Skip to main content

Aggregating DWR interface scripts

My company has a website and running Yslow on it reported that the no of HTTP requests were in the range of 120-130. Accessing the site from UK was pretty slow. Now we used CSS sprites to reduce the no of css images and we were already using JS and CSS aggregation. There were still 10-12 DWR interface scripts and as browser stops rendering while its downloading and rendering js files. I was looking for a solution for aggregate DWR generated interfaces. I searched a lot and than landed onto JAWR. As we are using build time aggregation for static JS I am using JAWR only for generated interface JS. Here are the things I did.

Add jawr lib to WEB-INF/classes
==============================web.xml============================
    <servlet>
        <servlet-name>JawrServlet</servlet-name>
        <servlet-class>net.jawr.web.servlet.JawrServlet</servlet-class>
        <init-param>
            <param-name>configLocation</param-name>
            <param-value>/jawr.properties</param-value>
        </init-param>
        <init-param>
            <param-name>mapping</param-name>
            <param-value>/jawrBundle/</param-value>
        </init-param>
        <load-on-startup>2</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>JawrServlet</servlet-name>
        <url-pattern>/jawrBundle/*</url-pattern>
    </servlet-mapping>   

Note JAWR servlet should start after DWR servlet   
=====================jawr.properties===============================

# Common properties
jawr.debug.on=false
jawr.gzip.on=true
jawr.gzip.ie6.on=false
jawr.charset.name=UTF-8
jawr.js.bundle.agg_dwr.id=/jawrBundle/agg_dwr.js
jawr.js.bundle.agg_dwr.mappings=dwr:_**
#dont forget the below property.
#I forgot it and struggled for 6 hours after reading JAWR code to figure this out
jawr.dwr.mapping=/dwr/
======================JSP changes==============================
<%@ taglib prefix="jwr" uri="http://jawr.net/tags" %>
<jwr:script src="/jawrBundle/agg_dwr.js"/>
====================================================
Labels:

Comments

  1. This aggregation module exhibit effective Java programmers how to impact with DWR to create coercive AJAX applications. It starts with a tutorial on DWR’s important features and functions. Then it covers surround up the utilization environment.

    ReplyDelete

Post a Comment

Popular posts from this blog

RabbitMQ java clients for beginners

Here is a sample of a consumer and producer example for RabbitMQ. The steps are
Download ErlangDownload Rabbit MQ ServerDownload Rabbit MQ Java client jarsCompile and run the below two class and you are done.
This sample create a Durable Exchange, Queue and a Message. You will have to start the consumer first before you start the for the first time.

For more information on AMQP, Exchanges, Queues, read this excellent tutorial
http://blogs.digitar.com/jjww/2009/01/rabbits-and-warrens/

+++++++++++++++++RabbitMQProducer.java+++++++++++++++++++++++++++
import com.rabbitmq.client.Connection; import com.rabbitmq.client.Channel; import com.rabbitmq.client.*; public class RabbitMQProducer { public static void main(String []args) throws Exception { ConnectionFactory factory = new ConnectionFactory(); factory.setUsername("guest"); factory.setPassword("guest"); factory.setVirtualHost("/"); factory.setHost("127.0.0.1"); factory.setPort(5672); Conne…
23 comments
Read more

Spring query timeout or transaction timeout

If you are using spring to manage transactions then you can specify default transaction timeout using

    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
        <property name="defaultTimeout" value="30" /> <!--30 sec--->             
    </bean>

or you can override the timeout in the annotation

    @Transactional(readOnly = false, timeout=30)


or if you are doing it programatic transactions then you can do


DataSourceTransactionManager transactionManager = new DataSourceTransactionManager(dataSource);
transactionManager.setDefaultTimeout(30);

 or you can override the timeout for one particular transaction

TransactionTemplate transactionTemplate = new TransactionTemplate();
transactionTemplate.setTimeout(30);
Post a Comment
Read more

Python adding pid file

I have a thumbnail generator that launches multiple processes and the correct way to shut it down is to send kill -HUP to the parent process. To automate I had to write a pid file from python, it was a piece of cake
def writePidFile(): pid = str(os.getpid()) f = open('thumbnail_rabbit_consumer.pid', 'w') f.write(pid) f.close()
Post a Comment
Read more