为什么Session.CLIENT_ACKNOWLEDGE不受尊重?

时间:2013-10-09 16:01:01

标签: java session java-ee glassfish jms

我尝试使用Session.CLIENT_ACKNOWLEDGE作为确认模式启动无事务JMS会话。

不幸的是,当我开始会话时,确认模式始终为Session.AUTO_ACKNOWLEDGE。为什么?

我正在从远程glassfish客户端连接到glassfish服务器(使用标准的嵌入式OpenMQ代理)。会话初始化代码是

    boolean transacted = false;
    int acknowledgeMode = Session.CLIENT_ACKNOWLEDGE;
    session = getConnection().createSession(transacted, acknowledgeMode);
    if(transacted!=session.getTransacted())
        throw new UnsupportedOperationException("seems like the broker doesn't want us to use untransacted connection");
    if(acknowledgeMode!=session.getAcknowledgeMode())
        throw new UnsupportedOperationException("seems like the broker doesn't want us to use Session.CLIENT_ACKNOWLEDGE");

[编辑1]

Session是从Connection / ConnectionFactory对中获取的,其中使用JNDI查找connectionFactory:

connectionFactory = (ConnectionFactory) getContext().lookup(JMSConstants.CONNECTION_FACTORY_NAME);

所以我确实可以使用远程连接工厂的默认设置as @raffian suggested

1 个答案:

答案 0 :(得分:0)

测试是否有疑问?或者不是?

因此,为了调查这一点,我创建了一个单元测试,在其中我创建了一个会话,然后检查getTransacted()getAcknowledgeMode()的值。

这个测试显然证实了我问上方的问题,那就是说在Session.CLIENT_ACKNOWLEDGE配置的JMS会话中输入Session.AUTO_ACKNOWLEDGE结果......什么?

是的,我也完全惊呆了。

这是龙

所以我做了你在Glassfish玩的时候应该做的事情。我安装了最新版本的Jadclipse并重新开始我的测试,尽我所能调试。

创建ConnectionFactory似乎没问题

创建Connection似乎也没问题

但是创建会话就是从那个代码开始的(从我在com.sun.messaging.jms.ra.ConnectionAdapter的Jadclipse会话中再现 - 看看ConnectionAdapter#createSession)。

 if (ResourceAdapter._isFixCR6760301())
 {
   localXASessionImpl = (XASessionImpl)this.xac.createSession(overrideTransacted(paramBoolean), overrideAcknowledgeMode(paramInt), (this.inACC) ? null : this.mc);
 }
 else {
   localXASessionImpl = (XASessionImpl)this.xac.createSession((this.mc.xaTransactionStarted()) ? true : paramBoolean, paramInt, (this.inACC) ? null : this.mc);
 }

显然,我的确认模式是通过调用ConnectionAdapter#overrideAcknowledgeMode的优雅来重写的。希望grepCode中的代码具有这个非常有用的评论,真正让我的一天

        // EJB spec section 13.3.5 "Use of JMS APIs in Transactions" says
        // "The Bean Provider should not use the JMS acknowledge method either within a transaction 
        // or within an unspecified transaction context. Message acknowledgment in an unspecified 
        // transaction context is handled by the container." 
        // 
        // The same restriction applies in web container: JavaEE Spec: "EE.6.7 Java Message Service (JMS) 1.1 Requirements" says
        // "In general, the behavior of a JMS provider should be the same in both the EJB container and the web container.
        // The EJB specification describes restrictions on the use of JMS in an EJB container, 
        // as well as the interaction of JMS with transactions in an EJB container. 
        // Applications running in the web container should follow the same restrictions.

但是,不幸的是,我以一种奇怪的模式运行我的Glassfish客户端(不完全是在ACC中,但与它非常相似)。

那么,我该怎么办?

骑龙

哦,当然,我可以看看上面提到的臭名昭着的臭虫:CR6760301 ......嗯,事实上,似乎是不,我不能(旁边,注意哪个高质量是由oracle提供的常见问题解答......)。

所以只有剩下的解决方案是...,是的,疼痛,在会话创建之前插入一点静态

static {
    /*
     * Want to know why ? http://stackoverflow.com/q/19277018/15619 this is why
     */
    System.setProperty("imq.jmsra.fixCR6760301", Boolean.FALSE.toString());
}
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