feat: static model loader

bindings/cs/rl.net.cli/BasicUsageCommand.cs

@@ -6,7 +6,7 @@ namespace Rl.Net.Cli
     [Verb("basicUsage", HelpText = "Basic usage of the API")]
     class BasicUsageCommand : CommandBase
     {
-        [Option(longName: "testType", HelpText = "select from (liveModel, caLoop, cbLoop, ccbLoop, pdfExample, slatesLoop) basic usage examples", Required = false, Default = "liveModel")]
+        [Option(longName: "testType", HelpText = "select from (liveModel, liveModelStatic, caLoop, cbLoop, ccbLoop, pdfExample, slatesLoop) basic usage examples", Required = false, Default = "liveModel")]
         public string testType { get; set; }
 
         public override void Run()
@@ -16,6 +16,9 @@ public override void Run()
                 case "liveModel":
                     BasicUsage(this.ConfigPath);
                     break;
+                case "liveModelStatic":
+                    BasicUsageStaticModel(this.ConfigPath, this.ModelPath);
+                    break;
                 case "caLoop":
                     BasicUsageCALoop(this.ConfigPath);
                     break;
@@ -68,6 +71,37 @@ public static void BasicUsage(string configPath)
             Console.WriteLine("Basic usage live model success");
         }
 
+        public static void BasicUsageStaticModel(string configPath, string modelPath)
+        {
+            const float outcome = 1.0f;
+            const string eventId = "event_id";
+            const string contextJson = "{\"GUser\":{\"id\":\"a\",\"major\":\"eng\",\"hobby\":\"hiking\"},\"_multi\":[ { \"TAction\":{\"a1\":\"f1\"} },{\"TAction\":{\"a2\":\"f2\"}}]}";
+
+            LiveModel liveModel = Helpers.CreateLiveModelWithStaticModelOrExit(configPath, modelPath);
+
+            ApiStatus apiStatus = new ApiStatus();
+
+            RankingResponse rankingResponse = new RankingResponse();
+            if (!liveModel.TryChooseRank(eventId, contextJson, rankingResponse, apiStatus))
+            {
+                Helpers.WriteStatusAndExit(apiStatus);
+            }
+
+            long actionId;
+            if (!rankingResponse.TryGetChosenAction(out actionId, apiStatus))
+            {
+                Helpers.WriteStatusAndExit(apiStatus);
+            }
+
+            Console.WriteLine($"Chosen action id: {actionId}");
+
+            if (!liveModel.TryQueueOutcomeEvent(eventId, outcome, apiStatus))
+            {
+                Helpers.WriteStatusAndExit(apiStatus);
+            }
+            Console.WriteLine("Basic usage live model success");
+        }
+
         public static void BasicUsageCALoop(string configPath)
         {
             const float outcome = 1.0f;

bindings/cs/rl.net.cli/CommandBase.cs

@@ -7,6 +7,9 @@ public abstract class CommandBase
         [Option(longName: "config", HelpText = "the path to client config", Required = true)]
         public string ConfigPath { get; set; }
 
+        [Option(longName: "model", HelpText = "the path to model file", Required = false)]
+        public string ModelPath { get; set; }
+
         [Option(longName: "slates", HelpText = "Use slates for decisions", Required = false, Default = false)]
         public bool UseSlates { get; set; }
 

bindings/cs/rl.net.cli/Helpers.cs

@@ -1,5 +1,6 @@
 using System;
 using System.IO;
+using System.Collections.Generic;
 
 namespace Rl.Net.Cli
 {
@@ -50,6 +51,55 @@ public static LiveModel CreateLiveModelOrExit(string clientJsonPath)
             return liveModel;
         }
 
+        public static LiveModel CreateLiveModelWithStaticModelOrExit(string clientJsonPath, string modelPath)
+        {
+            if (!File.Exists(clientJsonPath))
+            {
+                WriteErrorAndExit($"Could not find file with path '{clientJsonPath}'.");
+            }
+
+            string json = File.ReadAllText(clientJsonPath);
+
+            ApiStatus apiStatus = new ApiStatus();
+
+            Configuration config;
+            if (!Configuration.TryLoadConfigurationFromJson(json, out config, apiStatus))
+            {
+                WriteStatusAndExit(apiStatus);
+            }
+
+            string trace_log = config["trace.logger.implementation"];
+
+            config["model.source"] = "BINDING_DATA_TRANSPORT";
+            List<byte> modelData = null;
+            if (File.Exists(modelPath))
+            {
+                byte[] fileBytes = File.ReadAllBytes(modelPath);
+                modelData = new List<byte>(fileBytes);
+            }
+            else
+            {
+                WriteErrorAndExit($"Could not find model file with path '{modelPath}'.");
+            }
+
+            // Use static model FactoryContext
+            FactoryContext fc = new FactoryContext(modelData);
+            LiveModel liveModel = new LiveModel(config, fc);
+
+            liveModel.BackgroundError += LiveModel_BackgroundError;
+            if (trace_log == "CONSOLE_TRACE_LOGGER")
+            {
+                liveModel.TraceLoggerEvent += LiveModel_TraceLogEvent;
+            }
+
+            if (!liveModel.TryInit(apiStatus))
+            {
+                WriteStatusAndExit(apiStatus);
+            }
+
+            return liveModel;
+        }
+
         public static LoopType CreateLoopOrExit<LoopType>(string clientJson, Func<Configuration, LoopType> createLoop, bool jsonStr = false) where LoopType : ILoop
         {
             string json = clientJson;

bindings/cs/rl.net.native/CMakeLists.txt

@@ -1,5 +1,6 @@
 set(rl_net_native_SOURCES
   binding_sender.cc
+  binding_static_model.cc
   binding_tracer.cc
   rl.net.api_status.cc
   rl.net.buffer.cc
@@ -22,6 +23,7 @@ set(rl_net_native_SOURCES
 
 set(rl_net_native_HEADERS
   binding_sender.h
+  binding_static_model.h
   binding_tracer.h
   rl.net.api_status.h
   rl.net.loop_context.h

bindings/cs/rl.net.native/binding_static_model.cc

@@ -0,0 +1,11 @@
+#include "binding_static_model.h"
+
+using namespace rl_net_native;
+using namespace reinforcement_learning;
+
+binding_static_model::binding_static_model(const char* vw_model, const size_t len) : vw_model(vw_model), len(len) {}
+
+int binding_static_model::get_data(model_transport::model_data& data, reinforcement_learning::api_status* status)
+{
+  return data.set_data(vw_model, len);
+}

bindings/cs/rl.net.native/binding_static_model.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include "err_constants.h"
+#include "model_mgmt.h"
+
+#include <cstring>
+
+namespace model_transport = reinforcement_learning::model_management;
+
+namespace rl_net_native
+{
+
+namespace constants
+{
+const char* const BINDING_DATA_TRANSPORT = "BINDING_DATA_TRANSPORT";
+}
+class binding_static_model : public model_transport::i_data_transport
+{
+public:
+  binding_static_model(const char* vw_model, const size_t len);
+  int get_data(model_transport::model_data& data, reinforcement_learning::api_status* status = nullptr) override;
+
+private:
+  const char* vw_model;
+  const size_t len;
+};
+}  // namespace rl_net_native

bindings/cs/rl.net.native/rl.net.factory_context.cc

@@ -17,6 +17,40 @@ API factory_context_t* CreateFactoryContext()
   return context;
 }
 
+void cleanup_data_transport_factory(data_transport_factory_t* data_transport_factory)
+{
+  if (data_transport_factory != nullptr && data_transport_factory != &reinforcement_learning::data_transport_factory)
+  {
+    // We overrode the built-in data_transport_factory
+    delete data_transport_factory;
+  }
+}
+
+API factory_context_t* CreateFactoryContextWithStaticModel(const char* vw_model, const size_t len)
+{
+  using namespace reinforcement_learning::model_management;
+  auto context = CreateFactoryContext();
+  char* vw_model_copy = new char[len];
+  memcpy(vw_model_copy, vw_model, len);
+
+  auto data_transport_factory_fn = [vw_model_copy, len](std::unique_ptr<model_management::i_data_transport>& retval,
+                                       const utility::configuration& configuration, i_trace* trace_logger,
+                                       api_status* status) -> int
+  {
+    retval.reset(new rl_net_native::binding_static_model(vw_model_copy, len));
+    return error_code::success;
+  };
+
+  data_transport_factory_t* data_transport_factory =
+      new data_transport_factory_t(reinforcement_learning::data_transport_factory);
+  data_transport_factory->register_type(rl_net_native::constants::BINDING_DATA_TRANSPORT, data_transport_factory_fn);
+
+  std::swap(context->data_transport_factory, data_transport_factory);
+  cleanup_data_transport_factory(data_transport_factory);
+
+  return context;
+}
+
 void cleanup_trace_logger_factory(trace_logger_factory_t* trace_logger_factory)
 {
   if (trace_logger_factory != nullptr && trace_logger_factory != &reinforcement_learning::trace_logger_factory)
@@ -39,6 +73,7 @@ API void DeleteFactoryContext(factory_context_t* context)
 {
   cleanup_trace_logger_factory(context->trace_logger_factory);
   cleanup_sender_factory(context->sender_factory);
+  cleanup_data_transport_factory(context->data_transport_factory);
 
   // TODO: Once we project the others, we will need to add them to cleanup.
 

bindings/cs/rl.net.native/rl.net.factory_context.h

@@ -1,9 +1,13 @@
 #pragma once
 
 #include "binding_sender.h"
+#include "binding_static_model.h"
 #include "factory_resolver.h"
+#include "model_mgmt.h"
 #include "rl.net.native.h"
 
+#include <cstddef>
+
 typedef struct factory_context
 {
   reinforcement_learning::trace_logger_factory_t* trace_logger_factory;
@@ -16,8 +20,8 @@ typedef struct factory_context
 extern "C"
 {
   API factory_context_t* CreateFactoryContext();
+  API factory_context_t* CreateFactoryContextWithStaticModel(const char* vw_model, const size_t len);
   API void DeleteFactoryContext(factory_context_t* context);
-
   API void SetFactoryContextBindingSenderFactory(
       factory_context_t* context, rl_net_native::sender_create_fn create_fn, rl_net_native::sender_vtable_t vtable);
 }

bindings/cs/rl.net/FactoryContext.cs

@@ -1,6 +1,8 @@
 using System;
 using System.Threading;
 using System.Runtime.InteropServices;
+using System.Collections.Generic;
+using System.Linq;
 
 using Rl.Net.Native;
 
@@ -10,6 +12,9 @@ public sealed class FactoryContext : NativeObject<FactoryContext>
         [DllImport("rlnetnative")]
         private static extern IntPtr CreateFactoryContext();
 
+        [DllImport("rlnetnative")]
+        private static extern IntPtr CreateFactoryContextWithStaticModel(IntPtr vw_model, int len);
+
         [DllImport("rlnetnative")]
         private static extern void DeleteFactoryContext(IntPtr context);
 
@@ -20,6 +25,23 @@ public sealed class FactoryContext : NativeObject<FactoryContext>
         {
         }
 
+        public FactoryContext(IEnumerable<byte> vwModelEnumerable) : base(
+            new New<FactoryContext>(() => {
+                var vwModelArray = vwModelEnumerable.ToArray();
+                GCHandle handle = GCHandle.Alloc(vwModelArray, GCHandleType.Pinned);
+                try {
+                    IntPtr ptr = handle.AddrOfPinnedObject();
+                    return CreateFactoryContextWithStaticModel(ptr, vwModelArray.Length);
+                }
+                finally {
+                    if (handle.IsAllocated)
+                        handle.Free();
+                }
+            }),
+            new Delete<FactoryContext>(DeleteFactoryContext))
+        {
+        }
+
         private GCHandleLifetime registeredSenderCreateHandle;
 
         public void SetSenderFactory<TSender>(Func<IReadOnlyConfiguration, ErrorCallback, TSender> createSender) where TSender : ISender

bindings/cs/rl.net/LiveModel.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Runtime.InteropServices;
+using System.Collections.Generic;
 
 using Rl.Net.Native;
 

include/errors_data.h

@@ -54,4 +54,5 @@ ERROR_CODE_DEFINITION(48, extension_error, "Error from extension: ")
 ERROR_CODE_DEFINITION(49, baseline_actions_not_defined, "Baseline Actions must be defined in apprentice mode")
 ERROR_CODE_DEFINITION(50, http_api_key_not_provided, "Http api key must be provided")
 ERROR_CODE_DEFINITION(51, http_model_uri_not_provided, "Model Blob URI parameter was not passed in via configuration")
+ERROR_CODE_DEFINITION(52, static_model_load_error, "Static model passed in C# layer is not loading properly")
 //! [Error Definitions]

include/model_mgmt.h

@@ -1,8 +1,10 @@
 #pragma once
+#include "err_constants.h"
 #include "multistep.h"
 
 #include <cstddef>
 #include <cstdint>
+#include <cstring>
 #include <string>
 #include <utility>
 #include <vector>
@@ -34,6 +36,9 @@ class model_data
   char* alloc(size_t desired);
   void free();
 
+  // Set data
+  int set_data(const char* vw_model, size_t len);
+
   model_data() = default;
   ~model_data() = default;
 

rlclientlib/model_mgmt/model_mgmt.cc

@@ -25,5 +25,18 @@ char* model_data::alloc(const size_t desired)
 
 void model_data::free() { _data.clear(); }
 
+int model_data::set_data(const char* vw_model, size_t len)
+{
+  if (vw_model == nullptr || len == 0) { return reinforcement_learning::error_code::static_model_load_error; }
+
+  char* buffer = this->alloc(len);
+  if (buffer == nullptr) { return reinforcement_learning::error_code::static_model_load_error; }
+
+  memcpy(buffer, vw_model, len);
+  this->data_sz(len);
+
+  return reinforcement_learning::error_code::success;
+}
+
 }  // namespace model_management
 }  // namespace reinforcement_learning