Why OSGI service cannot be resolved to a type?

[Former Community Member]

According to this article http://helpx.adobe.com/experience-manager/using/persisting-cq-data-java-content1.html# , finally run happened below error. I look into this problem for one day but no way to fix it.

Anyone could help see this problem, thanks in advance.

persist.json.jsp

<%@include file="/libs/foundation/global.jsp"%> <%@ page import="org.apache.sling.commons.json.io.*,com.adobe.cq.*" %><% String first = request.getParameter("first"); String last = request.getParameter("last"); String phone = request.getParameter("phone"); String desc = request.getParameter("desc");com.adobe.cq.CustomerService cs = sling.getService(com.adobe.cq.CustomerService.class);int myPK = cs.injestCustData(first, last, phone, desc) ; //Send the data back to the client JSONWriter writer = new JSONWriter(response.getWriter()); writer.object(); writer.key("pk"); writer.value(myPK); writer.endObject(); %>

Error message:

13.10.2014 11:16:45.677 *ERROR* [127.0.0.1 [1413170205545] GET /content/testjcr/_jcr_content.persist.json HTTP/1.1] org.apache.sling.engine.impl.SlingRequestProcessorImpl service: Uncaught SlingException
org.apache.sling.scripting.jsp.jasper.JasperException: Unable to compile class for JSP:

An error occurred at line: 8 in the jsp file: /apps/jcrpersist/components/page/templateJCR/persist.json.jspcom.adobe.cq.CustomerService cannot be resolved to a type5: String phone = request.getParameter("phone"); 6: String desc = request.getParameter("desc"); 7: 8: com.adobe.cq.CustomerService cs = sling.getService(com.adobe.cq.CustomerService.class);9: 10: int myPK = cs.injestCustData(first, last, phone, desc) ; 11: at org.apache.sling.scripting.jsp.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92) at org.apache.sling.scripting.jsp.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330) at org.apache.sling.scripting.jsp.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:421) at org.apache.sling.scripting.jsp.jasper.compiler.Compiler.compile(Compiler.java:312) at org.apache.sling.scripting.jsp.jasper.compiler.Compiler.compile(Compiler.java:290) at org.apache.sling.scripting.jsp.jasper.compiler.Compiler.compile(Compiler.java:277) at org.apache.sling.scripting.jsp.jasper.JspCompilationContext.compile(JspCompilationContext.java:501) at org.apache.sling.scripting.jsp.jasper.servlet.JspServletWrapper.prepareServlet(JspServletWrapper.java:427) at org.apache.sling.scripting.jsp.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:486) at org.apache.sling.scripting.jsp.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:449) at org.apache.sling.scripting.jsp.JspScriptEngineFactory.callJsp(JspScriptEngineFactory.java:265) at org.apache.sling.scripting.jsp.JspScriptEngineFactory.access$100(JspScriptEngineFactory.java:87) at org.apache.sling.scripting.jsp.JspScriptEngineFactory$JspScriptEngine.eval(JspScriptEngineFactory.java:465) at org.apache.sling.scripting.core.impl.DefaultSlingScript.call(DefaultSlingScript.java:361) at org.apache.sling.scripting.core.impl.DefaultSlingScript.eval(DefaultSlingScript.java:171) at org.apache.sling.scripting.core.impl.DefaultSlingScript.service(DefaultSlingScript.java:463)

OSGI bundle:

[Ratna_Kumar · Accepted solution]

It worked for me in One go - I think it cannot find the Bundle from JSP. Please make sure to include the required dependencies and build the bundle as mentioned in the article.

[Former Community Member]

Hi,

Yes, i did it literally according to this article but, always encounter that error.

[smacdonald2008]

Package up your app - including the bundle and page - bundle up everything and email me the ZIP file at scottm@adobe.com. Follow this article to bundle that app - including the OSGi. I want to see your app:

http://helpx.adobe.com/experience-manager/using/packaging-cq-applications-contain-osgi.html

[Former Community Member]

Get it, i will do that according to that aritcle. Thank you so much.

[maximilian_queh]

Hi smacdonald2008,

would it be possible to post the solution here - I get exactly the same exception and actually I don't know what I am doing wrong.

Bundle is "Active", Service is listed but JSP can't compiled to a Servlet.

It would be great if you could post the solution.

Thanks a lot!!!

Max

[maximilian_queh]

I have solved the issue concerning "Uncaught SlingException org.apache.sling.scripting.jsp.jasper.JasperException: Unable to compile class for JSP: "

The problem is, that I did other tutorials before and the Bundles have the same package structure like in this tutorial: http://helpx.adobe.com/experience-manager/using/persisting-cq-data-java-content.html (com.adobe.cq)

And the problem is, that OSGI is package centric and cannot resolve the service in another bundle with the same package structure.

The solution is either to stop other bundles with the same package structure or to change the package structure of the current bundle.

Then everything works fine

Max

[smacdonald2008]

What version of CQ are you using? 

This article - along with all community helpx articles have been tested many times - as well as tested by some of the AEM regular community members. I just did the persist one and it works. Here is the web page:

[img]Persist.png[/img]

Here is the Data persisted in the JCR - same data:

[img]Persist2.png[/img]

The question here is why can you not get this working? 

This error messge means that JSP cannot find the OSGi. Can you see if this is under the Service view. You have to be able to see this under the Service tab of the Felix OSGi console:

[img]Service.png[/img]

[Feike_Visser1]

Can you check your export packages in your bundle?

I don't think it has anything to do with the OSGi service, it that wouldn't exist you would get a NullPointer somewhere.

To me when compiling the JSP it can't find the Java-class.

[Former Community Member]

Hi

Again,I notice this article http://helpx.adobe.com/experience-manager/using/persisting-cq-data-java-content1.html# there is some mistake but i am not sure.

e.g., below the "strong" path i change it for "/apps/jcrpersist/components" because i notice never create fold sqlpersist and i guess it is a type mistake, right?

<ref-text>

The css.txt file contains the CSS file name: site.css. Likewise, the js.txt file contains the JS file name: jquery-1.6.3.min.js.

Add the files to the ClientLibs folder

1. Right-click /apps/sqlpersist/components then select New, Node.

<ref-text>

Secondly, this example it's code dependency much jar in maven repository. I think if is it relevant to the maven mechristem?

[Former Community Member]

I using the Adobe Experience Manager, Version 6.0.0.20140509 and run it model as "cq-author-4502.jar". i chekc the tab "OSGI" under it the menu "service", it is well and nothing incorrectly. pleas see below screenshot or attachment:

The most weird point is never happen the exception also in JSP page could call the OSGI service according to this article example http://helpx.adobe.com/experience-manager/using/first-osgi.html

It's really make me confused.

[Former Community Member]

Thanks for your answer. And i deploy the bundle to OSGI container also start it with no any failure message. But i find no any dependency jar files were included into the bundle Jar, it only declare it's dependency in the pom file.

This error logged found in file {crx-quickstart}/logs/error.log and happened when first page form data was commit to persist.json.jsp to persist then fail to that.

Its make me confuse.

[Jörg_Hoh]

Hi,

Your problem about the JSP compilation error looks like, that you miss the class

com.adobe.cq.CustomerService

I also don't know this class, at least it's not part of any GA release. In the webpage http://helpx.adobe.com/experience-manager/using/first-osgi.html you referenced above I also don't find any reference to this service. You should provide a class/interface there which is exported via any OSGI service in your AEM installation.

Kind regards,
Jörg

[Former Community Member]

Hi,

I notice this article http://helpx.adobe.com/experience-manager/using/persisting-cq-data-java-content1.html# there is some mistake but i am not sure.

e.g., below the "strong" path i change it for "/apps/jcrpersist/components" because i notice never create fold sqlpersist and i guess it is a type mistake, right?

<ref>

The css.txt file contains the CSS file name: site.css. Likewise, the js.txt file contains the JS file name: jquery-1.6.3.min.js.

Add the files to the ClientLibs folder

1. Right-click /apps/sqlpersist/components then select New, Node.

<ref>

[Former Community Member]

hi,

Actually i mean this article example http://helpx.adobe.com/experience-manager/using/first-osgi.html is runing well in my localhost, but this article http://helpx.adobe.com/experience-manager/using/persisting-cq-data-java-content1.html always happen that error: can't compile JSP because com.adobe.cq.CustomerService cannot be resolved to a type.

The both have the same place is the template(jsp) involved the different OSGI servcie, but the second example why the interface cant be resolved to a type ?  so weird.

[smacdonald2008]

I suspect that there is something in your development environment. I want to setup a connect session with you. By setting up a connect session - we will get to the bottom of this. I have tested this on 5.5, 5.6, 5,6,1 and 6 - and it works. 

[smacdonald2008]

The article was written and tested on AEM 5.5, and 5.6.x.  The screen shot above is 5.6. 

In the articles - we put in the CQ versions at the start of the articles. See:

[img]Version.png[/img]

As these community articles are tested for AEM 6 - we will state that in the Article Summary section.

I will look into getting this to work on AEM 6. 

[smacdonald2008]

Just tested this article on AEM 6:

http://helpx.adobe.com/experience-manager/using/persisting-cq-data-java-content1.html

It works as expected:

[img]AEM6Persist.png[/img]

The custom service that you built in the above link successfully saves the posted data into the JCR:

[img]AEM6Save.png[/img]

I am very curious as to why you are not getting these results. Email me at scottm@adobe.com. I can setup a connect session with you. I want to see what is happening. In the email - paste a link to this thread and in the subject line put community code. 

Also - when you build the OSGi using Maven - as shown in the article - make sure your POM contains the code that is shown in the article. If you follow along - you can literally copy and paste the POM from the article into your POM. It all works. 

Here is a tip - try to restart AEM too. See if that helps. 

[Former Community Member]

Get it ,i send a email to you, please check it.