TestLogc.cpp
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上传日期:2022-05-23
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文件大小:2k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 2000-2002
- * Sleepycat Software. All rights reserved.
- *
- * $Id: TestLogc.cpp,v 1.6 2002/01/23 14:26:41 bostic Exp $
- */
- /*
- * A basic regression test for the Logc class.
- */
- #include <db_cxx.h>
- #include <iostream.h>
- static void show_dbt(ostream &os, Dbt *dbt)
- {
- int i;
- int size = dbt->get_size();
- unsigned char *data = (unsigned char *)dbt->get_data();
- os << "size: " << size << " data: ";
- for (i=0; i<size && i<10; i++) {
- os << (int)data[i] << " ";
- }
- if (i<size)
- os << "...";
- }
- int main(int argc, char *argv[])
- {
- try {
- DbEnv *env = new DbEnv(0);
- env->open(".", DB_CREATE | DB_INIT_LOG | DB_INIT_MPOOL, 0);
- // Do some database activity to get something into the log.
- Db *db1 = new Db(env, 0);
- db1->open(NULL, "first.db", NULL, DB_BTREE, DB_CREATE, 0);
- Dbt *key = new Dbt((char *)"a", 1);
- Dbt *data = new Dbt((char *)"b", 1);
- db1->put(NULL, key, data, 0);
- key->set_data((char *)"c");
- data->set_data((char *)"d");
- db1->put(NULL, key, data, 0);
- db1->close(0);
- Db *db2 = new Db(env, 0);
- db2->open(NULL, "second.db", NULL, DB_BTREE, DB_CREATE, 0);
- key->set_data((char *)"w");
- data->set_data((char *)"x");
- db2->put(NULL, key, data, 0);
- key->set_data((char *)"y");
- data->set_data((char *)"z");
- db2->put(NULL, key, data, 0);
- db2->close(0);
- // Now get a log cursor and walk through.
- DbLogc *logc;
- env->log_cursor(&logc, 0);
- int ret = 0;
- DbLsn lsn;
- Dbt *dbt = new Dbt();
- u_int32_t flags = DB_FIRST;
- int count = 0;
- while ((ret = logc->get(&lsn, dbt, flags)) == 0) {
- // We ignore the contents of the log record,
- // it's not portable. Even the exact count
- // is may change when the underlying implementation
- // changes, we'll just make sure at the end we saw
- // 'enough'.
- //
- // cout << "logc.get: " << count;
- // show_dbt(cout, dbt);
- // cout << "n";
- //
- count++;
- flags = DB_NEXT;
- }
- if (ret != DB_NOTFOUND) {
- cerr << "*** FAIL: logc.get returned: "
- << DbEnv::strerror(ret) << "n";
- }
- logc->close(0);
- // There has to be at *least* four log records,
- // since we did four separate database operations.
- //
- if (count < 4)
- cerr << "*** FAIL: not enough log recordsn";
- cout << "TestLogc done.n";
- }
- catch (DbException &dbe) {
- cerr << "*** FAIL: " << dbe.what() <<"n";
- }
- return 0;
- }