3455f491ca
This commit adds and passes context around to (almost) every function. This allows cancelling (almost) every function call globally.
77 lines
1.9 KiB
Go
77 lines
1.9 KiB
Go
package barrel
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import (
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"context"
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"time"
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"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
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"github.com/FAU-CDI/wisski-distillery/internal/dis/component/meta"
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"github.com/FAU-CDI/wisski-distillery/internal/status"
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"github.com/FAU-CDI/wisski-distillery/internal/wisski/ingredient"
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"github.com/FAU-CDI/wisski-distillery/internal/wisski/ingredient/locker"
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"github.com/FAU-CDI/wisski-distillery/internal/wisski/ingredient/mstore"
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"github.com/tkw1536/goprogram/stream"
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)
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// Build builds or rebuilds the barel connected to this instance.
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//
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// It also logs the current time into the metadata belonging to this instance.
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func (barrel *Barrel) Build(ctx context.Context, stream stream.IOStream, start bool) error {
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if !barrel.Locker.TryLock(ctx) {
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err := locker.Locked
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return err
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}
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defer barrel.Locker.Unlock(ctx)
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stack := barrel.Stack()
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var context component.InstallationContext
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{
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err := stack.Install(ctx, stream, context)
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if err != nil {
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return err
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}
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}
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{
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err := stack.Update(ctx, stream, start)
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if err != nil {
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return err
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}
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}
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// store the current last rebuild
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return barrel.setLastRebuild(ctx)
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}
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// TODO: Move this to time.Time
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var lastRebuild = mstore.For[int64]("lastRebuild")
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func (barrel Barrel) LastRebuild(ctx context.Context) (t time.Time, err error) {
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epoch, err := lastRebuild.Get(ctx, barrel.MStore)
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if err == meta.ErrMetadatumNotSet {
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return t, nil
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}
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if err != nil {
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return t, err
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}
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// and turn it into time!
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return time.Unix(epoch, 0), nil
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}
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func (barrel *Barrel) setLastRebuild(ctx context.Context) error {
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return lastRebuild.Set(ctx, barrel.MStore, time.Now().Unix())
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}
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type LastRebuildFetcher struct {
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ingredient.Base
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Barrel *Barrel
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}
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func (lbr *LastRebuildFetcher) Fetch(ctx context.Context, flags ingredient.FetcherFlags, info *status.WissKI) (err error) {
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info.LastRebuild, _ = lbr.Barrel.LastRebuild(ctx)
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return
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}
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