我有一個運行在多臺計算機上的Java應用程序,它們都連接到同一個MySQL數據庫。我需要事務來確保數據庫正確更新。Java和MySQL交易
我有解鎖問題。下面是代碼:
public boolean bookSeats(int numeroSala, Calendar dataOra, List<Posto> posti) {
JDBConnection connection = JDBConnection.getDbConnection();
Connection conn = connection.conn;
java.sql.Date javaSqlDate = new java.sql.Date(dataOra.getTime().getTime());
java.sql.Time javaSqlTime = new java.sql.Time(dataOra.getTime().getTime());
try {
conn.setAutoCommit(false);
conn.setTransactionIsolation(Connection.TRANSACTION_SERIALIZABLE);
} catch (SQLException e) {
e.printStackTrace();
}
try
{
Posto p = null;
ListIterator<Posto> itr = posti.listIterator();
PreparedStatement stmt = null;
stmt = conn.prepareStatement(
"INSERT INTO sala?_tickets " +
"(giornoSpettacolo, orarioSpettacolo, fila, posto) " +
"VALUES (?, ?, ?, ?)");
stmt.setInt(1, numeroSala);
while(itr.hasNext())
{
p = itr.next();
stmt.setString(2, javaSqlDate.toString()); // giornoSpettacolo
stmt.setString(3, javaSqlTime.toString()); // orarioSpettacolo
stmt.setInt(4, p.getFila()); // fila
stmt.setInt(5, p.getNumero()); // posto
stmt.addBatch();
}
stmt.executeBatch();
conn.commit();
return true;
}
catch (SQLException e) {
e.printStackTrace();
}
return false;
}
這種方法效果很好,但是當我試圖在同一時間執行這一另一臺計算機上,我得到即使conn.commit()
完成死鎖錯誤。
只要我關閉第一個應用程序,其他應用程序就可以運行沒有死鎖錯誤的方法。這似乎是COMMIT不釋放鎖?
處理謝謝,這個固定我的問題! – Gotenks