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refactor multiprovider

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This commit is contained in:
Anton Kaliaev 2019-08-15 12:09:38 +04:00
parent 46c3d0baec
commit f9061f11e6
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GPG Key ID: 7B6881D965918214
1 changed files with 13 additions and 12 deletions
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25
lite/multiprovider.go
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@ -6,17 +6,15 @@ import (
"github.com/tendermint/tendermint/types"
)
var _ PersistentProvider = (*multiProvider)(nil)
// multiProvider allows you to place one or more caches in front of a source
// Provider. It runs through them in order until a match is found.
// Provider. It runs through them in order until a match is found.
type multiProvider struct {
logger log.Logger
providers []PersistentProvider
}
// NewMultiProvider returns a new provider which wraps multiple other providers.
func NewMultiProvider(providers ...PersistentProvider) *multiProvider {
func NewMultiProvider(providers ...PersistentProvider) PersistentProvider {
return &multiProvider{
logger: log.NewNopLogger(),
providers: providers,
@ -47,8 +45,8 @@ func (mc *multiProvider) SaveFullCommit(fc FullCommit) (err error) {
// Returns the first error encountered.
func (mc *multiProvider) LatestFullCommit(chainID string, minHeight, maxHeight int64) (fc FullCommit, err error) {
for _, p := range mc.providers {
var fc_ FullCommit
fc_, err = p.LatestFullCommit(chainID, minHeight, maxHeight)
var pfc FullCommit
pfc, err = p.LatestFullCommit(chainID, minHeight, maxHeight)
if lerr.IsErrCommitNotFound(err) {
err = nil
continue
@ -56,18 +54,20 @@ func (mc *multiProvider) LatestFullCommit(chainID string, minHeight, maxHeight i
return
}
if fc == (FullCommit{}) {
fc = fc_
} else if fc_.Height() > fc.Height() {
fc = fc_
fc = pfc
} else if pfc.Height() > fc.Height() {
fc = pfc
}
if fc.Height() == maxHeight {
return
}
}
if fc == (FullCommit{}) {
err = lerr.ErrCommitNotFound()
return
}
return
}
@ -76,10 +76,11 @@ func (mc *multiProvider) LatestFullCommit(chainID string, minHeight, maxHeight i
func (mc *multiProvider) ValidatorSet(chainID string, height int64) (valset *types.ValidatorSet, err error) {
for _, p := range mc.providers {
valset, err = p.ValidatorSet(chainID, height)
if err == nil {
// TODO Log unexpected types of errors.
return valset, nil
if lerr.IsErrUnknownValidators(err) {
err = nil
continue
}
return
}
return nil, lerr.ErrUnknownValidators(chainID, height)
}