Examples of org.apache.velocity.app.VelocityEngine

org.apache.velocity.app.VelocityEngine

This class provides a separate new-able instance of the Velocity template engine. The alternative model for use is using the Velocity class which employs the singleton model.

Please ensure that you call one of the init() variants. This is critical for proper behavior.

Coming soon : Velocity will call the parameter-less init() at the first use of this class if the init() wasn't explicitly called. While this will ensure that Velocity functions, it almost certainly won't function in the way you intend, so please make sure to call init().
@author Geir Magnusson Jr. @version $Id: VelocityEngine.java,v 1.2.2.1 2001/12/09 19:28:24 geirm Exp $

            if ( !f.getParentFile().exists() )
            {
                f.getParentFile().mkdirs();
            }


            VelocityEngine engine = velocity.getEngine();


            engine.setApplicationAttribute( "baseDirectory", basedir );


            if ( StringUtils.isEmpty( templateEncoding ) )
            {
                templateEncoding =  ReaderFactory.FILE_ENCODING;
                getLog().warn(
                               "File encoding has not been set, using platform encoding " + templateEncoding
                                   + ", i.e. build is platform dependent!" );
            }


            Writer writer = new OutputStreamWriter( new FileOutputStream( f ), templateEncoding );


            Template velocityTemplate = engine.getTemplate( templateDirectory + "/" + template, templateEncoding );


            velocityTemplate.merge( context, writer );


            writer.flush();

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  }


  private static String logChuteName = null;


  private void initializeVelocity() {
    this.velocityEngine = new VelocityEngine();


    // These  properties tell Velocity to use its own classpath-based
    // loader, then drop down to check the root and the current folder
    velocityEngine.addProperty("resource.loader", "class, file");
    velocityEngine.addProperty("class.resource.loader.class",

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            props.put("resource.loader", "cayenne");
            props.put("cayenne.resource.loader.class", ClassGeneratorResourceLoader.class
                    .getName());
            props.put("cayenne.resource.loader.cache", "false");


            VelocityEngine velocityEngine = new VelocityEngine();
            velocityEngine.init(props);


            template = velocityEngine.getTemplate(templateName);
            templateCache.put(templateName, template);
        }


        return template;
    }

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      }


      this.configMap = map;


      // Initialise velocity engine
      this.ve = new VelocityEngine();


      this.ve.setProperty("runtime.log.logsystem.class",
                             "org.apache.velocity.runtime.log.SimpleLog4JLogSystem");
      this.ve.setProperty("runtime.log.logsystem.log4j.category",
                             log.getName() + ".VelocityEngine");

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            Map<String, Object> dataModel, MediaType mediaType) {
        super(mediaType);


        try {
            setDataModel(dataModel);
            this.engine = new VelocityEngine();
            this.template = null;
            this.templateName = templateName;
        } catch (Exception e) {
            e.printStackTrace();
        }

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  public VelocityServletSerializer() {
    try {
          Properties properties = PropertiesUtils.getProperties(getPropertiesName());
          properties.setProperty("resource.loader", "classpath");
          properties.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
          velocityEngine = new VelocityEngine(properties);
    } catch (RuntimeException e) {
      throw e;
    } catch (Exception e) {
      throw new RuntimeException(e.getMessage(), e);
    }

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    /** @see Reporter */
    public void end()
        throws Exception {


        VelocityEngine engine = new VelocityEngine();
        engine.init();


        VelocityContext ctx = new VelocityContext();


        ctx.put("root", root);
        ctx.put("names", names);
        ctx.put("values", values);


        StringWriter writer = new StringWriter();


        if (engine.mergeTemplate(template, ctx, writer) != true) {
            throw new Exception("Error processing template");
        }


        writer.flush();

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            throw new RuntimeException(ex);
        }
    }


    private static VelocityEngine createEngine() {
        VelocityEngine ret = new VelocityEngine();


        return ret;
    }

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  private VelocityEngine velocityEngine;


  public VelocityListingsPage() {
    try {
      Properties props = PropertyUtils.getProperties("velocity.properties");
      velocityEngine = new VelocityEngine();
      velocityEngine.setProperty("resource.loader", "list");
      velocityEngine.init(props);
    } catch (Exception e) {
      LOG.warn(e.getMessage());
    }

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import org.apache.velocity.runtime.RuntimeConstants;


public class Velocity_test {


  public static void main(String[] args) throws Exception {
    VelocityEngine ve = new VelocityEngine();//PropertyUtils.getProperties("server.properties"));
    ve.setProperty("error.resource.loader.class",
      //"org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
      "org.apache.velocity.runtime.resource.loader.URLResourceLoader");
    ve.setProperty(
      RuntimeConstants.RUNTIME_LOG_LOGSYSTEM_CLASS,
            "org.apache.velocity.runtime.log.Log4JLogChute");
    ve.setProperty("runtime.log.logsystem.log4j.logger", "org.tamacat.Test");
    ve.init();
    System.out.println(ve.getTemplate("htdocs/web/index.vm").getData());
  }

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