Geek Answers Handbook

Speed ​​View on Google Engine

I am trying to use the speed environment in the google engine. I wrote a small program with the main method and tried to run it locally. I get the following exception:

Exception in thread "main" org.apache.velocity.exception.VelocityException: Failed to initialize an instance of org.apache.velocity.runtime.log.ServletLogChute with the current runtime configuration.
  at org.apache.velocity.runtime.log.LogManager.createLogChute (LogManager.java:206)
  at org.apache.velocity.runtime.log.LogManager.updateLog (LogManager.java:255)
  at org.apache.velocity.runtime.RuntimeInstance.initializeLog (RuntimeInstance.java:795)
  at org.apache.velocity.runtime.RuntimeInstance.init (RuntimeInstance.java:250)
  at org.apache.velocity.app.VelocityEngine.init (VelocityEngine.java:107)
  at Main.main (Main.java:10)
Caused by: java.lang.UnsupportedOperationException: Could not retrieve ServletContext from application attributes
  at org.apache.velocity.runtime.log.ServletLogChute.init (ServletLogChute.java:73)
  at org.apache.velocity.runtime.log.LogManager.createLogChute (LogManager.java:157)
  ... 5 more

Here is my program:

import java.io.StringWriter;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;

public class Main {
 public static void main(String[] args) throws Exception{
        /*  first, get and initialize an engine  */
        VelocityEngine ve = new VelocityEngine();
        ve.init();
        /*  next, get the Template  */
        Template t = ve.getTemplate( "helloworld.vm" );
        /*  create a context and add data */
        VelocityContext context = new VelocityContext();
        context.put("name", "World");
        /* now render the template into a StringWriter */
        StringWriter writer = new StringWriter();
        t.merge( context, writer );
        /* show the World */
        System.out.println( writer.toString() );    
 }
}

the same program works fine in a regular eclipse project. what could be the problem?

+5
source share
3 answers

It seems that this is only the class ServletLogChutethat requires ServletContext, Velocity itself can work completely autonomously from the Servlet environment.

, , , , ve.init():

ve.setProperty("runtime.log.logsystem.class", "org.apache.velocity.runtime.log.NullLogChute");

... , .

+9

GAE/J.

Apache Click , Velocity , GAE/J.

, , , , GAE/J , .

+2
source

More articles:


All Articles