使用Maven Jetty插件时如何过滤资源? [英] How to filter resources when using maven jetty plugin?

问题描述

我有一个需要解析属性占位符的XML文件(urlrewrite.xml).我启用了Maven过滤来实现此目的.对于已组装的WAR文件，此方法工作正常.

I have an XML file (urlrewrite.xml) that needs a property placeholder resolved. I enable Maven filtering to achieve this. This works fine for the assembled WAR file.

<build>
    <resources>
        <resource>
            <directory>src/main/resources</directory>
            <filtering>true</filtering>
        </resource>

问题是，当尝试使用maven-jetty-plugin(Maven Jetty插件)作为maven jetty:run在开发模式下运行应用程序时.

The problem is when trying to run the application in development mode using the maven-jetty-plugin (Maven Jetty Plugin), as maven jetty:run .

有问题的文件urlrewrite.xml位于src/main/resources目录中，因此应该(并且确实)以/WEB-INF/classes(或maven jetty:run的target/classes)结尾.

The file in question, urlrewrite.xml, is located in the src/main/resources directory, and therefore should (and does) ends up in /WEB-INF/classes (or target/classes for maven jetty:run).

URLRewriteFilter配置指定配置文件的位置，如下所示:

The URLRewriteFilter config specifies the location of the config file as follows:

<filter>
    <filter-name>UrlRewriteFilter</filter-name>
    <filter-class>org.tuckey.web.filters.urlrewrite.UrlRewriteFilter</filter-class>
    <init-param>
        <param-name>confPath</param-name>
        <param-value>/WEB-INF/classes/urlrewrite.xml</param-value>
    </init-param>
</filter>

这将在部署时起作用.但是，使用Jetty Maven插件，URLRewrite将死于NullPointerException，因为它使用context.getResourceAsString("/WEB-INF/classes/urlrewrite.xml")来加载配置文件. Jetty为此返回null，因为从工作空间运行应用程序时，它将/WEB-INF/classes/...解析为src/main/webapp/WEB-INF/....该文件不存在，因为尚未组装WAR.相反，它应该从target/classes/urlrewrite.xml中提取资源.

This will work at deployment time. However, Using the jetty maven plugin, URLRewrite will die with a NullPointerException because it uses context.getResourceAsString("/WEB-INF/classes/urlrewrite.xml") in order to load the config file. Jetty returns null for this because when running the application from workspace it resolves /WEB-INF/classes/... to src/main/webapp/WEB-INF/... . The file does not exist there because the WAR has not yet been assembled. It should instead pull the resource from target/classes/urlrewrite.xml.

如果这对您来说很晦涩，那么您可能将无法回答这个问题，因为我怀疑您需要成为Jetty专家才能找到解决方法(提示:这是一个挑战！).

If that is obscure to you, then you probably won't be able to answer this question because I suspect you will need to be a Jetty guru to figure out a workaround (hint: that's a challenge!).

有人知道解决这个问题的方法吗?我还尝试了以下变通办法以了解是否有效:

Does anyone know a way around this? I have also tried the following workarounds to know avail:

1. 将urlrewrite.xml放在新目录src/main/webResources下，并将其添加到Maven War插件< webReources>中.并启用过滤.打包WAR时，会将其内容复制到适当的位置，但不会使其可用于码头:运行
2. 我什至不记得的其他一些黑客……(如果我会更新)

总而言之，maven-jetty-plugin需要文件位于src/main/resources/webapp/插入路径和文件名下，以便可用于maven jetty:run命令..

In summary, maven-jetty-plugin needs the file to be under src/main/resources/webapp/insert path and filename in order to be available for the maven jetty:run command ...

感谢您的帮助...

此致， 劳埃德部队

推荐答案

回答了我自己的问题.

1. 将maven-jetty-plugin升级到至少6.1.12

1. Upgrade maven-jetty-plugin to at least 6.1.12

请参阅此Wiki页面上的配置多个Web应用程序源目录"(自jetty-6.1.12.rc2和jetty-7.0.0pre3起可用)

See this wiki page on 'Configuring Multiple WebApp Source Directory' (available since jetty-6.1.12.rc2 and jetty-7.0.0pre3)

向pom.xml添加一些魔术:

Add some magic to pom.xml:

首先，为过滤后的网络资源添加一个新目录(src/main/webResources)，并添加一个< resource>元素:

First, add a new directory (src/main/webResources) for your filtered web resources and add a <resource> element:

        <resource>
            <directory>src/main/webResources</directory>
            <filtering>true</filtering>
            <targetPath>../jettyFilteredResources</targetPath>
        </resource>

这会将文件复制到target/jettyFilteredResources(我们将在以后引用).此目录不会复制到打包的WAR文件中，仅用于码头！

That will copy the files to target/jettyFilteredResources (we will reference this later). This directory will NOT get copied to your packaged WAR file, it is for jetty only!

在您的maven-war-plugin< configuration>中添加以下元素元素:

Add the following element to your maven-war-plugin <configuration> element:

                <webResources>
                    <resource>
                        <directory>src/main/webResources</directory>
                        <filtering>true</filtering>
                    </resource>
                </webResources>

这将确保为您的真实WAR文件打包所有内容.

That will ensure everything is packaged up for your real WAR file.

最后，通过将以下代码段添加到您的< baseResource>中，告诉Jetty使用您专门为其复制的资源.元素:

Finally, tell jetty to use the resources your copied especially for it, by added the following snippet to your <baseResource> element:

<baseResource implementation="org.mortbay.resource.ResourceCollection">                        
    <resourcesAsCSV>src/main/webapp,target/jettyFilteredResources</resourcesAsCSV>
</baseResource>

现在一切都会正常！ (嗯，从技术上讲，我还没有测试过生产中的战争，但是……等等……它也应该工作).

Now everything will worketh! (Well, technically I haven't tested the production WAR yet, but ... blah ... it should work too).

如果有人有更好的答案，只要在合理的时间内(例如1天)提供了答案，我就会接受.

If anyone has a better answer, I will accept it provided the answer is provided in a reasonable amount of time (say 1 day).

这篇关于使用Maven Jetty插件时如何过滤资源?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！