Hi,
What is your remote environment? how are you deploying? do you have a
version of Jersey installed in that remote environment?
The error:
WARNING: The provider class, class
com.bbc.newsi.feeds.sport.webservice.provider
s.FreemarkerTemplateProcessor, could not be instantiated
is from Jersey 1.0.2.
For 1.0.3 and above the error will be different, as per the code:
LOGGER.log(Level.SEVERE,
"The provider class, " + c +
", could not be instantiated. Processing will
continue but the class will not be utilized", ex);
Are the versions of Jersey you are using for local and remote
deployment different?
Paul.
On Jun 19, 2009, at 1:23 PM, Jonathan Cook - FM&T wrote:
> No Stack trace. I have tried putting some debug info etc. But
> nothing..
>
> And enabling jetty debugging and jersey server debugging.
>
> Here is the code for the class.. As I said it works on localhost.
>
> That instantiation is definitely the problem. I did some googling
> and see a few people have had the same problem but doesn't appear to
> be an obvious solution?
>
> Thanks
>
> package com.bbc.newsi.feeds.sport.webservice.providers;
>
> import java.io.File;
> import java.io.IOException;
> import java.io.OutputStream;
> import java.io.OutputStreamWriter;
> import java.util.HashMap;
> import java.util.Map;
>
> import javax.ws.rs.WebApplicationException;
> import javax.ws.rs.ext.Provider;
>
> import org.apache.log4j.Logger;
>
> import com.sun.ws.rest.spi.resource.Singleton;
> import com.sun.ws.rest.spi.template.TemplateProcessor;
>
> import freemarker.template.Configuration;
> import freemarker.template.DefaultObjectWrapper;
> import freemarker.template.TemplateException;
>
> /**
> * A simple Freemarker template processor.
> *
> * @author Jonathan Cook
> * @version $Revision: #1 $ $Date: 2009/06/10 $ $Author: cookj02 $
> */
> @Provider
> //_at_Singleton*/
> public class FreemarkerTemplateProcessor implements
> TemplateProcessor {
> private static final Logger log =
> Logger.getLogger(FreemarkerTemplateProcessor.class);
>
> private Configuration config;
>
> public FreemarkerTemplateProcessor(){
> try{
> log.debug("instantiating class");
> }catch(Exception ex){
> log.debug("Error instantiating class");
> }
> }
>
> /**
> * Initialise Freemarker configuration
> */
> private synchronized void init() {
> try{
> log.debug("starting initialisation");
> config = new Configuration();
> config.setDirectoryForTemplateLoading(new
> File("freemarkertemplates"));
> config.setObjectWrapper(new DefaultObjectWrapper());
> log.debug("finishing initialisation");
> } catch(IOException ex){
> log.error("Error loading template directory", ex);
> }
> }
>
> /**
> * Resolve an abstract template path into a fully qualified
> * concrete template path that identifies a template.
> *
> * @param path - The abstract template path
> * @return java.lang.String - The fully qualified concrete template
> path,
> * otherwise null if the abstract template path cannot be resolved.
> */
> public String resolve(String path) {
> if (config == null) {
> init();
> }
> try {
> if (config.getTemplate(path) == null){
> return null;
> }
> } catch (IOException ex) {
> log.error("Error resolving template for path " +path, ex);
> return null;
> }
> return path;
> }
>
> /**
> * Process a template and write the result to an output stream.
> *
> * @param resolvedPath - The resolved path identifying a template
> obtained by calling the resolve method.
> * @param object - The model to be passed to the template.
> * @param out - The output stream to write the result of processing
> the template.
> *
> * @throws java.io.IOException - if there was an error processing
> the template.
> */
> public void writeTo(String resolvedPath, Object object,
> OutputStream out)
> throws IOException {
> Map<String, Object> model = new HashMap<String, Object>();
> model.put("resource", object);
> try {
> log.debug(resolvedPath);
> config.getTemplate(resolvedPath).process(model, new
> OutputStreamWriter(out));
> } catch (TemplateException ex) {
> throw new WebApplicationException(ex);
> }
> }
> }
>
> From: Paul.Sandoz_at_Sun.COM [mailto:Paul.Sandoz_at_Sun.COM]
> Sent: 19 June 2009 12:20
> To: users_at_jersey.dev.java.net
> Cc: Jonathan Cook - FM&T
> Subject: Re: [Jersey] Cannot Instantiate new provider
>
>
> On Jun 19, 2009, at 12:51 PM, Jonathan Cook - FM&T wrote:
>
>> Hi,
>>
>> I have a problem were I have written my own
>> FreeMarkerTemplateProcessor. Everything works nicely but when I
>> deploy my application it registers the new provider successfully
>> but then it complains that it can't instantiate the new class and
>> then goes on to fail I assume because it can't do the freemarker
>> initialisation.
>>
>> 19-Jun-2009 11:11:58
>> com.sun.ws.rest.api.core.PackagesResourceConfig init
>> INFO: Provider classes found:
>> class
>> com
>> .bbc.newsi.feeds.sport.webservice.providers.FreemarkerTemplateProcess
>> or
>> 19-Jun-2009 11:11:58
>> com.sun.ws.rest.impl.application.ComponentProviderCache get
>> Component
>> WARNING: The provider class, class
>> com.bbc.newsi.feeds.sport.webservice.provider
>> s.FreemarkerTemplateProcessor, could not be instantiated
>
> Is any stack trace provided as to why it cannot instantiate?
>
> Can you send the code for the class?
>
>
>>
>> 2009-06-19 11:11:58.110::WARN: /football/includepathgenerator:
>> java.io.IOExcept
>> ion: The template name, /include_path_generator.ftl, could not be
>> resolved to th
>> e path of a template
>>
>> Should I have a default constructor explicitly in the class? Is
>> there some condition when accessing the application remotely that
>> the templateprocessor won't get instantiated because as I say it
>> all works locally? I'm using an embedded instance of jetty as the
>> web server.
>>
>
> Are your dependencies correct for the remote deployment?
>
> Paul.
>
>
>>
>> I'm using the following annotations at the top of the class:
>> @Provider
>> @Singleton
>>
>> Any ideas?
>>
>> Thanks
>> Jonathan
>