OData everywhere Matt Milner Pluralsight

Overview What and why of OData OData client ecosystem

OData We need another data access technology? ODBCOLE DB ADO RDO ADO.NET Linq to SQL Entity Framework DataSet Which of these is cross platform?

Open Data Protocol Open : HTTP, ATOMPub, JSON Data : Querying & updating Protocol : Data format, uri constraints, metadata

Protocol GET Accept: application/json GET Accept: application/json HTTP/ OK DataServiceVersion: 1.0; Content-Length: 876 Content-Type: application/json;charset=utf-8 {"d" : [ { "__metadata": { "uri": " "type": "TaskDBModel.Task" }, "TaskID": 2, "AssignedTo": "3", "DueDate": "\/Date( )\/", "Description": "hire HR manager", "Priority": 1, "PercentComplete": 25 } ] } HTTP/ OK DataServiceVersion: 1.0; Content-Length: 876 Content-Type: application/json;charset=utf-8 {"d" : [ { "__metadata": { "uri": " "type": "TaskDBModel.Task" }, "TaskID": 2, "AssignedTo": "3", "DueDate": "\/Date( )\/", "Description": "hire HR manager", "Priority": 1, "PercentComplete": 25 } ] }

POST HTTP/1.1 Content-Type: application/json Accept: application/json Content-Length: 153 {"Description":“Fire Sally","Priority":1,"PercentComplete":25, "DueDate":"\/Date( )\/","AssignedTo":"3"} POST HTTP/1.1 Content-Type: application/json Accept: application/json Content-Length: 153 {"Description":“Fire Sally","Priority":1,"PercentComplete":25, "DueDate":"\/Date( )\/","AssignedTo":"3"} Protocol HTTP/ Created DataServiceVersion: 1.0; Content-Length: 297 Location: Content-Type: application/json;charset=utf-8 { "d" : { "__metadata": { "uri": " "type": "TaskDBModel.Task" }, "TaskID": 5, "AssignedTo": "3", "DueDate": "\/Date( )\/", "Description": “Fire Sally", "Priority": 1, "PercentComplete": 25}} HTTP/ Created DataServiceVersion: 1.0; Content-Length: 297 Location: Content-Type: application/json;charset=utf-8 { "d" : { "__metadata": { "uri": " "type": "TaskDBModel.Task" }, "TaskID": 5, "AssignedTo": "3", "DueDate": "\/Date( )\/", "Description": “Fire Sally", "Priority": 1, "PercentComplete": 25}}

System query options OptionDescriptionExample $filterFilters the result set/Movies?$filter=Title eq ‘Star Wars’ $orderbySort the target resources/Movies?$orderby=Title desc $topReturn only the top n resources/Movies?$top=10 /Movies?$orderby=Title&$top=5 $skipSkip the first n resources/Movies?$skip=100&$top=10 $selectCreate a projection/Movies(1)/’Reviews?$select=rating,review er $inlinecountIncludes the total count/Movies?$top=100&$inlinecount=allpages $valueRetrieve a value without any surrounding metadata /Movies(2)/Title/$value $expandEager loading of specified elements /Movies(1)?$expand=Reviews

OData producers Producers SharePoint 2010 SQL Azure Azure Table Storage IBM WebSphere Data Market... Services Ebay Facebook Netflix Pluralsight

OData clients Windows.NETSilverlightPowerPivot Browsers AtomJavaScriptjQuery Open Source PHPRubyJava Mobile Win Phone 7 IPhone / IPad (objective C) Android

Windows /.NET  Add Service Reference  Managed data context  Full batching support  Databinding

Silverlight  DataServiceCollection – async load  Out of browser support  Browser or custom credentials (OOB)

PowerPivot  Analytics  Charting  Relationships

Browsers  JSON / ATOM  JavaScript library

Open source  Ruby = gem install ruby_odata  Java = RestLet extension  PHP = PHPDataSvcUtil

Phones  Native libraries for Mac and WP7  Restlet / java support on Android

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