mirror of
https://github.com/restic/restic.git
synced 2024-08-20 11:23:24 +02:00
502 lines
15 KiB
Go
502 lines
15 KiB
Go
// Copyright 2015 Google Inc. All Rights Reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package bigquery
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"time"
|
|
|
|
"cloud.google.com/go/internal/optional"
|
|
|
|
"golang.org/x/net/context"
|
|
bq "google.golang.org/api/bigquery/v2"
|
|
"google.golang.org/api/iterator"
|
|
)
|
|
|
|
// Dataset is a reference to a BigQuery dataset.
|
|
type Dataset struct {
|
|
ProjectID string
|
|
DatasetID string
|
|
c *Client
|
|
}
|
|
|
|
// DatasetMetadata contains information about a BigQuery dataset.
|
|
type DatasetMetadata struct {
|
|
// These fields can be set when creating a dataset.
|
|
Name string // The user-friendly name for this dataset.
|
|
Description string // The user-friendly description of this dataset.
|
|
Location string // The geo location of the dataset.
|
|
DefaultTableExpiration time.Duration // The default expiration time for new tables.
|
|
Labels map[string]string // User-provided labels.
|
|
Access []*AccessEntry // Access permissions.
|
|
|
|
// These fields are read-only.
|
|
CreationTime time.Time
|
|
LastModifiedTime time.Time // When the dataset or any of its tables were modified.
|
|
FullID string // The full dataset ID in the form projectID:datasetID.
|
|
|
|
// ETag is the ETag obtained when reading metadata. Pass it to Dataset.Update to
|
|
// ensure that the metadata hasn't changed since it was read.
|
|
ETag string
|
|
}
|
|
|
|
// DatasetMetadataToUpdate is used when updating a dataset's metadata.
|
|
// Only non-nil fields will be updated.
|
|
type DatasetMetadataToUpdate struct {
|
|
Description optional.String // The user-friendly description of this table.
|
|
Name optional.String // The user-friendly name for this dataset.
|
|
|
|
// DefaultTableExpiration is the the default expiration time for new tables.
|
|
// If set to time.Duration(0), new tables never expire.
|
|
DefaultTableExpiration optional.Duration
|
|
|
|
// The entire access list. It is not possible to replace individual entries.
|
|
Access []*AccessEntry
|
|
|
|
labelUpdater
|
|
}
|
|
|
|
// Dataset creates a handle to a BigQuery dataset in the client's project.
|
|
func (c *Client) Dataset(id string) *Dataset {
|
|
return c.DatasetInProject(c.projectID, id)
|
|
}
|
|
|
|
// DatasetInProject creates a handle to a BigQuery dataset in the specified project.
|
|
func (c *Client) DatasetInProject(projectID, datasetID string) *Dataset {
|
|
return &Dataset{
|
|
ProjectID: projectID,
|
|
DatasetID: datasetID,
|
|
c: c,
|
|
}
|
|
}
|
|
|
|
// Create creates a dataset in the BigQuery service. An error will be returned if the
|
|
// dataset already exists. Pass in a DatasetMetadata value to configure the dataset.
|
|
func (d *Dataset) Create(ctx context.Context, md *DatasetMetadata) error {
|
|
ds, err := md.toBQ()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
ds.DatasetReference = &bq.DatasetReference{DatasetId: d.DatasetID}
|
|
call := d.c.bqs.Datasets.Insert(d.ProjectID, ds).Context(ctx)
|
|
setClientHeader(call.Header())
|
|
_, err = call.Do()
|
|
return err
|
|
}
|
|
|
|
func (dm *DatasetMetadata) toBQ() (*bq.Dataset, error) {
|
|
ds := &bq.Dataset{}
|
|
if dm == nil {
|
|
return ds, nil
|
|
}
|
|
ds.FriendlyName = dm.Name
|
|
ds.Description = dm.Description
|
|
ds.Location = dm.Location
|
|
ds.DefaultTableExpirationMs = int64(dm.DefaultTableExpiration / time.Millisecond)
|
|
ds.Labels = dm.Labels
|
|
var err error
|
|
ds.Access, err = accessListToBQ(dm.Access)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if !dm.CreationTime.IsZero() {
|
|
return nil, errors.New("bigquery: Dataset.CreationTime is not writable")
|
|
}
|
|
if !dm.LastModifiedTime.IsZero() {
|
|
return nil, errors.New("bigquery: Dataset.LastModifiedTime is not writable")
|
|
}
|
|
if dm.FullID != "" {
|
|
return nil, errors.New("bigquery: Dataset.FullID is not writable")
|
|
}
|
|
if dm.ETag != "" {
|
|
return nil, errors.New("bigquery: Dataset.ETag is not writable")
|
|
}
|
|
return ds, nil
|
|
}
|
|
|
|
func accessListToBQ(a []*AccessEntry) ([]*bq.DatasetAccess, error) {
|
|
var q []*bq.DatasetAccess
|
|
for _, e := range a {
|
|
a, err := e.toBQ()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
q = append(q, a)
|
|
}
|
|
return q, nil
|
|
}
|
|
|
|
// Delete deletes the dataset.
|
|
func (d *Dataset) Delete(ctx context.Context) error {
|
|
call := d.c.bqs.Datasets.Delete(d.ProjectID, d.DatasetID).Context(ctx)
|
|
setClientHeader(call.Header())
|
|
return call.Do()
|
|
}
|
|
|
|
// Metadata fetches the metadata for the dataset.
|
|
func (d *Dataset) Metadata(ctx context.Context) (*DatasetMetadata, error) {
|
|
call := d.c.bqs.Datasets.Get(d.ProjectID, d.DatasetID).Context(ctx)
|
|
setClientHeader(call.Header())
|
|
var ds *bq.Dataset
|
|
if err := runWithRetry(ctx, func() (err error) {
|
|
ds, err = call.Do()
|
|
return err
|
|
}); err != nil {
|
|
return nil, err
|
|
}
|
|
return bqToDatasetMetadata(ds)
|
|
}
|
|
|
|
func bqToDatasetMetadata(d *bq.Dataset) (*DatasetMetadata, error) {
|
|
dm := &DatasetMetadata{
|
|
CreationTime: unixMillisToTime(d.CreationTime),
|
|
LastModifiedTime: unixMillisToTime(d.LastModifiedTime),
|
|
DefaultTableExpiration: time.Duration(d.DefaultTableExpirationMs) * time.Millisecond,
|
|
Description: d.Description,
|
|
Name: d.FriendlyName,
|
|
FullID: d.Id,
|
|
Location: d.Location,
|
|
Labels: d.Labels,
|
|
ETag: d.Etag,
|
|
}
|
|
for _, a := range d.Access {
|
|
e, err := bqToAccessEntry(a, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
dm.Access = append(dm.Access, e)
|
|
}
|
|
return dm, nil
|
|
}
|
|
|
|
// Update modifies specific Dataset metadata fields.
|
|
// To perform a read-modify-write that protects against intervening reads,
|
|
// set the etag argument to the DatasetMetadata.ETag field from the read.
|
|
// Pass the empty string for etag for a "blind write" that will always succeed.
|
|
func (d *Dataset) Update(ctx context.Context, dm DatasetMetadataToUpdate, etag string) (*DatasetMetadata, error) {
|
|
ds, err := dm.toBQ()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
call := d.c.bqs.Datasets.Patch(d.ProjectID, d.DatasetID, ds).Context(ctx)
|
|
setClientHeader(call.Header())
|
|
if etag != "" {
|
|
call.Header().Set("If-Match", etag)
|
|
}
|
|
var ds2 *bq.Dataset
|
|
if err := runWithRetry(ctx, func() (err error) {
|
|
ds2, err = call.Do()
|
|
return err
|
|
}); err != nil {
|
|
return nil, err
|
|
}
|
|
return bqToDatasetMetadata(ds2)
|
|
}
|
|
|
|
func (dm *DatasetMetadataToUpdate) toBQ() (*bq.Dataset, error) {
|
|
ds := &bq.Dataset{}
|
|
forceSend := func(field string) {
|
|
ds.ForceSendFields = append(ds.ForceSendFields, field)
|
|
}
|
|
|
|
if dm.Description != nil {
|
|
ds.Description = optional.ToString(dm.Description)
|
|
forceSend("Description")
|
|
}
|
|
if dm.Name != nil {
|
|
ds.FriendlyName = optional.ToString(dm.Name)
|
|
forceSend("FriendlyName")
|
|
}
|
|
if dm.DefaultTableExpiration != nil {
|
|
dur := optional.ToDuration(dm.DefaultTableExpiration)
|
|
if dur == 0 {
|
|
// Send a null to delete the field.
|
|
ds.NullFields = append(ds.NullFields, "DefaultTableExpirationMs")
|
|
} else {
|
|
ds.DefaultTableExpirationMs = int64(dur / time.Millisecond)
|
|
}
|
|
}
|
|
if dm.Access != nil {
|
|
var err error
|
|
ds.Access, err = accessListToBQ(dm.Access)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if len(ds.Access) == 0 {
|
|
ds.NullFields = append(ds.NullFields, "Access")
|
|
}
|
|
}
|
|
labels, forces, nulls := dm.update()
|
|
ds.Labels = labels
|
|
ds.ForceSendFields = append(ds.ForceSendFields, forces...)
|
|
ds.NullFields = append(ds.NullFields, nulls...)
|
|
return ds, nil
|
|
}
|
|
|
|
// Table creates a handle to a BigQuery table in the dataset.
|
|
// To determine if a table exists, call Table.Metadata.
|
|
// If the table does not already exist, use Table.Create to create it.
|
|
func (d *Dataset) Table(tableID string) *Table {
|
|
return &Table{ProjectID: d.ProjectID, DatasetID: d.DatasetID, TableID: tableID, c: d.c}
|
|
}
|
|
|
|
// Tables returns an iterator over the tables in the Dataset.
|
|
func (d *Dataset) Tables(ctx context.Context) *TableIterator {
|
|
it := &TableIterator{
|
|
ctx: ctx,
|
|
dataset: d,
|
|
}
|
|
it.pageInfo, it.nextFunc = iterator.NewPageInfo(
|
|
it.fetch,
|
|
func() int { return len(it.tables) },
|
|
func() interface{} { b := it.tables; it.tables = nil; return b })
|
|
return it
|
|
}
|
|
|
|
// A TableIterator is an iterator over Tables.
|
|
type TableIterator struct {
|
|
ctx context.Context
|
|
dataset *Dataset
|
|
tables []*Table
|
|
pageInfo *iterator.PageInfo
|
|
nextFunc func() error
|
|
}
|
|
|
|
// Next returns the next result. Its second return value is Done if there are
|
|
// no more results. Once Next returns Done, all subsequent calls will return
|
|
// Done.
|
|
func (it *TableIterator) Next() (*Table, error) {
|
|
if err := it.nextFunc(); err != nil {
|
|
return nil, err
|
|
}
|
|
t := it.tables[0]
|
|
it.tables = it.tables[1:]
|
|
return t, nil
|
|
}
|
|
|
|
// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
|
|
func (it *TableIterator) PageInfo() *iterator.PageInfo { return it.pageInfo }
|
|
|
|
// for testing
|
|
var listTables = func(it *TableIterator, pageSize int, pageToken string) (*bq.TableList, error) {
|
|
call := it.dataset.c.bqs.Tables.List(it.dataset.ProjectID, it.dataset.DatasetID).
|
|
PageToken(pageToken).
|
|
Context(it.ctx)
|
|
setClientHeader(call.Header())
|
|
if pageSize > 0 {
|
|
call.MaxResults(int64(pageSize))
|
|
}
|
|
var res *bq.TableList
|
|
err := runWithRetry(it.ctx, func() (err error) {
|
|
res, err = call.Do()
|
|
return err
|
|
})
|
|
return res, err
|
|
}
|
|
|
|
func (it *TableIterator) fetch(pageSize int, pageToken string) (string, error) {
|
|
res, err := listTables(it, pageSize, pageToken)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
for _, t := range res.Tables {
|
|
it.tables = append(it.tables, bqToTable(t.TableReference, it.dataset.c))
|
|
}
|
|
return res.NextPageToken, nil
|
|
}
|
|
|
|
func bqToTable(tr *bq.TableReference, c *Client) *Table {
|
|
return &Table{
|
|
ProjectID: tr.ProjectId,
|
|
DatasetID: tr.DatasetId,
|
|
TableID: tr.TableId,
|
|
c: c,
|
|
}
|
|
}
|
|
|
|
// Datasets returns an iterator over the datasets in a project.
|
|
// The Client's project is used by default, but that can be
|
|
// changed by setting ProjectID on the returned iterator before calling Next.
|
|
func (c *Client) Datasets(ctx context.Context) *DatasetIterator {
|
|
return c.DatasetsInProject(ctx, c.projectID)
|
|
}
|
|
|
|
// DatasetsInProject returns an iterator over the datasets in the provided project.
|
|
//
|
|
// Deprecated: call Client.Datasets, then set ProjectID on the returned iterator.
|
|
func (c *Client) DatasetsInProject(ctx context.Context, projectID string) *DatasetIterator {
|
|
it := &DatasetIterator{
|
|
ctx: ctx,
|
|
c: c,
|
|
ProjectID: projectID,
|
|
}
|
|
it.pageInfo, it.nextFunc = iterator.NewPageInfo(
|
|
it.fetch,
|
|
func() int { return len(it.items) },
|
|
func() interface{} { b := it.items; it.items = nil; return b })
|
|
return it
|
|
}
|
|
|
|
// DatasetIterator iterates over the datasets in a project.
|
|
type DatasetIterator struct {
|
|
// ListHidden causes hidden datasets to be listed when set to true.
|
|
// Set before the first call to Next.
|
|
ListHidden bool
|
|
|
|
// Filter restricts the datasets returned by label. The filter syntax is described in
|
|
// https://cloud.google.com/bigquery/docs/labeling-datasets#filtering_datasets_using_labels
|
|
// Set before the first call to Next.
|
|
Filter string
|
|
|
|
// The project ID of the listed datasets.
|
|
// Set before the first call to Next.
|
|
ProjectID string
|
|
|
|
ctx context.Context
|
|
c *Client
|
|
pageInfo *iterator.PageInfo
|
|
nextFunc func() error
|
|
items []*Dataset
|
|
}
|
|
|
|
// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
|
|
func (it *DatasetIterator) PageInfo() *iterator.PageInfo { return it.pageInfo }
|
|
|
|
func (it *DatasetIterator) Next() (*Dataset, error) {
|
|
if err := it.nextFunc(); err != nil {
|
|
return nil, err
|
|
}
|
|
item := it.items[0]
|
|
it.items = it.items[1:]
|
|
return item, nil
|
|
}
|
|
|
|
// for testing
|
|
var listDatasets = func(it *DatasetIterator, pageSize int, pageToken string) (*bq.DatasetList, error) {
|
|
call := it.c.bqs.Datasets.List(it.ProjectID).
|
|
Context(it.ctx).
|
|
PageToken(pageToken).
|
|
All(it.ListHidden)
|
|
setClientHeader(call.Header())
|
|
if pageSize > 0 {
|
|
call.MaxResults(int64(pageSize))
|
|
}
|
|
if it.Filter != "" {
|
|
call.Filter(it.Filter)
|
|
}
|
|
var res *bq.DatasetList
|
|
err := runWithRetry(it.ctx, func() (err error) {
|
|
res, err = call.Do()
|
|
return err
|
|
})
|
|
return res, err
|
|
}
|
|
|
|
func (it *DatasetIterator) fetch(pageSize int, pageToken string) (string, error) {
|
|
res, err := listDatasets(it, pageSize, pageToken)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
for _, d := range res.Datasets {
|
|
it.items = append(it.items, &Dataset{
|
|
ProjectID: d.DatasetReference.ProjectId,
|
|
DatasetID: d.DatasetReference.DatasetId,
|
|
c: it.c,
|
|
})
|
|
}
|
|
return res.NextPageToken, nil
|
|
}
|
|
|
|
// An AccessEntry describes the permissions that an entity has on a dataset.
|
|
type AccessEntry struct {
|
|
Role AccessRole // The role of the entity
|
|
EntityType EntityType // The type of entity
|
|
Entity string // The entity (individual or group) granted access
|
|
View *Table // The view granted access (EntityType must be ViewEntity)
|
|
}
|
|
|
|
// AccessRole is the level of access to grant to a dataset.
|
|
type AccessRole string
|
|
|
|
const (
|
|
OwnerRole AccessRole = "OWNER"
|
|
ReaderRole AccessRole = "READER"
|
|
WriterRole AccessRole = "WRITER"
|
|
)
|
|
|
|
// EntityType is the type of entity in an AccessEntry.
|
|
type EntityType int
|
|
|
|
const (
|
|
// A domain (e.g. "example.com")
|
|
DomainEntity EntityType = iota + 1
|
|
|
|
// Email address of a Google Group
|
|
GroupEmailEntity
|
|
|
|
// Email address of an individual user.
|
|
UserEmailEntity
|
|
|
|
// A special group: one of projectOwners, projectReaders, projectWriters or allAuthenticatedUsers.
|
|
SpecialGroupEntity
|
|
|
|
// A BigQuery view.
|
|
ViewEntity
|
|
)
|
|
|
|
func (e *AccessEntry) toBQ() (*bq.DatasetAccess, error) {
|
|
q := &bq.DatasetAccess{Role: string(e.Role)}
|
|
switch e.EntityType {
|
|
case DomainEntity:
|
|
q.Domain = e.Entity
|
|
case GroupEmailEntity:
|
|
q.GroupByEmail = e.Entity
|
|
case UserEmailEntity:
|
|
q.UserByEmail = e.Entity
|
|
case SpecialGroupEntity:
|
|
q.SpecialGroup = e.Entity
|
|
case ViewEntity:
|
|
q.View = e.View.toBQ()
|
|
default:
|
|
return nil, fmt.Errorf("bigquery: unknown entity type %d", e.EntityType)
|
|
}
|
|
return q, nil
|
|
}
|
|
|
|
func bqToAccessEntry(q *bq.DatasetAccess, c *Client) (*AccessEntry, error) {
|
|
e := &AccessEntry{Role: AccessRole(q.Role)}
|
|
switch {
|
|
case q.Domain != "":
|
|
e.Entity = q.Domain
|
|
e.EntityType = DomainEntity
|
|
case q.GroupByEmail != "":
|
|
e.Entity = q.GroupByEmail
|
|
e.EntityType = GroupEmailEntity
|
|
case q.UserByEmail != "":
|
|
e.Entity = q.UserByEmail
|
|
e.EntityType = UserEmailEntity
|
|
case q.SpecialGroup != "":
|
|
e.Entity = q.SpecialGroup
|
|
e.EntityType = SpecialGroupEntity
|
|
case q.View != nil:
|
|
e.View = c.DatasetInProject(q.View.ProjectId, q.View.DatasetId).Table(q.View.TableId)
|
|
e.EntityType = ViewEntity
|
|
default:
|
|
return nil, errors.New("bigquery: invalid access value")
|
|
}
|
|
return e, nil
|
|
}
|