Tag: Liferay7

Liferay 7 Scheduler

According to software environment Scheduler is mainly used to run program automatic offline. Scheduler calls the service, performs the appropriately assigned task and does its job.

Schedulers are the java processes which trigger certain logic after every specified interval. Schedulers are very important aspect of software development these days. Liferay provides a flexible way for scheduler implementation. Today we will discuss on scheduler implementation on Liferay 7.
Pre-requisites:– Java 1.8 – Liferay 7 must be installed. – Liferay Developer studio And if you haven’t configured your Liferay Server with Developer studio, here are the steps.. Go to window → Preferences → Server → Runtime Environment and then add the server.

Create module in Liferay workspace: To create Liferay modules, Select Modules → Right Click → New → Liferay Module Project. Give appropriate name and click finish.

Project structure will be created in workSpace.

Now create one class named as LiferayScheduler with package name as com.enprowess.schedulerclass.

Liferay7 provides one class that named as BaseSchedulerEntryMessageListener which contains methods related to Scheduler.


Our class LiferayScheduler will extend this BaseSchedulerEntryMessageListener class, that will provide all methods where we have to code in an appropriate method as doReceive(), activate().


For calling scheduler, we use a doReceive method, where we write our logic that will be executed based on defined time interval.


protected void doReceive(Message message) throws Exception {
log.info(“I will be called at every twenty-four hours”);




As Liferay7 doesn’t contain any xml file to define time interval for scheduler , so we need to configure everything in class itself only. To define time interval there is one method called as activate () where we define the interval.



protected void activate() {

schedulerEntryImpl.setTrigger (
TriggerFactoryUtil.createTrigger(getEventListenerClass(), getEventListenerClass(), 24, TimeUnit.HOUR));

_schedulerEngineHelper.register(this, schedulerEntryImpl, DestinationNames.SCHEDULER_DISPATCH);

Here we can change the value of 24 based on our requirements with relevant time unit as hour, minute, seconds.

Now Once we deploy this portlet to server, our service will be called at every twenty-four hours.


Liferay 7 Theme

Liferay 7 Theme

Create a theme in liferay is main part after devloping portlet. Liferay 7 provides easy steps to create a theme.

Simple two steps are there to follow:

  1. Install the Themes Generator

To start with theme theme generator has several dependencies that to be installed . You need to install Node.Js . To download it click Here

Note: To avoid any potential compatibility issues, we recommend installing the Long Term Support (LTS) version of Node.js

Verify installation by following command :

node -v

-NPM(Node Package manager) is installed with Node.js

Next step to create .npmrc file which is used to specify the global location.

To create .npmrc file create one text file as text.txt and than open command prompt and fire

ren text.txt .npmrc.  Command will rename the file as .npmrc

Than edit that .npmrc file and add following line


change username according to your username.

After that you need to set several enviornment variables:

NPM_PACKAGES : C:\Users\USERNAME\.npm-packages

NODE_PATH : C:\Users\USERNAME\.npm-packages\lib\node_modules
In path variable add : C:\Users\USERNAME\.npm-packages

This will allow you to install yeoman and gulp.

Next to install yeoman and gulp

Fire following command in command prompt:

npm install -g yo gulp

You have completed all requiered dependency for theme generator.

Next step to install Theme generator

fire following command to command prompt

npm install -g generator-liferay-theme

Liferay theme allow Saas:

Before we move ahead it is important to know about Saas(Syntactically Awesome Style Sheets) is a CSS preprocessor. It is to CSS what CoffeeScript is to Javascript.
There are two way by which saas can be install are node saas and ruby saas.

Installing Sass from node-sass

By default, the generator uses Sass from node-sass. node-sass requires node-gyp, which in turn requires Python and Visual Studio. The node-gyp installation instructions explain how to set up node-gyp, Python, and Visual Studio. Since Visual Studio is a particularly large dependency, if you aren’t already using Visual Studio you might want to consider using Ruby Sass instead of node-sass.

Installing Ruby Sass and Compass

You need to install Ruby via the Ruby installer. After installing ruby we need to use gem command and to use that we need to set ruby to path variable.

Add following line to path variable : C:\Ruby23-x64\bin

Note : This path may very as per your installation version and system. Please alter path according to your installation directory.

After that run following command :

gem install saas compass

Theme generator and all other requiered are installed.

  1. Generate Theme

Create theme using following command

yo liferay-theme

Provide answers to theme as ;

1) What would like to call your theme?

– Here you provide name of your theme.

2) Would you like to use this as themeId?

– If you want to use displayed as themeId then just press enter else enter new themeId.

3)Which version of Liferay is this theme for?

– Here you can select 7.0 using arrow keys.

4) Enter the path to your app server directory ?
Here you enter path to tomcat where you want to deploy your theme.

5)Enter the URL to your production or development site?
Here provide URL of your site.

now theme is generated , in package.json file change rubySaas property from false to true

For deploy the theme fire following command;

gulp deploy