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/*
* Copyright (C) 2015 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authored by: Michi Henning <michi.henning@canonical.com>
*/
#include <core/persistent_string_cache.h>
#include <iostream>
#include <sstream>
#include <string>
using namespace std;
#define DB_NAME "string_db"
int main(int /* argc */, char** /* argv */)
{
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-result"
system("rm -fr " DB_NAME "/*");
#pragma GCC diagnostic pop
auto c = core::PersistentStringCache::open(DB_NAME, 1024 * 1024 * 1024, core::CacheDiscardPolicy::lru_only);
string const bjarne = "Bjarne Stroustrup";
// Retrieve a non-existent entry.
auto value = c->get(bjarne);
assert(!value);
// Remove a non-existent entry. The return value indicates that it did not exist.
assert(!c->invalidate(bjarne));
// Add an entry to the cache.
c->put(bjarne, "C++ inventor");
// Retrieve the entry.
value = c->get(bjarne);
assert(value);
assert(*value == "C++ inventor");
// Test that the entry is there.
assert(c->contains_key(bjarne));
// Get metadata for the entry.
assert(!c->get_metadata(bjarne)); // No metadata exists
// Get value and metadata for the entry.
auto data = c->get_data(bjarne);
assert(data->value == "C++ inventor");
assert(data->metadata == ""); // No metadata exists
// Add metadata.
c->put_metadata(bjarne, "Born 30 December 1950");
// Check metadata.
assert(*c->get_metadata(bjarne) == "Born 30 December 1950");
// It's not possible to delete metadata. The only thing we can do is
// set it to the empty string.
c->put_metadata(bjarne, "");
assert(*c->get_metadata(bjarne) == "");
// Remove the entry. The return value indicates that it existed and was removed.
assert(c->invalidate(bjarne));
// Binary keys and values are fine.
string bin_key = "a";
bin_key += '\0';
bin_key += "b";
string const bin_value(10, '\0');
c->put(bin_key, bin_value);
data = c->get_data(bin_key);
assert(data->value == bin_value);
}
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