/**
    * Copyright By Grandsoft Company Limited.  
    * 2013-1-11 下午01:50:45
    */
   package gboat2.base.plugin.struts.velocity;
   
   import java.util.Properties;
   
   import org.apache.struts2.StrutsConstants;
  import org.apache.struts2.views.velocity.VelocityManager;
  import org.apache.velocity.app.Velocity;
  
  import com.opensymphony.xwork2.inject.Inject;
  
  /**
   * 平台对 {@link VelocityManager} 的扩展，实现 vm 文件的热部署。<br>
   * 使用方法为 在 struts.xml 中加入：<pre><code>
   * &lt;!-- 热部署vm文件之用，生产环境可以去掉本项 --&gt;
   * &lt;constant name="struts.velocity.manager.classname" value="gboat2.base.plugin.struts.velocity.GboatVelocityManager" /&gt;
   * </code></pre>
   * @date 2013-1-11
   * @author tanxw
   * @since 1.0
   */
  public class GboatVelocityManager extends VelocityManager {
  
      private boolean devMode = false;
  
      @Inject(StrutsConstants.STRUTS_DEVMODE)
      public void setDevMode(String devMode) {
          this.devMode = "true".equals(devMode);
      }
  
      private void debugIntercept(Properties velocityProperties) {
          String resourceLoader = velocityProperties.getProperty(Velocity.RESOURCE_LOADER);
          if (null == resourceLoader || -1 == resourceLoader.indexOf("debuggboat2")) {
              velocityProperties.setProperty("debuggboat2.resource.loader.description", "debug velocity bundle loader");
              velocityProperties.setProperty("debuggboat2.resource.loader.class", DebugVelocityResourceLoader.class.getName());
              velocityProperties.setProperty("debuggboat2.resource.loader.cache", "false");
              if (null == resourceLoader) {
                  velocityProperties.setProperty(Velocity.RESOURCE_LOADER, "debuggboat2,strutsfile,strutsclass,osgi");
              } else {
                  velocityProperties.setProperty(Velocity.RESOURCE_LOADER, "debuggboat2," + resourceLoader);
              }
          } else {
              if (resourceLoader.endsWith(",debuggboat2")
                      || resourceLoader.indexOf(",strutsfile,") != -1) { // tail
                  resourceLoader = resourceLoader.replace(",debuggboat2", "");
                  velocityProperties.setProperty(Velocity.RESOURCE_LOADER, "debuggboat2," + resourceLoader);
              }
          }
      }
  
      @Override
      public void setVelocityProperties(Properties velocityProperties) {
          if (devMode) {// only intercept in develop mode
              debugIntercept(velocityProperties);
          }
          super.setVelocityProperties(velocityProperties);
      }
  }