forked from hyperledger/fabric-sdk-go
/
discoveryfilter.go
49 lines (39 loc) · 1.18 KB
/
discoveryfilter.go
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/*
Copyright SecureKey Technologies Inc. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package discovery
import (
"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/fab"
)
// filterService implements discovery service
type filterService struct {
discoveryService fab.DiscoveryService
targetFilter fab.TargetFilter
}
// NewDiscoveryFilterService return discovery service with filter
func NewDiscoveryFilterService(discoveryService fab.DiscoveryService, targetFilter fab.TargetFilter) fab.DiscoveryService {
return &filterService{discoveryService: discoveryService, targetFilter: targetFilter}
}
// GetPeers is used to get peers
func (fs *filterService) GetPeers() ([]fab.Peer, error) {
peers, err := fs.discoveryService.GetPeers()
if err != nil {
return nil, err
}
targets := filterTargets(peers, fs.targetFilter)
return targets, nil
}
// filterTargets is helper method to filter peers
func filterTargets(peers []fab.Peer, filter fab.TargetFilter) []fab.Peer {
if filter == nil {
return peers
}
filteredPeers := []fab.Peer{}
for _, peer := range peers {
if filter.Accept(peer) {
filteredPeers = append(filteredPeers, peer)
}
}
return filteredPeers
}