123 lines
2.7 KiB
C++
123 lines
2.7 KiB
C++
/*-
|
|
* See the file LICENSE for redistribution information.
|
|
*
|
|
* Copyright (c) 1997, 1998, 1999, 2000
|
|
* Sleepycat Software. All rights reserved.
|
|
*
|
|
* $Id: EnvExample.cpp,v 11.12 2000/10/27 20:32:00 dda Exp $
|
|
*/
|
|
|
|
#include "db_config.h"
|
|
|
|
#ifndef NO_SYSTEM_INCLUDES
|
|
#include <sys/types.h>
|
|
|
|
#include <errno.h>
|
|
#include <iostream.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include <db_cxx.h>
|
|
|
|
#ifdef macintosh
|
|
#define DATABASE_HOME ":database"
|
|
#define CONFIG_DATA_DIR ":database"
|
|
#else
|
|
#ifdef DB_WIN32
|
|
#define DATABASE_HOME "\\tmp\\database"
|
|
#define CONFIG_DATA_DIR "\\database\\files"
|
|
#else
|
|
#define DATABASE_HOME "/tmp/database"
|
|
#define CONFIG_DATA_DIR "/database/files"
|
|
#endif
|
|
#endif
|
|
|
|
void db_setup(char *, char *, ostream&);
|
|
void db_teardown(char *, char *, ostream&);
|
|
|
|
char *progname = "EnvExample"; /* Program name. */
|
|
|
|
//
|
|
// An example of a program creating/configuring a Berkeley DB environment.
|
|
//
|
|
int
|
|
main(int, char **)
|
|
{
|
|
//
|
|
// Note: it may be easiest to put all Berkeley DB operations in a
|
|
// try block, as seen here. Alternatively, you can change the
|
|
// ErrorModel in the DbEnv so that exceptions are never thrown
|
|
// and check error returns from all methods.
|
|
//
|
|
try {
|
|
char *data_dir, *home;
|
|
|
|
//
|
|
// All of the shared database files live in /home/database,
|
|
// but data files live in /database.
|
|
//
|
|
home = DATABASE_HOME;
|
|
data_dir = CONFIG_DATA_DIR;
|
|
|
|
cout << "Setup env\n";
|
|
db_setup(DATABASE_HOME, data_dir, cerr);
|
|
|
|
cout << "Teardown env\n";
|
|
db_teardown(DATABASE_HOME, data_dir, cerr);
|
|
return 0;
|
|
}
|
|
catch (DbException &dbe) {
|
|
cerr << "AccessExample: " << dbe.what() << "\n";
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
// Note that any of the db calls can throw DbException
|
|
void
|
|
db_setup(char *home, char *data_dir, ostream& err_stream)
|
|
{
|
|
//
|
|
// Create an environment object and initialize it for error
|
|
// reporting.
|
|
//
|
|
DbEnv *dbenv = new DbEnv(0);
|
|
dbenv->set_error_stream(&err_stream);
|
|
dbenv->set_errpfx(progname);
|
|
|
|
//
|
|
// We want to specify the shared memory buffer pool cachesize,
|
|
// but everything else is the default.
|
|
//
|
|
dbenv->set_cachesize(0, 64 * 1024, 0);
|
|
|
|
// Databases are in a subdirectory.
|
|
(void)dbenv->set_data_dir(data_dir);
|
|
|
|
// Open the environment with full transactional support.
|
|
dbenv->open(DATABASE_HOME,
|
|
DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN, 0);
|
|
|
|
// Do something interesting...
|
|
|
|
// Close the handle.
|
|
dbenv->close(0);
|
|
}
|
|
|
|
void
|
|
db_teardown(char *home, char *data_dir, ostream& err_stream)
|
|
{
|
|
// Remove the shared database regions.
|
|
DbEnv *dbenv = new DbEnv(0);
|
|
|
|
dbenv->set_error_stream(&err_stream);
|
|
dbenv->set_errpfx(progname);
|
|
|
|
(void)dbenv->set_data_dir(data_dir);
|
|
dbenv->remove(home, 0);
|
|
delete dbenv;
|
|
}
|