如何使用 Spring 的 EhCache 本地 xsd

Question

We are facing one issue about EhCache and Spring, when we point XSD file in ehcache.xml to http://ehcache.org/ehcache.xsd , everything is ok, our application can startup correct. But our server can't access external website, so we changed XSD location to local as below, but the application can't startup with following exception (already copy ehcache.xsd to classes folder, same as ehcache.xml). I have googled many solution, but it still can't be fixed. I need your help about this. Thank you very much.

Spring: 3.1.0 EhCache: 2.4.2 Server: Tomcat 6.0 Java: 1.6

Config:

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="ehcache.xsd"
    updateCheck="false" monitoring="autodetect" dynamicConfig="true"> 

Exception:

2012-11-07 16:54:42,003 WARN [org.springframework.beans.factory.xml.XmlBeanDefinitionReader] - <Ignored XML validation warning>
org.xml.sax.SAXParseException: schema_reference.4: Failed to read schema document 'ehcache.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>.
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.warning(ErrorHandlerWrapper.java:96)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:380)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:318)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.findSchemaGrammar(XMLSchemaValidator.java:2440)
    ... more
2012-11-07 16:54:42,007 ERROR [org.springframework.web.context.ContextLoader] - <Context initialization failed>
org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 3 in XML document from ServletContext resource [/WEB-INF/classes/META-INF/ehcache.xml] is invalid; nested exception is org.xml.sax.SAXParseException: cvc-elt.1: Cannot find the declaration of element 'ehcache'.
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:396)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
    ... more
Caused by: org.xml.sax.SAXParseException: cvc-elt.1: Cannot find the declaration of element 'ehcache'.
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:131)

    ...  more

Answer 1

Download ehcache.xsd , put it to the same folder where is your config xml file. modify the xml head like below, notice the classpath prefix:

<ehcache
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="classpath:ehcache.xsd">

This will work in the development and production environment.

Answer 2

usually I set xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd" , But this can't work in a offline environment.

Answer 3

My Workaround is add this xsd file to absolute path, such as: c:/ehcache.xsd and point to this location in ehcache.xml. Hope this will help someone who facing the same issue.

Still looking forward to find out other solution.

Thanks.

Answer 4

In my case just downloading the file from http://ehcache.org/ehcache.xsd into src/main/resources solves the problem

cd src/main/resources
wget http://ehcache.org/ehcache.xsd