CODEWITHSUNDEEP
javascalavelocity
Archer
Archer

Reputation: 631

Unable to find velocity template resources

Just a simple velocity standalone app based on maven structure. Here is the code snippet written in Scala to render the template helloworld.vm in ${basedir}/src/main/resources folder: 

com.ggd543.velocitydemo

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

/**
 * @author ${user.name}
 */
object App {

  def main(args: Array[String]) {
    //First , get and initialize an engine
    val ve = new VelocityEngine();
    ve.init();

    //Second, get the template
    val resUrl = getClass.getResource("/helloworld.vm")
    val t = ve.getTemplate("helloworld.vm");   // not work 
//    val t = ve.getTemplate("/helloworld.vm");  // not work
//    val t = ve.getTemplate(resUrl.toString);  // not work yet
    //Third, create a context and add data
    val context = new VelocityContext();
    context.put("name", "Archer")
    context.put("site", "http://www.baidu.com")
    //Finally , render the template into a StringWriter
    val sw = new StringWriter
    t.merge(context, sw)
    println(sw.toString);
  }

}

when to compile and run the program, I got the following error:

2012-1-29 14:03:59 org.apache.velocity.runtime.log.JdkLogChute log
严重: ResourceManager : unable to find resource '/helloworld.vm' in any resource loader.
Exception in thread "main" org.apache.velocity.exception.ResourceNotFoundException: Unable to find resource '/helloworld.vm'
    at org.apache.velocity.runtime.resource.ResourceManagerImpl.loadResource(ResourceManagerImpl.java:474)
    at org.apache.velocity.runtime.resource.ResourceManagerImpl.getResource(ResourceManagerImpl.java:352)
    at org.apache.velocity.runtime.RuntimeInstance.getTemplate(RuntimeInstance.java:1533)
    at org.apache.velocity.runtime.RuntimeInstance.getTemplate(RuntimeInstance.java:1514)
    at org.apache.velocity.app.VelocityEngine.getTemplate(VelocityEngine.java:373)
    at com.ggd543.velocitydemo.App$.main(App.scala:20)
    at com.ggd543.velocitydemo.App.main(App.scala)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

Process finished with exit code 1

Upvotes: 63

Views: 121468

Answers (14)

A.Casanova
A.Casanova

Reputation: 1017

Using IntelIJ Idea community 2021.3, you just need to start your project with this config:

    VelocityEngine engine = new VelocityEngine();
    Properties props = new Properties();
    final String path = "src/main/resources/templates/";
    props.put("file.resource.loader.path", path);
    engine.init(props);

You can put whatever path you want but realize that it will start from the project_root defined in the idea.

DISCLAIMER This solution may NOT work outside the IDE

Upvotes: 0

wau
wau

Reputation: 830

Make sure you have a properly configured resource loader. See Velocity documentation for help selecting and configuring a resource loader: https://velocity.apache.org/engine/1.7/developer-guide.html#configuring-resource-loaders

Upvotes: 3

Susan Liya
Susan Liya

Reputation: 11

The following code helped me resolve the issue. The path to the template needs to be provided as part of file.resource.loader path. By default it comes as "." . So setting the property explicitly will be required.

Print getClass().getClassLoader().getResource("resources") or getClass().getClassLoader().getResource("") to see where your template comes and based on that set it in the velocity template engine.

URL url = getClass().getClassLoader().getResource("resources");
//URL url = getClass().getClassLoader().getResource("");
File folder= new File(url.getFile());   
VelocityEngine ve = new VelocityEngine();
       
ve.setProperty(Velocity.FILE_RESOURCE_LOADER_PATH, folder.getAbsolutePath());
ve.init();

Template template = ve.getTemplate( "MyTemplate.vm" );

Upvotes: 1

gihan-maduranga
gihan-maduranga

Reputation: 4801

I have put this working code snippet for future references. The code sample was written with Apache velocity version 1.7 with embedded Jetty.

Velocity template path is located at the resource folder email_templates subfolder.

enter image description here

Code Snippet in Java (Snippets are worked both running on eclipse and inside a Jar)

    templateName = "/email_templates/byoa.tpl.vm"
    VelocityEngine ve = new VelocityEngine();
    ve.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
    ve.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
    ve.init();
    Template t = ve.getTemplate(this.templateName);
    VelocityContext velocityContext = new VelocityContext();
    velocityContext.put("","") // put your template values here
    StringWriter writer = new StringWriter();
    t.merge(this.velocityContext, writer);

System.out.println(writer.toString()); // print the updated template as string

For OSGI plugging code snippets.

final String TEMPLATE = "resources/template.vm" // located in the resources folder
Thread current = Thread.currentThread();
       ClassLoader oldLoader = current.getContextClassLoader();
       try {
          current.setContextClassLoader(TemplateHelper.class.getClassLoader()); // TemplateHelper is a class inside your jar file
          Properties p = new Properties();
          p.setProperty("resource.loader", "class");
          p.setProperty("class.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
          Velocity.init( p );       
          VelocityEngine ve = new VelocityEngine();
          Template template = Velocity.getTemplate( TEMPLATE );
          VelocityContext context = new VelocityContext();
          context.put("tc", obj);
          StringWriter writer = new StringWriter();
          template.merge( context, writer );
          return writer.toString() ;  
       }  catch(Exception e){
          e.printStackTrace();
       } finally {
          current.setContextClassLoader(oldLoader);
       }

Upvotes: 3

maxwlford224 buenconsejo
maxwlford224 buenconsejo

Reputation: 1

Just a simple velocity standalone app based on maven structure. Here is the code snippet written in Scala to render the template helloworld.vm in 

${basedir}/src/main/resources folder:

Upvotes: -1

Nikhil
Nikhil

Reputation: 1018

I faced a similar issue. I was copying the velocity engine mail templates in wrong folder. Since JavaMailSender and VelocityEngine are declared as resources under MailService, its required to add the templates under resource folder declared for the project.

I made the changes and it worked. Put the templates as 

src/main/resources/templates/<package>/sampleMail.vm

Upvotes: 0

Vishal
Vishal

Reputation: 1492

I faced the similar problem with intellij IDEA. you can use this 

 VelocityEngine ve = new VelocityEngine();
    Properties props = new Properties();
    props.put("file.resource.loader.path", "/Users/Projects/Comparator/src/main/resources/");
    ve.init(props);

    Template t = ve.getTemplate("helloworld.vm");
    VelocityContext context = new VelocityContext();

Upvotes: 5

frank
frank

Reputation: 1201

I put my .vm under the src/main/resources/templates, then the code is :

Properties p = new Properties();
p.setProperty("resource.loader", "class");
p.setProperty("class.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
Velocity.init( p );       
VelocityContext context = new VelocityContext();           
Template template = Velocity.getTemplate("templates/my.vm");

this works in web project.

In eclipse Velocity.getTemplate("my.vm") works since velocity will look for the .vm file in src/main/resources/ or src/main/resources/templates, but in web project, we have to use Velocity.getTemplate("templates/my.vm");

Upvotes: 35

SheoSinha
SheoSinha

Reputation: 107

VelocityEngine velocityEngin = new VelocityEngine();
velocityEngin.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
velocityEngin.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());

velocityEngin.init();

Template template = velocityEngin.getTemplate("nameOfTheTemplateFile.vtl");

you could use the above code to set the properties for velocity template. You can then give the name of the tempalte file when initializing the Template and it will find if it exists in the classpath.

All the above classes come from package org.apache.velocity*

Upvotes: 2

user689307
user689307

Reputation: 3

You can also put your templates folder under src/main/resources instead of src/main/java. Works for me and it's a preferable location since templates are not java source.

Upvotes: 0

SzB
SzB

Reputation: 1037

While using embedded jetty the property webapp.resource.loader.path should starts with slash:

webapp.resource.loader.path=/templates

otherwise templates will not be found in ../webapp/templates

Upvotes: 0

xDemon
xDemon

Reputation: 23

you can try to add these code:

VelocityEngine ve = new VelocityEngine();
String vmPath = request.getSession().getServletContext().getRealPath("${your dir}");
Properties p = new Properties();
p.setProperty("file.resource.loader.path", vmPath+"//");
ve.init(p);

I do this, and pass!

Upvotes: 2

Guernize
Guernize

Reputation: 123

You can just use it like this: 

Template t = ve.getTemplate("./src/main/resources/templates/email_html_new.vm");

It works.

Upvotes: 9

Sameer Technomark
Sameer Technomark

Reputation: 1409

Great question - I solved my issue today as follows using Ecilpse:

  1. Put your template in the same folder hierarchy as your source code (not in a separate folder hierarchy even if you include it in the build path) as below: Where to put your template file

  2. In your code simply use the following lines of code (assuming you just want the date to be passed as data):

    VelocityEngine ve = new VelocityEngine();
ve.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
ve.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
ve.init();
VelocityContext context = new VelocityContext();
context.put("date", getMyTimestampFunction());
Template t = ve.getTemplate( "templates/email_html_new.vm" );
StringWriter writer = new StringWriter();
t.merge( context, writer );

See how first we tell VelocityEngine to look in the classpath. Without this it wouldn't know where to look.

Upvotes: 109

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