小编Akh*_*esh的帖子

我了解到JNI接口指针(JNIEnv*)仅在当前线程中有效.假设我在本机方法中启动了一个新线程; 它如何异步发送事件到Java方法？由于这个新线程不能有(JNIEnv*)的引用.为(JNIEnv*)存储全局变量显然不起作用？

我一直在尝试以编程方式配置appender,但到目前为止还没有获得成功.我只想配置没有文件的appender,以便它可以将日志发送到控制台或文件.

    String PATTERN = "%d [%p|%c|%C{1}] %m%n";
    PatternLayout layout = PatternLayout.createLayout(PATTERN, null, null,
            null, null, null);
    ConsoleAppender console = ConsoleAppender.createAppender(layout, null,
            null, "console", "true", "true"); // create appender

    AppenderRef appender = AppenderRef.createAppenderRef("console",
            "DEBUG", null);

    logger = (Logger) LogManager.getLogger(InitLogger.class);
    LoggerContext context = logger.getContext();
    BaseConfiguration configuration =(BaseConfiguration) context.getConfiguration();
    configuration.addAppender(console);
    logger.addAppender(configuration.getAppender("console"));

我有三个关系UserDetailshasmany FiledTask和TaskhasMany的实体FiledTask.我想要的只是FiledTask特别的清单User

对于UserDetails:

@OneToMany(mappedBy="user",cascade=CascadeType.ALL)
Collection<FiledTask> filedTasks = new ArrayList<FiledTask>();

对于我的任务

@OneToMany(mappedBy="task")
Collection<FiledTask> filedTasks = new ArrayList<FiledTask>();

和FiledTask看起来像

@ManyToOne
@JoinColumn(nullable = false, name = "taskId")
private Tasks task;
@ManyToOne
@JoinColumn(nullable = false, name = "userId")
private UserDetails user;

我试过了

query = session.createQuery("from Tasks as tasks inner join tasks.filedTasks as files with files.user = :user");
query.setParameter("user", user); //user is UserDetails instance

但我得到的错误子句只能引用驱动表中的列,意味着FiledTask不能用userId进行比较？

with clause can only reference columns in the driving table …