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c3fe6473b8
issue: #45640 - log may be dropped if the underlying file system is busy. - use async write syncer to avoid the log operation block the milvus major system. - remove some log dependency from the until function to avoid dependency-loop. --------- Signed-off-by: chyezh <chyezh@outlook.com>
65 lines
1.8 KiB
Go
65 lines
1.8 KiB
Go
package resolver
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import (
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"github.com/cockroachdb/errors"
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"go.uber.org/zap"
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"google.golang.org/grpc/resolver"
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"github.com/milvus-io/milvus/pkg/v2/log"
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"github.com/milvus-io/milvus/pkg/v2/util/typeutil"
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)
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var _ resolver.Resolver = (*watchBasedGRPCResolver)(nil)
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// newWatchBasedGRPCResolver creates a new watch based grpc resolver.
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func newWatchBasedGRPCResolver(cc resolver.ClientConn) *watchBasedGRPCResolver {
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return &watchBasedGRPCResolver{
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lifetime: typeutil.NewLifetime(),
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cc: cc,
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}
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}
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// watchBasedGRPCResolver is a watch based grpc resolver.
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type watchBasedGRPCResolver struct {
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lifetime *typeutil.Lifetime
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cc resolver.ClientConn
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log.Binder
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}
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// ResolveNow will be called by gRPC to try to resolve the target name
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// again. It's just a hint, resolver can ignore this if it's not necessary.
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//
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// It could be called multiple times concurrently.
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func (r *watchBasedGRPCResolver) ResolveNow(_ resolver.ResolveNowOptions) {
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}
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// Close closes the resolver.
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// Do nothing.
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func (r *watchBasedGRPCResolver) Close() {
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r.lifetime.SetState(typeutil.LifetimeStateStopped)
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r.lifetime.Wait()
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}
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// Update updates the state of the resolver.
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// Return error if the resolver is closed.
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func (r *watchBasedGRPCResolver) Update(state VersionedState) error {
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if !r.lifetime.Add(typeutil.LifetimeStateWorking) {
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return errors.New("resolver is closed")
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}
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defer r.lifetime.Done()
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if err := r.cc.UpdateState(state.State); err != nil {
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// watch based resolver could ignore the error, just log and return nil
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r.Logger().Warn("fail to update resolver state", zap.Stringer("state", state), zap.Error(err))
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return nil
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}
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r.Logger().Info("update resolver state success", zap.Stringer("state", state))
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return nil
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}
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// State returns the state of the resolver.
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func (r *watchBasedGRPCResolver) State() typeutil.LifetimeState {
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return r.lifetime.GetState()
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}
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