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https://github.com/etcd-io/etcd.git
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3866e78c26
All outstanding goroutines now go into the etcdserver waitgroup. goroutines are shutdown with a "stopping" channel which is closed when the run() goroutine shutsdown. The done channel will only close once the waitgroup is totally cleared.
126 lines
3.6 KiB
Go
126 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 etcdserver
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import (
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"time"
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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 v2API interface {
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Post(ctx context.Context, r *pb.Request) (Response, error)
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Put(ctx context.Context, r *pb.Request) (Response, error)
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Delete(ctx context.Context, r *pb.Request) (Response, error)
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QGet(ctx context.Context, r *pb.Request) (Response, error)
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Get(ctx context.Context, r *pb.Request) (Response, error)
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Head(ctx context.Context, r *pb.Request) (Response, error)
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}
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type v2apiStore struct{ s *EtcdServer }
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func (a *v2apiStore) Post(ctx context.Context, r *pb.Request) (Response, error) {
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return a.processRaftRequest(ctx, r)
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}
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func (a *v2apiStore) Put(ctx context.Context, r *pb.Request) (Response, error) {
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return a.processRaftRequest(ctx, r)
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}
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func (a *v2apiStore) Delete(ctx context.Context, r *pb.Request) (Response, error) {
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return a.processRaftRequest(ctx, r)
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}
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func (a *v2apiStore) QGet(ctx context.Context, r *pb.Request) (Response, error) {
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return a.processRaftRequest(ctx, r)
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}
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func (a *v2apiStore) processRaftRequest(ctx context.Context, r *pb.Request) (Response, error) {
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data, err := r.Marshal()
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if err != nil {
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return Response{}, err
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}
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ch := a.s.w.Register(r.ID)
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start := time.Now()
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a.s.r.Propose(ctx, data)
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proposalsPending.Inc()
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defer proposalsPending.Dec()
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select {
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case x := <-ch:
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resp := x.(Response)
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return resp, resp.err
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case <-ctx.Done():
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proposalsFailed.Inc()
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a.s.w.Trigger(r.ID, nil) // GC wait
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return Response{}, a.s.parseProposeCtxErr(ctx.Err(), start)
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case <-a.s.stopping:
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}
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return Response{}, ErrStopped
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}
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func (a *v2apiStore) Get(ctx context.Context, r *pb.Request) (Response, error) {
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if r.Wait {
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wc, err := a.s.store.Watch(r.Path, r.Recursive, r.Stream, r.Since)
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if err != nil {
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return Response{}, err
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}
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return Response{Watcher: wc}, nil
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}
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ev, err := a.s.store.Get(r.Path, r.Recursive, r.Sorted)
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if err != nil {
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return Response{}, err
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}
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return Response{Event: ev}, nil
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}
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func (a *v2apiStore) Head(ctx context.Context, r *pb.Request) (Response, error) {
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ev, err := a.s.store.Get(r.Path, r.Recursive, r.Sorted)
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if err != nil {
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return Response{}, err
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}
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return Response{Event: ev}, nil
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}
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// Do interprets r and performs an operation on s.store according to r.Method
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// and other fields. If r.Method is "POST", "PUT", "DELETE", or a "GET" with
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// Quorum == true, r will be sent through consensus before performing its
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// respective operation. Do will block until an action is performed or there is
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// an error.
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func (s *EtcdServer) Do(ctx context.Context, r pb.Request) (Response, error) {
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r.ID = s.reqIDGen.Next()
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if r.Method == "GET" && r.Quorum {
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r.Method = "QGET"
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}
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v2api := (v2API)(&v2apiStore{s})
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switch r.Method {
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case "POST":
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return v2api.Post(ctx, &r)
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case "PUT":
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return v2api.Put(ctx, &r)
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case "DELETE":
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return v2api.Delete(ctx, &r)
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case "QGET":
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return v2api.QGet(ctx, &r)
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case "GET":
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return v2api.Get(ctx, &r)
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case "HEAD":
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return v2api.Head(ctx, &r)
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}
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return Response{}, ErrUnknownMethod
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}
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