frostfs-node/pkg/services/tree/redirect.go

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package tree
import (
"bytes"
"context"
"errors"
netmapSDK "github.com/TrueCloudLab/frostfs-sdk-go/netmap"
"go.uber.org/zap"
)
var errNoSuitableNode = errors.New("no node was found to execute the request")
// forEachNode executes callback for each node in the container until true is returned.
// Returns errNoSuitableNode if there was no successful attempt to dial any node.
func (s *Service) forEachNode(ctx context.Context, cntNodes []netmapSDK.NodeInfo, f func(c TreeServiceClient) bool) error {
for _, n := range cntNodes {
if bytes.Equal(n.PublicKey(), s.rawPub) {
return nil
}
}
var called bool
for _, n := range cntNodes {
var stop bool
n.IterateNetworkEndpoints(func(endpoint string) bool {
c, err := s.cache.get(ctx, endpoint)
if err != nil {
return false
}
s.log.Debug("redirecting tree service query", zap.String("endpoint", endpoint))
called = true
stop = f(c)
return true
})
if stop {
return nil
}
}
if !called {
return errNoSuitableNode
}
return nil
}