/// <summary>
/// Updates the list of servers displayed in the control.
/// </summary>
private void OnUpdateServers(object state)
{
if (this.InvokeRequired)
{
this.BeginInvoke(new WaitCallback(OnUpdateServers), state);
return;
}
ItemsLV.Items.Clear();
ServerOnNetworkCollection servers = state as ServerOnNetworkCollection;
if (servers != null)
{
foreach (ServerOnNetwork server in servers)
{
AddItem(server);
}
}
if (ItemsLV.Items.Count == 0)
{
this.Instructions = Utils.Format("No servers to display.");
}
AdjustColumns();
}
/// <summary>
/// Fetches the network servers from the discovery server.
/// </summary>
private bool DiscoverServersOnNetwork(Uri discoveryUrl)
{
// use a short timeout.
EndpointConfiguration configuration = EndpointConfiguration.Create(m_configuration);
configuration.OperationTimeout = m_discoveryTimeout;
DiscoveryClient client = null;
try
{
client = DiscoveryClient.Create(
discoveryUrl,
BindingFactory.Create(m_configuration, m_configuration.CreateMessageContext()),
EndpointConfiguration.Create(m_configuration));
uint startingRecordId = (uint)0;
uint maxRecordsToReturn = (uint)0;
StringCollection serverCapabilityFilter = new StringCollection();
DateTime lastCounterResetTime = DateTime.MinValue;
try
{
startingRecordId = (uint)m_startingRecordIdUpDown.Value;
maxRecordsToReturn = (uint)m_maxRecordsToReturnUpDown.Value;
if (!String.IsNullOrEmpty(m_capabilityFilterTextBox.Text))
{
serverCapabilityFilter = new StringCollection(m_capabilityFilterTextBox.Text.Split(','));
}
}
catch (Exception e)
{
Utils.Trace("Error retrieving FindServersOnNetwork paramters. Error=({1}){0}", e.Message, e.GetType());
return(false);
}
ServerOnNetworkCollection servers = client.FindServersOnNetwork(startingRecordId, maxRecordsToReturn, serverCapabilityFilter, out lastCounterResetTime);
m_discoveryUrl = discoveryUrl.ToString();
OnUpdateServers(servers);
return(true);
}
catch (Exception e)
{
Utils.Trace("DISCOVERY ERROR - Could not fetch servers from url: {0}. Error=({2}){1}", discoveryUrl, e.Message, e.GetType());
return(false);
}
finally
{
if (client != null)
{
client.Close();
}
}
}
/// <summary>
/// Invokes the FindServersOnNetwork service.
/// </summary>
public virtual ResponseHeader FindServersOnNetwork(
RequestHeader requestHeader,
uint startingRecordId,
uint maxRecordsToReturn,
StringCollection serverCapabilityFilter,
out DateTime lastCounterResetTime,
out ServerOnNetworkCollection servers)
{
lastCounterResetTime = DateTime.MinValue;
servers = null;
ValidateRequest(requestHeader);
// Insert implementation.
return(CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported));
}
/// <summary>
/// Invokes the FindServersOnNetwork service.
/// </summary>
/// <param name="startingRecordId"></param>
/// <param name="maxRecordsToReturn"></param>
/// <param name="serverCapabilityFilter"></param>
/// <param name="lastCounterResetTime"></param>
/// <returns></returns>
public virtual ServerOnNetworkCollection FindServersOnNetwork(
uint startingRecordId,
uint maxRecordsToReturn,
StringCollection serverCapabilityFilter,
out DateTime lastCounterResetTime)
{
ServerOnNetworkCollection servers = null;
FindServersOnNetwork(
null,
startingRecordId,
maxRecordsToReturn,
serverCapabilityFilter,
out lastCounterResetTime,
out servers);
return(servers);
}
/// <summary>
/// 发现网络中的服务端(主要为其他PC端获取本机的服务列表使用)
/// </summary>
/// <param name="requestHeader"></param>
/// <param name="startingRecordId"></param>
/// <param name="maxRecordsToReturn"></param>
/// <param name="serverCapabilityFilter"></param>
/// <param name="lastCounterResetTime"></param>
/// <param name="servers"></param>
/// <returns></returns>
public override ResponseHeader FindServersOnNetwork(
RequestHeader requestHeader,
uint startingRecordId,
uint maxRecordsToReturn,
StringCollection serverCapabilityFilter,
out DateTime lastCounterResetTime,
out ServerOnNetworkCollection servers)
{
lastCounterResetTime = DateTime.MinValue;
servers = null;
ValidateRequest(requestHeader);
try
{
lock (_serverTable)
{
uint rId = 0;
foreach (var item in _serverTable)
{
rId++;
servers.Add(new ServerOnNetwork()
{
DiscoveryUrl = item.DiscoveryUrls.FirstOrDefault(),
RecordId = rId,
ServerName = item.ServerNames.FirstOrDefault()?.Text,
ServerCapabilities = { "Realtime Data", "Events & Alarms" },
});
}
}
lastCounterResetTime = DateTime.Now;
return(CreateResponse(requestHeader, StatusCodes.Good));
}
catch (Exception ex)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("查找网络中的服务FindServersOnNetwork()时触发异常:" + ex.Message);
Console.ResetColor();
}
return(CreateResponse(requestHeader, StatusCodes.BadUnexpectedError));
}
private void OnFindServersOnNetworkComplete(IAsyncResult result)
{
FindServersOnNetworkData data = result.AsyncState as FindServersOnNetworkData;
try
{
DateTime lastCounterResetTime;
ServerOnNetworkCollection servers = null;
data.DiscoveryClient.EndFindServersOnNetwork(result, out lastCounterResetTime, out servers);
data.LastCounterResetTime = lastCounterResetTime;
data.Servers = servers;
data.OperationCompleted();
}
catch (Exception e)
{
data.Exception = e;
data.OperationCompleted();
}
}
/// <summary>
/// Invokes the FindServersOnNetwork service.
/// </summary>
public virtual ResponseHeader FindServersOnNetwork(
RequestHeader requestHeader,
uint startingRecordId,
uint maxRecordsToReturn,
StringCollection serverCapabilityFilter,
out DateTime lastCounterResetTime,
out ServerOnNetworkCollection servers)
{
lastCounterResetTime = DateTime.MinValue;
servers = null;
ValidateRequest(requestHeader);
// Insert implementation.
return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
}
public override ResponseHeader FindServersOnNetwork(RequestHeader requestHeader, uint startingRecordId, uint maxRecordsToReturn, StringCollection serverCapabilityFilter, out DateTime lastCounterResetTime, out ServerOnNetworkCollection servers)
{
return(base.FindServersOnNetwork(requestHeader, startingRecordId, maxRecordsToReturn, serverCapabilityFilter, out lastCounterResetTime, out servers));
}
/// <summary>
/// Finishes an asynchronous invocation of the FindServersOnNetwork service.
/// </summary>
public ResponseHeader EndFindServersOnNetwork(
IAsyncResult result,
out DateTime lastCounterResetTime,
out ServerOnNetworkCollection servers)
{
FindServersOnNetworkResponse response = null;
try
{
if (UseTransportChannel)
{
IServiceResponse genericResponse = TransportChannel.EndSendRequest(result);
if (genericResponse == null)
{
throw new ServiceResultException(StatusCodes.BadUnknownResponse);
}
ValidateResponse(genericResponse.ResponseHeader);
response = (FindServersOnNetworkResponse)genericResponse;
}
else
{
FindServersOnNetworkResponseMessage responseMessage = InnerChannel.EndFindServersOnNetwork(result);
if (responseMessage == null || responseMessage.FindServersOnNetworkResponse == null)
{
throw new ServiceResultException(StatusCodes.BadUnknownResponse);
}
response = responseMessage.FindServersOnNetworkResponse;
ValidateResponse(response.ResponseHeader);
}
lastCounterResetTime = response.LastCounterResetTime;
servers = response.Servers;
}
finally
{
RequestCompleted(null, response, "FindServersOnNetwork");
}
return response.ResponseHeader;
}
/// <summary>
/// Invokes the FindServersOnNetwork service.
/// </summary>
public virtual ResponseHeader FindServersOnNetwork(
RequestHeader requestHeader,
uint startingRecordId,
uint maxRecordsToReturn,
StringCollection serverCapabilityFilter,
out DateTime lastCounterResetTime,
out ServerOnNetworkCollection servers)
{
FindServersOnNetworkRequest request = new FindServersOnNetworkRequest();
FindServersOnNetworkResponse response = null;
request.RequestHeader = requestHeader;
request.StartingRecordId = startingRecordId;
request.MaxRecordsToReturn = maxRecordsToReturn;
request.ServerCapabilityFilter = serverCapabilityFilter;
UpdateRequestHeader(request, requestHeader == null, "FindServersOnNetwork");
try
{
if (UseTransportChannel)
{
IServiceResponse genericResponse = TransportChannel.SendRequest(request);
if (genericResponse == null)
{
throw new ServiceResultException(StatusCodes.BadUnknownResponse);
}
ValidateResponse(genericResponse.ResponseHeader);
response = (FindServersOnNetworkResponse)genericResponse;
}
else
{
FindServersOnNetworkResponseMessage responseMessage = InnerChannel.FindServersOnNetwork(new FindServersOnNetworkMessage(request));
if (responseMessage == null || responseMessage.FindServersOnNetworkResponse == null)
{
throw new ServiceResultException(StatusCodes.BadUnknownResponse);
}
response = responseMessage.FindServersOnNetworkResponse;
ValidateResponse(response.ResponseHeader);
}
lastCounterResetTime = response.LastCounterResetTime;
servers = response.Servers;
}
finally
{
RequestCompleted(request, response, "FindServersOnNetwork");
}
return response.ResponseHeader;
}
