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; }
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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; }
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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