mirror of
https://github.com/gravitational/teleport.git
synced 2026-10-29 17:58:15 +08:00
Andrey Bulgakov
ad80fa3e17
* Partial cache healthiness * IsSupersetOf -> Contains * NewWatchStatus fixes * make map[kindSubKind]types.WatchKind with capacity * fixed TestRootNetwork? * post-rebase fix * fixes regarding docs/comments * const noSubKind = "" * preallocate slices for validKinds * DisablePartialHealth * test fixes * fixed struct logging field name * use custom identity in TestEventsPermissionsPartialSuccess * fixed TestNodeCAFiltering * don't look at versions in events APIs * RFD state: implemented
113 lines
2.5 KiB
Go
113 lines
2.5 KiB
Go
/*
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Copyright 2020 Gravitational, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package client
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import (
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"context"
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"sync"
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"github.com/gravitational/trace"
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"github.com/gravitational/trace/trail"
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"github.com/gravitational/teleport/api/client/proto"
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"github.com/gravitational/teleport/api/types"
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)
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// NewWatcher returns a new streamWatcher
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func (c *Client) NewWatcher(ctx context.Context, watch types.Watch) (types.Watcher, error) {
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cancelCtx, cancel := context.WithCancel(ctx)
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protoWatch := proto.Watch{
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Kinds: watch.Kinds,
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AllowPartialSuccess: watch.AllowPartialSuccess,
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}
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stream, err := c.grpc.WatchEvents(cancelCtx, &protoWatch)
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if err != nil {
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cancel()
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return nil, trail.FromGRPC(err)
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}
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w := &streamWatcher{
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stream: stream,
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ctx: cancelCtx,
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cancel: cancel,
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eventsC: make(chan types.Event),
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}
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go w.receiveEvents()
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return w, nil
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}
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type streamWatcher struct {
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mu sync.RWMutex
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stream proto.AuthService_WatchEventsClient
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ctx context.Context
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cancel context.CancelFunc
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eventsC chan types.Event
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err error
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}
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// Error returns the streamWatcher's error
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func (w *streamWatcher) Error() error {
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w.mu.RLock()
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defer w.mu.RUnlock()
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if w.err == nil {
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return trace.Wrap(w.ctx.Err())
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}
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return w.err
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}
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func (w *streamWatcher) closeWithError(err error) {
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w.mu.Lock()
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defer w.mu.Unlock()
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w.Close()
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w.err = err
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}
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// Events returns the streamWatcher's events channel
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func (w *streamWatcher) Events() <-chan types.Event {
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return w.eventsC
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}
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func (w *streamWatcher) receiveEvents() {
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for {
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event, err := w.stream.Recv()
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if err != nil {
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w.closeWithError(trail.FromGRPC(err))
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return
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}
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out, err := EventFromGRPC(*event)
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if err != nil {
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w.closeWithError(trail.FromGRPC(err))
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return
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}
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select {
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case w.eventsC <- *out:
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case <-w.Done():
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return
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}
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}
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}
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// Done returns a channel that closes once the streamWatcher is Closed
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func (w *streamWatcher) Done() <-chan struct{} {
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return w.ctx.Done()
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}
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// Close the streamWatcher
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func (w *streamWatcher) Close() error {
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w.cancel()
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return nil
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}
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