Version 2.1 (#41)
- Add full chapter support (#6) - Add built-in redirect functionality (#39) - Support building Docker containers for release (#38) - Support canonical domain configuration (#37) - Add unit tests for domain/models and integration tests for all three data stores - Convert SQLite storage to use JSON documents, similar to PostgreSQL - Convert admin templates to Giraffe View Engine (from Liquid) - Add .NET 8 support
This commit was merged in pull request #41.
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@@ -2,38 +2,37 @@ namespace MyWebLog.Data.Postgres
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open System.Threading
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open System.Threading.Tasks
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open BitBadger.Npgsql.FSharp.Documents
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open BitBadger.Documents.Postgres
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open Microsoft.Extensions.Caching.Distributed
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open NodaTime
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open Npgsql.FSharp
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/// Helper types and functions for the cache
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[<AutoOpen>]
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module private Helpers =
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/// The cache entry
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type Entry =
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{ /// The ID of the cache entry
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Id : string
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/// The value to be cached
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Payload : byte[]
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/// When this entry will expire
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ExpireAt : Instant
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/// The duration by which the expiration should be pushed out when being refreshed
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SlidingExpiration : Duration option
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/// The must-expire-by date/time for the cache entry
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AbsoluteExpiration : Instant option
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}
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type Entry = {
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/// The ID of the cache entry
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Id: string
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/// The value to be cached
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Payload: byte array
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/// When this entry will expire
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ExpireAt: Instant
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/// The duration by which the expiration should be pushed out when being refreshed
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SlidingExpiration: Duration option
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/// The must-expire-by date/time for the cache entry
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AbsoluteExpiration: Instant option
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}
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/// Run a task synchronously
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let sync<'T> (it : Task<'T>) = it |> (Async.AwaitTask >> Async.RunSynchronously)
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let sync<'T> (it: Task<'T>) = it |> (Async.AwaitTask >> Async.RunSynchronously)
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/// Get the current instant
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let getNow () = SystemClock.Instance.GetCurrentInstant ()
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let getNow () = SystemClock.Instance.GetCurrentInstant()
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/// Create a parameter for the expire-at time
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let expireParam =
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@@ -49,9 +48,11 @@ type DistributedCache () =
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task {
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let! exists =
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Custom.scalar
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$"SELECT EXISTS
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(SELECT 1 FROM pg_tables WHERE schemaname = 'public' AND tablename = 'session')
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AS {existsName}" [] Map.toExists
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"SELECT EXISTS
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(SELECT 1 FROM pg_tables WHERE schemaname = 'public' AND tablename = 'session')
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AS it"
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[]
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toExists
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if not exists then
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do! Custom.nonQuery
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"CREATE TABLE session (
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@@ -69,13 +70,15 @@ type DistributedCache () =
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let getEntry key = backgroundTask {
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let idParam = "@id", Sql.string key
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let! tryEntry =
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Custom.single "SELECT * FROM session WHERE id = @id" [ idParam ]
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(fun row ->
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{ Id = row.string "id"
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Payload = row.bytea "payload"
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ExpireAt = row.fieldValue<Instant> "expire_at"
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SlidingExpiration = row.fieldValueOrNone<Duration> "sliding_expiration"
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AbsoluteExpiration = row.fieldValueOrNone<Instant> "absolute_expiration" })
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Custom.single
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"SELECT * FROM session WHERE id = @id"
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[ idParam ]
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(fun row ->
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{ Id = row.string "id"
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Payload = row.bytea "payload"
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ExpireAt = row.fieldValue<Instant> "expire_at"
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SlidingExpiration = row.fieldValueOrNone<Duration> "sliding_expiration"
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AbsoluteExpiration = row.fieldValueOrNone<Instant> "absolute_expiration" })
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match tryEntry with
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| Some entry ->
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let now = getNow ()
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@@ -88,8 +91,9 @@ type DistributedCache () =
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true, { entry with ExpireAt = absExp }
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else true, { entry with ExpireAt = now.Plus slideExp }
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if needsRefresh then
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do! Custom.nonQuery "UPDATE session SET expire_at = @expireAt WHERE id = @id"
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[ expireParam item.ExpireAt; idParam ]
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do! Custom.nonQuery
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"UPDATE session SET expire_at = @expireAt WHERE id = @id"
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[ expireParam item.ExpireAt; idParam ]
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()
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return if item.ExpireAt > now then Some entry else None
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| None -> return None
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@@ -101,17 +105,17 @@ type DistributedCache () =
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/// Purge expired entries every 30 minutes
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let purge () = backgroundTask {
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let now = getNow ()
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if lastPurge.Plus (Duration.FromMinutes 30L) < now then
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if lastPurge.Plus(Duration.FromMinutes 30L) < now then
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do! Custom.nonQuery "DELETE FROM session WHERE expire_at < @expireAt" [ expireParam now ]
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lastPurge <- now
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}
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/// Remove a cache entry
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let removeEntry key =
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Delete.byId "session" key
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Custom.nonQuery "DELETE FROM session WHERE id = @id" [ "@id", Sql.string key ]
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/// Save an entry
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let saveEntry (opts : DistributedCacheEntryOptions) key payload =
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let saveEntry (opts: DistributedCacheEntryOptions) key payload =
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let now = getNow ()
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let expireAt, slideExp, absExp =
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if opts.SlidingExpiration.HasValue then
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@@ -121,7 +125,7 @@ type DistributedCache () =
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let exp = Instant.FromDateTimeOffset opts.AbsoluteExpiration.Value
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exp, None, Some exp
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elif opts.AbsoluteExpirationRelativeToNow.HasValue then
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let exp = now.Plus (Duration.FromTimeSpan opts.AbsoluteExpirationRelativeToNow.Value)
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let exp = now.Plus(Duration.FromTimeSpan opts.AbsoluteExpirationRelativeToNow.Value)
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exp, None, Some exp
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else
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// Default to 1 hour sliding expiration
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@@ -146,7 +150,7 @@ type DistributedCache () =
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// ~~~ IMPLEMENTATION FUNCTIONS ~~~
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/// Retrieve the data for a cache entry
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let get key (_ : CancellationToken) = backgroundTask {
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let get key (_: CancellationToken) = backgroundTask {
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match! getEntry key with
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| Some entry ->
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do! purge ()
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@@ -155,29 +159,29 @@ type DistributedCache () =
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}
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/// Refresh an entry
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let refresh key (cancelToken : CancellationToken) = backgroundTask {
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let refresh key (cancelToken: CancellationToken) = backgroundTask {
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let! _ = get key cancelToken
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()
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}
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/// Remove an entry
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let remove key (_ : CancellationToken) = backgroundTask {
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let remove key (_: CancellationToken) = backgroundTask {
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do! removeEntry key
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do! purge ()
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}
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/// Set an entry
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let set key value options (_ : CancellationToken) = backgroundTask {
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let set key value options (_: CancellationToken) = backgroundTask {
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do! saveEntry options key value
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do! purge ()
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}
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interface IDistributedCache with
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member _.Get key = get key CancellationToken.None |> sync
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member _.GetAsync (key, token) = get key token
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member _.GetAsync(key, token) = get key token
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member _.Refresh key = refresh key CancellationToken.None |> sync
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member _.RefreshAsync (key, token) = refresh key token
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member _.RefreshAsync(key, token) = refresh key token
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member _.Remove key = remove key CancellationToken.None |> sync
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member _.RemoveAsync (key, token) = remove key token
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member _.Set (key, value, options) = set key value options CancellationToken.None |> sync
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member _.SetAsync (key, value, options, token) = set key value options token
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member _.RemoveAsync(key, token) = remove key token
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member _.Set(key, value, options) = set key value options CancellationToken.None |> sync
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member _.SetAsync(key, value, options, token) = set key value options token
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