Osgi workflowprocess gives classnotfound exception when osgi bundle is activated

Question

I did create an osgi service that extends workflowprocess interrface using eclipse. I install the bundle that contains this service and then deploy and activate the bundle in day cq. However, on activation I receive an error stating that my class is not found. Please note that both this service and the referenced service(twitterservice that I created) gets registered and the bundle is activated, however, its unable to find the class SendMessageProcessAction on the activation of the bundle. Hope someone could assist.
POST /system/console/bundles/246 HTTP/1.1] com.day.twitter.workflow [com.day.twitter.service.impl.SendMessageProcessAction] Error during instantiation of the implementation object (java.lang.ClassNotFoundException: com.day.twitter.service.impl.SendMessageProcessAction not found by com.day.twitter.workflow [246]) java.lang.ClassNotFoundException: com.day.twitter.service.impl.SendMessageProcessAction not found by com.day.twitter.workflow [246]
    at org.apache.felix.framework.ModuleImpl.findClassOrResourceByDelegation(ModuleImpl.java:787 )
    at org.apache.felix.framework.ModuleImpl.access$400(ModuleImpl.java:71)
package com.day.twitter.service.impl;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Properties;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.Service;
import org.osgi.framework.Constants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.day.cq.workflow.WorkflowException;
import com.day.cq.workflow.WorkflowSession;
import com.day.cq.workflow.exec.WorkItem;
import com.day.cq.workflow.exec.WorkflowData;
import com.day.cq.workflow.exec.WorkflowProcess;
import com.day.cq.workflow.metadata.MetaDataMap;
import com.day.twitter.service.SendMessageProcess;
import com.day.twitter.service.TwitterService;
@Component
@Service
@Properties({
    @Property(name = Constants.SERVICE_DESCRIPTION, value = " An example of Social Publish Implementation"),
    @Property(name = Constants.SERVICE_VENDOR, value = "RIM POC"),
    @Property(name = "process.label", value = "RIM POC Social Publish")
public class SendMessageProcessAction implements WorkflowProcess{
    @Reference
    private TwitterService twitterService; 
    public TwitterService getTwitterService() {
        return twitterService;
    public void setTwitterService(TwitterService twitterService) {
        this.twitterService = twitterService;
     * @scr.reference
    private static final String TYPE_JCR_PATH = "JCR_PATH";
    private final Logger logger = LoggerFactory.getLogger(this.getClass()
            .getName());
    private final Logger logger1 = LoggerFactory.getLogger(SendMessageProcessAction.class);
    public void execute(WorkItem workItem, WorkflowSession workflowSession,MetaDataMap args)
    throws WorkflowException {
        final Session session = workflowSession.getSession();
        final WorkflowData data = workItem.getWorkflowData();
        logger.info("TEST VIBHOR!!");
        logger1.info("TEST VIBHOR BHATIA!!");
        String path = null;
        String type = data.getPayloadType();
        if (type.equals(TYPE_JCR_PATH) && data.getPayload() != null) {
            String payloadData = (String) data.getPayload();
            try {
                if (session.itemExists(payloadData)) {
                    path = payloadData;
            } catch (RepositoryException e) {
                // TODO Auto-generated catch block
                logger.error("Exception - Check repository for Payload data path");
                e.printStackTrace();
        logger.info("arguments");
        String msg = "CQ5 workflow event";
            // is there a message?
        String argument = args.get("PROCESS_ARGS", "default value");
        boolean equal = argument.equals("argument1");
        if(equal){
            String recipient = argument.toString();
             sendDirectMessageOnTwitter(recipient, msg, path);
        } else {
            logger
                    .error("for sending a DM on Twitter (make sure Twitter allows you to DM that account): dm,(recipient id)");   
           //  return "Check config - error";
    private void sendDirectMessageOnTwitter(String recipient, String msg, String path) {
        getTwitterService().sendDirectMessage(recipient, msg + ", path: " + path);

Answer 1

<plugin>
        <groupId>org.apache.felix</groupId>
        <artifactId>maven-bundle-plugin</artifactId>
        <version>2.0.1</version>
        <extensions>true</extensions>
        <configuration>
          <instructions>
            <Bundle-Name>cq-core bundle</Bundle-Name>
            <Export-Package>twitter4j.*</Export-Package>
            <Import-Package>
                  !twitter4j.internal.http.alternative,
                  !org.slf4j.impl,com.day.*,*
             </Import-Package>
             <Private-Package>com.day.twitter</Private-Package>  
          </instructions>
        </configuration>
</plugin>
Bnd-LastModified: 1334862237167
Build-Jdk: 1.6.0_21
Built-By: bvibor
Bundle-ManifestVersion: 2
Bundle-Name: cq-core bundle
Bundle-SymbolicName: com.day.twitter.workflow
Bundle-Version: 1.0.0
Created-By: Apache Maven Bundle Plugin
Export-Package: twitter4j.internal.util, twitter4j.internal.http; uses:="twitter4j, twitter4j.internal.logging, twitter4j.internal.util, twitter4j.http, twitter4j.conf, javax.xml.parsers, twitter4j.internal.org.json, org.w3c.dom, org.xml.sax", twitter4j; uses:="twitter4j.internal.org.json, twitter4j.internal.http, twitter4j.api, twitter4j.http, twitter4j.internal.async, twitter4j.conf, twitter4j.internal.logging", twitter4j.internal.org.json, twitter4j.api; uses:=twitter4j, twitter4j.http; uses:="twitter4j.internal.http, twitter4j, twitter4j.conf, javax.crypto.spec, javax.crypto, twitter4j.internal.logging", twitter4j.internal.async, twitter4j.conf; uses:="twitter4j.internal.http, twitter4j.http, twitter4j.internal.async, twitter4j", twitter4j.internal.logging; uses:="org.apache.commons.logging, org.apache.log4j, org.slf4j, twitter4j.conf", twitter4j.util; uses:="twitter4j.internal.http, twitter4j, twitter4j.internal.org.json, twitter4j.http"
Ignore-Package: org.slf4j.impl, twitter4j.internal.http.alternative
Import-Package: javax.crypto, javax.crypto.spec, javax.xml.parsers, org.apache.commons.logging, org.apache.log4j, org.osgi.framework; version="1.4", org.slf4j; version="1.5", org.w3c.dom, org.xml.sax, twitter4j, twitter4j.api, twitter4j.conf, twitter4j.http, twitter4j.internal.async, twitter4j.internal.http, twitter4j.internal.logging, twitter4j.internal.org.json, twitter4j.internal.util, twitter4j.util
Manifest-Version: 1.0
Service-Component: OSGI-INF/components.xml
Tool: Bnd-0.0.357