Implemented flush operations for cache services

Also implemented basic upstream query interface, which needs a bit more work to be fully functional (chunk propagation / fetching and new propagation policies as per DDC requirements)

1 files changed, 96 insertions, 1 deletions

diff --git a/zenserver/upstream/zen.cpp b/zenserver/upstream/zen.cpp
index 7904f9b28..715df6f69 100644
--- a/zenserver/upstream/zen.cpp
+++ b/zenserver/upstream/zen.cpp
@@ -7,12 +7,14 @@
 #include <zencore/fmtutils.h>
 #include <zencore/stream.h>
 
+#include "cache/structuredcachestore.h"
+
+#include <cpr/cpr.h>
 #include <spdlog/spdlog.h>
 #include <xxhash.h>
 #include <gsl/gsl-lite.hpp>
 
 namespace zen {
-
 namespace detail {
 	struct MessageHeader
 	{
@@ -288,4 +290,97 @@ Mesh::IssueReceive()
 		});
 }
 
+//////////////////////////////////////////////////////////////////////////
+
+namespace detail {
+	struct ZenCacheSessionState
+	{
+		ZenCacheSessionState(ZenStructuredCacheClient& Client) : OwnerClient(Client) {}
+		~ZenCacheSessionState() {}
+
+		void Reset() {}
+
+		ZenStructuredCacheClient& OwnerClient;
+		cpr::Session			  Session;
+	};
+}  // namespace detail
+
+//////////////////////////////////////////////////////////////////////////
+
+ZenStructuredCacheClient::ZenStructuredCacheClient(std::string_view ServiceUrl) : m_ServiceUrl(ServiceUrl)
+{
+}
+
+ZenStructuredCacheClient::~ZenStructuredCacheClient()
+{
+}
+
+detail::ZenCacheSessionState*
+ZenStructuredCacheClient::AllocSessionState()
+{
+	detail::ZenCacheSessionState* State = nullptr;
+
+	if (RwLock::ExclusiveLockScope _(m_SessionStateLock); !m_SessionStateCache.empty())
+	{
+		State = m_SessionStateCache.front();
+		m_SessionStateCache.pop_front();
+	}
+
+	if (State == nullptr)
+	{
+		State = new detail::ZenCacheSessionState(*this);
+	}
+
+	State->Reset();
+
+	return State;
+}
+
+void
+ZenStructuredCacheClient::FreeSessionState(detail::ZenCacheSessionState* State)
+{
+	RwLock::ExclusiveLockScope _(m_SessionStateLock);
+	m_SessionStateCache.push_front(State);
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+ZenStructuredCacheSession::ZenStructuredCacheSession(ZenStructuredCacheClient& OuterClient) : m_Client(OuterClient)
+{
+}
+
+ZenStructuredCacheSession::~ZenStructuredCacheSession()
+{
+}
+
+IoBuffer
+ZenStructuredCacheSession::Get(std::string_view BucketId, std::string_view Key)
+{
+	ZEN_UNUSED(BucketId, Key);
+
+	return {};
+}
+
+void
+ZenStructuredCacheSession::Put(std::string_view BucketId, std::string_view Key, IoBuffer Data)
+{
+	ZEN_UNUSED(BucketId, Key, Data);
+}
+
+// Structured cache operations
+
+IoBuffer
+ZenStructuredCacheSession::Get(std::string_view BucketId, const IoHash& Key)
+{
+	ZEN_UNUSED(BucketId, Key);
+
+	return {};
+}
+
+void
+ZenStructuredCacheSession::Put(std::string_view BucketId, const IoHash& Key, ZenCacheValue Data)
+{
+	ZEN_UNUSED(BucketId, Key, Data);
+}
+
 }  // namespace zen