SUMMARY

The Business Connectivity Services capabilities in SharePoint 2010 on-premises and then in SharePoint (2010) Online remain consistent in SharePoint 2013. At the heart of BCS is the external content type, which has supported connectivity across a variety of external data sources, such as Web services, SQL Server databases, and custom business objects. Some of the gains for developers in this version of SharePoint include the OData connector as the basis for the ECT, REST access to external lists, broader and deeper capabilities in CSOM, and with the advent of the new cloud app model, the ability for app-level ECTs to bring LOB data into your app for SharePoint solutions — whether the app is Provider hosted, Autohosted or SharePoint hosted.

In SharePoint 2013, BCS becomes a first-class citizen in the SharePoint event infrastructure. Alerts on external lists are now available as with any other SharePoint list. Also, events can fire on external lists given that the LOB external system has a mechanism in place to detect underlying data changes and can support the ECT notification infrastructure via the exchange of information between the external system and SharePoint during the subscribe process. Given that external system notifications are in place, you can now write remote event receiver code for these external list events as described in Chapter 12.

EXERCISES
You can find answers to exercises in Appendix A.
1. What is the new connector that has been added to BCS?
2. To interact with data in an external list, what two technologies might you use in your code?
3. What are the new stereotypes added to the BDC Model schema that enable notification of data changes in external LOB systems?
4. With the advent of the cloud app model, what is the new capability for ECTs?

WHAT YOU LEARNED IN THIS CHAPTER

ITEM DESCRIPTION
OData Connector External content types can now be based off an OData connection to an LOB system.
Data Access External lists now support REST and the CSOM capabilities have been broadened and deepened.
App-level ECTs With the advent of the cloud app model, ECTs can be part of an app for SharePoint solutions whether the app is Provider-hosted, Autohosted, or SharePoint-hosted.
External List Events BCS now participates fully in the SharePoint event infrastructure and can take advantage of alerts and fire events on LOB data changes given that notifications are configured between the ECT and the LOB External System.
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