the begginning

utils/testbc/blockrequestprocessor.h

@@ -0,0 +1,137 @@
+/* Copyright (C) 2014 InfiniDB, Inc.
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License
+   as published by the Free Software Foundation; version 2 of
+   the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA. */
+
+#ifndef BLOCKREQUESTPROCESSOR_H
+#define BLOCKREQUESTPROCESSOR_H
+
+/***************************************************************************
+ *
+ *   $Id: blockrequestprocessor.h 725 2008-09-26 16:26:47Z jrodriguez $
+ *
+ *   jrodriguez@calpont.com   *
+ *                                                                         *
+ ***************************************************************************/
+
+
+#include "blocksize.h"
+#include "fileblockrequestqueue.h"
+#include "filebuffermgr.h"
+#include "iomanager.h"
+
+/**
+	@author Jason Rodriguez <jrodriguez@calpont.com>
+*/
+
+namespace dbbc {
+
+typedef std::list<FileBuffer> FileBufferList_t;
+
+/**
+ * @brief class to control the populating of the Disk Block Buffer Cache and manage Block requests.
+ **/
+ 
+class BlockRequestProcessor {
+
+public:
+	
+	/**
+	 * @brief default ctor
+	 **/
+    BlockRequestProcessor(uint32_t numBlcks, int thrCount, int blocksPerRead, uint32_t deleteBlocks=0,
+		uint32_t blckSz=BLOCK_SIZE);
+
+	/**
+	 * @brief default dtor
+	 **/
+    virtual ~BlockRequestProcessor();
+
+	/**
+	 * @brief send a request for disk blocks to the IO manager
+	 **/
+	int sendRequest(fileRequest& blk);
+
+	/**
+	 * @brief verify that the lbid@ver disk block is in the block cache. Send request if it is not
+	 **/
+	int check(BRM::LBID_t lbid, BRM::VER_t ver, bool flg, bool& wasBlockInCache);
+	
+	/**
+	 * @brief verify the LBIDRange of disk blocks is in the block cache. Send request if it is not
+	 **/
+	int check(const BRM::InlineLBIDRange& range, const BRM::VER_t ver, uint32_t& lbidCount);
+	
+	/**
+	 * @brief retrieve the lbid@ver disk block from the block cache
+	 **/
+	FileBuffer* getBlockPtr(const BRM::LBID_t lbid, const BRM::VER_t ver);
+
+	const int read(const BRM::LBID_t& lbid, const BRM::VER_t& ver, FileBuffer& fb);
+
+	/**
+	 * @brief retrieve the lbid@ver disk block from the block cache
+	 **/
+	const int read(const BRM::LBID_t& lbid, const BRM::VER_t& ver, void* bufferPtr);
+	
+	/**
+	 * @brief retrieve the LBIDRange of disk blocks from the block cache
+	 **/
+	const int read(const BRM::InlineLBIDRange& range, FileBufferList_t& fbList, const BRM::VER_t ver);
+	
+	const int getBlock(const BRM::LBID_t& lbid, const BRM::VER_t& ver, void* bufferPtr, 
+		bool flg, bool &wasCached);
+
+	bool exists(BRM::LBID_t lbid, BRM::VER_t ver);
+
+	/**
+	 * @brief 
+	 **/
+	void flushCache();
+
+	//const uint32_t resize(const uint32_t s);
+
+	std::ostream& formatLRUList(std::ostream& os) const;
+	
+private:
+	
+	FileBufferMgr fbMgr;
+	fileBlockRequestQueue fBRPRequestQueue;
+	ioManager fIOMgr;
+	pthread_mutex_t check_mutex;
+
+	/**
+	 * helper function for public check functions
+	 **/
+	int check(fileRequest& rqstBlk);
+
+	/**
+	 * send stop requests for IOmanager and request Q
+	 **/
+	void stop();
+
+	std::ofstream fLogFile;
+	bool fTrace;
+
+	BRM::DBRM fdbrm;
+
+	// do not implement
+	BlockRequestProcessor(const BlockRequestProcessor& brp);
+	BlockRequestProcessor& operator=(const BlockRequestProcessor& brp);
+	
+};
+
+}
+#endif