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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1997, 1998
* Sleepycat Software. All rights reserved.
*
* @(#)AppinitExample.cpp 10.6 (Sleepycat) 4/10/98
*/
#include "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>
#define DATABASE_HOME "/home/database"
DB_ENV *db_setup(FILE *);
char *progname = "AppinitExample"; /* Program name. */
/*
* An example of a program using DbEnv to configure its DB
* environment.
*/
DbEnv *
init()
{
DbEnv *dbenv = new DbEnv();
char *config[2];
// Output errors to the application's log.
//
dbenv->set_error_stream(&cerr);
dbenv->set_errpfx(progname);
//
// All of the shared database files live in /home/database,
// but data files live in /database.
//
config[0] = "DB_DATA_DIR /database/files";
config[1] = NULL;
//
// We want to specify the shared memory buffer pool cachesize,
// but everything else is the default.
//
dbenv->set_mp_size(64 * 1024);
//
// We have multiple processes reading/writing these files, so
// we need concurrency control and a shared buffer pool, but
// not logging or transactions.
//
if ((errno = dbenv->appinit(DATABASE_HOME,
config, DB_CREATE | DB_INIT_LOCK | DB_INIT_MPOOL)) != 0) {
cerr << progname << ": db_appinit: " << strerror(errno);
exit (1);
}
return dbenv;
}
int
main(int, char **)
{
//
// Note: it may be easiest to put all 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
{
DbEnv *dbenv = init();
// ... your application here ...
delete dbenv;
return 0;
}
catch (DbException &dbe)
{
cerr << "AccessExample: " << dbe.what() << "\n";
return 1;
}
}
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