Chapter 5. Development Best Practices

In the previous chapters, we learned about various configuration best practices including caching best practices. Liferay Portal is a portal platform, and portal solutions are developed on top of it. Hence, it is very important to follow best practices during the development of custom features to build high performing portal solutions. In this chapter, we will focus on Liferay-Portal-specific development best practices. By the end of this chapter, we will learn the following topics:

• UI best practices

  • Reducing the number of JavaScript files

  • Reducing the number of CSS files

  • Using CSS image sprites

  • Minifying JavaScript files

  • JavaScript tag positioning

  • Analyzing web page performance using tools

• Java development best practices

  • Use of dynamic query and custom queries

  • Use of the Cache API to cache resources

  • Coding best practices