com.googlecode.objectify.util.MemcacheStatsServlet Maven / Gradle / Ivy

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*** THIS VERSION UPLOADED FOR USE WITH CEDAR-COMMON, TO AVOID DEPENDENCIES ON GOOGLE CODE-BASED MAVEN REPOSITORIES. *** The simplest convenient interface to the Google App Engine datastore

The newest version!

/*
 */

package com.googlecode.objectify.util;

import java.io.IOException;
import java.io.PrintWriter;
import java.text.NumberFormat;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.googlecode.objectify.ObjectifyService;
import com.googlecode.objectify.impl.EntityMemcacheStats;
import com.googlecode.objectify.impl.EntityMemcacheStats.Stat;

/**
 * If you are using the ObjectifyService static factory, you can mount this servlet to see the
 * memcache stats for an instance. This is nothing fancy, but it should give you an idea of what's
 * going on.
 *  
 * @author Jeff Schnitzer
 */
public class MemcacheStatsServlet extends HttpServlet
{
	private static final long serialVersionUID = 1L;

	/**
	 * If you aren't using ObjectifyService, you can extend the servlet and override this method. 
	 */
	protected EntityMemcacheStats getMemcacheStats()
	{
		return ObjectifyService.factory().getMemcacheStats();
	}
	
	/** */
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
	{
		Map stats = getMemcacheStats().getStats();
		
		resp.setContentType("text/html");
		PrintWriter out = resp.getWriter();
		
		out.println("");
		out.println("  ");
		out.println("    ");	// css? we don't need no stinkin' css
		out.println("      ");
		out.println("        ");
		out.println("      ");
		
		NumberFormat percentFmt = NumberFormat.getPercentInstance();
		percentFmt.setMaximumFractionDigits(2);
		
		for (Map.Entry entry: stats.entrySet())
		{
			out.println("");
			out.println("  ");
			out.println("  ");
			out.println("  ");
			out.println("  ");
			out.println("");
		}
		
		out.println("    Hits Misses Percent Kind
" + entry.getValue().getHits() + " " + entry.getValue().getMisses() + " " + percentFmt.format(entry.getValue().getPercent()) + " " + entry.getKey() + "");
		out.println("  ");
		out.println("");
	}
}