ResourceVersioningDialectConfig.java

@Configuration
public class ResourceVersioningDialectConfig {


	@Bean
	public ResourceVersioningDialect getResourceVersioningDialect() {
		return new ResourceVersioningDialect();
	}
	
	
	static class ResourceVersioningDialect extends AbstractProcessorDialect {
		static final String NAME = "RVDialect";
		static final String PREFIX = "th";
		static final int PRECEDENCE = 800;
		
		public ResourceVersioningDialect() {
			super(NAME, PREFIX, PRECEDENCE);
		}
		
		protected ResourceVersioningDialect(String name, String prefix, int processorPrecedence) {
			super(name, prefix, processorPrecedence);
		}

		@Override
		public Set<IProcessor> getProcessors(String dialectPrefix) {
			LinkedHashSet<IProcessor> processors = new LinkedHashSet<>();
	        processors.add( new VSRC(TemplateMode.HTML, dialectPrefix));
	        processors.add( new VHREF(TemplateMode.HTML, dialectPrefix));
	        return processors;
		}
	}

	
	static class VSRC extends AbstractAttributeTagProcessor {
		
		public static final int ATTR_PRECEDENCE = 1300;
	    public static final String ATTR_NAME = "vsrc";
	    public static final long INIT_TIMEMILLIS = System.currentTimeMillis();

	    public VSRC(TemplateMode templateMode, String dialectPrefix) {
	        super(templateMode, dialectPrefix,  null, false, ATTR_NAME, true, ATTR_PRECEDENCE, true);
	    }

		@Override
		protected void doProcess(ITemplateContext context, IProcessableElementTag tag, AttributeName attributeName,
				String attributeValue, IElementTagStructureHandler structureHandler) {

			String returnVal = attributeValue;
			
			if(returnVal != null) {
				
				returnVal += returnVal.contains("?") ? "&" : "?";
				returnVal += "v="+INIT_TIMEMILLIS;
			}
			
			structureHandler.setAttribute("src", returnVal );
			
		}
	}
	
	static class VHREF extends AbstractAttributeTagProcessor {
		
		public static final int ATTR_PRECEDENCE = 1300;
	    public static final String ATTR_NAME = "vhref";
	    public static final long INIT_TIMEMILLIS = System.currentTimeMillis();

	    public VHREF(TemplateMode templateMode, String dialectPrefix) {
	        super(templateMode, dialectPrefix,  null, false, ATTR_NAME, true, ATTR_PRECEDENCE, true);
	    }

		@Override
		protected void doProcess(ITemplateContext context, IProcessableElementTag tag, AttributeName attributeName,
				String attributeValue, IElementTagStructureHandler structureHandler) {

			String returnVal = attributeValue;
			
			if(returnVal != null) {
				
				returnVal += returnVal.contains("?") ? "&" : "?";
				returnVal += "v="+INIT_TIMEMILLIS;
			}
			
			structureHandler.setAttribute("href", returnVal );
			
		}
	}

}