swh:1:snp:5115096b921df712aeb2a08114fede57fb3331fb
Tip revision: dab9465c40b0a8fb7a59b461e516f27ff074274b authored by sdong on 25 March 2016, 19:09:20 UTC
Upgrade to 4.5.1
Upgrade to 4.5.1
Tip revision: dab9465
simple_example.cc
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#include <cstdio>
#include <string>
#include "rocksdb/db.h"
#include "rocksdb/slice.h"
#include "rocksdb/options.h"
using namespace rocksdb;
std::string kDBPath = "/tmp/rocksdb_simple_example";
int main() {
DB* db;
Options options;
// Optimize RocksDB. This is the easiest way to get RocksDB to perform well
options.IncreaseParallelism();
options.OptimizeLevelStyleCompaction();
// create the DB if it's not already present
options.create_if_missing = true;
// open DB
Status s = DB::Open(options, kDBPath, &db);
assert(s.ok());
// Put key-value
s = db->Put(WriteOptions(), "key1", "value");
assert(s.ok());
std::string value;
// get value
s = db->Get(ReadOptions(), "key1", &value);
assert(s.ok());
assert(value == "value");
// atomically apply a set of updates
{
WriteBatch batch;
batch.Delete("key1");
batch.Put("key2", value);
s = db->Write(WriteOptions(), &batch);
}
s = db->Get(ReadOptions(), "key1", &value);
assert(s.IsNotFound());
db->Get(ReadOptions(), "key2", &value);
assert(value == "value");
delete db;
return 0;
}