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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/leveldb_proto/leveldb_database.h"
#include <string>
#include <vector>
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string_split.h"
#include "base/threading/thread_checker.h"
#include "third_party/leveldatabase/env_chromium.h"
#include "third_party/leveldatabase/src/include/leveldb/db.h"
#include "third_party/leveldatabase/src/include/leveldb/iterator.h"
#include "third_party/leveldatabase/src/include/leveldb/options.h"
#include "third_party/leveldatabase/src/include/leveldb/slice.h"
#include "third_party/leveldatabase/src/include/leveldb/status.h"
#include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
namespace leveldb_proto {
LevelDB::LevelDB() {}
LevelDB::~LevelDB() {
DFAKE_SCOPED_LOCK(thread_checker_);
}
bool LevelDB::InitWithOptions(const base::FilePath& database_dir,
const leveldb::Options& options) {
DFAKE_SCOPED_LOCK(thread_checker_);
std::string path = database_dir.AsUTF8Unsafe();
leveldb::DB* db = NULL;
leveldb::Status status = leveldb::DB::Open(options, path, &db);
if (status.IsCorruption()) {
base::DeleteFile(database_dir, true);
status = leveldb::DB::Open(options, path, &db);
}
if (status.ok()) {
CHECK(db);
db_.reset(db);
return true;
}
LOG(WARNING) << "Unable to open " << database_dir.value() << ": "
<< status.ToString();
return false;
}
bool LevelDB::Init(const base::FilePath& database_dir) {
leveldb::Options options;
options.create_if_missing = true;
options.max_open_files = 0; // Use minimum.
options.reuse_logs = leveldb_env::kDefaultLogReuseOptionValue;
return InitWithOptions(database_dir, options);
}
bool LevelDB::Save(const base::StringPairs& entries_to_save,
const std::vector<std::string>& keys_to_remove) {
DFAKE_SCOPED_LOCK(thread_checker_);
if (!db_) {
return false;
}
leveldb::WriteBatch updates;
for (base::StringPairs::const_iterator it = entries_to_save.begin();
it != entries_to_save.end();
++it) {
updates.Put(leveldb::Slice(it->first), leveldb::Slice(it->second));
}
for (std::vector<std::string>::const_iterator it = keys_to_remove.begin();
it != keys_to_remove.end(); ++it) {
updates.Delete(leveldb::Slice(*it));
}
leveldb::WriteOptions options;
options.sync = true;
leveldb::Status status = db_->Write(options, &updates);
if (status.ok()) return true;
DLOG(WARNING) << "Failed writing leveldb_proto entries: "
<< status.ToString();
return false;
}
bool LevelDB::Load(std::vector<std::string>* entries) {
DFAKE_SCOPED_LOCK(thread_checker_);
if (!db_) {
return false;
}
leveldb::ReadOptions options;
scoped_ptr<leveldb::Iterator> db_iterator(db_->NewIterator(options));
for (db_iterator->SeekToFirst(); db_iterator->Valid(); db_iterator->Next()) {
leveldb::Slice value_slice = db_iterator->value();
std::string entry(value_slice.data(), value_slice.size());
entries->push_back(entry);
}
return true;
}
} // namespace leveldb_proto
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