/** * Prepare a transaction. * * @param session the session * @param transaction the name of the transaction */ void prepareCommit(Session session, String transaction) { if (trace.isDebugEnabled()) { trace.debug("log prepare commit s: " + session.getId() + ", " + transaction); } if (store.getDatabase().getPageStore() == null) { // database already closed return; } // store it on a separate log page int pageSize = store.getPageSize(); pageOut.flush(); pageOut.fillPage(); Data buffer = getBuffer(); buffer.writeByte((byte) PREPARE_COMMIT); buffer.writeVarInt(session.getId()); buffer.writeString(transaction); if (buffer.length() >= PageStreamData.getCapacity(pageSize)) { throw DbException.getInvalidValueException("transaction name (too long)", transaction); } write(buffer); // store it on a separate log page flushOut(); pageOut.fillPage(); if (store.getDatabase().getFlushOnEachCommit()) { flush(); } }
/** Switch to a new log section. */ void checkpoint() { Data buffer = getBuffer(); buffer.writeByte((byte) CHECKPOINT); write(buffer); undo = new BitField(); logSectionId++; logPos = 0; pageOut.flush(); pageOut.fillPage(); int currentDataPage = pageOut.getCurrentDataPageId(); logSectionPageMap.put(logSectionId, currentDataPage); }
private void flushOut() { pageOut.flush(); }