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Listen for textile client updates (#220)
* WIP: Textile listener * WIP: textile client listener connecting but not receiving * Use replicator for metathread * clean up * Merge with develop and connect with restorer * Fix segfault on metathread creation * Prevent segfault * Allow enqueing repeating tasks when the old one already completed * Fix tests
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| package textile | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
|
|
||
| "github.com/FleekHQ/space-daemon/core/textile/utils" | ||
| "github.com/textileio/go-threads/api/client" | ||
| threadsClient "github.com/textileio/go-threads/api/client" | ||
| ) | ||
|
|
||
| func (tc *textileClient) Listen(ctx context.Context, dbID, threadName string) (<-chan threadsClient.ListenEvent, error) { | ||
| db, err := utils.ParseDbIDFromString(dbID) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| newCtx, err := utils.GetThreadContext(ctx, "", *db, true, tc.kc, tc.hubAuth, tc.ht) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return tc.ht.Listen(newCtx, *db, nil) | ||
| } | ||
|
|
||
| func (tc *textileClient) addListener(ctx context.Context, bucketSlug string) error { | ||
| if err := tc.requiresHubConnection(); err != nil { | ||
| return err | ||
| } | ||
| handler := newRestorerListenerHandler(tc.sync) | ||
| handlers := []EventHandler{handler} | ||
| listener := NewListener(tc, bucketSlug, handlers) | ||
| tc.dbListeners[bucketSlug] = listener | ||
|
|
||
| go func() { | ||
| err := listener.Listen(ctx) | ||
| if err != nil { | ||
| // Remove element from map as it's not listening anymore | ||
| delete(tc.dbListeners, bucketSlug) | ||
| } | ||
| }() | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (tc *textileClient) initializeListeners(ctx context.Context) error { | ||
| if err := tc.requiresHubConnection(); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| tc.closeListeners() | ||
|
|
||
| buckets, err := tc.listBuckets(ctx) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| for _, bucket := range buckets { | ||
| tc.addListener(ctx, bucket.Slug()) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (tc *textileClient) closeListeners() { | ||
| for key, listener := range tc.dbListeners { | ||
| listener.Close() | ||
| delete(tc.dbListeners, key) | ||
| } | ||
|
|
||
| } | ||
|
|
||
| type listener struct { | ||
| client Client | ||
| bucketSlug string | ||
| handlers []EventHandler | ||
| shutdown chan (bool) | ||
| } | ||
|
|
||
| func NewListener(client Client, bucketSlug string, handlers []EventHandler) *listener { | ||
| return &listener{ | ||
| client: client, | ||
| bucketSlug: bucketSlug, | ||
| handlers: handlers, | ||
| shutdown: make(chan (bool)), | ||
| } | ||
| } | ||
|
|
||
| func (l *listener) Listen(ctx context.Context) error { | ||
| bucketSchema, err := l.client.GetModel().FindBucket(ctx, l.bucketSlug) | ||
| if bucketSchema == nil || bucketSchema.RemoteDbID == "" { | ||
| return errors.New("Bucket does not have a linked mirror bucket") | ||
| } | ||
|
|
||
| bucket, err := l.client.GetBucket(ctx, l.bucketSlug, nil) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| bucketData := bucket.GetData() | ||
|
|
||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| eventChan, err := l.client.Listen(ctx, bucketSchema.RemoteDbID, bucketSchema.RemoteBucketSlug) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| Loop: | ||
| for { | ||
| select { | ||
| case ev := <-eventChan: | ||
| if ev.Err != nil { | ||
| return ev.Err | ||
| } | ||
|
|
||
| for _, handler := range l.handlers { | ||
| switch ev.Action.Type { | ||
| case client.ActionCreate: | ||
| handler.OnCreate(&bucketData, &ev) | ||
| case client.ActionSave: | ||
| handler.OnSave(&bucketData, &ev) | ||
| case client.ActionDelete: | ||
| handler.OnRemove(&bucketData, &ev) | ||
| } | ||
| } | ||
| case <-l.shutdown: | ||
| break Loop | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (l *listener) Close() { | ||
| l.shutdown <- true | ||
| } |
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