本文整理汇总了C++中leveldb::DB类的典型用法代码示例。如果您正苦于以下问题：C++ DB类的具体用法？C++ DB怎么用？C++ DB使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了DB类的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: None
Try<Option<Entry> > LevelDBStorageProcess::read(const string& name)
{
CHECK_NONE(error);
leveldb::ReadOptions options;
string value;
leveldb::Status status = db->Get(options, name, &value);
if (status.IsNotFound()) {
return None();
} else if (!status.ok()) {
return Error(status.ToString());
}
google::protobuf::io::ArrayInputStream stream(value.data(), value.size());
Entry entry;
if (!entry.ParseFromZeroCopyStream(&stream)) {
return Error("Failed to deserialize Entry");
}
return Some(entry);
}示例2: GetVIPCData
inline BOOL ConfDB::GetVIPCData(u32 nId, VSCVIPCData &pData)
{
VSCConfVIPCKey sChKey(nId);
leveldb::Slice key((char *)&sChKey, sizeof(sChKey));
leveldb::Iterator* it = m_pDb->NewIterator(leveldb::ReadOptions());
it->Seek(key);
leveldb::Slice sysValue;
if (it->Valid())
{
sysValue = it->value();
}
if (sysValue.size() != sizeof(VSCVIPCData))
{
VDC_DEBUG( "Device Can not find !!!\n");
delete it;
return FALSE;
}
memcpy(&pData, sysValue.data(), sizeof(VSCVIPCData));
// Check for any errors found during the scan
assert(it->status().ok());
delete it;
return TRUE;
}示例3: key
inline BOOL ConfDB::GetLicense(astring &strLicense)
{
VSCConfLicenseKey sLicKey;
leveldb::Slice key((char *)&sLicKey, sizeof(sLicKey));
leveldb::Iterator* it = m_pDb->NewIterator(leveldb::ReadOptions());
it->Seek(key);
leveldb::Slice sysValue;
if (it->Valid())
{
sysValue = it->value();
strLicense = sysValue.ToString();
}
// Check for any errors found during the scan
assert(it->status().ok());
delete it;
return TRUE;
}示例4: licKey
inline BOOL ConfDB::SetLicense(astring &strLicense)
{
VSCConfLicenseKey sLic;
leveldb::WriteOptions writeOptions;
leveldb::Slice licKey((char *)&sLic, sizeof(sLic));
leveldb::Slice licValue(strLicense);
m_pDb->Put(writeOptions, licKey, licValue);
return true;
}示例5: UpdateVIPCData
inline BOOL ConfDB::UpdateVIPCData(u32 nId, VSCVIPCData &pData)
{
VSCConfVIPCKey sChKey(nId);
leveldb::WriteOptions writeOptions;
leveldb::Slice chKey((char *)&sChKey, sizeof(sChKey));
leveldb::Slice chValue((char *)&pData, sizeof(VSCDeviceData));
m_pDb->Put(writeOptions, chKey, chValue);
return TRUE;
}示例6: sysKey
/* HDFS record */
inline s32 ConfDB::UpdateHdfsRecordData(VSCHdfsRecordData &pData)
{
VSCConfHdfsRecordKey sKey;
leveldb::WriteOptions writeOptions;
leveldb::Slice sysKey((char *)&sKey, sizeof(sKey));
leveldb::Slice sysValue((char *)&pData, sizeof(VSCHdfsRecordData));
m_pDb->Put(writeOptions, sysKey, sysValue);
return TRUE;
}示例7: initialize
void LevelDBStorageProcess::initialize()
{
leveldb::Options options;
options.create_if_missing = true;
leveldb::Status status = leveldb::DB::Open(options, path, &db);
if (!status.ok()) {
// TODO(benh): Consider trying to repair the DB.
error = status.ToString();
} else {
// TODO(benh): Conditionally compact to avoid long recovery times?
db->CompactRange(NULL, NULL);
}
}示例8: Failure
Future<std::set<string> > LevelDBStorageProcess::names()
{
if (error.isSome()) {
return Failure(error.get());
}
std::set<string> results;
leveldb::Iterator* iterator = db->NewIterator(leveldb::ReadOptions());
iterator->SeekToFirst();
while (iterator->Valid()) {
results.insert(iterator->key().ToString());
iterator->Next();
}
delete iterator;
return results;
}示例9: Error
Try<bool> LevelDBStorageProcess::write(const Entry& entry)
{
CHECK_NONE(error);
leveldb::WriteOptions options;
options.sync = true;
string value;
if (!entry.SerializeToString(&value)) {
return Error("Failed to serialize Entry");
}
leveldb::Status status = db->Put(options, entry.name(), value);
if (!status.ok()) {
return Error(status.ToString());
}
return true;
}示例10: GetSystemConf
inline BOOL ConfDB::GetSystemConf(VSCConfData &pSys)
{
VSCConfSystemKey sSysKey;
leveldb::Slice key((char *)&sSysKey, sizeof(sSysKey));
leveldb::Iterator* it = m_pDb->NewIterator(leveldb::ReadOptions());
it->Seek(key);
leveldb::Slice sysValue;
if (it->Valid())
{
sysValue = it->value();
}
if (sysValue.size() != sizeof(VSCConfData))
{
VDC_DEBUG( "System Config is not init\n");
delete it;
memset(&pSys, 0, sizeof(VSCConfData));
SysConfDataDefault(pSys);
UpdateSysData(pSys);
astring strLicense = " ";
SetLicense(strLicense);//set the default license
/* Call get system again */
return TRUE;
}
memcpy(&pSys, sysValue.data(), sizeof(VSCConfData));
// Check for any errors found during the scan
assert(it->status().ok());
delete it;
return TRUE;
}示例11: GetHdfsRecordConf
inline BOOL ConfDB::GetHdfsRecordConf(VSCHdfsRecordData &pData)
{
VSCConfHdfsRecordKey sKey;
leveldb::Slice key((char *)&sKey, sizeof(sKey));
leveldb::Iterator* it = m_pDb->NewIterator(leveldb::ReadOptions());
it->Seek(key);
leveldb::Slice sysValue;
if (it->Valid())
{
sysValue = it->value();
}
if (sysValue.size() != sizeof(VSCHdfsRecordData))
{
VDC_DEBUG( "Hdfs Record Config is not init\n");
delete it;
memset(&pData, 0, sizeof(VSCHdfsRecordData));
VSCHdfsRecordDataItemDefault(pData.data.conf);
UpdateHdfsRecordData(pData);
/* Call get system again */
return TRUE;
}
memcpy(&pData, sysValue.data(), sizeof(VSCHdfsRecordData));
// Check for any errors found during the scan
assert(it->status().ok());
delete it;
return TRUE;
}示例12: load
void load(unsigned short bamIndex)
{
size_t n_reads=0;
std::string value;
bam1_t *b= bam_init1();
index2chromNames.resize(bamIndex+1);
WHERE(in->header);
for(int32_t i=0;i< in->header->n_targets;++i)
{
string target_name(in->header->target_name[i]);
index2chromNames.back().push_back(target_name);
}
while(samread(this->in, b) > 0) /* loop over the records */
{
std::auto_ptr<vector<Hit> > hits(0);
Bam1Sequence seq(b);
leveldb::Slice key1(seq.name());
value.clear();
WHERE(n_reads);
leveldb::Status status = db->Get(this->read_options, key1, &value);
if(!status.ok())
{
hits.reset(new vector<Hit>());
n_reads++;
if(n_reads%1000000UL==0)
{
clog << n_reads << endl;
//break;//TODO
}
}
else
{
hits=decode(value);
}
Hit hit;
hit.bamIndex=bamIndex;
hit.tid = seq.tid();
hit.pos = seq.pos();
hit.flag = seq.flag();
hits->push_back(hit);
std::auto_ptr<string> encoded = this->encode(hits.get());
leveldb::Slice value1(encoded->data(),encoded->size());
status = db->Put(this->write_options, key1, value1);
if(!status.ok())
{
cerr << "Cannot insert into db" << endl;
break;
}
}
bam_destroy1(b);
}示例13: Get
Status Get(const std::string& key, std::string* value)
{
leveldb::Status s = db->Get(leveldb::ReadOptions(), key, value);
if (s.ok())
{
return Status::OK();
}
return Status::NotFound();
}示例14: Delete
Status Delete(const std::string& key)
{
leveldb::Status s = db->Delete(leveldb::WriteOptions(), key);
if (s.ok())
{
return Status::OK();
}
return Status::NotFound();
}示例15: Put
Status Put(const std::string& key, const std::string& value)
{
leveldb::Status s = db->Put(leveldb::WriteOptions(), key, value);
if (s.ok())
{
return Status::OK();
}
std::cerr << s.ToString() << std::endl;
return Status::NotFound();
}