structured compute basics (#714)

this change adds the `zencompute` component, which can be used to distribute work dispatched from UE using the DDB (Derived Data Build) APIs via zenserver

this change also adds a distinct zenserver compute mode (`zenserver compute`) which is intended to be used for leaf compute nodes

to exercise the compute functionality without directly involving UE, a `zen exec` subcommand is also added, which can be used to feed replays through the system

all new functionality is considered *experimental* and disabled by default at this time, behind the `zencompute` option in xmake config

1 files changed, 36 insertions, 0 deletions

diff --git a/src/zenserver/compute/computeservice.h b/src/zenserver/compute/computeservice.h
new file mode 100644
index 000000000..339200dd8
--- /dev/null
+++ b/src/zenserver/compute/computeservice.h
@@ -0,0 +1,36 @@
+// Copyright Epic Games, Inc. All Rights Reserved.
+
+#pragma once
+
+#include <zenhttp/httpserver.h>
+
+#if ZEN_WITH_COMPUTE_SERVICES
+namespace zen {
+
+/** ZenServer Compute Service
+ *
+ * Manages a set of compute workers for use in UEFN content worker
+ *
+ */
+class HttpComputeService : public zen::HttpService
+{
+public:
+	HttpComputeService(std::filesystem::path BaseDir);
+	~HttpComputeService();
+
+	HttpComputeService(const HttpComputeService&) = delete;
+	HttpComputeService& operator=(const HttpComputeService&) = delete;
+
+	virtual const char* BaseUri() const override;
+	virtual void		HandleRequest(zen::HttpServerRequest& Request) override;
+
+private:
+	HttpRequestRouter m_Router;
+
+	struct Impl;
+
+	std::unique_ptr<Impl> m_Impl;
+};
+
+}  // namespace zen
+#endif	// ZEN_WITH_COMPUTE_SERVICES