rewrite to zmq push and pull patterns.

file load works, suite can start up

Azaion.CommonSecurity/Azaion.CommonSecurity.csproj

@@ -7,6 +7,9 @@
     </PropertyGroup>
 
     <ItemGroup>
+      <PackageReference Include="MessagePack" Version="3.1.0" />
+      <PackageReference Include="MessagePack.Annotations" Version="3.1.0" />
+      <PackageReference Include="NetMQ" Version="4.0.1.13" />
       <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
       <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.3.0" />
     </ItemGroup>

Azaion.CommonSecurity/DTO/Commands/FileCommand.cs

@@ -0,0 +1,24 @@
+using MessagePack;
+
+namespace Azaion.CommonSecurity.DTO.Commands;
+
+[MessagePackObject]
+public class FileCommand
+{
+    [Key("CommandType")]
+    public CommandType CommandType { get; set; }
+
+    [Key("Filename")]
+    public string Filename { get; set; }
+
+    [Key("Data")]
+    public byte[] Data { get; set; }
+
+}
+
+public enum CommandType
+{
+    None = 0,
+    Inference = 1,
+    Load = 2
+}

Azaion.CommonSecurity/SecurityConstants.cs

@@ -5,6 +5,7 @@ public class SecurityConstants
     public const string CONFIG_PATH = "config.json";
 
     public const string DUMMY_DIR = "dummy";
+
     #region ApiConfig
 
     public const string DEFAULT_API_URL = "https://api.azaion.com/";
@@ -16,4 +17,11 @@ public class SecurityConstants
     public const string CLAIM_ROLE = "role";
 
     #endregion ApiConfig
+
+    #region SocketClient
+    public const string SOCKET_HOST = "127.0.0.1";
+    public const int SOCKET_SEND_PORT = 5127;
+    public const int SOCKET_RECEIVE_PORT = 5128;
+
+    #endregion SocketClient
 }

Azaion.CommonSecurity/Services/ResourceLoader.cs

@@ -1,4 +1,8 @@
 using Azaion.CommonSecurity.DTO;
+using Azaion.CommonSecurity.DTO.Commands;
+using MessagePack;
+using NetMQ;
+using NetMQ.Sockets;
 
 namespace Azaion.CommonSecurity.Services;
 
@@ -7,6 +11,40 @@ public interface IResourceLoader
     Task<MemoryStream> Load(string fileName, CancellationToken cancellationToken = default);
 }
 
+public class PythonResourceLoader : IResourceLoader
+{
+    private readonly PushSocket _pushSocket = new();
+    private readonly PullSocket _pullSocket = new();
+
+    public PythonResourceLoader(ApiCredentials credentials)
+    {
+        //Run python by credentials
+        _pushSocket.Connect($"tcp://{SecurityConstants.SOCKET_HOST}:{SecurityConstants.SOCKET_SEND_PORT}");
+        _pullSocket.Connect($"tcp://{SecurityConstants.SOCKET_HOST}:{SecurityConstants.SOCKET_RECEIVE_PORT}");
+    }
+
+    public async Task<MemoryStream> Load(string fileName, CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            var b = MessagePackSerializer.Serialize(new FileCommand
+            {
+                CommandType = CommandType.Load,
+                Filename = fileName
+            });
+            _pushSocket.SendFrame(b);
+
+            var bytes = _pullSocket.ReceiveFrameBytes(out bool more);
+            return new MemoryStream(bytes);
+
+        }
+        catch (Exception ex)
+        {
+            throw new Exception($"Failed to load fil0e '{fileName}': {ex.Message}", ex);
+        }
+    }
+}
+
 public class ResourceLoader(AzaionApiClient api, ApiCredentials credentials) : IResourceLoader
 {
     public async Task<MemoryStream> Load(string fileName, CancellationToken cancellationToken = default)