical insights into the mechanics of the full-trust execution environment, the sandbox execution environment, and various hybrid approaches to executing code in SharePoint applications. "Data Models in SharePoint 2010" explains new list and external data functionality and data access techniques, key design decision points that can help you to choose between standard SharePoint lists and external lists, and techniques and patterns to address large lists and list aggregation. "Client Models in SharePoint 2010" provides guidance on how to best use the new client-side functionality to access data and build richer client experiences with Silverlight and Ajax. Each section also contains a set of how-to topics. These explain how to perform specific tasks that the team found challenging to discover.
Reference implementations		This release includes eight reference implementations that you can deploy to a SharePoint 2010 test environment. The reference implementations reinforce the key concepts in the guide and illustrate how to build applications that reflect real-world scenarios. Each reference implementation includes a detailed scenario and design overview, an explanation of the design decisions the team faced for the implementation, and an installation script to automate setup. This release includes reference implementations for the following scenarios: ·         Sandboxed solution ·         Sandboxed solution with a full-trust proxy ·         Sandboxed solution with External List ·         Sandboxed solution with custom workflow activities ·         Farm Solution (timer job) ·         SharePoint List Data Models ·         External Data Models ·         Client Application Models
The SharePoint Guidance Library		The library is a collection of reusable classes delivered as source code that address common challenges in application development for the SharePoint platform. This release improves on the previous release of the library by adding support for sandboxed solutions and taking advantage of new SharePoint features. The SharePoint Guidance Library consists of three key components: ·         SharePoint Service Locator. This provides a simple implementation of the Service Locator pattern for SharePoint applications. The service locator enables you to isolate your code from dependencies on external types, which makes your code more modular, easier to test, and easier to maintain. ·         Application Settings Manager. This provides a robust and consistent mechanism for storing and retrieving configuration settings at each level of the SharePoint hierarchy, from individual sites (SPWeb) to the entire server farm (SPFarm). ·         SharePoint Logger. This provides easy-to-use utility methods that you can employ to write information to the Windows Event log and the SharePoint Unified Logging Service (ULS) trace log. It also enables you to create custom diagnostic areas and categories for logging.