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subscription_manager.go
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subscription_manager.go
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package server
import (
"context"
"fmt"
"log"
"sync"
"time"
"github.com/awcullen/opcua/ua"
"github.com/google/uuid"
)
// SubscriptionManager manages the subscriptions for a server.
type SubscriptionManager struct {
sync.RWMutex
server *Server
subscriptionsByID map[uint32]*Subscription
}
// NewSubscriptionManager instantiates a new SubscriptionManager.
func NewSubscriptionManager(server *Server) *SubscriptionManager {
m := &SubscriptionManager{server: server, subscriptionsByID: make(map[uint32]*Subscription)}
go func(m *SubscriptionManager) {
ticker := time.NewTicker(60 * time.Second)
defer ticker.Stop()
for {
select {
case <-ticker.C:
m.checkForExpiredSubscriptions()
case <-m.server.closing:
m.RLock()
for _, v := range m.subscriptionsByID {
v.stopPublishing()
}
m.RUnlock()
return
}
}
}(m)
return m
}
// Get a subscription from the server.
func (m *SubscriptionManager) Get(id uint32) (*Subscription, bool) {
m.RLock()
defer m.RUnlock()
if s, ok := m.subscriptionsByID[id]; ok {
return s, ok
}
return nil, false
}
// Add a subscription to the server.
func (m *SubscriptionManager) Add(s *Subscription) error {
m.Lock()
defer m.Unlock()
maxSubscriptionCount := m.server.MaxSubscriptionCount()
if maxSubscriptionCount > 0 && len(m.subscriptionsByID) >= int(maxSubscriptionCount) {
return ua.BadTooManySubscriptions
}
m.subscriptionsByID[s.id] = s
if m.server.serverDiagnostics {
m.addDiagnosticsNode(s)
m.server.serverDiagnosticsSummary.CumulatedSubscriptionCount++
m.server.serverDiagnosticsSummary.CurrentSubscriptionCount = uint32(len(m.subscriptionsByID))
}
return nil
}
// Delete the subscription from the server.
func (m *SubscriptionManager) Delete(s *Subscription) {
m.Lock()
defer m.Unlock()
delete(m.subscriptionsByID, s.id)
if m.server.serverDiagnostics {
m.removeDiagnosticsNode(s)
m.server.serverDiagnosticsSummary.CurrentSubscriptionCount = uint32(len(m.subscriptionsByID))
}
}
// Len returns the number of subscriptions.
func (m *SubscriptionManager) Len() int {
m.RLock()
defer m.RUnlock()
return len(m.subscriptionsByID)
}
// GetBySession returns subscriptions for the session.
func (m *SubscriptionManager) GetBySession(session *Session) []*Subscription {
m.RLock()
defer m.RUnlock()
subs := make([]*Subscription, 0, 4)
for _, sub := range m.subscriptionsByID {
if sub.session == session {
subs = append(subs, sub)
}
}
return subs
}
func (m *SubscriptionManager) checkForExpiredSubscriptions() {
m.Lock()
defer m.Unlock()
for k, s := range m.subscriptionsByID {
if s.IsExpired() {
delete(m.subscriptionsByID, k)
if m.server.serverDiagnostics {
// remove diagnostic node
nm := m.server.NamespaceManager()
if n, ok := nm.FindNode(s.diagnosticsNodeId); ok {
nm.DeleteNode(n, true)
}
m.server.Lock()
m.server.serverDiagnosticsSummary.CurrentSubscriptionCount = uint32(len(m.subscriptionsByID))
m.server.Unlock()
}
// log.Printf("Deleted expired subscription '%d'.\n", k)
s.Delete()
}
}
}
func (m *SubscriptionManager) addDiagnosticsNode(s *Subscription) {
srv := m.server
nm := srv.NamespaceManager()
nodes := []Node{}
refs := []ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDSubscriptionDiagnosticsType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(ua.VariableIDServerServerDiagnosticsSubscriptionDiagnosticsArray)),
}
if n1, ok := nm.FindNode(s.sessionId); ok {
if n2, ok := nm.FindComponent(n1, ua.NewQualifiedName(0, "SubscriptionDiagnosticsArray")); ok {
refs = append(refs, ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(n2.NodeID())))
}
}
subscriptionDiagnosticsVariable := NewVariableNode(
s.diagnosticsNodeId,
ua.NewQualifiedName(uint16(1), fmt.Sprint(s.id)),
ua.NewLocalizedText(fmt.Sprint(s.id), ""),
ua.NewLocalizedText("", ""),
nil,
refs,
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDSubscriptionDiagnosticsDataType,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
subscriptionDiagnosticsVariable.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
s.RLock()
defer s.RUnlock()
dv := ua.NewDataValue(ua.SubscriptionDiagnosticsDataType{
SessionID: s.sessionId,
SubscriptionID: s.id,
Priority: s.priority,
PublishingInterval: s.publishingInterval,
MaxKeepAliveCount: s.maxKeepAliveCount,
MaxLifetimeCount: s.lifetimeCount,
MaxNotificationsPerPublish: s.maxNotificationsPerPublish,
PublishingEnabled: s.publishingEnabled,
ModifyCount: s.modifyCount,
// EnableCount: uint32(0),
// DisableCount: uint32(0),
RepublishRequestCount: s.republishRequestCount,
RepublishMessageRequestCount: s.republishMessageRequestCount,
RepublishMessageCount: s.republishMessageCount,
// TransferRequestCount: uint32(0),
// TransferredToAltClientCount: uint32(0),
// TransferredToSameClientCount: uint32(0),
PublishRequestCount: s.publishRequestCount,
DataChangeNotificationsCount: s.dataChangeNotificationsCount,
EventNotificationsCount: s.eventNotificationsCount,
NotificationsCount: s.notificationsCount,
LatePublishRequestCount: s.latePublishRequestCount,
CurrentKeepAliveCount: s.keepAliveCounter,
CurrentLifetimeCount: s.lifetimeCounter,
UnacknowledgedMessageCount: s.unacknowledgedMessageCount,
// DiscardedMessageCount: uint32(0),
MonitoredItemCount: s.monitoredItemCount,
DisabledMonitoredItemCount: s.disabledMonitoredItemCount,
MonitoringQueueOverflowCount: s.monitoringQueueOverflowCount,
NextSequenceNumber: s.seqNum,
// EventQueueOverFlowCount: uint32(0),
}, 0, time.Now(), 0, time.Now(), 0)
return dv
})
nodes = append(nodes, subscriptionDiagnosticsVariable)
n := NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "SessionId"),
ua.NewLocalizedText("SessionId", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDNodeID,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.sessionId, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "SubscriptionId"),
ua.NewLocalizedText("SubscriptionId", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.id, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "Priority"),
ua.NewLocalizedText("Priority", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDByte,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.priority, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "PublishingInterval"),
ua.NewLocalizedText("PublishingInterval", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDDouble,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.publishingInterval, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "MaxKeepAliveCount"),
ua.NewLocalizedText("MaxKeepAliveCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.maxKeepAliveCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "MaxLifetimeCount"),
ua.NewLocalizedText("MaxLifetimeCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.lifetimeCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "MaxNotificationsPerPublish"),
ua.NewLocalizedText("MaxNotificationsPerPublish", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.maxNotificationsPerPublish, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "PublishingEnabled"),
ua.NewLocalizedText("PublishingEnabled", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDBoolean,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.publishingEnabled, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "ModifyCount"),
ua.NewLocalizedText("ModifyCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.modifyCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "EnableCount"),
ua.NewLocalizedText("EnableCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(uint32(0), 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "DisableCount"),
ua.NewLocalizedText("DisableCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(uint32(0), 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "RepublishRequestCount"),
ua.NewLocalizedText("RepublishRequestCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.republishRequestCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "RepublishMessageRequestCount"),
ua.NewLocalizedText("RepublishMessageRequestCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.republishMessageRequestCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "RepublishMessageCount"),
ua.NewLocalizedText("RepublishMessageCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.republishMessageCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "TransferRequestCount"),
ua.NewLocalizedText("TransferRequestCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(uint32(0), 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "TransferredToAltClientCount"),
ua.NewLocalizedText("TransferredToAltClientCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(uint32(0), 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "TransferredToSameClientCount"),
ua.NewLocalizedText("TransferredToSameClientCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(uint32(0), 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "PublishRequestCount"),
ua.NewLocalizedText("PublishRequestCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.publishRequestCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "DataChangeNotificationsCount"),
ua.NewLocalizedText("DataChangeNotificationsCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.dataChangeNotificationsCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "EventNotificationsCount"),
ua.NewLocalizedText("EventNotificationsCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.eventNotificationsCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "NotificationsCount"),
ua.NewLocalizedText("NotificationsCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.notificationsCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "LatePublishRequestCount"),
ua.NewLocalizedText("LatePublishRequestCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.latePublishRequestCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "CurrentKeepAliveCount"),
ua.NewLocalizedText("CurrentKeepAliveCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.keepAliveCounter, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "CurrentLifetimeCount"),
ua.NewLocalizedText("CurrentLifetimeCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.lifetimeCounter, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "UnacknowledgedMessageCount"),
ua.NewLocalizedText("UnacknowledgedMessageCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.unacknowledgedMessageCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "DiscardedMessageCount"),
ua.NewLocalizedText("DiscardedMessageCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(uint32(0), 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "MonitoredItemCount"),
ua.NewLocalizedText("MonitoredItemCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.monitoredItemCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "DisabledMonitoredItemCount"),
ua.NewLocalizedText("DisabledMonitoredItemCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.disabledMonitoredItemCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "MonitoringQueueOverflowCount"),
ua.NewLocalizedText("MonitoringQueueOverflowCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.monitoringQueueOverflowCount, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "NextSequenceNumber"),
ua.NewLocalizedText("NextSequenceNumber", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(s.seqNum, 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
n = NewVariableNode(
ua.NewNodeIDGUID(1, uuid.New()),
ua.NewQualifiedName(0, "EventQueueOverFlowCount"),
ua.NewLocalizedText("EventQueueOverFlowCount", ""),
ua.NewLocalizedText("", ""),
nil,
[]ua.Reference{
ua.NewReference(ua.ReferenceTypeIDHasTypeDefinition, false, ua.NewExpandedNodeID(ua.VariableTypeIDBaseDataVariableType)),
ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(subscriptionDiagnosticsVariable.NodeID())),
},
ua.NewDataValue(nil, ua.BadWaitingForInitialData, time.Now(), 0, time.Now(), 0),
ua.DataTypeIDUInt32,
ua.ValueRankScalar,
[]uint32{},
ua.AccessLevelsCurrentRead,
125,
false,
)
n.SetReadValueHandler(func(ctx context.Context, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(uint32(0), 0, time.Now(), 0, time.Now(), 0)
})
nodes = append(nodes, n)
err := nm.AddNodes(nodes)
if err != nil {
log.Printf("Error adding session diagnostics objects.\n")
}
}
func (m *SubscriptionManager) removeDiagnosticsNode(s *Subscription) {
nm := m.server.NamespaceManager()
if n, ok := nm.FindNode(s.diagnosticsNodeId); ok {
nm.DeleteNode(n, true)
}
}