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https://issues.apache.org/jira/browse/OFBIZ-9483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Shi Jinghai updated OFBIZ-9483:
-------------------------------
Attachment: juel-impl-no-osgi-2.2.7.jar
The juel-impl-no-osgi-2.2.7.jar mentioned in the description.
> Enable EL in OFBiz
> ------------------
>
> Key: OFBIZ-9483
> URL: https://issues.apache.org/jira/browse/OFBIZ-9483
> Project: OFBiz
> Issue Type: Improvement
> Components: ALL COMPONENTS
> Affects Versions: 16.11.02
> Reporter: Shi Jinghai
> Assignee: Shi Jinghai
> Priority: Trivial
> Attachments: juel-impl-no-osgi-2.2.7.jar
>
>
> While deploying CAS and Drools-Workbench in OFBiz 16.11.02, the pages with EL
> report error messages:
>
> {code:java}
> java.lang.NullPointerException
> javax.el.CompositeELResolver.add(CompositeELResolver.java:117)
> org.apache.jasper.el.JasperELResolver.add(JasperELResolver.java:70)
> org.apache.jasper.el.JasperELResolver.<init>(JasperELResolver.java:58)
>
> org.apache.jasper.runtime.JspApplicationContextImpl.createELResolver(JspApplicationContextImpl.java:120)
>
> org.apache.jasper.runtime.JspApplicationContextImpl.createELContext(JspApplicationContextImpl.java:89)
>
> org.apache.jasper.runtime.PageContextImpl.getELContext(PageContextImpl.java:949)
>
> org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:934)
>
> org.apache.jsp.WEB_002dINF.view.jsp.default_.ui.casGenericSuccessView_jsp._jspService(casGenericSuccessView_jsp.java:152)
> {code}
> According to the doc of javax.el.ExpressionFactorym
> (http://docs.oracle.com/javaee/6/api/javax/el/ExpressionFactory.html):
> {code:java}
> Creates a new instance of a ExpressionFactory?. This method uses the
> following ordered lookup procedure to determine the ExpressionFactory?
> implementation class to load:
> •Use the Services API (as detailed in the JAR specification). If a resource
> with the name of META-INF/services/javax.el.ExpressionFactory? exists, then
> its first line, if present, is used as the UTF-8 encoded name of the
> implementation class.
> •Use the properties file "lib/el.properties" in the JRE directory. If this
> file exists and it is readable by the java.util.Properties.load(InputStream?)
> method, and it contains an entry whose key is "javax.el.ExpressionFactory?",
> then the value of that entry is used as the name of the implementation class.
> •Use the javax.el.ExpressionFactory? system property. If a system property
> with this name is defined, then its value is used as the name of the
> implementation class.
> •Use a platform default implementation.
> {code}
> I added an el.properties in ${jre_home}/lib/, the el.properties has one line:
> {code:java}
> javax.el.ExpressionFactory=org.apache.el.ExpressionFactoryImpl
> {code}
> Restarting OFBiz, the error messages are still there, so there is at least a
> META-INF/services/javax.el.ExpressionFactory in runtime jars. It comes to
> 'de.odysseus.juel:juel-spi:2.2.7', unzip it, it only contains a
> javax.el.ExpressionFactory file with de.odysseus.el.ExpressionFactoryImpl.
> Remove runtime 'de.odysseus.juel:juel-spi:2.2.7' and restart OFBiz, the error
> messages are still there. Unzip 'de.odysseus.juel:juel-impl:2.2.7', an
> OSGI-INF/services.xml found:
> {code:java}
> <?xml version="1.0" encoding="UTF-8"?>
> <root xmlns:scr="http://www.osgi.org/xmlns/scr/v1.1.0";>
> <scr:component name="de.odysseus.el.ExpressionFactoryImpl">
> <implementation class="de.odysseus.el.ExpressionFactoryImpl"/>
> <service>
> <provide interface="javax.el.ExpressionFactory"/>
> </service>
> </scr:component>
> </root>
> {code}
> It's easy to get it defines javax.el.ExpressionFactory implemented by
> de.odysseus.el.ExpressionFactoryImpl. Unzip it and create a new jar with
> command:
> {code:java}
> jar cf juel-impl-no-osgi-2.2.7.jar de/ META-INF/
> {code}
> Put the juel-impl-no-osgi-2.2.7.jar under ${ofbiz.home}/lib/, change the
> build.gradle:
> {code:java}
> // compile 'de.odysseus.juel:juel-impl:2.2.7'
> compile files('./lib/juel-impl-no-osgi-2.2.7.jar')
> {code}
> Restart OFBiz, both OFBiz pages and EL pages are ok now.
> Stop OFBiz, remove ${jre_home}/lib/el.properties, start OFBiz, EL pages fail.
> Obviously, this fail is caused by no javax.el.ExpressionFactory defined. Add
> a META-INF/javax.el.ExpressionFactory with one line content of
> org.apache.el.ExpressionFactoryImpl in juel-impl-no-osgi-2.2.7.jar.
> Restart OFBiz, all OFBiz and EL pages are right.
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