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97 lines
2.1 KiB
C++
97 lines
2.1 KiB
C++
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1997, 1998
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* Sleepycat Software. All rights reserved.
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*
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* @(#)AppinitExample.cpp 10.6 (Sleepycat) 4/10/98
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*/
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#include "config.h"
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <errno.h>
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#include <iostream.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#endif
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#include <db_cxx.h>
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#define DATABASE_HOME "/home/database"
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DB_ENV *db_setup(FILE *);
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char *progname = "AppinitExample"; /* Program name. */
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/*
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* An example of a program using DbEnv to configure its DB
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* environment.
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*/
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DbEnv *
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init()
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{
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DbEnv *dbenv = new DbEnv();
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char *config[2];
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// Output errors to the application's log.
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//
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dbenv->set_error_stream(&cerr);
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dbenv->set_errpfx(progname);
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//
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// All of the shared database files live in /home/database,
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// but data files live in /database.
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//
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config[0] = "DB_DATA_DIR /database/files";
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config[1] = NULL;
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//
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// We want to specify the shared memory buffer pool cachesize,
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// but everything else is the default.
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//
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dbenv->set_mp_size(64 * 1024);
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//
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// We have multiple processes reading/writing these files, so
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// we need concurrency control and a shared buffer pool, but
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// not logging or transactions.
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//
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if ((errno = dbenv->appinit(DATABASE_HOME,
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config, DB_CREATE | DB_INIT_LOCK | DB_INIT_MPOOL)) != 0) {
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cerr << progname << ": db_appinit: " << strerror(errno);
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exit (1);
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}
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return dbenv;
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}
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int
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main(int, char **)
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{
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//
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// Note: it may be easiest to put all DB operations in a try block, as
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// seen here. Alternatively, you can change the ErrorModel in the DbEnv
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// so that exceptions are never thrown and check error returns from all
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// methods.
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//
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try
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{
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DbEnv *dbenv = init();
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// ... your application here ...
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delete dbenv;
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return 0;
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}
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catch (DbException &dbe)
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{
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cerr << "AccessExample: " << dbe.what() << "\n";
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return 1;
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}
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}
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