/** Closes the Database. */
void close(uint32_t flags = 0) {
if (!m_db)
return;
// disable auto-cleanup; all objects will be destroyed when
// going out of scope
flags &= ~HAM_AUTO_CLEANUP;
ham_status_t st = ham_db_close(m_db, flags);
if (st)
throw error(st);
m_db = 0;
}
int
main(int argc, char **argv) {
int i;
ham_status_t st; /* status variable */
ham_env_t *env; /* hamsterdb Environment object */
ham_db_t *db; /* hamsterdb Database object */
ham_key_t key = {0}; /* the structure for a key */
ham_record_t record = {0}; /* the structure for a record */
/*
* Connect to the server which should listen at 8080. The server is
* implemented in server1.c.
*/
st = ham_env_create(&env, "ham://localhost:8080/env1.db", 0, 0, 0);
if (st != HAM_SUCCESS)
error("ham_env_create", st);
/* now open a Database in this Environment */
st = ham_env_open_db(env, &db, 13, 0, 0);
if (st != HAM_SUCCESS)
error("ham_env_open_db", st);
/* now we can insert, delete or lookup values in the database */
for (i = 0; i < LOOP; i++) {
key.data = &i;
key.size = sizeof(i);
record.size = key.size;
record.data = key.data;
st = ham_db_insert(db, 0, &key, &record, 0);
if (st != HAM_SUCCESS)
error("ham_db_insert", st);
}
/* now lookup all values */
for (i = 0; i < LOOP; i++) {
key.data = &i;
key.size = sizeof(i);
st = ham_db_find(db, 0, &key, &record, 0);
if (st != HAM_SUCCESS)
error("ham_db_find", st);
/* check if the value is ok */
if (*(int *)record.data != i) {
printf("ham_db_find() ok, but returned bad value\n");
return (-1);
}
}
/* erase everything */
for (i = 0; i < LOOP; i++) {
key.data = &i;
key.size = sizeof(i);
st = ham_db_erase(db, 0, &key, 0);
if (st != HAM_SUCCESS)
error("ham_db_erase", st);
}
/* and make sure that the database is empty */
for (i = 0; i < LOOP; i++) {
key.data = &i;
key.size = sizeof(i);
st = ham_db_find(db, 0, &key, &record, 0);
if (st != HAM_KEY_NOT_FOUND)
error("ham_db_find", st);
}
/* close the database handle */
st = ham_db_close(db, 0);
if (st != HAM_SUCCESS)
error("ham_db_close", st);
/* close the environment handle */
st = ham_env_close(env, 0);
if (st != HAM_SUCCESS)
error("ham_env_close", st);
printf("success!\n");
return (0);
}
int
main(int argc, char **argv) {
uint32_t i;
ham_status_t st; /* status variable */
ham_env_t *env; /* hamsterdb environment object */
ham_db_t *db; /* hamsterdb database object */
ham_key_t key = {0}; /* the structure for a key */
ham_record_t record = {0}; /* the structure for a record */
ham_parameter_t params[] = { /* parameters for ham_env_create_db */
{HAM_PARAM_KEY_TYPE, HAM_TYPE_UINT32},
{HAM_PARAM_RECORD_SIZE, sizeof(uint32_t)},
{0, }
};
/* First create a new hamsterdb Environment */
st = ham_env_create(&env, "test.db", 0, 0664, 0);
if (st != HAM_SUCCESS)
error("ham_create", st);
/* And in this Environment we create a new Database for uint32-keys
* and uint32-records. */
st = ham_env_create_db(env, &db, DATABASE_NAME, 0, ¶ms[0]);
if (st != HAM_SUCCESS)
error("ham_create", st);
/*
* now we can insert, delete or lookup values in the database
*
* for our test program, we just insert a few values, then look them
* up, then delete them and try to look them up again (which will fail).
*/
for (i = 0; i < LOOP; i++) {
key.data = &i;
key.size = sizeof(i);
record.size = key.size;
record.data = key.data;
st = ham_db_insert(db, 0, &key, &record, 0);
if (st != HAM_SUCCESS)
error("ham_db_insert", st);
}
/*
* now lookup all values
*
* for ham_db_find(), we could use the flag HAM_RECORD_USER_ALLOC, if WE
* allocate record.data (otherwise the memory is automatically allocated
* by hamsterdb)
*/
for (i = 0; i < LOOP; i++) {
key.data = &i;
key.size = sizeof(i);
st = ham_db_find(db, 0, &key, &record, 0);
if (st != HAM_SUCCESS)
error("ham_db_find", st);
/*
* check if the value is ok
*/
if (*(int *)record.data != i) {
printf("ham_db_find() ok, but returned bad value\n");
return (-1);
}
}
/*
* close the database handle, then re-open it (to demonstrate how to open
* an Environment and a Database)
*/
st = ham_db_close(db, 0);
if (st != HAM_SUCCESS)
error("ham_db_close", st);
st = ham_env_close(env, 0);
if (st != HAM_SUCCESS)
error("ham_env_close", st);
st = ham_env_open(&env, "test.db", 0, 0);
if (st != HAM_SUCCESS)
error("ham_env_open", st);
st = ham_env_open_db(env, &db, DATABASE_NAME, 0, 0);
if (st != HAM_SUCCESS)
error("ham_env_open_db", st);
/* now erase all values */
for (i = 0; i < LOOP; i++) {
key.size = sizeof(i);
key.data = &i;
st = ham_db_erase(db, 0, &key, 0);
if (st != HAM_SUCCESS)
error("ham_db_erase", st);
}
/*
* once more we try to find all values... every ham_db_find() call must
* now fail with HAM_KEY_NOT_FOUND
*/
for (i = 0; i < LOOP; i++) {
key.size = sizeof(i);
key.data = &i;
st = ham_db_find(db, 0, &key, &record, 0);
if (st != HAM_KEY_NOT_FOUND)
error("ham_db_find", st);
}
/* we're done! close the handles. HAM_AUTO_CLEANUP will also close the
* 'db' handle */
st = ham_env_close(env, HAM_AUTO_CLEANUP);
if (st != HAM_SUCCESS)
error("ham_env_close", st);
printf("success!\n");
return (0);
}