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Deal with LevelDB errors

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This commit is contained in:
Pieter Wuille
2013-01-29 01:44:19 +01:00
committed by Pieter Wuille
parent 7851033dd6
commit 421218d304
4 changed files with 74 additions and 39 deletions
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23
src/leveldb.h
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@@ -11,6 +11,14 @@
#include <boost/filesystem/path.hpp>
class leveldb_error : public std::runtime_error
{
public:
leveldb_error(const std::string &msg) : std::runtime_error(msg) {}
};
void HandleError(const leveldb::Status &status) throw(leveldb_error);
// Batch of changes queued to be written to a CLevelDB
class CLevelDBBatch
{
@@ -72,7 +80,7 @@ public:
CLevelDB(const boost::filesystem::path &path, size_t nCacheSize, bool fMemory = false, bool fWipe = false);
~CLevelDB();
template<typename K, typename V> bool Read(const K& key, V& value) {
template<typename K, typename V> bool Read(const K& key, V& value) throw(leveldb_error) {
CDataStream ssKey(SER_DISK, CLIENT_VERSION);
ssKey.reserve(ssKey.GetSerializeSize(key));
ssKey << key;
@@ -84,6 +92,7 @@ public:
if (status.IsNotFound())
return false;
printf("LevelDB read failure: %s\n", status.ToString().c_str());
HandleError(status);
}
try {
CDataStream ssValue(strValue.data(), strValue.data() + strValue.size(), SER_DISK, CLIENT_VERSION);
@@ -94,13 +103,13 @@ public:
return true;
}
template<typename K, typename V> bool Write(const K& key, const V& value, bool fSync = false) {
template<typename K, typename V> bool Write(const K& key, const V& value, bool fSync = false) throw(leveldb_error) {
CLevelDBBatch batch;
batch.Write(key, value);
return WriteBatch(batch, fSync);
}
template<typename K> bool Exists(const K& key) {
template<typename K> bool Exists(const K& key) throw(leveldb_error) {
CDataStream ssKey(SER_DISK, CLIENT_VERSION);
ssKey.reserve(ssKey.GetSerializeSize(key));
ssKey << key;
@@ -112,24 +121,25 @@ public:
if (status.IsNotFound())
return false;
printf("LevelDB read failure: %s\n", status.ToString().c_str());
HandleError(status);
}
return true;
}
template<typename K> bool Erase(const K& key, bool fSync = false) {
template<typename K> bool Erase(const K& key, bool fSync = false) throw(leveldb_error) {
CLevelDBBatch batch;
batch.Erase(key);
return WriteBatch(batch, fSync);
}
bool WriteBatch(CLevelDBBatch &batch, bool fSync = false);
bool WriteBatch(CLevelDBBatch &batch, bool fSync = false) throw(leveldb_error);
// not available for LevelDB; provide for compatibility with BDB
bool Flush() {
return true;
}
bool Sync() {
bool Sync() throw(leveldb_error) {
CLevelDBBatch batch;
return WriteBatch(batch, true);
}
@@ -141,4 +151,3 @@ public:
};
#endif // BITCOIN_LEVELDB_H