[opencms-dev] Calling a java class from OC beta 2

CALI-GARSIA Bruno bruno.cali-garsia-renexter at renault.com
Mon Nov 25 19:00:56 CET 2002


Hi Kevin,

You should try to put the full package name when you define a class :

------8<--------
   <ELEMENTDEF name="testelement">
 >>>>>>>     <CLASS>com.text.opencms.TestElement</CLASS>  <<<<<<
      <TEMPLATE>../elements/testelement</TEMPLATE>
    </ELEMENTDEF>


regards
Bruno

-----Message d'origine-----
De : owner-opencms-dev at www.opencms.org
[mailto:owner-opencms-dev at www.opencms.org]De la part de Kevin McKenzie
Envoyé : lundi 25 novembre 2002 17:04
À : opencms-dev at www.opencms.org
Objet : Re: [opencms-dev] Calling a java class from OC beta 2


25/11/2002 14:20:14, "Assaf Nehoray" <anehoray at hotmail.com> wrote:
>  Hi,
>
>  I am trying to integrate between OpenCMS and another application which is
>  java based. I am checking out how I can do that using JSPs. I wrote a jsp
>   page in the root. In it I am trying to use a class(<jsp:useBean>) and
then
>  call it. I have placed the .class in the classes directory as well as in
the
>  root directory alas it cannot find it and I get a jsp error.
>
>  I am using the new beta 2 version 5.0 where the directory structure is a
>  little different. Since the documentation is not yet up to date I am
>  clueless. Anyone can give me some simple guidance on how to call a java
>  class/ application.

Hi Assaf,

I don't have an answer for you but thought I would share my experience, as
it may help
others to provide an answer.

I have been looking at:   2.3.2. Setting data blocks dynamically.

My templates look like this:

testmaster2
  <?xml version="1.0"?>
  <XMLTEMPLATE>
    <ELEMENTDEF name="contenttemplate">
      <CLASS>com.opencms.template.CmsXmlTemplate</CLASS>
      <TEMPLATE>testcontent</TEMPLATE>
    </ELEMENTDEF>
    <ELEMENTDEF name="frametemplate">
      <CLASS>com.opencms.template.CmsXmlTemplate</CLASS>
      <TEMPLATE>testframe</TEMPLATE>
    </ELEMENTDEF>
    <TEMPLATE> <ELEMENT name="frametemplate"/> </TEMPLATE>
  </XMLTEMPLATE>

testframe
  <XMLTEMPLATE>
    <TEMPLATE><![CDATA[
      <HTML>
      <HEAD>
        <TITLE>]]><method name="getTitle"/><![CDATA[</TITLE>
      </HEAD>
      <BODY>
        <TABLE border width="100%" height="100%">
        <TR height="30%">
          <TH colspan=2 width="100%" align="center">
            The Head section
          </TH>
        </TR>
        <TR height="70%">
          <TD width="20%" align="center" valign="top">
            Navigation
          </TD>
          <TD width="80%" align="center">
            ]]><ELEMENT name="contenttemplate"/><![CDATA[
          </TD>
        </TR>
        </TABLE>
      </BODY>
      </HTML>]]>
    </TEMPLATE>
  </XMLTEMPLATE>

testcontent
  <?xml version="1.0" encoding="ISO-8859-1"?>
  <XMLTEMPLATE>
    <TEMPLATE>
      <ELEMENT name="testelement"/>
      <ELEMENT name="body"/>
    </TEMPLATE>
    <ELEMENTDEF name="testelement">
      <CLASS>TestElement</CLASS>
      <TEMPLATE>../elements/testelement</TEMPLATE>
    </ELEMENTDEF>
  </XMLTEMPLATE>

My Java class is as follows:

  package com.text.opencms;
  import com.opencms.template.*;
  import com.opencms.file.*;
  import com.opencms.core.*;
  import java.util.*;
  public class TestElement extends CmsXmlTemplate {

    public byte[] getContent( CmsObject cms, String templateFile, String
elementName,
        Hashtable parameters,String templateSelector )
        throws CmsException {
        CmsXmlTemplateFile templateDocument = getOwnTemplateFile(cms,
templateFile,
            elementName, parameters, templateSelector);
        templateDocument.setData("greeting","from KevKiwi!!!");
        return startProcessing(cms, templateDocument, elementName,
            parameters, templateFile);
    }
}

I compiled my Java class and copied it to:
   \WEB-INF\classes\com\test\opencms

I created page with the followinf properties:
  Title: testpage2
  State: new
  Owner: (Admin)
  Group: Administrators

When I try to display this page, I get the following error:

[CmsException]: 26 Wrong XML template class. Detailed Error: Could not
initialize (sub-)
element for class "TestElement". [CmsException]: 29 OpenCms class loader
error.
Detailed Error: Could not load template class TestElement. TestElement.
Caught
Exception: >java.lang.ClassNotFoundException: TestElement<.
 at
com.opencms.template.cache.CmsElementLocator.get(CmsElementLocator.java:166)
 at com.opencms.template.cache.A_CmsElement.checkProxySettings
(A_CmsElement.java:347)
 at com.opencms.template.cache.A_CmsElement.checkProxySettings
(A_CmsElement.java:350)
 at com.opencms.template.cache.CmsUri.callCanonicalRoot(CmsUri.java:129)
 at com.opencms.template.cache.CmsElementCache.callCanonicalRoot
(CmsElementCache.java:148)
 at
com.opencms.launcher.CmsXmlLauncher.generateOutput(CmsXmlLauncher.java:263)
 at com.opencms.launcher.CmsXmlLauncher.launch(CmsXmlLauncher.java:319)
 at com.opencms.launcher.A_CmsLauncher.initlaunch(A_CmsLauncher.java:268)
 at com.opencms.core.OpenCms.showResource(OpenCms.java:781)
 at com.opencms.core.OpenCmsHttpServlet.doGet(OpenCmsHttpServlet.java:260)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:247)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:193)
 at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:243)
 at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
 at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
 at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
 at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:190)
 at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
 at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:2
46)
 at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
 at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
 at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
 at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2343)
 at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
 at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
 at org.apache.catalina.valves.ErrorDispatcherValve.invoke
(ErrorDispatcherValve.java:170)
 at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
 at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170
)
 at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
 at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
 at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
 at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
 at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
 at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:174)
 at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
 at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
 at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
 at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:
1012)
 at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1107
)
 at java.lang.Thread.run(Thread.java:536)







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