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cmasone-attic
65edbaabe3
The Dataset.Commit() code pathway still enforces fast-forward-only behavior, but a new SetHead() method allows the HEAD of a Dataset to be forced to any other Commit. noms sync detects the case where the source Commit is not a descendent of the provided sink Dataset's HEAD and uses the new API to force the sink to the desired new Commit, printing out the now-abandoned old HEAD. Fixes #2240
65 lines
2.1 KiB
Go
65 lines
2.1 KiB
Go
// Copyright 2016 Attic Labs, Inc. All rights reserved.
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// Licensed under the Apache License, version 2.0:
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// http://www.apache.org/licenses/LICENSE-2.0
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package datas
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import (
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"github.com/attic-labs/noms/go/d"
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"github.com/attic-labs/noms/go/types"
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"github.com/julienschmidt/httprouter"
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)
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// Database provides versioned storage for noms values. Each Database instance represents one moment in history. Heads() returns the Commit from each active fork at that moment. The Commit() method returns a new Database, representing a new moment in history.
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type RemoteDatabaseClient struct {
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databaseCommon
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}
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func NewRemoteDatabase(baseURL, auth string) *RemoteDatabaseClient {
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httpBS := newHTTPBatchStore(baseURL, auth)
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return &RemoteDatabaseClient{newDatabaseCommon(newCachingChunkHaver(httpBS), types.NewValueStore(httpBS), httpBS)}
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}
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func (rds *RemoteDatabaseClient) validatingBatchStore() (bs types.BatchStore) {
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bs = rds.vs.BatchStore()
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d.Chk.True(bs.IsValidating())
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return
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}
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func (rds *RemoteDatabaseClient) Commit(datasetID string, commit types.Struct) (Database, error) {
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err := rds.doCommit(datasetID, commit)
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return &RemoteDatabaseClient{newDatabaseCommon(rds.cch, rds.vs, rds.rt)}, err
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}
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func (rds *RemoteDatabaseClient) Delete(datasetID string) (Database, error) {
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err := rds.doDelete(datasetID)
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return &RemoteDatabaseClient{newDatabaseCommon(rds.cch, rds.vs, rds.rt)}, err
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}
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func (rds *RemoteDatabaseClient) SetHead(datasetID string, commit types.Struct) (Database, error) {
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err := rds.doSetHead(datasetID, commit)
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return &RemoteDatabaseClient{newDatabaseCommon(rds.cch, rds.vs, rds.rt)}, err
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}
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func (f RemoteStoreFactory) CreateStore(ns string) Database {
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return NewRemoteDatabase(f.host+httprouter.CleanPath(ns), f.auth)
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}
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func (f RemoteStoreFactory) Create(ns string) (Database, bool) {
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if ds := f.CreateStore(ns); ds != nil {
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return ds, true
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}
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return &LocalDatabase{}, false
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}
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func (f RemoteStoreFactory) Shutter() {}
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func NewRemoteStoreFactory(host, auth string) Factory {
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return RemoteStoreFactory{host: host, auth: auth}
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}
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type RemoteStoreFactory struct {
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host string
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auth string
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}
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