Java 类org.hibernate.context.CurrentSessionContext 实例源码

private CurrentSessionContext buildCurrentSessionContext() {
    String impl = properties.getProperty( Environment.CURRENT_SESSION_CONTEXT_CLASS );
    // for backward-compatability
    if ( impl == null && transactionManager != null ) {
        impl = "jta";
    }

    if ( impl == null ) {
        return null;
    }
    else if ( "jta".equals( impl ) ) {
        if ( settings.getTransactionFactory().areCallbacksLocalToHibernateTransactions() ) {
            log.warn( "JTASessionContext being used with JDBCTransactionFactory; auto-flush will not operate correctly with getCurrentSession()" );
        }
        return new JTASessionContext( this );
    }
    else if ( "thread".equals( impl ) ) {
        return new ThreadLocalSessionContext( this );
    }
    else if ( "managed".equals( impl ) ) {
        return new ManagedSessionContext( this );
    }
    else {
        try {
            Class implClass = ReflectHelper.classForName( impl );
            return ( CurrentSessionContext ) implClass
                    .getConstructor( new Class[] { SessionFactoryImplementor.class } )
                    .newInstance( new Object[] { this } );
        }
        catch( Throwable t ) {
            log.error( "Unable to construct current session context [" + impl + "]", t );
            return null;
        }
    }
}