public static INcApplicationGridService GetNcApplicationGridService(Node node)
{
try
{
string serviceUrl = node.ApplicationGridServiceUrl;
string hostIpAddress = MonoscapeUtil.FindHostIpAddress().ToString();
if (node.IpAddress.Equals(hostIpAddress) && (serviceUrl.Contains(node.IpAddress)))
{
Log.Debug(typeof(EndPoints), "Node " + node.ToString() + " is running on the same host as the Application Grid");
serviceUrl.Replace(node.IpAddress, "localhost");
}
Log.Debug(typeof(EndPoints), "Creating INcApplicationGridService channel to node: " + serviceUrl);
var binding = MonoscapeServiceHost.GetBinding();
var address = new EndpointAddress(serviceUrl);
ChannelFactory<INcApplicationGridService> factory = new ChannelFactory<INcApplicationGridService>(binding, address);
INcApplicationGridService channel = factory.CreateChannel();
return channel;
}
catch (Exception e)
{
MonoscapeException me = new MonoscapeException("Could not connect to the node", e);
Log.Error(typeof(EndPoints), me);
throw me;
}
}
public ApSubscribeNodeResponse SubscribeNode(ApSubscribeNodeRequest request)
{
Log.Debug(typeof(ApNodeControllerService), "SubscribeNode()");
try
{
// Remove existing node instance if already subscribed
Node existing = Database.GetInstance().Nodes.Find(x => x.IpAddress.Equals(request.IpAddress));
if (existing != null)
Database.GetInstance().Nodes.Remove(existing);
Node node = new Node();
// Initialize Node Id
// Multiple nodes may exist in the same host
node.Id = GetNextNodeId();
// Initialize node IP Address
node.IpAddress = request.IpAddress;
node.IpAddress_ = request.IpAddress_;
// Find node's virtual machine instance id from IaaS
node.InstanceId = FindInstanceId(request.IpAddress);
node.ApplicationGridServiceUrl = request.ApplicationGridServiceUrl;
node.FileTransferServiceUrl = request.FileTransferServiceUrl;
node.SubscribedOn = DateTime.Now;
// Update database
Database.GetInstance().Nodes.Add(node);
ApSubscribeNodeResponse response = new ApSubscribeNodeResponse();
// Send node information back
response.Node = node;
Log.Debug(typeof(ApNodeControllerService), "Node " + node.ToString() + " subscribed successfully");
return response;
}
catch (Exception e)
{
Log.Error(this, e);
throw e;
}
}
private void UploadApplicationToNode(int applicationId, Node node)
{
Log.Debug(this, "Uploading application " + applicationId + " to node " + node.ToString());
Application app = FindApplication(applicationId);
if (app != null)
{
string filePath = Path.Combine(Settings.ApplicationStorePath, app.FileName);
if (File.Exists(filePath))
{
Log.Debug(this, "Transferring application package...");
NcFileTransferSocket socket = new NcFileTransferSocket(node.IpAddress_, Settings.NcFileTransferSocketPort);
socket.SendFile(filePath);
Log.Debug(this, "Transferring application data...");
NcAddApplicationRequest request = new NcAddApplicationRequest(Credentials);
request.Application = app;
EndPoints.GetNcApplicationGridService(node).AddApplication(request);
}
else
{
throw new MonoscapeException("File not found: " + app.FileName);
}
}
else
{
throw new MonoscapeException("Application not found: " + app.Name);
}
}
private bool ApplicationExistsInNode(int applicationId, Node node)
{
NcApplicationExistsRequest request = new NcApplicationExistsRequest(Credentials);
request.ApplicationId = applicationId;
NcApplicationExistsResponse response = EndPoints.GetNcApplicationGridService(node).ApplicationExists(request);
return response.Exists;
}
internal static bool IsNodeAvailable(Node node)
{
try
{
// Echo node to check availability
Log.Debug(typeof(EndPoints), "Checking node " + node + " availability...");
GetNcApplicationGridService(node).Echo(new EchoRequest(Settings.Credentials));
Log.Debug(typeof(EndPoints), "Node " + node + " is online");
return true;
}
catch (EndpointNotFoundException)
{
Log.Debug(typeof(EndPoints), "Node " + node + " is offline");
return false;
}
}
