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FSharp.Azure.Storage

FSharp.Azure.Storage is a wrapper over the standard Microsoft Microsoft.Azure.Cosmos.Table library that allows you to write idiomatic F# when talking to Azure.

The standard storage API is fine when you're writing C#, however when you're using F# you want to be able to use immutable record types, use the native F# async support and generally write in a functional style.

NuGet

Install-Package FSharp.Azure.Storage

A Quick Taster

Inserting/Updating Table Storage

Imagine we had a record type that we wanted to save into table storage:

open FSharp.Azure.Storage.Table

type Game =
    { [<PartitionKey>] Developer: string
      [<RowKey>] Name: string
      HasMultiplayer: bool }

Now we'll define a helper function inGameTable that will allow us to persist these Game records to table storage into an existing table called "Games":

open Microsoft.Azure.Cosmos.Table

let account = CloudStorageAccount.Parse "UseDevelopmentStorage=true;" //Or your connection string here
let tableClient = account.CreateCloudTableClient()

let inGameTable game = inTable tableClient "Games" game

Now that the set up ceremony is done, let's insert a new Game into table storage:

let game = { Developer = "343 Industries"; Name = "Halo 4"; HasMultiplayer = true }

let result = game |> Insert |> inGameTable

Let's say we want to modify this game and update it in table storage:

let modifiedGame = { game with HasMultiplayer = false }

let result2 = (modifiedGame, result.Etag) |> Replace |> inGameTable

Querying Table Storage

First we need to set up a little helper function for querying from the "Games" table:

let fromGameTable q = fromTable tableClient "Games" q

Here's how we'd query for an individual record by PartitionKey and RowKey:

let halo4, metadata =
    Query.all<Game>
    |> Query.where <@ fun g s -> s.PartitionKey = "343 Industries" && s.RowKey = "Halo 4" @>
    |> fromGameTable
    |> Seq.head

If we wanted to find all multiplayer games made by Valve:

let multiplayerValveGames =
    Query.all<Game>
    |> Query.where <@ fun g s -> s.PartitionKey = "Valve" && g.HasMultiplayer @>
    |> fromGameTable

Further Information

For further documentation and examples, please visit the wiki.

Building

Run build.cmd or build.sh to restore the required dependencies using Paket and then build and run tests using FAKE. You can also build in Visual Studio.

By default, the tests run against the Azure Storage Emulator. However, you can run them against any storage account by setting the FSHARP_AZURE_STORAGE_CONNECTION_STRING environment variable to an Azure Storage account connection string before running the tests.

AppVeyor (Windows)

Travis (Linux)

Maintainer(s)

• @daniel-chambers

The default maintainer account for projects under "fsprojects" is @fsprojectsgit - F# Community Project Incubation Space (repo management)