@Override
public BlockImpl getBlock(long blockId) {
BlockImpl block = lastBlock.get();
if (block.getId() == blockId) {
return block;
}
return BlockDb.findBlock(blockId);
}
@Override
public BlockImpl getLastBlock(int timestamp) {
BlockImpl block = lastBlock.get();
if (timestamp >= block.getTimestamp()) {
return block;
}
return BlockDb.findLastBlock(timestamp);
}
@Override
public BlockImpl getBlockAtHeight(int height) {
BlockImpl block = lastBlock.get();
if (height > block.getHeight()) {
throw new IllegalArgumentException(
"Invalid height " + height + ", current blockchain is at " + block.getHeight());
}
if (height == block.getHeight()) {
return block;
}
return BlockDb.findBlockAtHeight(height);
}
@Override
public List<BlockImpl> getBlocksAfter(long blockId, int limit) {
try (Connection con = Db.db.getConnection();
PreparedStatement pstmt =
con.prepareStatement(
"SELECT * FROM block WHERE db_id > (SELECT db_id FROM block WHERE id = ?) ORDER BY db_id ASC LIMIT ?")) {
List<BlockImpl> result = new ArrayList<>();
pstmt.setLong(1, blockId);
pstmt.setInt(2, limit);
pstmt.setFetchSize(100);
try (ResultSet rs = pstmt.executeQuery()) {
while (rs.next()) {
result.add(BlockDb.loadBlock(con, rs, true));
}
}
return result;
} catch (SQLException e) {
throw new RuntimeException(e.toString(), e);
}
}
@Override
public List<BlockImpl> getBlocksAfter(long blockId, List<Long> blockList) {
List<BlockImpl> result = new ArrayList<>();
if (blockList.isEmpty()) return result;
try (Connection con = Db.db.getConnection();
PreparedStatement pstmt =
con.prepareStatement(
"SELECT * FROM block WHERE db_id > (SELECT db_id FROM block WHERE id = ?) ORDER BY db_id ASC LIMIT ?")) {
pstmt.setLong(1, blockId);
pstmt.setInt(2, blockList.size());
pstmt.setFetchSize(100);
try (ResultSet rs = pstmt.executeQuery()) {
int index = 0;
while (rs.next()) {
BlockImpl block = BlockDb.loadBlock(con, rs, true);
if (block.getId() != blockList.get(index++)) break;
result.add(block);
}
}
return result;
} catch (SQLException e) {
throw new RuntimeException(e.toString(), e);
}
}
@Override
public boolean hasBlock(long blockId) {
return lastBlock.get().getId() == blockId || BlockDb.hasBlock(blockId);
}
