Hi,
I am trying to measure the difference in response times my application has
when I implement the communication either with SOAP/XML or Hessian
protocol.
Hessian is a binary web protocol with Java libraries provided at
http://hessian.caucho.com/.
As jmeter doesn't provide a sampler for Hessian protocol - at least not to
my knowledge -
I am trying to write my own one using the Beanshell sampler.
Unfortunately I get an error message at a place I didn't expect to happen
and I'd appreciate if anyone here could help me with this little sampler.
The message states to miss a method in a particular class that in fact
exists.
Let me show you the code of the Beanshell skript here:
A 'Hello world' string sould be converted into Hessian
and then passed over to Httpclient.
I left the Httpclient stuff here due to simplicity.
//-- start of the script
import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.*;
import org.apache.commons.httpclient.params.HttpMethodParams;
import com.caucho.hessian.client.HessianProxyFactory;
public interface HelloService {
public String hello();
}
public class HelloBasic implements HelloService {
public String hello() {
return "Hello, world";
}
}
public class HttpClientbsh implements HelloService {
private static String url = "http://10.204.88.20/xxx";;
public void httpbsh() {
HessianProxyFactory factory = new HessianProxyFactory();
HelloBasic basic = (HelloBasic)
factory.create(HelloBasic.class, url);
}
}
HttpClientbsh bsh = new HttpClientbsh();
bsh.httpbsh();
//--- end of the script
Below is the message which I receive from jmeter when I run my testplan,
which consists of a single Beanshell sampler only:
Response message: org.apache.jorphan.util.JMeterException: Error invoking
bsh method: source Sourced file: c:\tmp\Hessian.bshrc : Method
Invocation bsh.httpbsh
When I remove the line keeping
"HelloBasic basic = (HelloBasic) factory.create(HelloBasic.class, url);"
then the sampler runs into a green sign when watched at the "View Results
Tree Listener".
However, according the Hessian documentation
I wouldn't be able to setup any proper Hessian client
unless I call factory.create().
After I downloaded the current hessian.jar
I looked up the class HessianProxyFactory for a method 'create()' and, yep,
it exists and is declared to be public.
At this place I must confess that I am not a born Java programmer.
My conclusion is that I used the "HelloBasic basic = ..." in a wrong way,
but I don't know what might be wrong with it.
Please, can anyone who has experience with Beanshell under jmeter help me?
Thanks in advance
Christoph
____________________________________________________________________
Geschäftsführung: Lothar Engelke (Vors.), Hans Berg
Vorsitzender des Aufsichtsrates: Michael Kurtenbach
Sitz der Gesellschaft: Köln
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