cache log sessionid (#297)

* implemented structured cache logging to be used as audit trail to help analyse potential cache pollution/corruption
* added common header to all known log targets
* made Oid::operator bool explicit to avoid logging/text format mishaps
* HttpClient::operator bool -> explicit
* changed cache logs to not rotate on start in order to retain more history
* added CacheRequestContext
* properly initialize request context
* log session id and request id on zencacehstore get/put
* changelog

1 files changed, 23 insertions, 16 deletions

diff --git a/src/zenserver/cache/httpstructuredcache.h b/src/zenserver/cache/httpstructuredcache.h
index 4f03daae4..60714d6ae 100644
--- a/src/zenserver/cache/httpstructuredcache.h
+++ b/src/zenserver/cache/httpstructuredcache.h
@@ -6,6 +6,7 @@
 #include <zenhttp/httpserver.h>
 #include <zenhttp/httpstats.h>
 #include <zenhttp/httpstatus.h>
+#include <zenutil/cache/cache.h>
 
 #include <memory>
 #include <vector>
@@ -113,17 +114,18 @@ private:
 	void HandleRpcRequest(HttpServerRequest& Request);
 	void HandleDetailsRequest(HttpServerRequest& Request);
 
-	CbPackage		 HandleRpcPutCacheRecords(const CbPackage& BatchRequest);
-	CbPackage		 HandleRpcGetCacheRecords(CbObjectView BatchRequest);
-	CbPackage		 HandleRpcPutCacheValues(const CbPackage& BatchRequest);
-	CbPackage		 HandleRpcGetCacheValues(CbObjectView BatchRequest);
-	CbPackage		 HandleRpcGetCacheChunks(CbObjectView BatchRequest);
-	HttpResponseCode HandleRpcRequest(const ZenContentType ContentType,
-									  IoBuffer&&		   Body,
-									  uint32_t&			   OutAcceptMagic,
-									  RpcAcceptOptions&	   OutAcceptFlags,
-									  int&				   OutTargetProcessId,
-									  CbPackage&		   OutPackage);
+	CbPackage		 HandleRpcPutCacheRecords(const CacheRequestContext& Context, const CbPackage& BatchRequest);
+	CbPackage		 HandleRpcGetCacheRecords(const CacheRequestContext& Context, CbObjectView BatchRequest);
+	CbPackage		 HandleRpcPutCacheValues(const CacheRequestContext& Context, const CbPackage& BatchRequest);
+	CbPackage		 HandleRpcGetCacheValues(const CacheRequestContext& Context, CbObjectView BatchRequest);
+	CbPackage		 HandleRpcGetCacheChunks(const CacheRequestContext& Context, CbObjectView BatchRequest);
+	HttpResponseCode HandleRpcRequest(const CacheRequestContext& Context,
+									  const ZenContentType		 ContentType,
+									  IoBuffer&&				 Body,
+									  uint32_t&					 OutAcceptMagic,
+									  RpcAcceptOptions&			 OutAcceptFlags,
+									  int&						 OutTargetProcessId,
+									  CbPackage&				 OutPackage);
 
 	void		 HandleCacheRequest(HttpServerRequest& Request);
 	void		 HandleCacheNamespaceRequest(HttpServerRequest& Request, std::string_view Namespace);
@@ -142,22 +144,27 @@ private:
 									std::vector<cache::detail::ChunkRequest*>& ValueRequests,
 									CbObjectView							   RpcRequest);
 	/** HandleRpcGetCacheChunks Helper: Load records to get ContentId for RecordRequests, and load their payloads if they exist locally. */
-	void GetLocalCacheRecords(std::string_view							 Namespace,
+	void GetLocalCacheRecords(const CacheRequestContext&				 Context,
+							  std::string_view							 Namespace,
 							  std::vector<CacheKeyRequest>&				 RecordKeys,
 							  std::vector<cache::detail::RecordBody>&	 Records,
 							  std::vector<cache::detail::ChunkRequest*>& RecordRequests,
 							  std::vector<CacheChunkRequest*>&			 OutUpstreamChunks);
 	/** HandleRpcGetCacheChunks Helper: For ValueRequests, load their payloads if they exist locally. */
-	void GetLocalCacheValues(std::string_view							Namespace,
+	void GetLocalCacheValues(const CacheRequestContext&					Context,
+							 std::string_view							Namespace,
 							 std::vector<cache::detail::ChunkRequest*>& ValueRequests,
 							 std::vector<CacheChunkRequest*>&			OutUpstreamChunks);
 	/** HandleRpcGetCacheChunks Helper: Load payloads from upstream that did not exist locally. */
-	void GetUpstreamCacheChunks(std::string_view						  Namespace,
+	void GetUpstreamCacheChunks(const CacheRequestContext&				  Context,
+								std::string_view						  Namespace,
 								std::vector<CacheChunkRequest*>&		  UpstreamChunks,
 								std::vector<CacheChunkRequest>&			  RequestKeys,
 								std::vector<cache::detail::ChunkRequest>& Requests);
 	/** HandleRpcGetCacheChunks Helper: Send response message containing all chunk results. */
-	CbPackage WriteGetCacheChunksResponse(std::string_view Namespace, std::vector<cache::detail::ChunkRequest>& Requests);
+	CbPackage WriteGetCacheChunksResponse(const CacheRequestContext&				Context,
+										  std::string_view							Namespace,
+										  std::vector<cache::detail::ChunkRequest>& Requests);
 
 	bool AreDiskWritesAllowed() const;
 
@@ -174,7 +181,7 @@ private:
 	CacheStats				 m_CacheStats;
 	const DiskWriteBlocker*	 m_DiskWriteBlocker = nullptr;
 
-	void ReplayRequestRecorder(cache::IRpcRequestReplayer& Replayer, uint32_t ThreadCount);
+	void ReplayRequestRecorder(const CacheRequestContext& Context, cache::IRpcRequestReplayer& Replayer, uint32_t ThreadCount);
 
 	std::unique_ptr<cache::IRpcRequestRecorder> m_RequestRecorder;
 };