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b414800d49
* update Seek Signed-off-by: yudong.cai <yudong.cai@zilliz.com> * update Seek for mqTtMsgStream Signed-off-by: yudong.cai <yudong.cai@zilliz.com> * use Retry in Seek Signed-off-by: yudong.cai <yudong.cai@zilliz.com> * fix static-check Signed-off-by: yudong.cai <yudong.cai@zilliz.com>
126 lines
2.8 KiB
Go
126 lines
2.8 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. 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 distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package msgstream
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import (
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"context"
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"sync"
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)
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type SimpleMsgStream struct {
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msgChan chan *MsgPack
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msgCount int
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msgCountMtx sync.RWMutex
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}
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func (ms *SimpleMsgStream) Start() {
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}
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func (ms *SimpleMsgStream) Close() {
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}
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func (ms *SimpleMsgStream) Chan() <-chan *MsgPack {
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return ms.msgChan
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}
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func (ms *SimpleMsgStream) AsProducer(channels []string) {
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}
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func (ms *SimpleMsgStream) AsConsumer(channels []string, subName string) {
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}
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func (ms *SimpleMsgStream) ComputeProduceChannelIndexes(tsMsgs []TsMsg) [][]int32 {
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return nil
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}
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func (ms *SimpleMsgStream) SetRepackFunc(repackFunc RepackFunc) {
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}
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func (ms *SimpleMsgStream) getMsgCount() int {
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ms.msgCountMtx.RLock()
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defer ms.msgCountMtx.RUnlock()
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return ms.msgCount
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}
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func (ms *SimpleMsgStream) increaseMsgCount(delta int) {
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ms.msgCountMtx.Lock()
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defer ms.msgCountMtx.Unlock()
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ms.msgCount += delta
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}
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func (ms *SimpleMsgStream) decreaseMsgCount(delta int) {
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ms.increaseMsgCount(-delta)
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}
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func (ms *SimpleMsgStream) Produce(pack *MsgPack) error {
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defer ms.increaseMsgCount(1)
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ms.msgChan <- pack
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return nil
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}
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func (ms *SimpleMsgStream) Broadcast(pack *MsgPack) error {
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return nil
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}
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func (ms *SimpleMsgStream) GetProduceChannels() []string {
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return nil
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}
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func (ms *SimpleMsgStream) Consume() *MsgPack {
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if ms.getMsgCount() <= 0 {
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return nil
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}
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defer ms.decreaseMsgCount(1)
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return <-ms.msgChan
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}
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func (ms *SimpleMsgStream) Seek(offset []*MsgPosition) error {
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return nil
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}
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func NewSimpleMsgStream() *SimpleMsgStream {
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return &SimpleMsgStream{
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msgChan: make(chan *MsgPack, 1024),
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msgCount: 0,
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}
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}
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type SimpleMsgStreamFactory struct {
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}
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func (factory *SimpleMsgStreamFactory) SetParams(params map[string]interface{}) error {
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return nil
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}
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func (factory *SimpleMsgStreamFactory) NewMsgStream(ctx context.Context) (MsgStream, error) {
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return NewSimpleMsgStream(), nil
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}
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func (factory *SimpleMsgStreamFactory) NewTtMsgStream(ctx context.Context) (MsgStream, error) {
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return NewSimpleMsgStream(), nil
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}
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func (factory *SimpleMsgStreamFactory) NewQueryMsgStream(ctx context.Context) (MsgStream, error) {
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return NewSimpleMsgStream(), nil
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}
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func NewSimpleMsgStreamFactory() *SimpleMsgStreamFactory {
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return &SimpleMsgStreamFactory{}
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}
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