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' DWSIM Flowsheet Solver Server for Microsoft Azure (TM) Service Bus
' Copyright 2015 Daniel Wagner O. de Medeiros
'
' This file is part of DWSIM.
'
' DWSIM is free software: you can redistribute it and/or modify
' it under the terms of the GNU General Public License as published by
' the Free Software Foundation, either version 3 of the License, or
' (at your option) any later version.
'
' DWSIM is distributed in the hope that it will be useful,
' but WITHOUT ANY WARRANTY; without even the implied warranty of
' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
' GNU General Public License for more details.
'
' You should have received a copy of the GNU General Public License
' along with DWSIM. If not, see <http://www.gnu.org/licenses/>.
Imports DWSIM
Imports System.IO
Imports System.Threading
Imports System.Threading.Tasks
Imports Microsoft.ServiceBus
Imports Microsoft.ServiceBus.Messaging
Imports System.Linq
Imports System.Reflection
Imports System.Runtime.Serialization.Formatters.Binary
Module AzureServer
Private nm As NamespaceManager
Private qcc, qcs As QueueClient
Private queueNameS As String = "DWSIMserver"
Private queueNameC As String = "DWSIMclient"
Private solutions As Dictionary(Of String, Byte())
Dim ts As CancellationTokenSource
Sub Main()
solutions = New Dictionary(Of String, Byte())
Console.WriteLine()
Console.WriteLine("DWSIM - Open Source Process Simulator")
Console.WriteLine("Microsoft Azure (TM) Service Bus Solver Server")
Console.WriteLine(My.Application.Info.Copyright)
Dim dt As DateTime = CType("01/01/2000", DateTime).AddDays(My.Application.Info.Version.Build).AddSeconds(My.Application.Info.Version.Revision * 2)
Console.WriteLine("Version " & My.Application.Info.Version.Major & "." & My.Application.Info.Version.Minor & _
", Build " & My.Application.Info.Version.Build & " (" & Format(dt, "dd/MM/yyyy HH:mm") & ")")
If Type.GetType("Mono.Runtime") Is Nothing Then
Console.WriteLine("Microsoft .NET Framework Runtime Version " & System.Runtime.InteropServices.RuntimeEnvironment.GetSystemVersion.ToString())
Else
Dim displayName As MethodInfo = Type.GetType("Mono.Runtime").GetMethod("GetDisplayName", BindingFlags.NonPublic Or BindingFlags.[Static])
If displayName IsNot Nothing Then
Console.WriteLine("Mono " + displayName.Invoke(Nothing, Nothing) + " / " + System.Runtime.InteropServices.RuntimeEnvironment.GetSystemVersion.ToString())
Else
Console.WriteLine(System.Runtime.InteropServices.RuntimeEnvironment.GetSystemVersion.ToString())
End If
End If
Console.WriteLine()
Dim connectionString As String
If My.Application.CommandLineArgs.Count > 0 Then
connectionString = My.Application.CommandLineArgs(0)
Else
Console.Write("Please enter the Service Bus connection string: ")
connectionString = Console.ReadLine()
End If
Try
nm = NamespaceManager.CreateFromConnectionString(connectionString)
If Not nm.QueueExists(queueNameC) Then nm.CreateQueue(queueNameC)
If Not nm.QueueExists(queueNameS) Then nm.CreateQueue(queueNameS)
qcc = QueueClient.CreateFromConnectionString(connectionString, queueNameC)
qcs = QueueClient.CreateFromConnectionString(connectionString, queueNameS)
Console.WriteLine("[" & Date.Now.ToString & "] " & "Server is clearing messages on queues...")
While (qcc.Peek() IsNot Nothing)
Dim brokeredMessage = qcc.Receive(New TimeSpan(0, 0, 0))
If Not brokeredMessage Is Nothing Then brokeredMessage.Complete()
End While
While (qcs.Peek() IsNot Nothing)
Dim brokeredMessage = qcs.Receive(New TimeSpan(0, 0, 0))
If Not brokeredMessage Is Nothing Then brokeredMessage.Complete()
End While
Console.WriteLine("[" & Date.Now.ToString & "] " & "Cleared ok")
Console.WriteLine("[" & Date.Now.ToString & "] " & "Server is running and listening to incoming data on queue '" & queueNameC & "'...")
Dim bytearr As New List(Of Byte())
Dim icounter As Integer = 100
While True
If ts Is Nothing Then ts = New CancellationTokenSource
Dim ct As CancellationToken = ts.Token
Thread.Sleep(1000)
Dim message As BrokeredMessage
message = qcc.Receive(New TimeSpan(0, 0, 0))
If Not message Is Nothing Then
If message.Properties("origin") = "client" Then
Dim requestID As String = message.Properties("requestID")
Try
If message.Properties("type") = "abort" Then
ts.Cancel()
ElseIf message.Properties("type") = "data" Then
Dim i, n As Integer
Dim bytes As Byte() = message.GetBody(Of Byte())()
message.Complete()
If message.Properties("multipart") = False Then
i = 0
n = 0
Else
i = message.Properties("partnumber")
n = message.Properties("totalparts")
If i = 1 Then
bytearr.Clear()
bytearr.Add(bytes)
ElseIf i > 1 And i < n Then
bytearr.Add(bytes)
Else
bytearr.Add(bytes)
bytes = Combine(bytearr.ToArray)
End If
End If
If i = n Then
Console.WriteLine("[" & Date.Now.ToString & "] Data received with Request ID = " & requestID & ", flowsheet solving started!")
Dim msg As New BrokeredMessage("Data received, flowsheet solving started!")
msg.Properties.Add("requestID", requestID)
msg.Properties.Add("type", "text")
msg.Properties.Add("origin", "server")
qcs.Send(msg)
Task.Factory.StartNew(Sub()
ProcessData(bytes, requestID)
End Sub,
TaskCreationOptions.LongRunning,
ct).ContinueWith(Sub(t)
If Not t Is Nothing Then
If Not t.Exception Is Nothing Then
Console.WriteLine("[" & Date.Now.ToString & "] " & t.Exception.Flatten().ToString)
msg = New BrokeredMessage(t.Exception.Flatten().ToString)
msg.Properties.Add("requestID", requestID)
msg.Properties.Add("type", "exception")
msg.Properties.Add("origin", "server")
qcs.Send(msg)
ElseIf t.IsCanceled Then
Console.WriteLine("[" & Date.Now.ToString & "] " & "Calculation aborted.")
msg = New BrokeredMessage("Calculation aborted.")
msg.Properties.Add("requestID", requestID)
msg.Properties.Add("type", "text")
msg.Properties.Add("origin", "server")
qcs.Send(msg)
End If
End If
End Sub,
TaskContinuationOptions.OnlyOnFaulted).ContinueWith(Sub()
ts.Dispose()
ts = Nothing
End Sub)
End If
ElseIf message.Properties("type") = "connectioncheck" Then
message.Complete()
Dim msg As New BrokeredMessage("Server endpoint '" & My.User.Name & "@" & My.Computer.Name & "' is listening to requests")
msg.Properties.Add("requestID", requestID)
msg.Properties.Add("type", "connectioncheck")
msg.Properties.Add("origin", "server")
qcs.Send(msg)
End If
Catch ex As Exception
Dim msg As New BrokeredMessage(ex.ToString)
msg.Properties.Add("requestID", requestID)
msg.Properties.Add("type", "exception")
msg.Properties.Add("origin", "server")
qcs.Send(msg)
End Try
End If
End If
icounter += 1
If Math.IEEERemainder(icounter, 100) = 0 Then
Dim binFormatter = New BinaryFormatter()
Dim mStream = New MemoryStream()
binFormatter.Serialize(mStream, solutions)
If mStream.Length > 100 * 1024 * 1024 Then
solutions.Clear()
End If
End If
End While
qcc.Close()
qcs.Close()
Catch ex As Exception
Console.WriteLine("[" & Date.Now.ToString & "] " & ex.ToString)
End Try
End Sub
Sub ProcessData(bytes As Byte(), requestID As String)
Using bytestream As New MemoryStream(bytes)
Using form As FormFlowsheet = DWSIM.UnitOperations.UnitOperations.Flowsheet.InitializeFlowsheet(bytestream, New FormFlowsheet)
If Not solutions.ContainsKey(form.Options.Key) Then
FlowsheetSolver.FlowsheetSolver.SolveFlowsheet(form, 1, ts)
Using retbytes As MemoryStream = DWSIM.UnitOperations.UnitOperations.Flowsheet.ReturnProcessData(form)
Dim uncompressedbytes As Byte() = retbytes.ToArray
Using compressedstream As New MemoryStream()
Using gzs As New BufferedStream(New Compression.GZipStream(compressedstream, Compression.CompressionMode.Compress, True), 64 * 1024)
gzs.Write(uncompressedbytes, 0, uncompressedbytes.Length)
gzs.Close()
solutions.Add(form.Options.Key, compressedstream.ToArray)
End Using
End Using
End Using
End If
If solutions(form.Options.Key).Length < 220 * 1024 Then
Dim msg As New BrokeredMessage(solutions(form.Options.Key))
msg.Properties.Add("multipart", False)
msg.Properties.Add("requestID", requestID)
msg.Properties.Add("origin", "server")
msg.Properties.Add("type", "data")
qcs.Send(msg)
Console.WriteLine("[" & Date.Now.ToString & "] " & "Sent data to the queue: " & solutions(form.Options.Key).Length & " B, Request ID = " & requestID)
Else
Dim i, n As Integer
Dim bytearray As ArrayList = Split(solutions(form.Options.Key), 220)
n = bytearray.Count
i = 1
For Each b As Byte() In bytearray
Dim msg As New BrokeredMessage(b)
msg.Properties.Add("multipart", True)
msg.Properties.Add("partnumber", i)
msg.Properties.Add("totalparts", n)
msg.Properties.Add("type", "data")
msg.Properties.Add("requestID", requestID)
msg.Properties.Add("origin", "server")
qcs.Send(msg)
i += 1
Console.WriteLine("[" & Date.Now.ToString & "] " & "Sent data to the queue: " & b.Length & " B, Request ID = " & requestID)
Next
End If
End Using
End Using
End Sub
Private Function Split(filebytes As Byte(), partsizeKB As Integer) As ArrayList
partsizeKB *= 1000
Dim pos As Integer = 0
Dim remaining As Integer
Dim result As New ArrayList()
remaining = filebytes.Length - pos
While remaining > 0
Dim block As Byte() = New Byte(Math.Min(remaining, partsizeKB) - 1) {}
Array.Copy(filebytes, pos, block, 0, block.Length)
result.Add(block)
pos += block.Length
remaining = filebytes.Length - pos
End While
Return result
End Function
Private Function Combine(ParamArray arrays As Byte()()) As Byte()
Dim rv As Byte() = New Byte(arrays.Sum(Function(a) a.Length) - 1) {}
Dim offset As Integer = 0
For Each array As Byte() In arrays
System.Buffer.BlockCopy(array, 0, rv, offset, array.Length)
offset += array.Length
Next
Return rv
End Function
End Module
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