template <typename StorageSet,typename ReadSet> void mergeKeysFromStorageSet(StorageSet &ss, const ReadSet&other) {
int len = other.reads_size();
int sslen = ss.reads_size();
int i;
for (i=0;i<sslen;++i) {
mergeStorageKey(ss.mutable_reads(i),other.reads(i));
}
for (;i<len;++i) {
ss.add_reads();
mergeStorageKey(ss.mutable_reads(i),other.reads(i));
}
}
template <class ReadSet> SQLiteObjectStorage::Error SQLiteObjectStorage::applyReadSet(const SQLiteDBPtr& db, const ReadSet& rs, Protocol::Response&retval) {
int num_reads=rs.reads_size();
retval.clear_reads();
while (retval.reads_size()<num_reads)
retval.add_reads();
SQLiteObjectStorage::Error databaseError=None;
for (int rs_it=0;rs_it<num_reads;++rs_it) {
String object_hex = getTableName(rs.reads(rs_it));
String key_name = getKeyName(rs.reads(rs_it));
String value_query = "SELECT value FROM ";
value_query += "\"" TABLE_NAME "\"";
value_query += " WHERE object == x\'" + object_hex + "\' AND key == ?";
int rc;
char* remain;
sqlite3_stmt* value_query_stmt;
bool newStep=true;
bool locked=false;
rc = sqlite3_prepare_v2(db->db(), value_query.c_str(), -1, &value_query_stmt, (const char**)&remain);
SQLite::check_sql_error(db->db(), rc, NULL, "Error preparing value query statement");
if (rc==SQLITE_OK) {
rc = sqlite3_bind_text(value_query_stmt, 1, key_name.data(), (int)key_name.size(), SQLITE_TRANSIENT);
SQLite::check_sql_error(db->db(), rc, NULL, "Error binding key name to value query statement");
if (rc==SQLITE_OK) {
int step_rc = sqlite3_step(value_query_stmt);
while(step_rc == SQLITE_ROW) {
newStep=false;
retval.reads(rs_it).set_data((const char*)sqlite3_column_text(value_query_stmt, 0),sqlite3_column_bytes(value_query_stmt, 0));
step_rc = sqlite3_step(value_query_stmt);
}
if (step_rc != SQLITE_DONE) {
// reset the statement so it'll clean up properly
rc = sqlite3_reset(value_query_stmt);
SQLite::check_sql_error(db->db(), rc, NULL, "Error finalizing value query statement");
if (rc==SQLITE_LOCKED||rc==SQLITE_BUSY)
locked=true;
}
}
}
rc = sqlite3_finalize(value_query_stmt);
SQLite::check_sql_error(db->db(), rc, NULL, "Error finalizing value query statement");
if (locked||rc == SQLITE_LOCKED||rc==SQLITE_BUSY) {
retval.clear_reads();
return DatabaseLocked;
}
if (newStep) {
retval.reads(rs_it).clear_data();
retval.reads(rs_it).set_return_status(Protocol::StorageElement::KEY_MISSING);
}
if(rs.reads(rs_it).has_index()) {
retval.reads(rs_it).set_index(rs.reads(rs_it).index());
}
}
if (rs.has_options()&&(rs.options()&Protocol::ReadWriteSet::RETURN_READ_NAMES)!=0) {
// make sure read set is clear before each attempt
mergeKeysFromStorageSet( retval, rs );
}
return databaseError;
}