1. the need to perform custom actions on portal startup or user login,
2. overwrite or extend portal JSPs,
3. modify portal properties,
4. replace a portal service with your own implementation.
In general, there are four kinds of hook parameters:
- portal-properties (called portal properties hooks)
- language-properties (called language properties hooks)
- custom-jsp-dir (called custom JSPs hooks) and
- service (called portal service hooks)
Language properties hooks allow us to install new translations or override few words in existing translations.
JSP hooks provide a way to easily modify JSP files without having to alter the core of the portal
Portal service hooks provide a way to easily override portal services.
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