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/** |
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* This file is part of the CernVM File System. |
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*/ |
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#ifndef CVMFS_NFS_MAPS_SQLITE_H_ |
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#define CVMFS_NFS_MAPS_SQLITE_H_ |
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#include <pthread.h> |
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#include <string> |
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#include "crypto/hash.h" |
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#include "duplex_sqlite3.h" |
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#include "nfs_maps.h" |
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#include "shortstring.h" |
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#include "util/atomic.h" |
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#include "util/prng.h" |
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namespace perf { |
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class Counter; |
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class Statistics; |
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} // namespace perf |
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class NfsMapsSqlite : public NfsMaps { |
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public: |
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virtual ~NfsMapsSqlite(); |
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virtual uint64_t GetInode(const PathString &path); |
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virtual bool GetPath(const uint64_t inode, PathString *path); |
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static NfsMapsSqlite *Create(const std::string &db_dir, |
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const uint64_t root_inode, |
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const bool rebuild, |
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perf::Statistics *statistics_); |
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private: |
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static const char *kSqlCreateTable; |
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static const char *kSqlAddRoot; |
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static const char *kSqlAddInode; |
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static const char *kSqlGetInode; |
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static const char *kSqlGetPath; |
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struct BusyHandlerInfo { |
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BusyHandlerInfo() : accumulated_ms(0) { prng.InitLocaltime(); } |
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static const unsigned kMaxWaitMs = 60000; |
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static const unsigned kMaxBackoffMs = 100; |
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unsigned accumulated_ms; |
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Prng prng; |
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}; |
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static int BusyHandler(void *data, int attempt); |
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NfsMapsSqlite(); |
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uint64_t FindInode(const PathString &path); |
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uint64_t IssueInode(const PathString &path); |
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uint64_t RetryGetInode(const PathString &path, int attempt); |
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sqlite3 *db_; |
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sqlite3_stmt *stmt_get_path_; |
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sqlite3_stmt *stmt_get_inode_; |
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sqlite3_stmt *stmt_add_; |
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pthread_mutex_t *lock_; |
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BusyHandlerInfo busy_handler_info_; |
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perf::Counter *n_db_seq_; |
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perf::Counter *n_db_added_; |
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perf::Counter *n_db_path_found_; |
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perf::Counter *n_db_inode_found_; |
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}; |
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#endif // CVMFS_NFS_MAPS_SQLITE_H_ |
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