Another reorganization
diff --git a/src/sync-log.cc b/src/sync-log.cc
new file mode 100644
index 0000000..99b652c
--- /dev/null
+++ b/src/sync-log.cc
@@ -0,0 +1,219 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ * Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ */
+
+#include "sync-log.h"
+
+#include <boost/make_shared.hpp>
+
+using namespace boost;
+using namespace std;
+
+HashPtr
+SyncLog::RememberStateInStateLog ()
+{
+ int res = sqlite3_exec (m_db, "BEGIN TRANSACTION;", 0,0,0);
+
+ res += sqlite3_exec (m_db, "\
+INSERT INTO SyncLog \
+ (state_hash, last_update) \
+ SELECT \
+ hash(device_name, seq_no), datetime('now') \
+ FROM SyncNodes \
+ ORDER BY device_name; \
+", 0,0,0);
+
+ if (res != SQLITE_OK)
+ {
+ BOOST_THROW_EXCEPTION (Error::Db ()
+ << errmsg_info_str ("1"));
+ }
+
+ sqlite3_int64 rowId = sqlite3_last_insert_rowid (m_db);
+
+ sqlite3_stmt *insertStmt;
+ res += sqlite3_prepare (m_db, "\
+INSERT INTO SyncStateNodes \
+ (state_id, device_id, seq_no) \
+ SELECT ?, device_id, seq_no \
+ FROM SyncNodes; \
+", -1, &insertStmt, 0);
+
+ res += sqlite3_bind_int64 (insertStmt, 1, rowId);
+ sqlite3_step (insertStmt);
+
+ if (res != SQLITE_OK)
+ {
+ BOOST_THROW_EXCEPTION (Error::Db ()
+ << errmsg_info_str ("4"));
+ }
+ sqlite3_finalize (insertStmt);
+
+ sqlite3_stmt *getHashStmt;
+ res += sqlite3_prepare (m_db, "\
+SELECT state_hash FROM SyncLog WHERE state_id = ?\
+", -1, &getHashStmt, 0);
+ res += sqlite3_bind_int64 (getHashStmt, 1, rowId);
+
+ HashPtr retval;
+ int stepRes = sqlite3_step (getHashStmt);
+ if (stepRes == SQLITE_ROW)
+ {
+ retval = make_shared<Hash> (sqlite3_column_blob (getHashStmt, 0),
+ sqlite3_column_bytes (getHashStmt, 0));
+ }
+ sqlite3_finalize (getHashStmt);
+ res += sqlite3_exec (m_db, "COMMIT;", 0,0,0);
+
+ if (res != SQLITE_OK)
+ {
+ BOOST_THROW_EXCEPTION (Error::Db ()
+ << errmsg_info_str ("Some error with rememberStateInStateLog"));
+ }
+
+ return retval;
+}
+
+sqlite3_int64
+SyncLog::LookupSyncLog (const std::string &stateHash)
+{
+ return LookupSyncLog (*Hash::FromString (stateHash));
+}
+
+sqlite3_int64
+SyncLog::LookupSyncLog (const Hash &stateHash)
+{
+ sqlite3_stmt *stmt;
+ int res = sqlite3_prepare (m_db, "SELECT state_id FROM SyncLog WHERE state_hash = ?",
+ -1, &stmt, 0);
+
+ if (res != SQLITE_OK)
+ {
+ BOOST_THROW_EXCEPTION (Error::Db ()
+ << errmsg_info_str ("Cannot prepare statement"));
+ }
+
+ res = sqlite3_bind_blob (stmt, 1, stateHash.GetHash (), stateHash.GetHashBytes (), SQLITE_STATIC);
+ if (res != SQLITE_OK)
+ {
+ BOOST_THROW_EXCEPTION (Error::Db ()
+ << errmsg_info_str ("Cannot bind"));
+ }
+
+ sqlite3_int64 row = 0; // something bad
+
+ if (sqlite3_step (stmt) == SQLITE_ROW)
+ {
+ row = sqlite3_column_int64 (stmt, 0);
+ }
+
+ sqlite3_finalize (stmt);
+
+ return row;
+}
+
+void
+SyncLog::UpdateDeviceSeqno (const std::string &name, uint64_t seqNo)
+{
+ sqlite3_stmt *stmt;
+ // update is performed using trigger
+ int res = sqlite3_prepare (m_db, "INSERT INTO SyncNodes (device_name, seq_no) VALUES (?,?);",
+ -1, &stmt, 0);
+
+ res += sqlite3_bind_text (stmt, 1, name.c_str (), name.size (), SQLITE_STATIC);
+ res += sqlite3_bind_int64 (stmt, 2, seqNo);
+ sqlite3_step (stmt);
+
+ if (res != SQLITE_OK)
+ {
+ BOOST_THROW_EXCEPTION (Error::Db ()
+ << errmsg_info_str ("Some error with UpdateDeviceSeqno"));
+ }
+ sqlite3_finalize (stmt);
+}
+
+void
+SyncLog::FindStateDifferences (const std::string &oldHash, const std::string &newHash)
+{
+ FindStateDifferences (*Hash::FromString (oldHash), *Hash::FromString (newHash));
+}
+
+void
+SyncLog::FindStateDifferences (const Hash &oldHash, const Hash &newHash)
+{
+ sqlite3_stmt *stmt;
+
+ int res = sqlite3_prepare_v2 (m_db, "\
+SELECT sn.device_name, s_old.seq_no, s_new.seq_no \
+ FROM (SELECT * \
+ FROM SyncStateNodes \
+ WHERE state_id=(SELECT state_id \
+ FROM SyncLog \
+ WHERE state_hash=:old_hash)) s_old \
+ LEFT JOIN (SELECT * \
+ FROM SyncStateNodes \
+ WHERE state_id=(SELECT state_id \
+ FROM SyncLog \
+ WHERE state_hash=:new_hash)) s_new \
+ \
+ ON s_old.device_id = s_new.device_id \
+ JOIN SyncNodes sn ON sn.device_id = s_old.device_id \
+ \
+ WHERE s_new.seq_no IS NULL OR \
+ s_old.seq_no != s_new.seq_no \
+ \
+UNION ALL \
+ \
+SELECT sn.device_name, s_old.seq_no, s_new.seq_no \
+ FROM (SELECT * \
+ FROM SyncStateNodes \
+ WHERE state_id=(SELECT state_id \
+ FROM SyncLog \
+ WHERE state_hash=:new_hash )) s_new \
+ LEFT JOIN (SELECT * \
+ FROM SyncStateNodes \
+ WHERE state_id=(SELECT state_id \
+ FROM SyncLog \
+ WHERE state_hash=:old_hash)) s_old \
+ \
+ ON s_old.device_id = s_new.device_id \
+ JOIN SyncNodes sn ON sn.device_id = s_new.device_id \
+ \
+ WHERE s_old.seq_no IS NULL \
+", -1, &stmt, 0);
+
+ if (res != SQLITE_OK)
+ {
+ BOOST_THROW_EXCEPTION (Error::Db ()
+ << errmsg_info_str ("Some error with FindStateDifferences"));
+ }
+
+ res += sqlite3_bind_blob (stmt, 1, oldHash.GetHash (), oldHash.GetHashBytes (), SQLITE_STATIC);
+ res += sqlite3_bind_blob (stmt, 2, newHash.GetHash (), newHash.GetHashBytes (), SQLITE_STATIC);
+
+ while (sqlite3_step (stmt) == SQLITE_ROW)
+ {
+ std::cout << sqlite3_column_text (stmt, 0) <<
+ ": from " << sqlite3_column_int64 (stmt, 1) <<
+ " to " << sqlite3_column_int64 (stmt, 2) <<
+ std::endl;
+ }
+ sqlite3_finalize (stmt);
+}