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Will DuanandGitHub
38689775d2
- initial commit - Initial implementation - Fix ## What changed? <!-- Describe what has changed in this PR --> Add implementation for Replication stream flow control ## Why? <!-- Tell your future self why have you made these changes --> To allow receiver back pressure to sender ## How did you test it? <!-- How have you verified this change? Tested locally? Added a unit test? Checked in staging env? --> integration test ## Potential risks <!-- Assuming the worst case, what can be broken when deploying this change to production? --> n/a ## Documentation <!-- Have you made sure this change doesn't falsify anything currently stated in `docs/`? If significant new behavior is added, have you described that in `docs/`? --> n/a ## Is hotfix candidate? <!-- Is this PR a hotfix candidate or does it require a notification to be sent to the broader community? (Yes/No) --> no
64 lines
2.6 KiB
Go
64 lines
2.6 KiB
Go
// The MIT License
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//
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// Copyright (c) 2020 Temporal Technologies Inc. All rights reserved.
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//
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// Copyright (c) 2020 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//go:generate mockgen -copyright_file ../../../LICENSE -package $GOPACKAGE -source $GOFILE -destination stream_receiver_flow_controller_mock.go
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package replication
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import (
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"go.temporal.io/server/api/enums/v1"
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"go.temporal.io/server/service/history/configs"
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)
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type (
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FlowControlSignalProvider func() *FlowControlSignal
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// FlowControlSignal holds signals to make flow control decision, more signalsProvider can be added here i.e. total persistence rps, cpu usage etc.
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FlowControlSignal struct {
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taskTrackingCount int
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}
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ReceiverFlowController interface {
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GetFlowControlInfo(priority enums.TaskPriority) enums.ReplicationFlowControlCommand
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}
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streamReceiverFlowControllerImpl struct {
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signalsProvider map[enums.TaskPriority]FlowControlSignalProvider
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config *configs.Config
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}
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)
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func NewReceiverFlowControl(signals map[enums.TaskPriority]FlowControlSignalProvider, config *configs.Config) *streamReceiverFlowControllerImpl {
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return &streamReceiverFlowControllerImpl{
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signalsProvider: signals,
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config: config,
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}
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}
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func (s *streamReceiverFlowControllerImpl) GetFlowControlInfo(priority enums.TaskPriority) enums.ReplicationFlowControlCommand {
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if signal, ok := s.signalsProvider[priority]; ok {
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if signal().taskTrackingCount > s.config.ReplicationReceiverMaxOutstandingTaskCount() {
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return enums.REPLICATION_FLOW_CONTROL_COMMAND_PAUSE
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}
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}
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return enums.REPLICATION_FLOW_CONTROL_COMMAND_RESUME
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}
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