blocks|key|326631|text|CDI定义了自己的生命周期，该生命周期在应用程序启动/停止时执行。(您不应该已经知道了吗：This是一个学习基本机制的好地方。)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|326632|据我所知，问题在于Hibernate初始化过程与CDI启动没有直接联系。这意味着我不确定依赖Hibernate和CDI“事件”之间的关系是否安全。当然没有什么比CDI-Event+HibernateInitialized更好的了。|style|CODE|326633|话虽如此，我还是要试一试:)你应该实现一个简单的扩展，这个扩展挂接到BeforeBeanDiscovery上，越早越好。|326634|This+online+presentation概述了不同的CDI事件及其顺序。很不幸，是用德语写的。|326635|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.jboss.org/weld/reference/latest/en-US/html/extend.html#d0e4876|1|http://prezi.com/hsbhnxd4t3by/cdi-extensions/^0|19|4|0|0|2I|K|0|Y|J|0|0|O|1|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@$A|W|B|X|1|Y]]|C|$]]|$1|D|3|E|5|6|7|Z|8|@$A|10|B|11|F|G]]|9|@]|C|$]]|$1|H|3|I|5|6|7|12|8|@$A|13|B|14|F|G]]|9|@]|C|$]]|$1|J|3|K|5|6|7|15|8|@]|9|@$A|16|B|17|1|18]]|C|$]]|$1|L|3|-4|5|6|7|19|8|@]|9|@]|C|$]]]|M|$N|$5|O|P|Q|C|$R|S]]|T|$5|O|P|Q|C|$R|U]]]]

CDI defines its own lifecycle which is executed when an applications starts / stops. (Shouldn't you know about it already: <a href="http://docs.jboss.org/weld/reference/latest/en-US/html/extend.html#d0e4876" rel="nofollow">This</a> is a good place to learn about the basic mechanism.)

The problem - to my best knowledge - is that the Hibernate initialization process is not directly linked to the CDI startup. This means that I'm not sure if its safe to rely on a relation between Hibernate &amp; CDI "events". There is certainly nothing like a CDI-Event <code>HibernateInitialized</code>. 

Having said this, I'd give it a try :) You should implement a simple extension that hooks up at <code>BeforeBeanDiscovery</code>, which is as early as it gets.

<a href="http://prezi.com/hsbhnxd4t3by/cdi-extensions/" rel="nofollow">This online presentation</a> gives an overview about the different CDI events and their order. It's in German, unfortunately.

blocks|key|326688|text|好了，我终于知道该怎么做了:我必须使用Hibernate集成API。这是我不得不写的全部代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|326689|public+class+FlywayIntegrator+implements+Integrator+{

++@Override
++public+void+integrate(final+Configuration+configuration,+final+SessionFactoryImplementor+sessionFactoryImplementor,+final+SessionFactoryServiceRegistry+sessionFactoryServiceRegistry)+{
++++final+Flyway+flyway+=+new+Flyway();

++++flyway.setDataSource(....);
++++flyway.migrate();
++}

++@Override
++public+void+integrate(final+MetadataImplementor+metadataImplementor,+final+SessionFactoryImplementor+sessionFactoryImplementor,+final+SessionFactoryServiceRegistry+sessionFactoryServiceRegistry)+{
++++//no-op
++}

++@Override
++public+void+disintegrate(final+SessionFactoryImplementor+sessionFactoryImplementor,+final+SessionFactoryServiceRegistry+sessionFactoryServiceRegistry)+{
++++//no-op
++}
}|code-block|syntax|javascript|326690|如果有人对更多细节感兴趣，我创建了一个github项目来演示这一点：https://github.com/dobermai/Hibernate-Flyway-Integration|offset|length|326691|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/dobermai/Hibernate-Flyway-Integration^0|0|0|Y|1K|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Ok I finally found out how to do this: I had to use the Hibernate Integration API. This is the whole code I had to write:

<pre class="lang-java prettyprint-override"><code>public class FlywayIntegrator implements Integrator {

 @Override
 public void integrate(final Configuration configuration, final SessionFactoryImplementor sessionFactoryImplementor, final SessionFactoryServiceRegistry sessionFactoryServiceRegistry) {
 final Flyway flyway = new Flyway();

 flyway.setDataSource(....);
 flyway.migrate();
 }

 @Override
 public void integrate(final MetadataImplementor metadataImplementor, final SessionFactoryImplementor sessionFactoryImplementor, final SessionFactoryServiceRegistry sessionFactoryServiceRegistry) {
 //no-op
 }

 @Override
 public void disintegrate(final SessionFactoryImplementor sessionFactoryImplementor, final SessionFactoryServiceRegistry sessionFactoryServiceRegistry) {
 //no-op
 }
}
</code></pre>

If anyone is interested in more details, I created a github project which demonstrates that: <a href="https://github.com/dobermai/Hibernate-Flyway-Integration">https://github.com/dobermai/Hibernate-Flyway-Integration</a>

I tried to run flyway in my application before hibernate is hooking in on my JBoss AS 7.1. I tried with an <code>@javax.ejb.Startup</code> annotation, but this gets executed AFTER Hibernate is initialized and the database scheme is checked.

So as far as I understand we can use a CDI Extension which hooks in before Hibernate is initialized. Is there some support for that out of the box for flyway? And if not, has anyone tried to do this before?

CDI Extension for Flyway

数据库

在hibernate挂上我的JBoss AS7.1之前，我试着在我的应用程序中运行flyway。我尝试使用@javax.ejb.Startup注释，但在初始化Hibernate并检查数据库方案后执行。因此，据我所知，我们可以使用在Hibernate初始化之前挂接的CDI扩展。对于flyway，是否有一些开箱即用的支持？...

问Flyway的CDI扩展
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