Issue with creating custom tag library using OSGI bundle

Oki, here's the part:

 

<plugin> <groupId>org.apache.felix</groupId> <artifactId>maven-bundle-plugin</artifactId> <extensions>true</extensions> <configuration> <instructions> <Export-Package> //Package exports </Export-Package> <Import-Package> *;resolution:=optional </Import-Package> <Embed-Dependency>*;scope=compile|runtime</Embed-Dependency> <Sling-Test-Regexp>.*Test</Sling-Test-Regexp> <Include-Resource>META-INF/myTld.tld=target/classes/META-INF/myTld.tld</Include-Resource> </instructions> </configuration> </plugin>

This is from one of the child pom files.
In the parent pom (parent for all the other bundles) there is also the maven-resources plugin which handles the copying of resources to the output directory.

This is the plugin code from there:
 

<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-resources-plugin</artifactId> <configuration> <encoding>UTF-8</encoding> </configuration> <version>2.6</version> </plugin>

Hope this will help you.
/Johan

Hi,

First off, I find it very confusing that you are posting to two separate topics on the same issue. If your issue is still persisting, I'd recommend starting a new thread and only use a single thread.

The issue you are describing is caused by embedding the JSP API. I wrote this yesterday in the other thread:

"In addition, you should not be embedding the JSP API. This will cause other issues.  In fact, it looks like 100% of the configuration you have of the maven-bundle-plugin is either unnecessary or causing issues."

Regards,

Justin

Sorry, There was some conflict between these two threads.

Yes, It is working as expected after removed <Embed-Dependency> tag. :)

Thanks a lot for your interest!

Hi, There was some problem with package name. Now Sling can read my tag handler class after i renamed the package name.

The error "Unable to load tag handler class" also has gone.

Now i am getting error as "org.apache.sling.api.scripting.ScriptEvaluationException: javax.servlet.ServletException: javax.servlet.jsp.JspException: com.testcb.TestCustomTag cannot be cast to javax.servlet.jsp.tagext.Tag"

I have the following dependency in pom.xml

<dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.1</version>
</dependency>

And Here is my tld

<?xml version="1.0" encoding="ISO-8859-1" ?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd" version="2.0">
    <description>My tag library123</description>
    <tlib-version>1.0</tlib-version>
    <short-name>TagLib-Test</short-name>
    <uri>http://cs.test.com/bundles/cq/1.0</uri>
    <jspversion>2.1</jspversion>
    <tag>
      <name>testcustomtag</name>
      <tagclass>com.testcb.TestCustomTag</tagclass>
      <bodycontent>empty</bodycontent>
      <info>This is a simple hello tag</info>
    <attribute>
      <name>name</name>
      <required>true</required>
      <rtexprvalue>true</rtexprvalue>
    </attribute>
    </tag>
</taglib>

Is there any problem with jsp version?

Thanks

Hi,

<plugin>
    <groupId>org.apache.felix</groupId>
    <artifactId>maven-bundle-plugin</artifactId>
    <extensions>true</extensions>
    <configuration>
        <instructions>
            <Bundle-Activator>com.cqblueprints.example.taglib.osgi.Activator</Bundle-Activator>
            <Export-Package>com.cb.*</Export-Package>
            <Import-Package>*;resolution:=optional</Import-Package>
            <Include-Resource>META-INF/tags.tld=src/main/resources/META-INF/tags.tld;{maven-resources}</Include-Resource>
            <Sling-Bundle-Resources>/META-INF/</Sling-Bundle-Resources>
        </instructions>
    </configuration>
</plugin>

I have tried with <resource> element and also tried as above as you have mentioned. But it still gives the same error as

org.apache.sling.api.scripting.ScriptEvaluationException: org.apache.sling.scripting.jsp.jasper.JasperException: /apps/cb/components/content/test/test.jsp(4,0) Unable to load tag handler class "com.cb.Hello" for tag "mytest3:hello"

Here is my maven folder strusture

bundle -> src -> main -> java -> com-> cb -> Hello.java
bundle -> src -> main -> resources -> tags.tld

and here is my jar file structure

cb-bundle-1.0-SNAPSHOT -> META-INF -> tags.tld
cb-bundle-1.0-SNAPSHOT -> OSGI-INF -> .....
cb-bundle-1.0-SNAPSHOT -> com.cb -> Hello.class

Is there anything i am missing here?

Thanks

Thanks. URI issue has solved as i have followed your points above.

Now i am getting error - Unable to load tag handler class "com.mine.tags.Hello" for tag "sample:hello" through i have included that package in export package like

<Export-Package>com.mine.tags.Hello</Export-Package>
<Import-Package>*;resolution:=optional</Import-Package>

I also tied it like  <Export-Package>com.mine.*</Export-Package> But getting the same error. Is there anything i missed it in export package section?

Thanks

I have included mine like this in the jsp:

<%@ taglib prefix="mytaglib" uri="http://taglib.my.test.com/taglibs/mytaglib/1.0"%>

and in my .tld file I have the following:


//code...
    <uri>http://taglib.my.test.com/taglibs/mytaglib/1.0</uri>
//code...

So they both needs to match for the jsp file to know which taglib it's looking for.

Do you have those as the same ?

/Johan

anderson.nt wrote...

Finally that tld file has placed correctly under META-INF folder by using resource tag as like below in pom file

            <resource>
            <targetPath>META-INF</targetPath>
            <directory>src/main/resources</directory>
            <includes>
            <include>myTags.tld</include>
            </includes>
            </resource>

Here is the another issue. When i include that tag library by using taglib directive like

<%@ taglib uri=" http://mine.com/bundles/cq/mytags" prefix="sample"%>

I am getting the below error like "The absolute uri: http://mine.com/bundles/cq/mytags cannot be resolved in either web.xml or the jar files deployed with this application"

But deployed jar file has the above uri. i don't know the exact issue. Do you have any idea why it is giving such error?

Thanks in advance.

 

I have a similar problem. Which POM and where-abouts in that POM did you put the <resource> section you show above ?

I am using the CQ Blueprints archetype. For example this is what gets auto-generated in the xxx-taglib module POM (I added some comments starting with FRG) :-

<plugin>
                <groupId>org.apache.felix</groupId>
                <artifactId>maven-bundle-plugin</artifactId>
                <extensions>true</extensions>
                <configuration>
                    <instructions>
                        <Bundle-Activator>com.cqblueprints.example.taglib.osgi.Activator</Bundle-Activator>
                        <!-- FRG
                        
                        The file : cqblueprints-example-taglib-1.0.0-SNAPSHOT.tld
                        
                        does NOT get generated when CLEANing this project in eClipse and will create an error
                        
                        doing :- mvn clean install
                        
                        DOES create the file successfully
                       
                         -->
                       <Include-Resource>META-INF/${project.artifactId}-${project.version}.tld=${project.build.outputDirectory}/META-INF/${project.artifactId}-${project.version}.tld,{maven-resources}</Include-Resource>
                       <Include-Resource>{maven-resources}</Include-Resource>
                        <Sling-Bundle-Resources>/META-INF/tags</Sling-Bundle-Resources>
                    </instructions>
                </configuration>
            </plugin>

Regards

Fraser.

Finally that tld file has placed correctly under META-INF folder by using resource tag as like below in pom file

            <resource>
            <targetPath>META-INF</targetPath>
            <directory>src/main/resources</directory>
            <includes>
            <include>myTags.tld</include>
            </includes>
            </resource>

Here is the another issue. When i include that tag library by using taglib directive like

<%@ taglib uri=" http://mine.com/bundles/cq/mytags" prefix="sample"%>

I am getting the below error like "The absolute uri: http://mine.com/bundles/cq/mytags cannot be resolved in either web.xml or the jar files deployed with this application"

But deployed jar file has the above uri. i don't know the exact issue. Do you have any idea why it is giving such error?

Thanks in advance.