[opencms-dev] How to include results of a webservice call into a JSP that generates an opencms 8.0.0 page?
Enrico Ballarin Dolfin
enrico at sed.ethz.ch
Fri Jul 27 09:46:48 CEST 2012
Hi Yves,
many thanks!
Now I can use my custom taglib and include the results of my webservice call
into the JSP that generates an opencms 8.0.0 page.
Best regards,
Enrico
On Tuesday 24 July 2012 06:29:05 Yves Glodt wrote:
> Hi Enrico,
>
> On 23 July 2012 15:39, Enrico Ballarin Dolfin <enrico at sed.ethz.ch> wrote:
> > Hi Yves,
> >
> > On Monday 23 July 2012 08:55:03 Yves Glodt wrote:
> > > Hi,
> > >
> > > here is some example code. You will also find plenty of tutorials on
> > > the web. The best is you create a "Dynamic Web Project" in Eclipse and
> > > play around there.
> >
> > many thanks for your suggestion. I'm coming forward and I've experimented
> > a bit with a separate "Dynamic Web Project" in Eclipse.
> >
> > Note that I have moved WebContent/META-INF/yourtags.tld to
> > WebContent/WEB- INF/yourtags.tld to be able to run it, as I have seen in
> > several tutorials.
>
> ok
>
> > I could run the example as standalone and I have now the Taglib example
> > running as servlet on tomcat, but I cannot access it from inside my
> > opencms application:
> >
> > ---------------------
> > <%@ page session="true" language="java" contentType="text/html;
> > charset=UTF-8"
> > pageEncoding="UTF-8"%>
> > <%@ taglib prefix="mytags" uri="http://localhost:8080/HelloWorldTag/WEB-
> > INF/yourtags.tld<http://localhost:8080/HelloWorldTag/WEB-%0AINF/yourtags.
> > tld>" %>
>
> Try to change the uri to "/WEB- INF/yourtags.tld". That should help I hope
>
> :-)
>
> Also, I forgot to mention that you need to build a jar from your eclipse
> project and deploy it to WEB-INF/lib of your OpenCms installation.
>
> Here is a build-file for ant which I use for this purpose:
>
>
> <?xml version="1.0" encoding="UTF-8"?>
>
> <project default="buildTaglib" basedir="." name="taglib">
>
> <!--
> http://ant.apache.org/manual/CoreTasks/jar.html
> http://ant.apache.org/manual/tutorial-tasks-filesets-properties.html
> http://snippets.dzone.com/posts/show/1600
> http://ant.apache.org/manual/dirtasks.html#directorybasedtasks
> http://onlamp.com/pub/a/php/2005/12/20/php_ant.html?page=1
> -->
>
>
> <target name="init">
> <property name="temp.dir" value="${java.io.tmpdir}/${user.name}/${
> ant.project.name}" />
> <mkdir dir="${temp.dir}" />
> <property name="lib.dir" value="WebContent/WEB-INF/lib" />
> <property name="src.dir" value="$[basedir}/src" />
> <property name="build.dir" value="${basedir}/ant-build" />
> <property name="tld.file" location="./WebContent/META-INF/yourtags.tld"
> />
> </target>
>
>
> <target name="compile">
> <path id="classpath">
> <fileset dir="${lib.dir}" includes="**/*.jar" />
> <fileset dir="${basedir}/build-libs" includes="**/*.jar" />
> </path>
> <javac srcdir="./src" classpathref="classpath" target="1.6"
> source="1.6" destdir="${temp.dir}"
> debug="on"
> debuglevel="lines,source"
> />
> </target>
>
>
> <target name="jar">
> <delete file="hello.jar" />
> <property name="version.num" value="1.00" />
> <buildnumber file="build.num" />
>
> <tstamp>
> <format property="buildTimeStamp" pattern="yyyyMMdd-HHmmss"
> timezone="Europe/Luxembourg" />
> </tstamp>
>
> <mkdir dir="${temp.dir}/META-INF" />
> <copy file="./WebContent/META-INF/yourtags.tld"
> todir="${temp.dir}/META-INF" />
>
> <manifest file="MANIFEST.MF">
> <attribute name="Built-By" value="${user.name}" />
> <attribute name="Implementation-Version"
> value="${version.num}-b${build.number}" />
> <attribute name="Built-Date" value="${buildTimeStamp}" />
> </manifest>
>
> <jar destfile="taglib-${buildTimeStamp}.jar" basedir="${temp.dir}"
> includes="**/*" manifest="MANIFEST.MF" compress="yes" />
> </target>
>
>
> <target name="cleanup">
> <delete dir="${temp.dir}" />
> </target>
>
>
> <target name="buildTaglib" depends="init,compile,jar,cleanup" />
>
>
> </project>
>
> > <mytags:HelloWorldTag name="John Doe" />
> > ---------------------
> >
> > Accessing in the browser
> > http://localhost:8080/opencms/opencms/test-tag.jsp
> > I'm getting this error:
> >
> > The absolute uri:
> > http://localhost:8080/HelloWorldTag/WEB-INF/yourtags.tld cannot be
> > resolved in either web.xml or the jar files deployed with this
> > application.
> >
> > Do you mean the Taglib has to be run as a separate servlet or do I have
> > to integrate it inside my opencms application?
> >
> > Best regards,
> > Enrico
> >
> > > *Save this as WebContent/META-INF/yourtags.tld
> > > *
> > > <taglib version="2.0" xmlns="http://java.sun.com/xml/j2ee" xmlns:xsi="
> > > http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="
> > > http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd">
> > >
> > > <tlib-version>2.0</tlib-version>
> > > <jsp-version>2.0</jsp-version>
> > > <short-name>Tag Library</short-name>
> > > <uri>http://your.taglib.site.com</uri>
> > > <display-name></display-name>
> > > <small-icon></small-icon>
> > > <large-icon></large-icon>
> > > <description></description>
> > >
> > > <tag>
> > >
> > > <name>HelloWorldTag</name>
> > > <tag-class>com.example.tags.HelloWorldTag</tag-class>
> > > <body-content>empty</body-content>
> > > <attribute>
> > >
> > > <name>name</name>
> > > <required>false</required>
> > > <rtexprvalue>true</rtexprvalue>
> > > <description>Your Description</description>
> > >
> > > </attribute>
> > >
> > > </tag>
> > >
> > > </taglib>
> > >
> > >
> > >
> > > *Create this class:
> > > *
> > > package com.example.tags;
> > >
> > > import java.io.IOException;
> > >
> > > import javax.servlet.jsp.tagext.TagSupport;
> > >
> > > public class HelloWorldTag extends TagSupport {
> > >
> > > private static final long serialVersionUID = 1L;
> > > private String name = "";
> > >
> > >
> > > public HelloWorldTag() {
> > >
> > > super();
> > >
> > > }
> > >
> > >
> > > public void setName(final String name) {
> > >
> > > this.name = name;
> > >
> > > }
> > >
> > >
> > > @Override
> > > public int doStartTag() {
> > >
> > > return EVAL_PAGE;
> > >
> > > }
> > >
> > >
> > > @Override
> > > public int doEndTag() throws javax.servlet.jsp.JspTagException {
> > >
> > > try {
> > >
> > > pageContext.getOut().write("<p>Hello " + name + "!</p>");
> > >
> > > } catch (final IOException e) {
> > >
> > > e.printStackTrace();
> > >
> > > }
> > > return EVAL_PAGE;
> > >
> > > }
> > >
> > > }
> > >
> > >
> > >
> > > *Call the tag from a JSP (which you can place in OpenCms as jsp):
> > > *
> > > <%@ page session="true" language="java" contentType="text/html;
> > > charset=UTF-8" pageEncoding="UTF-8"%>
> > > <%@ taglib prefix="mytags" uri="http://your.taglib.site.com" %>
> > >
> > > <mytags:HelloWorldTag name="John Doe" />
> > >
> > >
> > >
> > > Best regards,
> > > Yves
> >
> > _______________________________________________
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