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fallback.go
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fallback.go
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/*
Copyright 2017 Google Inc.
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 services
import (
"golang.org/x/net/context"
"vitess.io/vitess/go/sqltypes"
"vitess.io/vitess/go/vt/vtgate/vtgateservice"
querypb "vitess.io/vitess/go/vt/proto/query"
topodatapb "vitess.io/vitess/go/vt/proto/topodata"
vtgatepb "vitess.io/vitess/go/vt/proto/vtgate"
)
// fallbackClient implements vtgateservice.VTGateService, and always passes
// through to its fallback service. This is useful to embed into other clients
// so the fallback behavior doesn't have to be explicitly implemented in each
// one.
type fallbackClient struct {
fallback vtgateservice.VTGateService
}
func newFallbackClient(fallback vtgateservice.VTGateService) fallbackClient {
return fallbackClient{fallback: fallback}
}
func (c fallbackClient) Execute(ctx context.Context, session *vtgatepb.Session, sql string, bindVariables map[string]*querypb.BindVariable) (*vtgatepb.Session, *sqltypes.Result, error) {
return c.fallback.Execute(ctx, session, sql, bindVariables)
}
func (c fallbackClient) ExecuteBatch(ctx context.Context, session *vtgatepb.Session, sqlList []string, bindVariablesList []map[string]*querypb.BindVariable) (*vtgatepb.Session, []sqltypes.QueryResponse, error) {
return c.fallback.ExecuteBatch(ctx, session, sqlList, bindVariablesList)
}
func (c fallbackClient) StreamExecute(ctx context.Context, session *vtgatepb.Session, sql string, bindVariables map[string]*querypb.BindVariable, callback func(*sqltypes.Result) error) error {
return c.fallback.StreamExecute(ctx, session, sql, bindVariables, callback)
}
func (c fallbackClient) ExecuteShards(ctx context.Context, sql string, bindVariables map[string]*querypb.BindVariable, keyspace string, shards []string, tabletType topodatapb.TabletType, session *vtgatepb.Session, notInTransaction bool, options *querypb.ExecuteOptions) (*sqltypes.Result, error) {
return c.fallback.ExecuteShards(ctx, sql, bindVariables, keyspace, shards, tabletType, session, notInTransaction, options)
}
func (c fallbackClient) ExecuteKeyspaceIds(ctx context.Context, sql string, bindVariables map[string]*querypb.BindVariable, keyspace string, keyspaceIds [][]byte, tabletType topodatapb.TabletType, session *vtgatepb.Session, notInTransaction bool, options *querypb.ExecuteOptions) (*sqltypes.Result, error) {
return c.fallback.ExecuteKeyspaceIds(ctx, sql, bindVariables, keyspace, keyspaceIds, tabletType, session, notInTransaction, options)
}
func (c fallbackClient) ExecuteKeyRanges(ctx context.Context, sql string, bindVariables map[string]*querypb.BindVariable, keyspace string, keyRanges []*topodatapb.KeyRange, tabletType topodatapb.TabletType, session *vtgatepb.Session, notInTransaction bool, options *querypb.ExecuteOptions) (*sqltypes.Result, error) {
return c.fallback.ExecuteKeyRanges(ctx, sql, bindVariables, keyspace, keyRanges, tabletType, session, notInTransaction, options)
}
func (c fallbackClient) ExecuteEntityIds(ctx context.Context, sql string, bindVariables map[string]*querypb.BindVariable, keyspace string, entityColumnName string, entityKeyspaceIDs []*vtgatepb.ExecuteEntityIdsRequest_EntityId, tabletType topodatapb.TabletType, session *vtgatepb.Session, notInTransaction bool, options *querypb.ExecuteOptions) (*sqltypes.Result, error) {
return c.fallback.ExecuteEntityIds(ctx, sql, bindVariables, keyspace, entityColumnName, entityKeyspaceIDs, tabletType, session, notInTransaction, options)
}
func (c fallbackClient) ExecuteBatchShards(ctx context.Context, queries []*vtgatepb.BoundShardQuery, tabletType topodatapb.TabletType, asTransaction bool, session *vtgatepb.Session, options *querypb.ExecuteOptions) ([]sqltypes.Result, error) {
return c.fallback.ExecuteBatchShards(ctx, queries, tabletType, asTransaction, session, options)
}
func (c fallbackClient) ExecuteBatchKeyspaceIds(ctx context.Context, queries []*vtgatepb.BoundKeyspaceIdQuery, tabletType topodatapb.TabletType, asTransaction bool, session *vtgatepb.Session, options *querypb.ExecuteOptions) ([]sqltypes.Result, error) {
return c.fallback.ExecuteBatchKeyspaceIds(ctx, queries, tabletType, asTransaction, session, options)
}
func (c fallbackClient) StreamExecuteShards(ctx context.Context, sql string, bindVariables map[string]*querypb.BindVariable, keyspace string, shards []string, tabletType topodatapb.TabletType, options *querypb.ExecuteOptions, callback func(*sqltypes.Result) error) error {
return c.fallback.StreamExecuteShards(ctx, sql, bindVariables, keyspace, shards, tabletType, options, callback)
}
func (c fallbackClient) StreamExecuteKeyspaceIds(ctx context.Context, sql string, bindVariables map[string]*querypb.BindVariable, keyspace string, keyspaceIds [][]byte, tabletType topodatapb.TabletType, options *querypb.ExecuteOptions, callback func(*sqltypes.Result) error) error {
return c.fallback.StreamExecuteKeyspaceIds(ctx, sql, bindVariables, keyspace, keyspaceIds, tabletType, options, callback)
}
func (c fallbackClient) StreamExecuteKeyRanges(ctx context.Context, sql string, bindVariables map[string]*querypb.BindVariable, keyspace string, keyRanges []*topodatapb.KeyRange, tabletType topodatapb.TabletType, options *querypb.ExecuteOptions, callback func(*sqltypes.Result) error) error {
return c.fallback.StreamExecuteKeyRanges(ctx, sql, bindVariables, keyspace, keyRanges, tabletType, options, callback)
}
func (c fallbackClient) Begin(ctx context.Context, singledb bool) (*vtgatepb.Session, error) {
return c.fallback.Begin(ctx, singledb)
}
func (c fallbackClient) Commit(ctx context.Context, twopc bool, session *vtgatepb.Session) error {
return c.fallback.Commit(ctx, twopc, session)
}
func (c fallbackClient) Rollback(ctx context.Context, session *vtgatepb.Session) error {
return c.fallback.Rollback(ctx, session)
}
func (c fallbackClient) ResolveTransaction(ctx context.Context, dtid string) error {
return c.fallback.ResolveTransaction(ctx, dtid)
}
func (c fallbackClient) MessageStream(ctx context.Context, keyspace string, shard string, keyRange *topodatapb.KeyRange, name string, callback func(*sqltypes.Result) error) error {
return c.fallback.MessageStream(ctx, keyspace, shard, keyRange, name, callback)
}
func (c fallbackClient) MessageAck(ctx context.Context, keyspace string, name string, ids []*querypb.Value) (int64, error) {
return c.fallback.MessageAck(ctx, keyspace, name, ids)
}
func (c fallbackClient) MessageAckKeyspaceIds(ctx context.Context, keyspace string, name string, idKeyspaceIDs []*vtgatepb.IdKeyspaceId) (int64, error) {
return c.fallback.MessageAckKeyspaceIds(ctx, keyspace, name, idKeyspaceIDs)
}
func (c fallbackClient) SplitQuery(
ctx context.Context,
keyspace string,
sql string,
bindVariables map[string]*querypb.BindVariable,
splitColumns []string,
splitCount int64,
numRowsPerQueryPart int64,
algorithm querypb.SplitQueryRequest_Algorithm,
) ([]*vtgatepb.SplitQueryResponse_Part, error) {
return c.fallback.SplitQuery(
ctx, sql, keyspace, bindVariables, splitColumns, splitCount, numRowsPerQueryPart, algorithm)
}
func (c fallbackClient) GetSrvKeyspace(ctx context.Context, keyspace string) (*topodatapb.SrvKeyspace, error) {
return c.fallback.GetSrvKeyspace(ctx, keyspace)
}
func (c fallbackClient) UpdateStream(ctx context.Context, keyspace string, shard string, keyRange *topodatapb.KeyRange, tabletType topodatapb.TabletType, timestamp int64, event *querypb.EventToken, callback func(*querypb.StreamEvent, int64) error) error {
return c.fallback.UpdateStream(ctx, keyspace, shard, keyRange, tabletType, timestamp, event, callback)
}
func (c fallbackClient) HandlePanic(err *error) {
c.fallback.HandlePanic(err)
}