将 PrimeFaces 添加为 EAR 的库时遇到问题 [英] Having trouble adding PrimeFaces as EAR's library

问题描述

我想在具有以下结构的 Java EE 6 (Jboss AS 7.1.1Final) 应用程序中使用 PrimeFaces:

I'd like to use PrimeFaces in my Java EE 6 (Jboss AS 7.1.1Final) application with this structure:

EAR
|- lib/
|    |- primefaces-4.0.jar
|
|- ejb-module.jar
|- webbapp1.war
|- webapp2.war

但是，在部署到 JBoss AS 7 时，我遇到了几个异常，例如:

However, when deploying to JBoss AS 7, I'm getting several exceptions such as:

java.lang.LinkageError: Failed to link org/primefaces/context/PrimeFacesContextFactory 

(请在 PasteBin 上查看完整的堆栈跟踪 此处)

(Please see the full stack trace here on PasteBin)

对于 EAR 的 pom.xml，我将这个 Maven 依赖用于 PrimeFaces:

For EAR's pom.xml, I'm using this Maven dependency for PrimeFaces:

    <dependency>
    <groupId>org.primefaces</groupId>
    <artifactId>primefaces</artifactId>
    <version>4.0</version>
    <type>jar</type>
</dependency>

但是，当我将依赖项放入一个 WAR 的 pom.xml 时，它可以工作，但我想在多个 WAR 之间共享 primefaces 库.

However, when I put the dependency into pom.xml of one WAR, it works, but I want to share the primefaces library between multiple WARs.

我在谷歌上搜索了很多，但没有找到任何解决方案.感谢您的任何建议.

I've googled a lot but have not found any solution. Thank you for any advice.

推荐答案

你不能.Webapp库不属于EAR/lib，而是WAR/WEB-INF/lib.EAR/lib 从来没有打算作为 EAR 的所有 WAR 项目的共享库".仅适用于 EAR 的所有 EJB 项目(业务服务).

You cannot. Webapp libraries do not belong in EAR/lib, but in WAR/WEB-INF/lib. The EAR/lib is never intented as a "shared library" for all WAR projects of the EAR. It's that only for all EJB projects (the business services) of the EAR.

您面临的 PrimeFaces 特定类上的 LinkageError 是因为 EAR/lib.这会导致 EAR/lib 中所有在 WAR/WEB-INF/lib 中具有(虚拟)依赖项的库都失败，并出现类加载错误，例如 LinkageError.

The LinkageError on a PrimeFaces-specific class which you're facing is caused because the (default) webapp-specific libraries like JSF API/impl are not available to the classloader as used by EAR/lib. This causes all libraries in the EAR/lib which have a (virtual) dependency in WAR/WEB-INF/lib to fail with class loading errors like LinkageError.

如果您真的真的需要所有 WAR 项目的共享库"，那么最好的办法是将库放在 Java EE 容器本身中(就像默认情况下已经为 JSF API/impl 库所做的那样).在 JBoss 的情况下，这称为模块".但是，我不建议这样做，因为这会使 webapp 无法跨容器移植，而无需由服务器管理员专门配置容器.只需为每个 webapp 提供自己的一组 webapp 库.

If you really really need a "shared library" for all WAR projects, then your best bet is putting the library in Java EE container itself (like as by default already done for JSF API/impl libraries). In case of JBoss, that's called a "module". I however wouldn't recommend that as that makes the webapp unportable across containers without specifically configuring the container by the serveradmin. Just give each webapp its own set of webapp libraries.

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