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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package core
// InitFlowSynchronization wraps init flow barriers.
type InitFlowSynchronization interface {
SetExternalAgentsRegisterCount(uint16) error
SetAgentsReadyCount(uint16) error
ExternalAgentRegistered() error
AwaitExternalAgentsRegistered() error
RuntimeReady() error
AwaitRuntimeReady() error
AgentReady() error
AwaitAgentsReady() error
CancelWithError(error)
Clear()
}
type initFlowSynchronizationImpl struct {
externalAgentsRegisteredGate Gate
runtimeReadyGate Gate
agentReadyGate Gate
}
// SetExternalAgentsRegisterCount notifies init flow that N /extension/register calls should be done in future by external agents
func (s *initFlowSynchronizationImpl) SetExternalAgentsRegisterCount(externalAgentsNumber uint16) error {
return s.externalAgentsRegisteredGate.SetCount(externalAgentsNumber)
}
// SetAgentsReadyCount sets the number of agents we expect at the gate once we know it
func (s *initFlowSynchronizationImpl) SetAgentsReadyCount(agentCount uint16) error {
return s.agentReadyGate.SetCount(agentCount)
}
// AwaitRuntimeReady awaits runtime ready state
func (s *initFlowSynchronizationImpl) AwaitRuntimeReady() error {
return s.runtimeReadyGate.AwaitGateCondition()
}
// AwaitExternalAgentsRegistered awaits for all subscribed agents to report registered
func (s *initFlowSynchronizationImpl) AwaitExternalAgentsRegistered() error {
return s.externalAgentsRegisteredGate.AwaitGateCondition()
}
// AwaitAgentReady awaits for registered extensions to report ready
func (s *initFlowSynchronizationImpl) AwaitAgentsReady() error {
return s.agentReadyGate.AwaitGateCondition()
}
// Ready called by runtime when initialized
func (s *initFlowSynchronizationImpl) RuntimeReady() error {
return s.runtimeReadyGate.WalkThrough()
}
// Ready called by agent when initialized
func (s *initFlowSynchronizationImpl) AgentReady() error {
return s.agentReadyGate.WalkThrough()
}
// ExternalAgentRegistered called by agent as part of /register request
func (s *initFlowSynchronizationImpl) ExternalAgentRegistered() error {
return s.externalAgentsRegisteredGate.WalkThrough()
}
// Cancel cancels gates with error.
func (s *initFlowSynchronizationImpl) CancelWithError(err error) {
s.externalAgentsRegisteredGate.CancelWithError(err)
s.runtimeReadyGate.CancelWithError(err)
s.agentReadyGate.CancelWithError(err)
}
// Clear gates state
func (s *initFlowSynchronizationImpl) Clear() {
s.externalAgentsRegisteredGate.Clear()
s.runtimeReadyGate.Clear()
s.agentReadyGate.Clear()
}
// NewInitFlowSynchronization returns new InitFlowSynchronization instance.
func NewInitFlowSynchronization() InitFlowSynchronization {
initFlow := &initFlowSynchronizationImpl{
runtimeReadyGate: NewGate(1),
externalAgentsRegisteredGate: NewGate(0),
agentReadyGate: NewGate(maxAgentsLimit),
}
return initFlow
}
// InvokeFlowSynchronization wraps invoke flow barriers.
type InvokeFlowSynchronization interface {
InitializeBarriers() error
AwaitRuntimeResponse() error
AwaitRuntimeReady() error
RuntimeResponse(runtime *Runtime) error
RuntimeReady(runtime *Runtime) error
SetAgentsReadyCount(agentCount uint16) error
AgentReady() error
AwaitAgentsReady() error
CancelWithError(error)
Clear()
}
type invokeFlowSynchronizationImpl struct {
runtimeReadyGate Gate
runtimeResponseGate Gate
agentReadyGate Gate
}
// InitializeBarriers ...
func (s *invokeFlowSynchronizationImpl) InitializeBarriers() error {
s.runtimeReadyGate.Reset()
s.runtimeResponseGate.Reset()
s.agentReadyGate.Reset()
return nil
}
// Clear gates state
func (s *invokeFlowSynchronizationImpl) Clear() {
s.runtimeReadyGate.Clear()
s.runtimeResponseGate.Clear()
s.agentReadyGate.Clear()
}
// AwaitRuntimeResponse awaits runtime to send response to the platform.
func (s *invokeFlowSynchronizationImpl) AwaitRuntimeResponse() error {
return s.runtimeResponseGate.AwaitGateCondition()
}
// AwaitRuntimeReady awaits runtime ready state.
func (s *invokeFlowSynchronizationImpl) AwaitRuntimeReady() error {
return s.runtimeReadyGate.AwaitGateCondition()
}
// RuntimeResponse called by runtime when runtime response is made available to the platform.
func (s *invokeFlowSynchronizationImpl) RuntimeResponse(a *Runtime) error {
return s.runtimeResponseGate.WalkThrough()
}
// RuntimeReady called by runtime when runtime ready.
func (s *invokeFlowSynchronizationImpl) RuntimeReady(a *Runtime) error {
return s.runtimeReadyGate.WalkThrough()
}
// Cancel cancels gates.
func (s *invokeFlowSynchronizationImpl) CancelWithError(err error) {
s.runtimeResponseGate.CancelWithError(err)
s.runtimeReadyGate.CancelWithError(err)
s.agentReadyGate.CancelWithError(err)
}
// SetAgentsReadyCount sets the number of agents we expect at the gate once we know it
func (s *invokeFlowSynchronizationImpl) SetAgentsReadyCount(agentCount uint16) error {
return s.agentReadyGate.SetCount(agentCount)
}
// Ready called by agent when initialized
func (s *invokeFlowSynchronizationImpl) AgentReady() error {
return s.agentReadyGate.WalkThrough()
}
// AwaitAgentReady awaits for registered extensions to report ready
func (s *invokeFlowSynchronizationImpl) AwaitAgentsReady() error {
return s.agentReadyGate.AwaitGateCondition()
}
// NewInvokeFlowSynchronization returns new InvokeFlowSynchronization instance.
func NewInvokeFlowSynchronization() InvokeFlowSynchronization {
return &invokeFlowSynchronizationImpl{
runtimeReadyGate: NewGate(1),
runtimeResponseGate: NewGate(1),
agentReadyGate: NewGate(maxAgentsLimit),
}
}