131 lines
3.6 KiB
Go
131 lines
3.6 KiB
Go
// Copyright 2016 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package grpcproxy
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import (
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"github.com/coreos/etcd/clientv3"
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pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
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"golang.org/x/net/context"
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)
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type kvProxy struct {
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c *clientv3.Client
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}
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func NewKvProxy(c *clientv3.Client) *kvProxy {
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return &kvProxy{
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c: c,
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}
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}
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func (p *kvProxy) Range(ctx context.Context, r *pb.RangeRequest) (*pb.RangeResponse, error) {
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resp, err := p.c.Do(ctx, RangeRequestToOp(r))
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return (*pb.RangeResponse)(resp.Get()), err
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}
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func (p *kvProxy) Put(ctx context.Context, r *pb.PutRequest) (*pb.PutResponse, error) {
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resp, err := p.c.Do(ctx, PutRequestToOp(r))
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return (*pb.PutResponse)(resp.Put()), err
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}
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func (p *kvProxy) DeleteRange(ctx context.Context, r *pb.DeleteRangeRequest) (*pb.DeleteRangeResponse, error) {
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resp, err := p.c.Do(ctx, DelRequestToOp(r))
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return (*pb.DeleteRangeResponse)(resp.Del()), err
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}
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func (p *kvProxy) Txn(ctx context.Context, r *pb.TxnRequest) (*pb.TxnResponse, error) {
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txn := p.c.Txn(ctx)
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cmps := make([]clientv3.Cmp, len(r.Compare))
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thenops := make([]clientv3.Op, len(r.Success))
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elseops := make([]clientv3.Op, len(r.Failure))
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for i := range r.Compare {
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cmps[i] = (clientv3.Cmp)(*r.Compare[i])
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}
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for i := range r.Success {
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thenops[i] = requestUnionToOp(r.Success[i])
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}
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for i := range r.Failure {
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elseops[i] = requestUnionToOp(r.Failure[i])
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}
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resp, err := txn.If(cmps...).Then(thenops...).Else(elseops...).Commit()
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return (*pb.TxnResponse)(resp), err
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}
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func (p *kvProxy) Close() error {
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return p.c.Close()
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}
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func requestUnionToOp(union *pb.RequestUnion) clientv3.Op {
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switch tv := union.Request.(type) {
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case *pb.RequestUnion_RequestRange:
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if tv.RequestRange != nil {
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return RangeRequestToOp(tv.RequestRange)
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}
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case *pb.RequestUnion_RequestPut:
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if tv.RequestPut != nil {
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return PutRequestToOp(tv.RequestPut)
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}
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case *pb.RequestUnion_RequestDeleteRange:
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if tv.RequestDeleteRange != nil {
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return DelRequestToOp(tv.RequestDeleteRange)
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}
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}
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panic("unknown request")
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}
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func RangeRequestToOp(r *pb.RangeRequest) clientv3.Op {
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opts := []clientv3.OpOption{}
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if len(r.RangeEnd) != 0 {
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opts = append(opts, clientv3.WithRange(string(r.RangeEnd)))
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}
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opts = append(opts, clientv3.WithRev(r.Revision))
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opts = append(opts, clientv3.WithLimit(r.Limit))
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opts = append(opts, clientv3.WithSort(
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clientv3.SortTarget(r.SortTarget),
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clientv3.SortOrder(r.SortOrder)),
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)
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if r.Serializable {
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opts = append(opts, clientv3.WithSerializable())
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}
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return clientv3.OpGet(string(r.Key), opts...)
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}
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func PutRequestToOp(r *pb.PutRequest) clientv3.Op {
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opts := []clientv3.OpOption{}
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opts = append(opts, clientv3.WithLease(clientv3.LeaseID(r.Lease)))
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return clientv3.OpPut(string(r.Key), string(r.Value), opts...)
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}
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func DelRequestToOp(r *pb.DeleteRangeRequest) clientv3.Op {
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opts := []clientv3.OpOption{}
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if len(r.RangeEnd) != 0 {
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opts = append(opts, clientv3.WithRange(string(r.RangeEnd)))
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}
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return clientv3.OpDelete(string(r.Key), opts...)
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}
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func (p *kvProxy) Compact(ctx context.Context, r *pb.CompactionRequest) (*pb.CompactionResponse, error) {
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panic("unimplemented")
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}
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