Springframework-Note

2018-03-08 springframework

  • springframework事物回滚注意事项

    • throw

      • must to throw something out of method, that springfamework can know that it need to rollback.
      • spring will rollback all transactions in the method even though only one transaction is error

      • example:

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        Item item = new Item();
        item.setBarcode("28");
        item.setTitle("超越无限");
        item.setDescription("身为风帆, 总要拓展");
        List<Item> itemList1 = new ArrayList<>();
        List<Item> itemList2 = new ArrayList<>();
        itemList1.add(item);
        try {
            itemMapper.insertItems(itemList1);
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }
        try {
            itemMapper.insertItems(itemList2);
        } catch (Exception e) {

        e.printStackTrace();
        throw e;
        }

        1
        spring will rollback both itemList1 and itemList2 even only itemList2 is wrong

        Item item = new Item();
        item.setBarcode(“28”);
        item.setTitle(“超越无限”);
        item.setDescription(“身为风帆, 总要拓展”);
        List itemList1 = new ArrayList<>();
        List itemList2 = new ArrayList<>();
        itemList1.add(item);
        try {
        itemMapper.insertItems(itemList1);

        try {
    itemMapper.insertItems(itemList2);
} catch (Exception e) {
    e.printStackTrace();
    throw e;
}

        } catch (Exception e) {
        e.printStackTrace();
        throw e;
        }
        `
        spring will rollback itemList1 even itemList1 doesn’t throw expection, because itemList2 throws