/// <summary>
/// Specifies one or more nodes to monitor for data changes or events.
/// </summary>
public CreateMonitoredItemsResponseMessage CreateMonitoredItems(CreateMonitoredItemsMessage request)
{
try
{
lock (m_lock)
{
// verify session.
VerifySession(request.RequestHeader, false);
// look up subscription.
Subscription subscription = null;
if (!m_subscriptions.TryGetValue(request.SubscriptionId, out subscription))
{
throw new StatusCodeException(StatusCodes.BadSubscriptionIdInvalid, "Could not find subscription");
}
// process each item.
ListOfMonitoredItemCreateResult results = new ListOfMonitoredItemCreateResult();
ListOfDiagnosticInfo diagnosticInfos = new ListOfDiagnosticInfo();
for (int ii = 0; ii < request.ItemsToCreate.Count; ii++)
{
MonitoredItemCreateResult result = new MonitoredItemCreateResult();
DiagnosticInfo diagnosticInfo = new DiagnosticInfo();
subscription.CreateMonitoredItem(
request.TimestampsToReturn,
request.ItemsToCreate[ii],
result,
diagnosticInfo);
results.Add(result);
diagnosticInfos.Add(diagnosticInfo);
}
// return the response.
CreateMonitoredItemsResponseMessage response = new CreateMonitoredItemsResponseMessage();
response.ResponseHeader = CreateResponseHeader(request.RequestHeader);
response.Results = results;
response.DiagnosticInfos = diagnosticInfos;
return(response);
}
}
catch (Exception e)
{
throw CreateSoapFault(request.RequestHeader, e);
}
}
/// <summary>
/// Returns the target nodes found by following a browse path from a starting node.
/// </summary>
public TranslateBrowsePathsToNodeIdsResponseMessage TranslateBrowsePathsToNodeIds(TranslateBrowsePathsToNodeIdsMessage request)
{
try
{
lock (m_lock)
{
// verify that the session is still valid.
VerifySession(request.RequestHeader, false);
// process each path being followed.
ListOfBrowsePathResult results = new ListOfBrowsePathResult();
ListOfDiagnosticInfo diagnosticInfos = new ListOfDiagnosticInfo();
for (int ii = 0; ii < request.BrowsePaths.Count; ii++)
{
BrowsePathResult result = new BrowsePathResult();
DiagnosticInfo diagnosticInfo = new DiagnosticInfo();
m_nodeManager.TranslateBrowsePath(
request.BrowsePaths[ii],
result,
diagnosticInfo);
results.Add(result);
diagnosticInfos.Add(diagnosticInfo);
}
// return the response.
TranslateBrowsePathsToNodeIdsResponseMessage response = new TranslateBrowsePathsToNodeIdsResponseMessage();
response.ResponseHeader = CreateResponseHeader(request.RequestHeader);
response.Results = results;
response.DiagnosticInfos = diagnosticInfos;
return(response);
}
}
catch (Exception e)
{
throw CreateSoapFault(request.RequestHeader, e);
}
}
/// <summary>
/// Reads the values for one or more attributes.
/// </summary>
public ReadResponseMessage Read(ReadMessage request)
{
try
{
lock (m_lock)
{
// verify that the session is still valid.
VerifySession(request.RequestHeader, false);
// process each attribute.
ListOfDataValue results = new ListOfDataValue();
ListOfDiagnosticInfo diagnosticInfos = new ListOfDiagnosticInfo();
for (int ii = 0; ii < request.NodesToRead.Count; ii++)
{
DataValue result = new DataValue();
DiagnosticInfo diagnosticInfo = new DiagnosticInfo();
m_nodeManager.Read(
request.NodesToRead[ii],
result,
diagnosticInfo);
results.Add(result);
diagnosticInfos.Add(diagnosticInfo);
}
// return the response.
ReadResponseMessage response = new ReadResponseMessage();
response.ResponseHeader = CreateResponseHeader(request.RequestHeader);
response.Results = results;
response.DiagnosticInfos = diagnosticInfos;
return(response);
}
}
catch (Exception e)
{
throw CreateSoapFault(request.RequestHeader, e);
}
}
/// <summary>
/// Returns the references that meet the filter criteria for one or more nodes.
/// </summary>
public BrowseResponseMessage Browse(BrowseMessage request)
{
try
{
lock (m_lock)
{
// verify the session.
VerifySession(request.RequestHeader, false);
// process each node being browsed.
ListOfBrowseResult results = new ListOfBrowseResult();
ListOfDiagnosticInfo diagnosticInfos = new ListOfDiagnosticInfo();
for (int ii = 0; ii < request.NodesToBrowse.Count; ii++)
{
BrowseResult result = new BrowseResult();
DiagnosticInfo diagnosticInfo = new DiagnosticInfo();
m_nodeManager.Browse(
request.NodesToBrowse[ii],
result,
diagnosticInfo);
results.Add(result);
diagnosticInfos.Add(diagnosticInfo);
}
// return the response.
BrowseResponseMessage response = new BrowseResponseMessage();
response.ResponseHeader = CreateResponseHeader(request.RequestHeader);
response.Results = results;
response.DiagnosticInfos = diagnosticInfos;
return(response);
}
}
catch (Exception e)
{
throw CreateSoapFault(request.RequestHeader, e);
}
}
/// <summary>
/// Checks if the subscription is ready to publish and returns a notification message.
/// </summary>
public NotificationMessage Publish()
{
lock (m_lock)
{
long currentTime = DateTime.UtcNow.Ticks / TimeSpan.TicksPerMillisecond;
// check of it is time for a publish.
if (m_lastPublishTime + m_publishingInterval < currentTime)
{
ListOfMonitoredItemNotification notifications = new ListOfMonitoredItemNotification();
ListOfDiagnosticInfo diagnosticInfos = new ListOfDiagnosticInfo();
// check each monitored item for data changes to send.
foreach (MonitoredItem monitoredItem in m_monitoredItems.Values)
{
while (monitoredItem.Values.Count > 0)
{
MonitoredItemNotification notification = new MonitoredItemNotification();
notification.ClientHandle = monitoredItem.Parameters.ClientHandle;
notification.Value = monitoredItem.Values.Dequeue();
notifications.Add(notification);
diagnosticInfos.Add(monitoredItem.DiagnosticInfos.Dequeue());
}
}
// check if any notifications were found.
if (notifications.Count > 0)
{
// subscriptions can produce different types of notifications so the notification parameter
// is an extensible parameter. This means the object must be manually serialized and wrapped in
// an ExtensionObject which specifies the type of data contained in the Body. The complete
// UA SDK takes care this housekeeping and will serialize extensible parameters automatically.
DataChangeNotification body = new DataChangeNotification();
body.MonitoredItems = notifications;
body.DiagnosticInfos = diagnosticInfos;
ExtensionObject extension = new ExtensionObject(
new ExpandedNodeId(Objects.DataChangeNotification_Encoding_DefaultXml),
body);
// construct the message and assign a new sequence number.
NotificationMessage message = new NotificationMessage();
message.SequenceNumber = ++m_nextSequenceNumber;
message.PublishTime = DateTime.UtcNow;
message.NotificationData = new ListOfExtensionObject();
message.NotificationData.Add(extension);
m_lastPublishTime = currentTime;
m_nextKeepAliveTime = (long)(currentTime + m_publishingInterval * m_keepAliveCount);
return message;
}
}
// check if it is time for a keep alive.
if (m_nextKeepAliveTime < currentTime)
{
NotificationMessage message = new NotificationMessage();
message.SequenceNumber = m_nextSequenceNumber;
message.PublishTime = DateTime.UtcNow;
message.NotificationData = new ListOfExtensionObject();
m_nextKeepAliveTime = (long)(currentTime + m_publishingInterval * m_keepAliveCount);
return message;
}
return null;
}
}
/// <summary>
/// Specifies one or more nodes to monitor for data changes or events.
/// </summary>
public CreateMonitoredItemsResponseMessage CreateMonitoredItems(CreateMonitoredItemsMessage request)
{
try
{
lock (m_lock)
{
// verify session.
VerifySession(request.RequestHeader, false);
// look up subscription.
Subscription subscription = null;
if (!m_subscriptions.TryGetValue(request.SubscriptionId, out subscription))
{
throw new StatusCodeException(StatusCodes.BadSubscriptionIdInvalid, "Could not find subscription");
}
// process each item.
ListOfMonitoredItemCreateResult results = new ListOfMonitoredItemCreateResult();
ListOfDiagnosticInfo diagnosticInfos = new ListOfDiagnosticInfo();
for (int ii = 0; ii < request.ItemsToCreate.Count; ii++)
{
MonitoredItemCreateResult result = new MonitoredItemCreateResult();
DiagnosticInfo diagnosticInfo = new DiagnosticInfo();
subscription.CreateMonitoredItem(
request.TimestampsToReturn,
request.ItemsToCreate[ii],
result,
diagnosticInfo);
results.Add(result);
diagnosticInfos.Add(diagnosticInfo);
}
// return the response.
CreateMonitoredItemsResponseMessage response = new CreateMonitoredItemsResponseMessage();
response.ResponseHeader = CreateResponseHeader(request.RequestHeader);
response.Results = results;
response.DiagnosticInfos = diagnosticInfos;
return response;
}
}
catch (Exception e)
{
throw CreateSoapFault(request.RequestHeader, e);
}
}
/// <summary>
/// Reads the values for one or more attributes.
/// </summary>
public ReadResponseMessage Read(ReadMessage request)
{
try
{
lock (m_lock)
{
// verify that the session is still valid.
VerifySession(request.RequestHeader, false);
// process each attribute.
ListOfDataValue results = new ListOfDataValue();
ListOfDiagnosticInfo diagnosticInfos = new ListOfDiagnosticInfo();
for (int ii = 0; ii < request.NodesToRead.Count; ii++)
{
DataValue result = new DataValue();
DiagnosticInfo diagnosticInfo = new DiagnosticInfo();
m_nodeManager.Read(
request.NodesToRead[ii],
result,
diagnosticInfo);
results.Add(result);
diagnosticInfos.Add(diagnosticInfo);
}
// return the response.
ReadResponseMessage response = new ReadResponseMessage();
response.ResponseHeader = CreateResponseHeader(request.RequestHeader);
response.Results = results;
response.DiagnosticInfos = diagnosticInfos;
return response;
}
}
catch (Exception e)
{
throw CreateSoapFault(request.RequestHeader, e);
}
}
/// <summary>
/// Returns the target nodes found by following a browse path from a starting node.
/// </summary>
public TranslateBrowsePathsToNodeIdsResponseMessage TranslateBrowsePathsToNodeIds(TranslateBrowsePathsToNodeIdsMessage request)
{
try
{
lock (m_lock)
{
// verify that the session is still valid.
VerifySession(request.RequestHeader, false);
// process each path being followed.
ListOfBrowsePathResult results = new ListOfBrowsePathResult();
ListOfDiagnosticInfo diagnosticInfos = new ListOfDiagnosticInfo();
for (int ii = 0; ii < request.BrowsePaths.Count; ii++)
{
BrowsePathResult result = new BrowsePathResult();
DiagnosticInfo diagnosticInfo = new DiagnosticInfo();
m_nodeManager.TranslateBrowsePath(
request.BrowsePaths[ii],
result,
diagnosticInfo);
results.Add(result);
diagnosticInfos.Add(diagnosticInfo);
}
// return the response.
TranslateBrowsePathsToNodeIdsResponseMessage response = new TranslateBrowsePathsToNodeIdsResponseMessage();
response.ResponseHeader = CreateResponseHeader(request.RequestHeader);
response.Results = results;
response.DiagnosticInfos = diagnosticInfos;
return response;
}
}
catch (Exception e)
{
throw CreateSoapFault(request.RequestHeader, e);
}
}
/// <summary>
/// Returns the references that meet the filter criteria for one or more nodes.
/// </summary>
public BrowseResponseMessage Browse(BrowseMessage request)
{
try
{
lock (m_lock)
{
// verify the session.
VerifySession(request.RequestHeader, false);
// process each node being browsed.
ListOfBrowseResult results = new ListOfBrowseResult();
ListOfDiagnosticInfo diagnosticInfos = new ListOfDiagnosticInfo();
for (int ii = 0; ii < request.NodesToBrowse.Count; ii++)
{
BrowseResult result = new BrowseResult();
DiagnosticInfo diagnosticInfo = new DiagnosticInfo();
m_nodeManager.Browse(
request.NodesToBrowse[ii],
result,
diagnosticInfo);
results.Add(result);
diagnosticInfos.Add(diagnosticInfo);
}
// return the response.
BrowseResponseMessage response = new BrowseResponseMessage();
response.ResponseHeader = CreateResponseHeader(request.RequestHeader);
response.Results = results;
response.DiagnosticInfos = diagnosticInfos;
return response;
}
}
catch (Exception e)
{
throw CreateSoapFault(request.RequestHeader, e);
}
}
/// <summary>
/// Checks if the subscription is ready to publish and returns a notification message.
/// </summary>
public NotificationMessage Publish()
{
lock (m_lock)
{
long currentTime = DateTime.UtcNow.Ticks / TimeSpan.TicksPerMillisecond;
// check of it is time for a publish.
if (m_lastPublishTime + m_publishingInterval < currentTime)
{
ListOfMonitoredItemNotification notifications = new ListOfMonitoredItemNotification();
ListOfDiagnosticInfo diagnosticInfos = new ListOfDiagnosticInfo();
// check each monitored item for data changes to send.
foreach (MonitoredItem monitoredItem in m_monitoredItems.Values)
{
while (monitoredItem.Values.Count > 0)
{
MonitoredItemNotification notification = new MonitoredItemNotification();
notification.ClientHandle = monitoredItem.Parameters.ClientHandle;
notification.Value = monitoredItem.Values.Dequeue();
notifications.Add(notification);
diagnosticInfos.Add(monitoredItem.DiagnosticInfos.Dequeue());
}
}
// check if any notifications were found.
if (notifications.Count > 0)
{
// subscriptions can produce different types of notifications so the notification parameter
// is an extensible parameter. This means the object must be manually serialized and wrapped in
// an ExtensionObject which specifies the type of data contained in the Body. The complete
// UA SDK takes care this housekeeping and will serialize extensible parameters automatically.
DataChangeNotification body = new DataChangeNotification();
body.MonitoredItems = notifications;
body.DiagnosticInfos = diagnosticInfos;
ExtensionObject extension = new ExtensionObject(
new ExpandedNodeId(Objects.DataChangeNotification_Encoding_DefaultXml),
body);
// construct the message and assign a new sequence number.
NotificationMessage message = new NotificationMessage();
message.SequenceNumber = ++m_nextSequenceNumber;
message.PublishTime = DateTime.UtcNow;
message.NotificationData = new ListOfExtensionObject();
message.NotificationData.Add(extension);
m_lastPublishTime = currentTime;
m_nextKeepAliveTime = (long)(currentTime + m_publishingInterval * m_keepAliveCount);
return(message);
}
}
// check if it is time for a keep alive.
if (m_nextKeepAliveTime < currentTime)
{
NotificationMessage message = new NotificationMessage();
message.SequenceNumber = m_nextSequenceNumber;
message.PublishTime = DateTime.UtcNow;
message.NotificationData = new ListOfExtensionObject();
m_nextKeepAliveTime = (long)(currentTime + m_publishingInterval * m_keepAliveCount);
return(message);
}
return(null);
}
}