1 // Copyright (c) 2012-2014 The Bitcoin developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 #include "leveldbwrapper.h"
9 #include <boost/filesystem.hpp>
11 #include <leveldb/cache.h>
12 #include <leveldb/env.h>
13 #include <leveldb/filter_policy.h>
16 void HandleError(const leveldb::Status& status) throw(leveldb_error)
20 LogPrintf("%s\n", status.ToString());
21 if (status.IsCorruption())
22 throw leveldb_error("Database corrupted");
23 if (status.IsIOError())
24 throw leveldb_error("Database I/O error");
25 if (status.IsNotFound())
26 throw leveldb_error("Database entry missing");
27 throw leveldb_error("Unknown database error");
30 static leveldb::Options GetOptions(size_t nCacheSize)
32 leveldb::Options options;
33 options.block_cache = leveldb::NewLRUCache(nCacheSize / 2);
34 options.write_buffer_size = nCacheSize / 4; // up to two write buffers may be held in memory simultaneously
35 options.filter_policy = leveldb::NewBloomFilterPolicy(10);
36 options.compression = leveldb::kNoCompression;
37 options.max_open_files = 64;
38 if (leveldb::kMajorVersion > 1 || (leveldb::kMajorVersion == 1 && leveldb::kMinorVersion >= 16)) {
39 // LevelDB versions before 1.16 consider short writes to be corruption. Only trigger error
40 // on corruption in later versions.
41 options.paranoid_checks = true;
46 CLevelDBWrapper::CLevelDBWrapper(const boost::filesystem::path& path, size_t nCacheSize, bool fMemory, bool fWipe)
49 readoptions.verify_checksums = true;
50 iteroptions.verify_checksums = true;
51 iteroptions.fill_cache = false;
52 syncoptions.sync = true;
53 options = GetOptions(nCacheSize);
54 options.create_if_missing = true;
56 penv = leveldb::NewMemEnv(leveldb::Env::Default());
60 LogPrintf("Wiping LevelDB in %s\n", path.string());
61 leveldb::DestroyDB(path.string(), options);
63 TryCreateDirectory(path);
64 LogPrintf("Opening LevelDB in %s\n", path.string());
66 leveldb::Status status = leveldb::DB::Open(options, path.string(), &pdb);
68 LogPrintf("Opened LevelDB successfully\n");
71 CLevelDBWrapper::~CLevelDBWrapper()
75 delete options.filter_policy;
76 options.filter_policy = NULL;
77 delete options.block_cache;
78 options.block_cache = NULL;
83 bool CLevelDBWrapper::WriteBatch(CLevelDBBatch& batch, bool fSync) throw(leveldb_error)
85 leveldb::Status status = pdb->Write(fSync ? syncoptions : writeoptions, &batch.batch);