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并发访问SQLite Da(concurrent access SQLite Da)

我正在开发一个包含3个部分的应用程序: - JavaFX桌面应用程序。 - Java Server WebApp - AndroidApp

我使用Hibernate映射SQLite数据库。

但是当桌面应用程序打开并尝试通过服务器从AndroidApp插入新的ibject时,它会给我一个错误: java.sql.SQLException: database is locked

我的hibernate.cfg.xml文件:

<property name="show_sql">true</property>
<property name="format_sql">true</property>
    <property name="dialect">dialect.SQLiteDialect</property>
    <property name="connection.driver_class">org.sqlite.JDBC</property>
    <property name="connection.url">jdbc:sqlite:grainsa_provisional.sqlite</property>
    <property name="connection.username"></property>
    <property name="connection.password"></property>

和我的“对象管理器”,在服务器和桌面上的方式相同:

private Session mSession;
private Transaction mTransaction;

private void initQuery() throws HibernateException {
    mSession = HibernateUtil.getSessionFactory().openSession();
    mTransaction = mSession.beginTransaction();
}

private void manejaExcepcion(HibernateException hibernateException) {
    mTransaction.rollback();
    throw new HibernateException("ha ocurrido un error con la Base de Datos!!!", hibernateException);
}


public Conductor selectConductorByID(Integer id) {
    Conductor conductor = new Conductor();
    try{
        initQuery();
        conductor = (Conductor) mSession.get(Conductor.class, id);
    } catch (HibernateException e){
        manejaExcepcion(e);
        throw e;
    } finally {
        mSession.close();
    }
    return conductor;
}

如果您需要更多信息,请询问!

我做错了什么?

谢谢大家,对不起我的英语!

编辑:思考改变mi桌面JavaFX应用程序的访问模式以通过服务器进行查询,但这需要我很多时间,而且我认为这不是最好的方法。

Edit2:这是打开,查询和关闭conatabion到databasa锁定/查询/解锁的正确方法吗?

private void initQuery() throws HibernateException {
    mSession = HibernateUtil.getSessionFactory().openSession();
    mTransaction = mSession.beginTransaction();
}

private void manejaExcepcion(HibernateException hibernateException) {
    mTransaction.rollback();
    throw new HibernateException("ha ocurrido un error con la Base de Datos!!!", hibernateException);
}


public Conductor selectConductorByID(Integer id) {
    Conductor conductor = new Conductor();
    try{
        initQuery();
        conductor = (Conductor) mSession.get(Conductor.class, id);
    } catch (HibernateException e){
        manejaExcepcion(e);
        throw e;
    } finally {
        mSession.close();
    }
    return conductor;
}

请帮忙! 再次感谢! 我有点沮丧......


I´m developing an app with 3 parts: - JavaFX Desktop app. - Java Server WebApp - AndroidApp

I´m using Hibernate for mapping a SQLite Database.

But when the desktop app is open and try to insert a new ibject from the AndroidApp throug the Server it gives me an error: java.sql.SQLException: database is locked

My hibernate.cfg.xml file:

<property name="show_sql">true</property>
<property name="format_sql">true</property>
    <property name="dialect">dialect.SQLiteDialect</property>
    <property name="connection.driver_class">org.sqlite.JDBC</property>
    <property name="connection.url">jdbc:sqlite:grainsa_provisional.sqlite</property>
    <property name="connection.username"></property>
    <property name="connection.password"></property>

And my "Objects Manager",the same way in the Server and in the Desktop by example:

private Session mSession;
private Transaction mTransaction;

private void initQuery() throws HibernateException {
    mSession = HibernateUtil.getSessionFactory().openSession();
    mTransaction = mSession.beginTransaction();
}

private void manejaExcepcion(HibernateException hibernateException) {
    mTransaction.rollback();
    throw new HibernateException("ha ocurrido un error con la Base de Datos!!!", hibernateException);
}


public Conductor selectConductorByID(Integer id) {
    Conductor conductor = new Conductor();
    try{
        initQuery();
        conductor = (Conductor) mSession.get(Conductor.class, id);
    } catch (HibernateException e){
        manejaExcepcion(e);
        throw e;
    } finally {
        mSession.close();
    }
    return conductor;
}

If you need more information please ask!

What i´m doing wrong?

Thanks everyone and sorry about my english!

Edit: ím thinking to change the acces mode of mi desktop JavaFX app to make the query through the server, but it will take me alot of time, and i do not think that is the best way to do it..

Edit2: This is the right way to open, make query and close the conexion to the databasa to lock/query/unlock?

private void initQuery() throws HibernateException {
    mSession = HibernateUtil.getSessionFactory().openSession();
    mTransaction = mSession.beginTransaction();
}

private void manejaExcepcion(HibernateException hibernateException) {
    mTransaction.rollback();
    throw new HibernateException("ha ocurrido un error con la Base de Datos!!!", hibernateException);
}


public Conductor selectConductorByID(Integer id) {
    Conductor conductor = new Conductor();
    try{
        initQuery();
        conductor = (Conductor) mSession.get(Conductor.class, id);
    } catch (HibernateException e){
        manejaExcepcion(e);
        throw e;
    } finally {
        mSession.close();
    }
    return conductor;
}

Please help! and thanks again! I´m a little bit deseperated...


原文:https://stackoverflow.com/questions/22741382
更新时间:2024-01-29 09:01

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