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通过OpenTelemetry接入Unreal Engine Trace数据

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本文介绍如何在Unreal Engine（UE）中集成OpenTelemetry C++ SDK以采集引擎的Trace数据。

前提条件

  • 已创建Trace实例。具体操作，请参见创建Trace实例。

  • 已准备相关的开发环境，该环境需要支持编译和运行OpenTelemetry C++ SDK。

    • 如果您使用的是CMake编译器，则其版本需为3.1及以上（建议）。

    • 如果您使用的是GCC或G++编译器，则其版本需要为4.8及以上。

    • 如果您使用的是MSVC，则其版本需要为VS2015及以上（建议为VS2019）。

  • 支持的C++版本如下所示。

    • ISO/IEC 14882:2011（C++11, C++0x）

    • ISO/IEC 14882:2014（C++14, C++1y）

    • ISO/IEC 14882:2017（C++17, C++1z）

    • ISO/IEC 14882:2020（C++20）

  • 已安装Git版本控制工具。

  • 更多依赖及版本信息，请参见opentelemetry-cpp。

步骤一：配置Visual Studio

修改Visual Studio的配置。关于修改Visual Studio工作负荷和组件的具体操作，请参见修改Visual Studio。

  1. 在工作负荷页签中，选中使用 C++ 的桌面开发和使用 C++ 的游戏开发这两个工作负荷，如下图所示。imageimage

  2. 在单个组件页签中，选中.Net Framework 4.8 SDK和.NET Core 3.1 Runtime，如下图所示。image

步骤二：获取OpenTelemetry C++ SDK二进制文件

目前，您可以通过如下两种方式获取OpenTelemetry C++ SDK的二进制文件。

  • 通过OpenTelemetry C++源码进行编译与构建二进制文件。

    推荐您使用该方式，以便OpenTelemetry C++ SDK能够与您的项目完全兼容。

  • 通过vcpkg包管理器获取二进制文件。

（推荐）通过OpenTelemetry C++源码进行编译与构建二进制文件

OpenTelemetry C++ SDK的CMake文件提供多个入参，方便您在编译时进行配置。您可以参考以下配置，进行构建。

说明

OpenTelemetry C++ SDK的源码版本是v1.9.0。

  1. 创建CMake配置。

    $ cmake .. -T"v142" `
$ -DCMAKE_INSTALL_PREFIX=./out `
$ -DWITH_EXAMPLES:BOOL=OFF `
$ -DWITH_OTLP:BOOL=ON `
$ -DWITH_OTLP_GRPC:BOOL=ON `
$ -DWITH_OTLP_HTTP:BOOL=ON `
$ -DWITH_STL:BOOL=ON `
$ -Dc-ares_DIR:PATH=<your c-ares path> `
$ -Dre2_DIR:PATH=<your re2 path> `
$ -DgRPC_DIR:PATH=<your gRPC path> `
$ -Dabsl_DIR:PATH=<your absl path> 
$ -DWITH_ABSEIL:BOOL=ON `
$ -Dnlohmann_json_DIR:PATH=<your nlohmann_json path> `
$ -DCURL_DIR:PATH=<your curl path> `
$ -DOPENSSL_ROOT_DIR:PATH=<your openssl path> `
$ -DOPENSSL_USE_STATIC_LIBS:BOOL=ON ` //建议
$ -DProtobuf_DIR:PATH=<your proto path> `
$ -DProtobuf_PROTOC_EXECUTABLE:FILEPATH=<your protoc exe filepath> `
$ -DPROTO_INCLUDE_DIR:FILEPATH=<your proto filepath> `
$ -DCMAKE_CXX_FLAGS=D_HAS_EXCEPTIONS=0 `
$ -DgRPC_CPP_PLUGIN_EXECUTABLE:FILEPATH=<your grpc plugin exe filepath> `
$ -DgRPC_ZLIB_PROVIDER=package `
$ -DZLIB_ROOT=<your zlib install path> `
$ -DZLIB_USE_STATIC_LIBS=True `
$ -DZLIB_LIBRARY_RELEASE=<your zlib release lib path> `
$ -DZLIB_LIBRARY_DEBUG=<your zlib debug lib path>

    其中，模块列表如下表所示。

    依赖项

    版本Tag

    zlib

    v1.2.13

    openssl

    1_1_1t

    cares

    1_19_0

    curl

    7_88_1

    nlohmann

    v3.11.2

    utf8_range

    main

    abseil

    20230125.2

    protobuf

    v21.12

    re2

    2022-12-01

    grpc

    v1.52.1

  2. 构建CMake目标。

    $ cmake --build . --config Release -j

  3. 安装API头文件。

    $ cmake --install .

执行以上命令成功后，构建产物将被打包在CMAKE_INSTALL_PREFIX指定的文件夹中。目录说明，如下所示。

重要

在创建UE插件时，您需要复制此处的文件。

  • bin/目录：包含动态链接库（.dll文件）。

  • lib/目录：包含静态链接库文件（.lib文件）。

  • include/目录：包含头文件（.h文件）。

关于OpenTelemetry C++ SDK编译构建的更多信息，请参见Building opentelemetry-cpp。

通过vcpkg包管理器获取二进制文件

重要

从vcpkg包获取到的SDK二进制文件，可能与您的项目存在兼容性问题，建议您充分测试后再使用。更多信息，请参见using-package-managers。

  1. 在您的工作目录中，打开一个command prompt或者terminal。

  2. 使用Git克隆vcpkg包。

    $ git clone https://github.com/microsoft/vcpkg

  3. 执行bootstrap-vcpkg.bat脚本，如下图所示。

    $ .\vcpkg\bootstrap-vcpkg.bat
    image

  4. 进入到vcpkg目录，并执行以下脚本内容。 

    $ .\vcpkg.exe install opentelemetry-cpp[otlp-http]:x64-windows --recurse

执行以上命令成功后，OpenTelemetry C++ SDK以及对应的依赖SDK将被安装到vcpkg/installed/x64-winddows目录下。目录说明，如下所示。

重要

在创建UE插件时，您需要复制此处的文件。

  • bin/目录：包含动态链接库（.dll文件）。

  • lib/目录：包含静态链接库文件（.lib文件）。

  • include/目录：包含头文件（.h文件）。

步骤三：使用OpenTelemetry C++ SDK创建UE插件

将OpenTelemetry C++ SDK集成到UE插件模块中。UE插件模块可以包含源代码或外部依赖项。

准备工作

在创建前，需先确认您的UE项目是C++项目，而不是蓝图（Blueprint-only）项目。您可以在使用Unreal Editor创建项目时进行指定，如下图所示。

本示例中，项目名称为UEExampleProject。您需要按照您项目的实际名称进行配置。

image

新建插件

  1. 打开您的UE项目。

  2. 在页面左上角，选择编辑 > 插件。

  3. 在插件管理面板，单击新插件。

  4. 单击空白。image

  5. 配置插件名称。

    您可以自定义插件名称（例如OTelPlugin），但需确保其唯一性。

  6. 单击创建插件。

    创建插件后，系统会在工程的Plugins目录下创建OTelPlugin目录。

    重要

    如果Plugins目录下无OTelPlugin目录，说明您的项目是一个蓝图（Blueprint-only）项目，或者您创建的插件类型为纯内容（content-only），请对项目类型以及插件类型进行再次确认。

  7. 打开UEExampleProject/OTelPlugin/Source目录，完成如下操作。

    1. 在当前目录下，新增OTelSDK文件夹。

    2. 在OTelSDK文件夹内，新增include文件夹、lib文件夹及OTelSDK.Build.cs文件，如下图所示。image

    3. 将步骤二中生成的include文件夹中的头文件（.h 文件）复制到您在步骤7中所创建的include文件夹中，如下图所示。image

    4. 将步骤二中生成的bin/和lib/文件夹中的静态及动态链接库文件（.lib和.dll文件）复制到您在步骤7中所创建的lib文件夹下的平台文件夹中，如下图所示。image

    5. 配置OTel.Build.cs文件，示例如下所示。 

      using System;
using System.IO;
using UnrealBuildTool;

public class OTelSDK : ModuleRules {

    public OTelSDK(ReadOnlyTargetRules Target) : base(Target) {
		Type = ModuleType.External;
		CppStandard = CppStandardVersion.Cpp17;

		// OpenTelemetry is built with STL support.
		// This convinces the headers of this fact.
		PublicDefinitions.Add("HAVE_CPP_STDLIB=1");

		// include path is public for the module. Can it be private and 
		// still be used by other modules of the same plugin?
		PublicIncludePaths.Add(Path.Combine(ModuleDirectory, "include"));

		// configure link libraries. This basically makes it windows x64 only
		string LibrariesPath = Path.Combine(ModuleDirectory, "lib", "Win64");
		
    // OpenTelemetry
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_common.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_exporter_in_memory.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_exporter_ostream_span.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_exporter_otlp_grpc.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_exporter_otlp_grpc_client.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_exporter_otlp_grpc_log.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_exporter_otlp_grpc_metrics.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_exporter_otlp_http.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_exporter_otlp_http_client.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_exporter_otlp_http_metric.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_metrics.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_http_client_curl.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_otlp_recordable.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_proto.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_resources.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_trace.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "opentelemetry_version.lib"));

		// Abseil.
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_bad_any_cast_impl.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_bad_optional_access.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_bad_variant_access.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_base.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_city.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_civil_time.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_cord.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_cord_internal.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_cordz_functions.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_cordz_handle.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_cordz_info.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_cordz_sample_token.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_crc_cord_state.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_crc_cpu_detect.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_crc_internal.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_crc32c.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_debugging_internal.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_demangle_internal.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_examine_stack.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_exponential_biased.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_graphcycles_internal.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_hash.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_low_level_hash.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_hashtablez_sampler.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_int128.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_malloc_internal.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_raw_hash_set.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_raw_logging_internal.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_random_distributions.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_random_internal_platform.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_random_internal_pool_urbg.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_random_internal_randen.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_random_internal_randen_hwaes.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_random_internal_randen_hwaes_impl.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_random_internal_randen_slow.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_random_internal_seed_material.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_random_seed_gen_exception.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_scoped_set_env.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_spinlock_wait.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_stacktrace.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_status.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_statusor.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_strerror.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_strings.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_strings_internal.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_str_format_internal.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_symbolize.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_synchronization.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_throw_delegate.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_time.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "absl_time_zone.lib"));

		// OpenSSL
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "libcrypto.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "libssl.lib"));
		PublicSystemLibraries.Add("crypt32.lib");   // indirect dependencies coming in via OpenSSL. Windows only.
		PublicSystemLibraries.Add("Wldap32.lib");

		// GRPC
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "address_sorting.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "cares.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "gpr.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "grpc++.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "grpc++_alts.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "grpc++_error_details.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "grpc++_reflection.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "grpc++_unsecure.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "grpc.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "grpcpp_channelz.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "grpc_plugin_support.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "grpc_unsecure.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "grpc_authorization_provider.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "re2.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "upb.lib"));

		// Protobuf
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "libprotobuf.lib"));

		// utf8-range
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "utf8_range.lib"));
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "utf8_validity.lib"));
		
		// CURL
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "libcurl.lib"));

		// Crc32c
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "crc32c.lib"));

		// ZLib
		PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "zlibstatic.lib"));
	}
}

配置项目

  1. 打开UEExampleProject.Build.cs文件，路径如下图所示。image

  2. 在UEExampleProject.Build.cs文件中，导入您已创建的OTelSDK模块，作为依赖。

    PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;

CppStandard = CppStandardVersion.Cpp17;
PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "OTelSDK" });

  3. 返回您项目的根目录，右键单击UEExampleProject.uproject文件，然后单击Generate Visual Studio project files。

  4. 重新打开您的项目，Visual Studio会自动重新加载您的项目。

步骤四：验证插件

在包含OTelSDK插件模块作为依赖项的任何模块中，创建一个新的C++ Actor。

  1. 在内容浏览器中，创建一个C++类。image

  2. 单击Actor。image

  3. 设置Actor名称，然后选择目标模块。image

  4. 在MyActor.cpp文件中完成如下配置。

    // Fill out your copyright notice in the Description page of Project Settings.

#include "MyActor.h"
#pragma once

#include "opentelemetry/exporters/ostream/span_exporter_factory.h"
#include "opentelemetry/exporters/otlp/otlp_http.h"
#include "opentelemetry/exporters/otlp/otlp_http_exporter_factory.h"
#include "opentelemetry/exporters/otlp/otlp_http_exporter_options.h"
#include "opentelemetry/sdk/trace/simple_processor_factory.h"
#include "opentelemetry/sdk/trace/tracer_provider_factory.h"
#include "opentelemetry/trace/provider.h"
#include "opentelemetry/sdk/trace/tracer_provider.h"

#include "opentelemetry/sdk/version/version.h"
#include "opentelemetry/trace/provider.h"
#include "opentelemetry/sdk/resource/resource.h"
#include "opentelemetry/sdk/resource/semantic_conventions.h"

#include "opentelemetry/sdk/common/global_log_handler.h"

class CustomLogHandler : public opentelemetry::sdk::common::internal_log::LogHandler
{
public:
    void Handle(opentelemetry::sdk::common::internal_log::LogLevel level,
        const char*,
        int,
        const char* msg,
        const opentelemetry::sdk::common::AttributeMap& attrs) noexcept override
    {
        UE_LOG(LogTemp, Log, TEXT("%s"), *FString(msg));
    }
};

namespace trace = opentelemetry::trace;
namespace trace_sdk = opentelemetry::sdk::trace;
namespace otlp = opentelemetry::exporter::otlp;
namespace trace_exporter = opentelemetry::exporter::trace;
namespace resource = opentelemetry::sdk::resource;

namespace
{
    opentelemetry::exporter::otlp::OtlpHttpExporterOptions opts;
    void InitTracer()
    {
        // custome log handler
        using opentelemetry::sdk::common::internal_log::LogHandler;
        auto custom_log_handler = opentelemetry::nostd::shared_ptr<LogHandler>(new CustomLogHandler{});
        opentelemetry::sdk::common::internal_log::GlobalLogHandler::SetLogHandler(custom_log_handler);
        opentelemetry::sdk::common::internal_log::GlobalLogHandler::SetLogLevel(opentelemetry::sdk::common::internal_log::LogLevel::Debug);

        opts.url = "https://<your project>.<your endpoint>/opentelemetry/v1/traces";
        opts.console_debug = true;
        opts.content_type = otlp::HttpRequestContentType::kBinary;
        // Setup credentials info
        opts.http_headers.insert(std::pair<std::string, std::string>("x-sls-otel-project", "<your project>"));
        opts.http_headers.insert(std::pair<std::string, std::string>("x-sls-otel-instance-id", "<your instance id>"));
        opts.http_headers.insert(std::pair<std::string, std::string>("x-sls-otel-ak-id", "<your accesskey id>"));
        opts.http_headers.insert(std::pair<std::string, std::string>("x-sls-otel-ak-secret", "<your accesskey secret>"));

        // Create OTLP exporter instance
        auto exporter = otlp::OtlpHttpExporterFactory::Create(opts);
        //auto exporter = trace_exporter::OStreamSpanExporterFactory::Create();
        auto processor = trace_sdk::SimpleSpanProcessorFactory::Create(std::move(exporter));

        resource::ResourceAttributes attributes = {
          {resource::SemanticConventions::kServiceName, "MyActor"},
          {resource::SemanticConventions::kServiceNamespace, "UE Games"},
          {resource::SemanticConventions::kServiceVersion, "1.0.0"},
          {resource::SemanticConventions::kHostName, "Win64"},
          {resource::SemanticConventions::kDeploymentEnvironment, "dev"}
        };
        auto resource = opentelemetry::sdk::resource::Resource::Create(attributes);

        std::shared_ptr<opentelemetry::trace::TracerProvider> provider =
            trace_sdk::TracerProviderFactory::Create(std::move(processor), std::move(resource));
        // Set the global trace provider
        trace::Provider::SetTracerProvider(provider);
    }

    void CleanupTracer()
    {
        // We call ForceFlush to prevent to cancel running exportings, It's optional.
        opentelemetry::nostd::shared_ptr<opentelemetry::trace::TracerProvider> provider =
            trace::Provider::GetTracerProvider();
        if (provider)
        {
            static_cast<trace_sdk::TracerProvider*>(provider.get())->ForceFlush();
        }

        std::shared_ptr<opentelemetry::trace::TracerProvider> none;
        trace::Provider::SetTracerProvider(none);
    }
}  // namespace

namespace trace = opentelemetry::trace;
namespace nostd = opentelemetry::nostd;

namespace
{
    nostd::shared_ptr<trace::Tracer> get_tracer()
    {
        auto provider = trace::Provider::GetTracerProvider();
        return provider->GetTracer("foo_library", OPENTELEMETRY_SDK_VERSION);
    }

    void basic_f1()
    {
        auto span = get_tracer()->StartSpan("basic_f1");
        // do your stuff
        // ...
        span->End();
    }

    void basic_f1_with_attributes()
    {
        auto span = get_tracer()->StartSpan("basic_f1_with_attributes");
        span->SetAttribute("ags", 12);
        span->SetAttribute("sex", "man");
        span->SetAttribute("height", 154.5);


        span->AddEvent("message: success");

        span->SetStatus(trace::StatusCode::kError);

        span->End();
    }

    void basic_active_f1()
    {
        auto span_child = get_tracer()->StartSpan("operation B");
        // do your stuff
        // ...
        span_child->End();
    }

    void basic_active()
    {
        auto span = get_tracer()->StartSpan("operation A");
        auto scope = get_tracer()->WithActiveSpan(span);

        basic_active_f1();

        span->End();
    }


    void f1()
    {
        auto scoped_span = trace::Scope(get_tracer()->StartSpan("f1"));
    }

    void f2()
    {
        auto scoped_span = trace::Scope(get_tracer()->StartSpan("f2"));

        f1();
        f1();
    }
}  // namespace

void foo_library()
{

    basic_f1();
    basic_active();
    basic_f1_with_attributes();

    auto scoped_span = trace::Scope(get_tracer()->StartSpan("library"));

    f2();

}

// Sets default values
AMyActor::AMyActor()
{
    // Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
    PrimaryActorTick.bCanEverTick = true;
    UE_LOG(LogTemp, Log, TEXT("debuggg ---  AMyActor  ---"));
    InitTracer();
    foo_library();
}

// Called when the game starts or when spawned
void AMyActor::BeginPlay()
{
    Super::BeginPlay();
    UE_LOG(LogTemp, Log, TEXT("debuggg ---  BeginPlay ---"));

    foo_library();

    //CleanupTracer();

}

// Called every frame
void AMyActor::Tick(float DeltaTime)
{
    Super::Tick(DeltaTime);

}

    变量说明如下表所示。关于OpenTelemetry C++ SDK的更多信息，请参见步骤三：使用SDK以及OpenTelemetry C++ SDK。

    参数

    说明

    示例

    <your endpoint>

    日志服务Project所在地域的访问域名，支持公网和阿里云内网（经典网络、VPC）。更多信息，请参见服务入口。

    重要

    此处无需添加https://前缀。

    cn-hangzhou.log.aliyuncs.com

    <your project>

    日志服务Project名称。

    sls-ue-demo

    <your instance id>

    Trace服务实例ID。更多信息，请参见创建Trace实例。

    ue-traces

    <your accesskey id>

    阿里云账号AccessKey ID。

    重要

    建议您使用只具备日志服务Project写入权限的RAM用户的AccessKey（包括AccessKey ID和AccessKey Secret）。授予RAM用户向指定Project写入数据权限的具体操作，请参见授权。如何获取AccessKey的具体操作，请参见访问密钥。

    无

    <your accesskey secret>

    阿里云账号AccessKey Secret。

    重要

    建议您使用只具备日志服务Project写入权限的RAM用户的AccessKey。

    无

  5. 将Actor拖拽到关卡窗口视图中，然后单击运行。image

  6. 在日志服务控制台的Trace服务应用中，查看Trace数据。

    添加过滤条件 service : "MyActor" ，查看已接入的UE Trace数据。image

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