Hi,
I am currently working on a plugin for UE4 and I have hit a bit of a road block. Everything appears to be setup correctly for loading a external library and using dll’s but I cant seem to get it to compile once I have added a function to my third party component. Any and all help would be appreciated. Basing my plugin off ASP.NET’s SignalR C++ client (GitHub - aspnet/SignalR-Client-Cpp: C++ Client for ASP.NET Core SignalR). Log and some code refs are here. Thank you.
Link to source
https://drive.google.com/file/d/0B56iW1OqxRqBR2NxVEVPalJvSm8/view?usp=sharing
hub_connection.h
// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
#pragma once
#include "_exports.h"
#include <memory>
#include <functional>
#include "pplxtasks.h"
#include "json.h"
#include "connection_state.h"
#include "trace_level.h"
#include "log_writer.h"
#include "hub_proxy.h"
namespace signalr
{
class hub_connection_impl;
class hub_connection
{
public:
SIGNALR_API explicit hub_connection(const utility::string_t& url, const utility::string_t& query_string = U(""),
trace_level trace_level = trace_level::all, std::shared_ptr<log_writer> log_writer = nullptr, bool use_default_url = true);
SIGNALR_API ~hub_connection();
hub_connection(const hub_connection&) = delete;
hub_connection& operator=(const hub_connection&) = delete;
SIGNALR_API pplx::task<void> __cdecl start();
SIGNALR_API pplx::task<void> __cdecl stop();
SIGNALR_API hub_proxy __cdecl create_hub_proxy(const utility::string_t& hub_name);
SIGNALR_API connection_state __cdecl get_connection_state() const;
SIGNALR_API void __cdecl set_reconnecting(const std::function<void __cdecl()>& reconnecting_callback);
SIGNALR_API void __cdecl set_reconnected(const std::function<void __cdecl()>& reconnected_callback);
SIGNALR_API void __cdecl set_disconnected(const std::function<void __cdecl()>& disconnected_callback);
SIGNALR_API void __cdecl set_headers(const std::unordered_map<utility::string_t, utility::string_t>& headers);
private:
std::shared_ptr<hub_connection_impl> m_pImpl;
pplx::task<web::json::value> invoke_json(const utility::string_t& hub_name, const utility::string_t& method_name, const web::json::value& arguments,
const std::function<void(const web::json::value&)>& on_progress);
};
}
SignalRClientComponent.h
// Fill out your copyright notice in the Description page of Project Settings.
#pragma once
#include "Components/ActorComponent.h"
#include "hub_connection.h"
#include "SignalRClientComponent.generated.h"
UCLASS( ClassGroup=("Networking"), meta=(BlueprintSpawnableComponent) )
class SIGNALRCLIENT_API USignalRClientComponent : public UActorComponent
{
GENERATED_BODY()
public:
// Sets default values for this component's properties
USignalRClientComponent();
// Called when the game starts
virtual void BeginPlay() override;
// Called every frame
virtual void TickComponent( float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction ) override;
UFUNCTION(BlueprintCallable, Category = "SignalR Functions")
void Connect();
//void Connect(const FString& InAddressAndPort);
};
SignalRClient.Build.cs
// Copyright 1998-2016 Epic Games, Inc. All Rights Reserved.
using System.IO;
namespace UnrealBuildTool.Rules
{
public class SignalRClient : ModuleRules
{
private string ThirdPartyPath
{
get { return Path.GetFullPath(Path.Combine(ModuleDirectory, "../../ThirdParty/")); }
}
private string SignalRClientThirdParty
{
get { return Path.GetFullPath(Path.Combine(ThirdPartyPath, "SignalRCppClient")); }
}
public bool LoadLib(TargetInfo Target)
{
bool isLibrarySupported = false;
if ((Target.Platform == UnrealTargetPlatform.Win64) || (Target.Platform == UnrealTargetPlatform.Win32))
{
isLibrarySupported = true;
string PlatformString = (Target.Platform == UnrealTargetPlatform.Win64) ? "Win64" : "Win32";
string SignalRLibPath = Path.Combine(SignalRClientThirdParty, "Libraries");
PublicAdditionalLibraries.Add(Path.Combine(SignalRLibPath, PlatformString, "signalrclient.lib"));
}
return isLibrarySupported;
}
public SignalRClient(TargetInfo Target)
{
UEBuildConfiguration.bForceEnableExceptions = true;
PublicIncludePaths.AddRange(
new string] {
"SignalRClient/Public",
Path.Combine(SignalRClientThirdParty, "Includes")
// ... add public include paths required here ...
}
);
PrivateIncludePaths.AddRange(
new string] {
"SignalRClient/Private",
// ... add other private include paths required here ...
}
);
PublicDependencyModuleNames.AddRange(
new string]
{
"Core",
"Json",
"JsonUtilities",
"SignalRClient"
// ... add other public dependencies that you statically link with here ...
}
);
PrivateDependencyModuleNames.AddRange(
new string]
{
"CoreUObject",
"Engine",
"Slate",
"SlateCore",
"SignalRClient"
// ... add private dependencies that you statically link with here ...
}
);
DynamicallyLoadedModuleNames.AddRange(
new string]
{
// ... add any modules that your module loads dynamically here ...
}
);
LoadLib(Target);
}
}
}
SignalRClient.h
// Copyright 1998-2016 Epic Games, Inc. All Rights Reserved.
#include "SignalRClientPrivatePCH.h"
class SIGNALRCLIENT_API FSignalRClient : public ISignalRClient
{
/** IModuleInterface implementation*/
virtual void StartupModule() override;
virtual void ShutdownModule() override;
};
void FSignalRClient::StartupModule()
{
// This code will execute after your module is loaded into memory (but after global variables are initialized, of course.)
}
void FSignalRClient::ShutdownModule()
{
// This function may be called during shutdown to clean up your module. For modules that support dynamic reloading,
// we call this function before unloading the module.
}
IMPLEMENT_MODULE(FSignalRClient, SignalRClient)