Solr Classes in dotCMS OSGI - not working

SolrTool.java

package com.aquent.solr;

import org.apache.solr.client.solrj.SolrQuery;
import org.apache.solr.client.solrj.SolrServer;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.common.SolrDocumentList;
import org.apache.velocity.tools.view.tools.ViewTool;

import com.dotmarketing.util.Logger;

public class SolrTool implements ViewTool {
	
	@Override
	public void init(Object arg0) {
		
	}
	
	public SolrDocumentList getResults(String query) {
		SolrServer server = SolrUtil.getInstance().getSolrServer();
		SolrQuery sq = new SolrQuery().setQuery(query);
		QueryResponse qr;
		try {
			qr = server.query(sq);
		} catch (Exception e) {
			server = SolrUtil.getInstance().refreshServer();
			try {
				qr = server.query(sq);
			} catch (Exception e1) {
				Logger.error(this, "Solr Lookup for query: "+query+" Failed with Exception on 2nd Try", e1);
				return null;
			}
		}
		return qr.getResults();
	}

}

SolrUtil.java

package com.aquent.solr;


import org.apache.solr.client.solrj.SolrServer;
import org.apache.solr.client.solrj.impl.HttpSolrServer;

import com.dotmarketing.business.APILocator;
import com.dotmarketing.util.Logger;

public class SolrUtil {
	public static final SolrUtil INSTANCE = new SolrUtil();
	
	private SolrServer server = null;
	
	private SolrUtil() { }
	
	public static SolrUtil getInstance() {
		return INSTANCE;
	}
	
	public SolrServer getSolrServer() {
		if(server == null) {
			// Get the solrserver from the default host
			String solrserver;
			try {
				solrserver = APILocator.getHostAPI()
						.findDefaultHost(APILocator.getUserAPI().getSystemUser(), false)
						.getStringProperty("SolrServerUrl");
			} catch (Exception e) {
				Logger.error(this, "Error getting solr server url from the host", e);
				return null;
			}
			
			synchronized(SolrUtil.class) {
				if(server == null) {
					server = new HttpSolrServer(solrserver);
				}
			}
			Logger.info(this, "Initialized solr server");
			
		}
		
		return server;
	}
	
	public SolrServer refreshServer() {
		String solrserver = null;
		try {
			solrserver=APILocator.getPluginAPI().loadProperty("com.aquent", "solrserver");
			Logger.info(this, "Refreshing solr server with url: "+solrserver);
		} catch(Exception e) {
			Logger.error(this, "Unable to load plugin properties", e);
		}
		if(solrserver == null) {
			Logger.info(this, "No Solr Server from plugin properties - bailing");
			return null;
		}
		
		server = new HttpSolrServer(solrserver);
		Logger.info(this, "Refreshed solr server");
		return server;
	}
}