83 lines
2.0 KiB
Go
83 lines
2.0 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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"golang.org/x/net/context"
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"github.com/coreos/etcd/clientv3"
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pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
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)
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type leaseProxy struct {
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client *clientv3.Client
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}
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func NewLeaseProxy(c *clientv3.Client) pb.LeaseServer {
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return &leaseProxy{
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client: c,
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}
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}
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func (lp *leaseProxy) LeaseGrant(ctx context.Context, cr *pb.LeaseGrantRequest) (*pb.LeaseGrantResponse, error) {
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conn := lp.client.ActiveConnection()
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return pb.NewLeaseClient(conn).LeaseGrant(ctx, cr)
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}
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func (lp *leaseProxy) LeaseRevoke(ctx context.Context, rr *pb.LeaseRevokeRequest) (*pb.LeaseRevokeResponse, error) {
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conn := lp.client.ActiveConnection()
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return pb.NewLeaseClient(conn).LeaseRevoke(ctx, rr)
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}
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func (lp *leaseProxy) LeaseKeepAlive(stream pb.Lease_LeaseKeepAliveServer) error {
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conn := lp.client.ActiveConnection()
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ctx, cancel := context.WithCancel(stream.Context())
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lc, err := pb.NewLeaseClient(conn).LeaseKeepAlive(ctx)
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if err != nil {
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cancel()
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return err
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}
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go func() {
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// Cancel the context attached to lc to unblock lc.Recv when
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// this routine returns on error.
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defer cancel()
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for {
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// stream.Recv will be unblock when the loop in the parent routine
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// returns on error.
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rr, err := stream.Recv()
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if err != nil {
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return
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}
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err = lc.Send(rr)
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if err != nil {
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return
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}
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}
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}()
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for {
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rr, err := lc.Recv()
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if err != nil {
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return err
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}
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err = stream.Send(rr)
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if err != nil {
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return err
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}
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}
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}
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