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, 21 insertions, 0 deletions

diff --git a/src/zenserver/storage/zenstorageserver.cpp b/src/zenserver/storage/zenstorageserver.cpp
index 2b74395c3..ff854b72d 100644
--- a/src/zenserver/storage/zenstorageserver.cpp
+++ b/src/zenserver/storage/zenstorageserver.cpp
@@ -182,6 +182,13 @@ ZenStorageServer::RegisterServices()
 #endif	// ZEN_WITH_VFS
 
 	m_Http->RegisterService(*m_AdminService);
+
+#if ZEN_WITH_COMPUTE_SERVICES
+	if (m_HttpFunctionService)
+	{
+		m_Http->RegisterService(*m_HttpFunctionService);
+	}
+#endif
 }
 
 void
@@ -267,6 +274,16 @@ ZenStorageServer::InitializeServices(const ZenStorageServerConfig& ServerOptions
 		m_BuildStoreService = std::make_unique<HttpBuildStoreService>(m_StatusService, m_StatsService, *m_BuildStore);
 	}
 
+#if ZEN_WITH_COMPUTE_SERVICES
+	if (ServerOptions.ComputeEnabled)
+	{
+		ZEN_OTEL_SPAN("InitializeComputeService");
+
+		m_HttpFunctionService =
+			std::make_unique<compute::HttpFunctionService>(*m_CidStore, m_StatsService, ServerOptions.DataDir / "functions");
+	}
+#endif
+
 #if ZEN_WITH_VFS
 	m_VfsServiceImpl = std::make_unique<VfsServiceImpl>();
 	m_VfsServiceImpl->AddService(Ref<ProjectStore>(m_ProjectStore));
@@ -805,6 +822,10 @@ ZenStorageServer::Cleanup()
 
 		Flush();
 
+#if ZEN_WITH_COMPUTE_SERVICES
+		m_HttpFunctionService.reset();
+#endif
+
 		m_AdminService.reset();
 		m_VfsService.reset();
 		m_VfsServiceImpl.reset();