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db: Make reusable base class for index databases.

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This commit is contained in:
Jim Posen 2018-05-15 14:57:22 -07:00
parent 9b0ec1a7f9
commit e5af5fc6fb
2 changed files with 21 additions and 10 deletions
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10
src/txdb.cpp
View File

@ -415,8 +415,12 @@ bool CCoinsViewDB::Upgrade() {
return !ShutdownRequested();
}
BaseIndexDB::BaseIndexDB(const fs::path& path, size_t n_cache_size, bool f_memory, bool f_wipe, bool f_obfuscate) :
CDBWrapper(path, n_cache_size, f_memory, f_wipe, f_obfuscate)
{}
TxIndexDB::TxIndexDB(size_t n_cache_size, bool f_memory, bool f_wipe) :
CDBWrapper(GetDataDir() / "indexes" / "txindex", n_cache_size, f_memory, f_wipe)
BaseIndexDB(GetDataDir() / "indexes" / "txindex", n_cache_size, f_memory, f_wipe)
{}
bool TxIndexDB::ReadTxPos(const uint256 &txid, CDiskTxPos& pos) const
@ -433,7 +437,7 @@ bool TxIndexDB::WriteTxs(const std::vector<std::pair<uint256, CDiskTxPos>>& v_po
return WriteBatch(batch);
}
bool TxIndexDB::ReadBestBlock(CBlockLocator& locator) const
bool BaseIndexDB::ReadBestBlock(CBlockLocator& locator) const
{
bool success = Read(DB_BEST_BLOCK, locator);
if (!success) {
@ -442,7 +446,7 @@ bool TxIndexDB::ReadBestBlock(CBlockLocator& locator) const
return success;
}
bool TxIndexDB::WriteBestBlock(const CBlockLocator& locator)
bool BaseIndexDB::WriteBestBlock(const CBlockLocator& locator)
{
return Write(DB_BEST_BLOCK, locator);
}

21
src/txdb.h
View File

@ -123,6 +123,19 @@ public:
bool LoadBlockIndexGuts(const Consensus::Params& consensusParams, std::function<CBlockIndex*(const uint256&)> insertBlockIndex);
};
class BaseIndexDB : public CDBWrapper
{
public:
BaseIndexDB(const fs::path& path, size_t n_cache_size,
bool f_memory = false, bool f_wipe = false, bool f_obfuscate = false);
/// Read block locator of the chain that the index is in sync with.
bool ReadBestBlock(CBlockLocator& locator) const;
/// Write block locator of the chain that the index is in sync with.
bool WriteBestBlock(const CBlockLocator& locator);
};
/**
* Access to the txindex database (indexes/txindex/)
*
@ -132,7 +145,7 @@ public:
* and block index entries may not be flushed to disk until after this database
* is updated.
*/
class TxIndexDB : public CDBWrapper
class TxIndexDB : public BaseIndexDB
{
public:
explicit TxIndexDB(size_t n_cache_size, bool f_memory = false, bool f_wipe = false);
@ -144,12 +157,6 @@ public:
/// Write a batch of transaction positions to the DB.
bool WriteTxs(const std::vector<std::pair<uint256, CDiskTxPos>>& v_pos);
/// Read block locator of the chain that the txindex is in sync with.
bool ReadBestBlock(CBlockLocator& locator) const;
/// Write block locator of the chain that the txindex is in sync with.
bool WriteBestBlock(const CBlockLocator& locator);
/// Migrate txindex data from the block tree DB, where it may be for older nodes that have not
/// been upgraded yet to the new database.
bool MigrateData(CBlockTreeDB& block_tree_db, const CBlockLocator& best_locator);