FSFabric

A collection of utilities for working with Service Fabric in F#.

Modules

Currently, only one module exists within FSFabric: FabricStore.

FabricStore

FabricStore lifts operating on IReliableDictionarys into the AsyncSeq space. Evaluations are lazy evaluated, and when possible, use native calls (eg. AddOrUpdateAsync()). However, the majority of applications require enumerating the dictionary, so caution is advised.

FabricStore is very simple to use:

Querying a Fabric Store, then updating it We will:

• Query a dictionary for all items that start with 'x'
• Update each of those values to have a property "Age" that is increased by 1.
• Update each of these items
• Commit these to the store
• Return the first such updated item

Note:

• >>= corresponds to Async.bind

This operator is included under FSFabric.Async.Operators, if they have not been added to your code already.

FabricStore.initDict<string, Person> stateManager "MyDictionaryName"
>>= FabricStore.filter (fun (k, _) -> k.StartsWith("x"))
>>= FabricStore.map (fun (k, v) -> k, { v with Age = v.Age + 1 })
>>= FabricStore.update "MyDictionaryName"
>>= FabricStore.commit
>>= FabricStore.tryFirst

A FabricStore has three stages:

• Closed: Has no open transaction.
• Open: Has an open transaction.
• OutsideOpenedStore: Transaction was provided with useTx, allowing transactions to be shared between FabricStores.

The above case automatically creates a transaction, and then closes it with the commit call. commit and close both end a transaction that was opened automatically, while neither will close a transaction provided with useTx. External transactions must be closed manually.