1 files changed, 354 insertions, 0 deletions
diff --git a/src/zennomad/nomadprocess.cpp b/src/zennomad/nomadprocess.cpp
new file mode 100644
index 000000000..1ae968fb7
--- /dev/null
+++ b/src/zennomad/nomadprocess.cpp
@@ -0,0 +1,354 @@
+// Copyright Epic Games, Inc. All Rights Reserved.
+
+#include <zennomad/nomadclient.h>
+#include <zennomad/nomadprocess.h>
+
+#include <zenbase/zenbase.h>
+#include <zencore/fmtutils.h>
+#include <zencore/iobuffer.h>
+#include <zencore/logging.h>
+#include <zencore/memoryview.h>
+#include <zencore/process.h>
+#include <zencore/timer.h>
+#include <zencore/trace.h>
+
+ZEN_THIRD_PARTY_INCLUDES_START
+#include <json11.hpp>
+ZEN_THIRD_PARTY_INCLUDES_END
+
+#include <fmt/format.h>
+
+namespace zen::nomad {
+
+//////////////////////////////////////////////////////////////////////////
+
+struct NomadProcess::Impl
+{
+	Impl(std::string_view BaseUri) : m_HttpClient(BaseUri) {}
+	~Impl() = default;
+
+	void SpawnNomadAgent()
+	{
+		ZEN_TRACE_CPU("SpawnNomadAgent");
+
+		if (m_ProcessHandle.IsValid())
+		{
+			return;
+		}
+
+		CreateProcOptions Options;
+		Options.Flags |= CreateProcOptions::Flag_Windows_NewProcessGroup;
+
+		CreateProcResult Result = CreateProc("nomad" ZEN_EXE_SUFFIX_LITERAL, "nomad" ZEN_EXE_SUFFIX_LITERAL " agent -dev", Options);
+
+		if (Result)
+		{
+			m_ProcessHandle.Initialize(Result);
+
+			Stopwatch Timer;
+
+			// Poll to check when the agent is ready
+
+			do
+			{
+				Sleep(100);
+				HttpClient::Response Resp = m_HttpClient.Get("v1/status/leader");
+				if (Resp)
+				{
+					ZEN_INFO("Nomad agent started successfully (waited {})", NiceTimeSpanMs(Timer.GetElapsedTimeMs()));
+
+					return;
+				}
+			} while (Timer.GetElapsedTimeMs() < 30000);
+		}
+
+		// Report failure!
+
+		ZEN_WARN("Nomad agent failed to start within timeout period");
+	}
+
+	void StopNomadAgent()
+	{
+		if (!m_ProcessHandle.IsValid())
+		{
+			return;
+		}
+
+		// This waits for the process to exit and also resets the handle
+		m_ProcessHandle.Kill();
+	}
+
+private:
+	ProcessHandle m_ProcessHandle;
+	HttpClient	  m_HttpClient;
+};
+
+NomadProcess::NomadProcess() : m_Impl(std::make_unique<Impl>("http://localhost:4646/"))
+{
+}
+
+NomadProcess::~NomadProcess()
+{
+}
+
+void
+NomadProcess::SpawnNomadAgent()
+{
+	m_Impl->SpawnNomadAgent();
+}
+
+void
+NomadProcess::StopNomadAgent()
+{
+	m_Impl->StopNomadAgent();
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+NomadTestClient::NomadTestClient(std::string_view BaseUri) : m_HttpClient(BaseUri)
+{
+}
+
+NomadTestClient::~NomadTestClient()
+{
+}
+
+NomadJobInfo
+NomadTestClient::SubmitJob(std::string_view JobId, std::string_view Command, const std::vector<std::string>& Args)
+{
+	ZEN_TRACE_CPU("SubmitNomadJob");
+
+	NomadJobInfo Result;
+
+	// Build the job JSON for a raw_exec batch job
+	json11::Json::object TaskConfig;
+	TaskConfig["command"] = std::string(Command);
+
+	json11::Json::array JsonArgs;
+	for (const auto& Arg : Args)
+	{
+		JsonArgs.push_back(Arg);
+	}
+	TaskConfig["args"] = JsonArgs;
+
+	json11::Json::object Resources;
+	Resources["CPU"]	  = 100;
+	Resources["MemoryMB"] = 64;
+
+	json11::Json::object Task;
+	Task["Name"]	  = "test-task";
+	Task["Driver"]	  = "raw_exec";
+	Task["Config"]	  = TaskConfig;
+	Task["Resources"] = Resources;
+
+	json11::Json::array Tasks;
+	Tasks.push_back(Task);
+
+	json11::Json::object Group;
+	Group["Name"]  = "test-group";
+	Group["Count"] = 1;
+	Group["Tasks"] = Tasks;
+
+	json11::Json::array Groups;
+	Groups.push_back(Group);
+
+	json11::Json::array Datacenters;
+	Datacenters.push_back("dc1");
+
+	json11::Json::object Job;
+	Job["ID"]		   = std::string(JobId);
+	Job["Name"]		   = std::string(JobId);
+	Job["Type"]		   = "batch";
+	Job["Datacenters"] = Datacenters;
+	Job["TaskGroups"]  = Groups;
+
+	json11::Json::object Root;
+	Root["Job"] = Job;
+
+	std::string Body = json11::Json(Root).dump();
+
+	IoBuffer Payload = IoBufferBuilder::MakeFromMemory(MemoryView{Body.data(), Body.size()}, ZenContentType::kJSON);
+
+	HttpClient::Response Response =
+		m_HttpClient.Put("v1/jobs", Payload, {{"Content-Type", "application/json"}, {"Accept", "application/json"}});
+
+	if (!Response || !Response.IsSuccess())
+	{
+		ZEN_WARN("NomadTestClient: SubmitJob failed for '{}'", JobId);
+		return Result;
+	}
+
+	std::string		   ResponseBody(Response.AsText());
+	std::string		   Err;
+	const json11::Json Json = json11::Json::parse(ResponseBody, Err);
+
+	if (!Err.empty())
+	{
+		ZEN_WARN("NomadTestClient: invalid JSON in SubmitJob response: {}", Err);
+		return Result;
+	}
+
+	Result.Id	  = std::string(JobId);
+	Result.Status = "pending";
+
+	ZEN_INFO("NomadTestClient: job '{}' submitted (eval_id={})", JobId, Json["EvalID"].string_value());
+
+	return Result;
+}
+
+NomadJobInfo
+NomadTestClient::GetJobStatus(std::string_view JobId)
+{
+	ZEN_TRACE_CPU("GetNomadJobStatus");
+
+	NomadJobInfo Result;
+
+	HttpClient::Response Response = m_HttpClient.Get(fmt::format("v1/job/{}", JobId));
+
+	if (Response.Error)
+	{
+		ZEN_WARN("NomadTestClient: GetJobStatus failed for '{}': {}", JobId, Response.Error->ErrorMessage);
+		return Result;
+	}
+
+	if (static_cast<int>(Response.StatusCode) == 404)
+	{
+		Result.Status = "dead";
+		return Result;
+	}
+
+	if (!Response.IsSuccess())
+	{
+		ZEN_WARN("NomadTestClient: GetJobStatus failed with HTTP/{}", static_cast<int>(Response.StatusCode));
+		return Result;
+	}
+
+	std::string		   Body(Response.AsText());
+	std::string		   Err;
+	const json11::Json Json = json11::Json::parse(Body, Err);
+
+	if (!Err.empty())
+	{
+		ZEN_WARN("NomadTestClient: invalid JSON in GetJobStatus response: {}", Err);
+		return Result;
+	}
+
+	Result.Id	  = Json["ID"].string_value();
+	Result.Status = Json["Status"].string_value();
+	if (const json11::Json Desc = Json["StatusDescription"]; Desc.is_string())
+	{
+		Result.StatusDescription = Desc.string_value();
+	}
+
+	return Result;
+}
+
+void
+NomadTestClient::StopJob(std::string_view JobId)
+{
+	ZEN_TRACE_CPU("StopNomadJob");
+
+	HttpClient::Response Response = m_HttpClient.Delete(fmt::format("v1/job/{}", JobId));
+
+	if (!Response || !Response.IsSuccess())
+	{
+		ZEN_WARN("NomadTestClient: StopJob failed for '{}'", JobId);
+		return;
+	}
+
+	ZEN_INFO("NomadTestClient: job '{}' stopped", JobId);
+}
+
+std::vector<NomadAllocInfo>
+NomadTestClient::GetAllocations(std::string_view JobId)
+{
+	ZEN_TRACE_CPU("GetNomadAllocations");
+
+	std::vector<NomadAllocInfo> Allocs;
+
+	HttpClient::Response Response = m_HttpClient.Get(fmt::format("v1/job/{}/allocations", JobId));
+
+	if (!Response || !Response.IsSuccess())
+	{
+		ZEN_WARN("NomadTestClient: GetAllocations failed for '{}'", JobId);
+		return Allocs;
+	}
+
+	std::string		   Body(Response.AsText());
+	std::string		   Err;
+	const json11::Json Json = json11::Json::parse(Body, Err);
+
+	if (!Err.empty() || !Json.is_array())
+	{
+		return Allocs;
+	}
+
+	for (const json11::Json& AllocVal : Json.array_items())
+	{
+		NomadAllocInfo Alloc;
+		Alloc.Id		   = AllocVal["ID"].string_value();
+		Alloc.ClientStatus = AllocVal["ClientStatus"].string_value();
+
+		if (const json11::Json TaskStates = AllocVal["TaskStates"]; TaskStates.is_object())
+		{
+			for (const auto& [TaskName, TaskState] : TaskStates.object_items())
+			{
+				if (TaskState["State"].is_string())
+				{
+					Alloc.TaskState = TaskState["State"].string_value();
+				}
+			}
+		}
+
+		Allocs.push_back(std::move(Alloc));
+	}
+
+	return Allocs;
+}
+
+std::vector<NomadJobInfo>
+NomadTestClient::ListJobs(std::string_view Prefix)
+{
+	ZEN_TRACE_CPU("ListNomadJobs");
+
+	std::vector<NomadJobInfo> Jobs;
+
+	std::string Url = "v1/jobs";
+	if (!Prefix.empty())
+	{
+		Url = fmt::format("v1/jobs?prefix={}", Prefix);
+	}
+
+	HttpClient::Response Response = m_HttpClient.Get(Url);
+
+	if (!Response || !Response.IsSuccess())
+	{
+		ZEN_WARN("NomadTestClient: ListJobs failed");
+		return Jobs;
+	}
+
+	std::string		   Body(Response.AsText());
+	std::string		   Err;
+	const json11::Json Json = json11::Json::parse(Body, Err);
+
+	if (!Err.empty() || !Json.is_array())
+	{
+		return Jobs;
+	}
+
+	for (const json11::Json& JobVal : Json.array_items())
+	{
+		NomadJobInfo Job;
+		Job.Id	   = JobVal["ID"].string_value();
+		Job.Status = JobVal["Status"].string_value();
+		if (const json11::Json Desc = JobVal["StatusDescription"]; Desc.is_string())
+		{
+			Job.StatusDescription = Desc.string_value();
+		}
+		Jobs.push_back(std::move(Job));
+	}
+
+	return Jobs;
+}
+
+}  // namespace zen::nomad