> >I call the main-method from my test class the command line.
> >- The method does lookup an Entity EJB on JBoss server.
> >- Get a Property from the Bean
> >- Serialize the Bean using Betwixt
> >
> >Then I tested the same by calling the same method from an servlet, it
> >slowes down dramatically:
> >
> > |Command Line | from Servlet
> >----------+-------------+-------------
> >Lookup | 144 ms | 2490 ms
> >Getter | 17 ms | 2843 ms
> >Serialize | 708 ms | 64147 ms
> >
> >Has anybody an idea what causes this slowdown, or anybody
> >seen something similar before?
> >Any help would be apriciated.
>
> Strange. How is your test set up, that is:
> - Is the command-line class on the same server as JBoss?
yes, it's on the same server, but in another jvm, the tomcat-instance also.
> - Is the test class in the same jar as the bean class?
i didn't package the jar. just plain .class-files-directory in the
classpath.
> - Are you sure the Getter isn't doing another lookup?
I'm sure, the getter getId() only return an Integer. Should be fast.
> - I have no clue why serialization is two orders of magnitude slower...
:(
I was first thinking it's a problem with all the jars in the classpath and
reflection, but it I run my commandline test with the same classpath and the
same jvm options like tomcat, it slows down only about 5 to 10%
>
> Post the tested class and the test class.
The Source is below:
The TestClient-Class (I call this from command line or from the servlet)
------------------------------------------------------------------------
package com.triplemind.samples;
import java.io.IOException;
import java.io.StringWriter;
import java.lang.reflect.Proxy;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import org.apache.commons.betwixt.XMLIntrospector;
import org.apache.commons.betwixt.io.BeanWriter;
import org.apache.commons.betwixt.strategy.ClassNormalizer;
import org.apache.commons.logging.impl.SimpleLog;
import com.triplemind.accommodation.AccommodationRemote;
import com.triplemind.accommodation.AccommodationRemoteHome;
public class TestClient {
public static void main(String[] args) throws IOException {
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
env.put(Context.PROVIDER_URL, "localhost:1099");
env.put("java.naming.factory.url.pkgs",
"org.jboss.naming:org.jnp.interfaces");
try {
Context ctx = new InitialContext(env);
Object obj = ctx.lookup("Accommodation");
System.out.print("Lookuped: ");
System.out.println(obj);
AccommodationRemoteHome home = (AccommodationRemoteHome)
javax.rmi.PortableRemoteObject.
narrow(
obj, AccommodationRemoteHome.class);
long time = System.currentTimeMillis();
AccommodationRemote acco = home.findByPrimaryKey(new Integer(2157));
long time2 = System.currentTimeMillis();
System.out.println(acco.getId());
long time3 = System.currentTimeMillis();
System.out.println(acco.getLocation());
System.out.println("IsProxy: " +
Boolean.toString(java.lang.reflect.Proxy.isProxyClass(acco.getClass())));
System.out.println(acco.getClass().toString() + " implements:");
Class[] interf = acco.getClass().getInterfaces();
for (int i = 0; i < interf.length; i++) {
System.out.println(" - " + interf[i].toString());
}
SimpleLog log = new SimpleLog("Logger");
log.setLevel(log.LOG_LEVEL_ALL);
StringWriter outputWriter = new StringWriter();
BeanWriter beanWriter = new BeanWriter(outputWriter);
XMLIntrospector ispec = beanWriter.getXMLIntrospector();
ispec.setAttributesForPrimitives(false);
ispec.setLog(log);
ispec.setClassNormalizer(new ClassNormalizer() {
public Class normalize(Class clazz) {
if (Proxy.isProxyClass(clazz) && clazz.getInterfaces().length > 0)
{
return clazz.getInterfaces()[0];
}
return clazz;
}
});
beanWriter.getBindingConfiguration().setMapIDs(true);
beanWriter.enablePrettyPrint();
beanWriter.writeXmlDeclaration("<?xml version='1.0' ?>");
System.out.println("write Bean...");
beanWriter.write(acco);
System.out.println(outputWriter.toString());
System.out.println("Duration 1st EJB: " + Long.toString(time2 - time)
+ "ms");
System.out.println("Duration 1st getId: " + Long.toString(time3 -
time2) + "ms");
System.out.println("Duration 1st XML: " +
Long.toString(System.currentTimeMillis() - time3) +
"ms");
log.setLevel(log.LOG_LEVEL_OFF);
time = System.currentTimeMillis();
for (int i = 0; i < 1000; i++) {
beanWriter.write(acco);
}
System.out.println("Duration: " +
Long.toString(System.currentTimeMillis() - time) + "us");
} catch (Exception e) {
e.printStackTrace();
System.out.println("Exception: " + e.getMessage());
}
}
}
Test Servlet, this is very slow
-----------------------------------------------------------------
package com.triplemind.samples;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletOutputStream;
public class TestEJBServlet extends HttpServlet {
protected void service(HttpServletRequest request, HttpServletResponse
response) throws
ServletException, IOException {
ServletOutputStream out = response.getOutputStream();
out.println("<html><body><h1>TestEJBServlet</h1><p>running...</p>");
TestClient.main(new String[] {});
out.println("<p>finished!</p></body></html>");
}
}
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