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Don't unload blocks if save failed

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Improve error handling in saveBlock()
This commit is contained in:
kwolekr 2014-07-07 01:20:25 -04:00
parent e14c4cdd4c
commit 8b3ed78e53
11 changed files with 108 additions and 67 deletions
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53
src/database-sqlite3.cpp
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@ -136,25 +136,24 @@ void Database_SQLite3::verifyDatabase() {
infostream<<"ServerMap: SQLite3 database opened"<<std::endl;
}
void Database_SQLite3::saveBlock(MapBlock *block)
bool Database_SQLite3::saveBlock(MapBlock *block)
{
DSTACK(__FUNCTION_NAME);
v3s16 p3d = block->getPos();
/*
Dummy blocks are not written
Dummy blocks are not written, but is not a save failure
*/
if(block->isDummy())
{
/*v3s16 p = block->getPos();
infostream<<"Database_SQLite3::saveBlock(): WARNING: Not writing dummy block "
<<"("<<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
return;
errorstream << "WARNING: saveBlock: Not writing dummy block "
<< PP(p3d) << std::endl;
return true;
}
// Format used for writing
u8 version = SER_FMT_VER_HIGHEST_WRITE;
// Get destination
v3s16 p3d = block->getPos();
#if 0
v2s16 p2d(p3d.X, p3d.Z);
@ -176,29 +175,39 @@ void Database_SQLite3::saveBlock(MapBlock *block)
std::ostringstream o(std::ios_base::binary);
o.write((char*)&version, 1);
o.write((char *)&version, 1);
// Write basic data
block->serialize(o, version, true);
// Write block to database
std::string tmp = o.str();
const char *bytes = tmp.c_str();
if(sqlite3_bind_int64(m_database_write, 1, getBlockAsInteger(p3d)) != SQLITE_OK)
errorstream<<"WARNING: Block position failed to bind: "<<sqlite3_errmsg(m_database)<<std::endl;
if(sqlite3_bind_blob(m_database_write, 2, (void *)bytes, o.tellp(), NULL) != SQLITE_OK) // TODO this mught not be the right length
errorstream<<"WARNING: Block data failed to bind: "<<sqlite3_errmsg(m_database)<<std::endl;
int written = sqlite3_step(m_database_write);
if(written != SQLITE_DONE)
errorstream<<"WARNING: Block failed to save ("<<p3d.X<<", "<<p3d.Y<<", "<<p3d.Z<<") "
<<sqlite3_errmsg(m_database)<<std::endl;
// Make ready for later reuse
sqlite3_reset(m_database_write);
if (sqlite3_bind_int64(m_database_write, 1, getBlockAsInteger(p3d)) != SQLITE_OK) {
errorstream << "WARNING: saveBlock: Block position failed to bind: "
<< PP(p3d) << ": " << sqlite3_errmsg(m_database) << std::endl;
sqlite3_reset(m_database_write);
return false;
}
if (sqlite3_bind_blob(m_database_write, 2, (void *)tmp.c_str(), tmp.size(), NULL) != SQLITE_OK) {
errorstream << "WARNING: saveBlock: Block data failed to bind: "
<< PP(p3d) << ": " << sqlite3_errmsg(m_database) << std::endl;
sqlite3_reset(m_database_write);
return false;
}
if (sqlite3_step(m_database_write) != SQLITE_DONE) {
errorstream << "WARNING: saveBlock: Block failed to save "
<< PP(p3d) << ": " << sqlite3_errmsg(m_database) << std::endl;
sqlite3_reset(m_database_write);
return false;
}
// We just wrote it to the disk so clear modified flag
block->resetModified();
sqlite3_reset(m_database_write);
return true;
}
MapBlock* Database_SQLite3::loadBlock(v3s16 blockpos)