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https://gitlab.com/pulsechaincom/erigon-pulse.git
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231e468e19
git-subtree-dir: erigon-lib git-subtree-mainline:3c8cbda809git-subtree-split:93d9c9d9fe
100 lines
2.9 KiB
Go
100 lines
2.9 KiB
Go
/*
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Copyright 2021 Erigon contributors
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package direct
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import (
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"context"
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"io"
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"github.com/ledgerwatch/erigon-lib/gointerfaces/remote"
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"google.golang.org/grpc"
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)
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type StateDiffClient interface {
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StateChanges(ctx context.Context, in *remote.StateChangeRequest, opts ...grpc.CallOption) (remote.KV_StateChangesClient, error)
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Snapshots(ctx context.Context, in *remote.SnapshotsRequest, opts ...grpc.CallOption) (*remote.SnapshotsReply, error)
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}
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var _ StateDiffClient = (*StateDiffClientDirect)(nil) // compile-time interface check
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// SentryClientDirect implements SentryClient interface by connecting the instance of the client directly with the corresponding
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// instance of SentryServer
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type StateDiffClientDirect struct {
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server remote.KVServer
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}
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func NewStateDiffClientDirect(server remote.KVServer) *StateDiffClientDirect {
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return &StateDiffClientDirect{server: server}
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}
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func (c *StateDiffClientDirect) Snapshots(ctx context.Context, in *remote.SnapshotsRequest, opts ...grpc.CallOption) (*remote.SnapshotsReply, error) {
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return c.server.Snapshots(ctx, in)
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}
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// -- start StateChanges
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func (c *StateDiffClientDirect) StateChanges(ctx context.Context, in *remote.StateChangeRequest, opts ...grpc.CallOption) (remote.KV_StateChangesClient, error) {
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ch := make(chan *stateDiffReply, 16384)
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streamServer := &StateDiffStreamS{ch: ch, ctx: ctx}
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go func() {
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defer close(ch)
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streamServer.Err(c.server.StateChanges(in, streamServer))
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}()
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return &StateDiffStreamC{ch: ch, ctx: ctx}, nil
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}
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type stateDiffReply struct {
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r *remote.StateChangeBatch
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err error
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}
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type StateDiffStreamC struct {
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ch chan *stateDiffReply
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ctx context.Context
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grpc.ClientStream
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}
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func (c *StateDiffStreamC) Recv() (*remote.StateChangeBatch, error) {
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m, ok := <-c.ch
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if !ok || m == nil {
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return nil, io.EOF
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}
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return m.r, m.err
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}
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func (c *StateDiffStreamC) Context() context.Context { return c.ctx }
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// StateDiffStreamS implements proto_sentry.Sentry_ReceiveMessagesServer
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type StateDiffStreamS struct {
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ch chan *stateDiffReply
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ctx context.Context
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grpc.ServerStream
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}
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func (s *StateDiffStreamS) Send(m *remote.StateChangeBatch) error {
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s.ch <- &stateDiffReply{r: m}
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return nil
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}
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func (s *StateDiffStreamS) Context() context.Context { return s.ctx }
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func (s *StateDiffStreamS) Err(err error) {
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if err == nil {
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return
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}
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s.ch <- &stateDiffReply{err: err}
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}
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// -- end StateChanges
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