如何启用Wildfly 9中JSP的即时编译？

Question

我用的是野生蝇9.0.0.CR2。如何启用JSP的即时编译？我在另一个线程中找到了这个配置。

    <subsystem xmlns="urn:jboss:domain:web:1.4" default-virtual-server="default-host" native="false">
        <configuration>
            <jsp-configuration development="true" check-interval="1" modification-test-interval="1" recompile-on-fail="true"/>
        </configuration>
    </subsystem>

但是遗憾的是，当我重新启动我的JBoss服务器…时，它不起作用了，导致了下面的异常

    14:23:05,224 ERROR [org.jboss.as.server] (Controller Boot Thread) WFLYSRV0055: Caught exception during boot: org.jboss.as.controller.persistence.ConfigurationPersistenceException: WFLYCTL0085: Failed to parse configuration
        at org.jboss.as.controller.persistence.XmlConfigurationPersister.load(XmlConfigurationPersister.java:131)
        at org.jboss.as.server.ServerService.boot(ServerService.java:350)
        at org.jboss.as.controller.AbstractControllerService$1.run(AbstractControllerService.java:271)
        at java.lang.Thread.run(Thread.java:745)
    Caused by: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[442,2]
Message: Unexpected element '{urn:jboss:domain:web:1.4}subsystem'
        at org.jboss.staxmapper.XMLMapperImpl.processNested(XMLMapperImpl.java:108)
        at org.jboss.staxmapper.XMLExtendedStreamReaderImpl.handleAny(XMLExtendedStreamReaderImpl.java:69)
        at org.jboss.as.server.parsing.StandaloneXml.parseServerProfile(StandaloneXml.java:1199)
        at org.jboss.as.server.parsing.StandaloneXml.readServerElement_1_4(StandaloneXml.java:457)
        at org.jboss.as.server.parsing.StandaloneXml.readElement(StandaloneXml.java:144)
        at org.jboss.as.server.parsing.StandaloneXml.readElement(StandaloneXml.java:106)
        at org.jboss.staxmapper.XMLMapperImpl.processNested(XMLMapperImpl.java:110)
        at org.jboss.staxmapper.XMLMapperImpl.parseDocument(XMLMapperImpl.java:69)
        at org.jboss.as.controller.persistence.XmlConfigurationPersister.load(XmlConfigurationPersister.java:123)
        ... 3 more

Answer 1

这是一个XML解析问题，从这个错误消息javax.xml.stream.XMLStreamException: ParseError中可以看出。此特定行Unexpected element{urn:jboss:domain:web:1.4}subsystem的解析失败。

您可以查看XML模式文档，找出这些类型的XML解析问题。架构位于WildFly的docs文件夹下。

顺便说一句，您应该使用WildFly-9.0.1.Final构建版本，因为这是最新发布的候选版本。

您很可能需要对下面的子系统进行更改。以下是我更新的一个例子：

 <subsystem xmlns="urn:jboss:domain:undertow:2.0">
            <buffer-cache name="default"/>
            <server name="default-server">
                <http-listener name="default" socket-binding="http" redirect-socket="https"/>
                <host name="default-host" alias="localhost">
                    <location name="/" handler="welcome-content"/>
                    <filter-ref name="server-header"/>
                    <filter-ref name="x-powered-by-header"/>
                </host>
            </server>
            <servlet-container name="default">
                <jsp-config development="true" check-interval="1" modification-test-interval="1" recompile-on-fail="true"/>
                <websockets/>
            </servlet-container>
            <handlers>
                <file name="welcome-content" path="${jboss.home.dir}/welcome-content"/>
            </handlers>
            <filters>
                <response-header name="server-header" header-name="Server" header-value="WildFly/9"/>
                <response-header name="x-powered-by-header" header-name="X-Powered-By" header-value="Undertow/1"/>
            </filters>
        </subsystem>

我强烈建议使用CLI进行这样的更改：

/subsystem=undertow/servlet-container=default/setting=jsp:write-attribute(name=development,value=true)
/subsystem=undertow/servlet-container=default/setting=jsp:write-attribute(name=recompile-on-fail,value=true)
/subsystem=undertow/servlet-container=default/setting=jsp:write-attribute(name=check-interval,value=1)
/subsystem=undertow/servlet-container=default/setting=jsp:write-attribute(name=modification-test-interval,value=1)

这样，您就可以避免这些XML解析错误，而不必找到确切的XML模式。

Answer 2

搜索子系统并将其添加到jsp配置中。

<subsystem xmlns="urn:jboss:domain:undertow:1.1"><br>. . . .<br>   <servlet-container name="default" default-buffer-cache="default" stack-trace-on-error="local-only">
   <jsp-config development="true" check-interval="1" modification-test-interval="1" recompile-on-fail="true"/>

Answer 3

确保您正在加载下拖曳扩展部分。否则，子系统配置无法加载。除此之外，您的语法是正确的。

<extensions>
    <!-- other extensions here -->
    <extension module="org.wildfly.extension.undertow"/>
</extensions>