wehub-resource-sync
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95 lines
2.8 KiB
Go
95 lines
2.8 KiB
Go
package assignment
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import (
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"context"
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"sync"
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"github.com/cockroachdb/errors"
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"github.com/milvus-io/milvus/pkg/v3/proto/streamingpb"
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"github.com/milvus-io/milvus/pkg/v3/streaming/util/types"
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"github.com/milvus-io/milvus/pkg/v3/util/replicateutil"
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"github.com/milvus-io/milvus/pkg/v3/util/syncutil"
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"github.com/milvus-io/milvus/pkg/v3/util/typeutil"
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)
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var ErrWatcherClosed = errors.New("watcher is closed")
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// newWatcher creates a new watcher.
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func newWatcher() *watcher {
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return &watcher{
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cond: syncutil.NewContextCond(&sync.Mutex{}),
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lastVersionedAssignment: types.VersionedStreamingNodeAssignments{
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Version: typeutil.VersionInt64Pair{Global: -1, Local: -1},
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Assignments: make(map[int64]types.StreamingNodeAssignment),
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ReplicateConfigHelper: nil,
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},
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}
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}
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// watcher is the watcher for assignment discovery.
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type watcher struct {
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cond *syncutil.ContextCond
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lastVersionedAssignment types.VersionedStreamingNodeAssignments
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}
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func (w *watcher) GetLatestStreamingVersion(ctx context.Context) (*streamingpb.StreamingVersion, error) {
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w.cond.L.Lock()
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for w.lastVersionedAssignment.Version.Global == -1 && w.lastVersionedAssignment.Version.Local == -1 {
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if err := w.cond.Wait(ctx); err != nil {
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return nil, err
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}
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}
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last := w.lastVersionedAssignment.StreamingVersion
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w.cond.L.Unlock()
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return last, nil
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}
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func (w *watcher) GetLatestDiscover(ctx context.Context) (*types.VersionedStreamingNodeAssignments, error) {
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w.cond.L.Lock()
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for w.lastVersionedAssignment.Version.Global == -1 && w.lastVersionedAssignment.Version.Local == -1 {
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if err := w.cond.Wait(ctx); err != nil {
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return nil, err
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}
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}
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last := w.lastVersionedAssignment
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w.cond.L.Unlock()
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return &last, nil
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}
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func (w *watcher) GetLatestReplicateConfiguration(ctx context.Context) (*replicateutil.ConfigHelper, error) {
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w.cond.L.Lock()
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for (w.lastVersionedAssignment.Version.Global == -1 && w.lastVersionedAssignment.Version.Local == -1) ||
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w.lastVersionedAssignment.ReplicateConfigHelper == nil {
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if err := w.cond.Wait(ctx); err != nil {
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return nil, err
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}
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}
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last := w.lastVersionedAssignment
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w.cond.L.Unlock()
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return last.ReplicateConfigHelper, nil
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}
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// AssignmentDiscover watches the assignment discovery.
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func (w *watcher) AssignmentDiscover(ctx context.Context, cb func(*types.VersionedStreamingNodeAssignments) error) error {
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w.cond.L.Lock()
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for {
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if err := cb(&w.lastVersionedAssignment); err != nil {
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w.cond.L.Unlock()
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return err
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}
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if err := w.cond.Wait(ctx); err != nil {
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return err
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}
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}
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}
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// Update updates the assignment.
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func (w *watcher) Update(assignments types.VersionedStreamingNodeAssignments) {
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w.cond.LockAndBroadcast()
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if assignments.Version.GT(w.lastVersionedAssignment.Version) {
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w.lastVersionedAssignment = assignments
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}
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w.cond.L.Unlock()
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}
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